Release notes from esp_brookesia_micropython

v1.24.0-preview: all: Bump version to 1.24.0-preview.

2024-05-31T06:35:27Z

Signed-off-by: Damien George damien@micropython.org

v1.23.0

2024-05-31T04:20:11Z

Dynamic USB devices, revamped webassembly port, openamp, tls, vfs mod…

v1.22.2: Patch release for rp2 DMA, UART and BLE, esp32 BLE, renesas-ra I2C

2024-02-20T12:20:36Z

This is a patch release containing the following commits:

py/compile: fix potential Py-stack overflow in try-finally with return
extmod/asyncio: support gather of tasks that finish early
extmod/modssl_mbedtls: fix cipher iteration in SSLContext.get_ciphers
extmod/btstack: reset pending_value_handle before calling write-done cb
extmod/btstack: reset pending_value_handle before calling read-done cb
esp32/mpnimbleport: release the GIL while doing NimBLE port deinit
esp32: increase NimBLE task stack size and overflow detection headroom
mimxrt/modmachine: fix deepsleep wakeup pin ifdef
renesas-ra/ra: fix SysTick clock source
renesas-ra/boards/ARDUINO_PORTENTA_C33: fix the RTC clock source
renesas-ra/ra/ra_i2c: fix 1 byte and 2 bytes read issue
rp2/rp2_dma: fix fetching 'write' buffers for writing not reading
rp2/machine_uart: fix event wait in uart.flush() and uart.read()
rp2: change machine.I2S and rp2.DMA to use shared DMA IRQ handlers

v1.22.1: Patch release for rp2 atomic mutex

2024-01-05T02:13:56Z

This is a patch release to fix a race condition and potential deadlock in
the rp2 port's mp_thread_begin_atomic_section() function, when the second
core is in use.

v1.23.0-preview: all: Bump version to 1.23.0-preview.

2024-01-02T07:11:41Z

Signed-off-by: Damien George damien@micropython.org

v1.22.0

2023-12-27T06:00:39Z

SSL support in asyncio, sorted qstr pools, common machine module bind…

v1.22.0-preview: all: Switch to new preview build versioning scheme.

2023-10-06T01:10:14Z

See micropython#12127 for details.

Previously at the point when a release is made, we update mpconfig.h
and set a git tag. i.e. the version increments at the release.

Now the version increments immediately after the release. The workflow is:

Final commit in the cycle updates mpconfig.h to set (X, Y, 0, 0) (i.e.
clear the pre-release state).
This commit is tagged "vX.Y.0".
First commit for the new cycle updates mpconfig.h to set (X, Y+1, 0, 1)
(i.e. increment the minor version, set the pre-release state).
This commit is tagged "vX.Y+1.0-preview".

The idea is that a nightly build is actually a "preview" of the next
release. i.e. any documentation describing the current release may not
actually match the nightly build. So we use "preview" as our semver
pre-release identifier.

Changes in this commit:

Add MICROPY_VERSION_PRERELEASE to mpconfig.h to allow indicating that
this is not a release version.
Remove unused MICROPY_VERSION integer.
Append "-preview" to MICROPY_VERSION_STRING when the pre-release state
is set.
Update py/makeversionhdr.py to no longer generate MICROPY_GIT_HASH.
Remove the one place MICROPY_GIT_HASH was used (it can use
MICROPY_GIT_TAG instead).
Update py/makeversionhdr.py to also understand
MICROPY_VERSION_PRERELEASE in mpconfig.h.
Update py/makeversionhdr.py to convert the git-describe output into
semver-compatible "X.Y.Z-preview.N.gHASH".
Update autobuild.sh to generate filenames using the new scheme.
Update remove_old_firmware.py to match new scheme.
Update mpremote's pyproject.toml to handle the "-preview" suffix in the
tag. setuptools_scm maps to this "rc0" to match PEP440.
Fix docs heading where it incorrectly said "vvX.Y.Z" for release docs.

This work was funded through GitHub Sponsors.

Signed-off-by: Jim Mussared jim.mussared@gmail.com

v1.21.0: U-module renaming, deflate module, IDF 5, board variants and Pico-W BLE

2023-10-05T23:33:14Z

This release of MicroPython sees the renaming of built-in modules to remove
the u-prefix, a new deflate module with optional compression support, the
introduction of board variants, switching of the esp32 port to use IDF 5
together with improved heap management, support for BLE on RPi Pico W
boards, and STM32H5xx support. The project is also now using codespell and
ruff to improve code quality. New boards added in this release are:
ARDUINO_NANO_ESP32 and UM_NANOS3 (esp32 port), ADAFRUIT_METRO_M7 (mimxrt
port), ARDUINO_PORTENTA_C33 and VK_RA6M5 (renesas-ra port),
ADAFRUIT_METRO_M4_EXPRESS (samd port), NUCLEO_L4A6ZG and STM32H573I_DK
(stm32 port).

The renaming of built-in modules to remove the u-prefix -- for example
utime becomes time, uasyncio becomes asyncio -- is done to improve
compatibility with CPython and eliminate confusion about whether to import
the u-version or the non-u-version of the name. Now, one should just
always import the non-u-version and no longer think about u-naming. The
only remaining module with a u-prefix is uctypes because it is not
compatible with the CPython ctypes modules. The following modules are
still available via their u-names for backwards compatibility: array,
asyncio, binascii, bluetooth, collections, cryptolib, errno, hashlib,
heapq, io, json, machine, os, platform, random, re, select, socket, ssl,
struct, time, websocket. These modules (except for asyncio) are also
extensible and can be overridden by a file with the same name, eg time.py.
To force the import of a built-in, one must first clear (and subsequently
restore) sys.path; the ability to write to the sys.path attribute has also
been implemented in this release. For further information see the
discussion at micropython#9018.

Furthermore, importing itself has been tweaked and optimised, and importing
of built-ins no longer touch the filesystem, which makes a typical built-in
import take ~0.15ms rather than 3-5ms. For modules that fail to import,
they are now removed from sys.modules, allowing the import to be attempted
again. This required adding "NLR jump callbacks" to efficiently run some
code if an exception is raised.

Additional improvements to the core runtime include support for conversion
specifiers in f-strings (e.g. !r), speeding up of incremental GC cycles by
tracking the last used block, addition of a new MICROPY_GC_SPLIT_HEAP_AUTO
"auto grow heap" mode and support for pad bytes in struct format. The
documentation, examples and test have also seen general improvements and
additions.

For the extended modules, the zlib C module has been removed and replaced
with a new MicroPython-specific deflate module and DeflateIO class that is
optimised to provide efficient streaming compression and decompression.
The zlib (and gzip) modules are now implemented in pure Python on top of
the deflate module. The timeq module has been removed, it existed only for
a previous version of (u)asyncio and is no longer used. In the ssl
module, SSLContext has been added to be more compatible with CPython. The
select module now supports using system/POSIX poll when possible and the
unix port now uses this implementation instead of its own one. That means
the unix port can now select/poll on custom Python objects that implement
the appropriate ioctl. The socket module now supports SO_BROADCAST, and
sys.std*.buffer objects now exist on unix. There is also a new esp-hosted
network driver for external ESP32-based network coprocessors.

mpy-cross now allows reading source files from stdin and writing compiled
code to stdout.

The esp8266 and esp32 ports add support for the Espressif ESP-NOW protocol,
and the ability to set/get the power saving mode of the WLAN hardware. The
esp8266 port adds board-variant support, combining all boards into a single
ESP8266_GENERIC with FLASH_512K, FLASH_1M and OTA variants.

The esp32 port has now switched exclusively to ESP-IDF 5, and all existing
components have been updated to work with this new IDF (except
esp32.hall_sensor() which has been removed). The FSM ULP has been enabled
for S2 and S3 chips, sockets now support SO_BINDTODEVICE, and board-named
pins and the Pin.board dict have been implemented. The MicroPython heap
has been reworked on this port to support the large variety of memory
configurations: it now starts at 64kbytes and automatically grows as
needed, with new segments allocated from the IDF heap. This means that
boards with SPIRAM have much faster GC collection times if only a small
amount of RAM is used, all available RAM can be used if needed, and the IDF
has access to enough RAM for things like SSL sockets. For more information
see micropython#12141. The esp32 port
has also had its generic boards consolidated and renamed to ESP32_GENERIC,
ESP32_GENERIC_C3, ESP32_GENERIC_S2 and ESP32_GENERIC_S3, and some now have
variants such as SPIRAM.

The mimxrt port has fixes and improvements to PWM and Pin.irq, as well as
support for UART hardware flow control and UART.deinit. It has also seen
integration of WiFi via the CYW43 driver, and Bluetooth via NimBLE. The
mbedTLS bindings have enabled time validation of certificates.

The renesas-ra port has changed board names to match the product name,
updated to use FSP v4.4.0, added support for: RA6M5 MCUs, machine PWM, DAC,
RNG and SDCard classes, TinyUSB, Bluetooth via NimBLE, networking via lwIP,
and mbedTLS.

Bluetooth support has also been added to the rp2 port for the Pico W board.
And the RPi boards have been renamed from PICO to RPI_PICO, and PICO_W to
RPI_PICO_W. Lightsleep has been fixed on this port so it works while WiFi
is powered off, and time.time_ns() now has microsecond resolution.

The samd port sees the addition of SPI and QSPI flash drivers to support
filesystems on external flash.

The stm32 port add support for STM32H5xx MCUs, basic support for the
OCTOSPI peripheral, and USB support for STM32L1xx MCUs. New functions have
been added to the stm module to support the sub-GHz radio on STM32WL55.

In micropython-lib, an extensive LoRa module has been added along with
drivers for SX126x and SX127x chipsets, and the STM32WL55. This module
supports both synchronous and asynchronous (asyncio) mode. Also, as part
of the u-module renaming, urequests has been renamed to requests (but for
backwards compatibility "import urequests" still works for now).

The change in code size since the previous release for various ports is
(absolute and percentage change in the text section):

   bare-arm:    +192  +0.340%
minimal x86:    +310  +0.169%
   unix x64:   +4784  +0.610%
      stm32:    -524  -0.134%
     cc3200:    +280  +0.154%
    esp8266:   +8016  +1.151%
      esp32: +112133  +7.293%
     mimxrt:   +3624  +1.015%
 renesas-ra:   -2184  -0.348%
        nrf:    +616  +0.332%
        rp2:   +1920  +0.595%
       samd:   -7904  -2.953%

The changes that dominate these numbers are:

bare-arm, minimal, cc3200, nrf: NLR jump callbacks and support for
extensible modules
unix: update of mbedTLS to v2.28.1, support for polling Python objects in
select module
stm32: removal of the timeq module
esp8266: addition of the espnow module
esp32: switching to ESP-IDF 5
mimxrt: UART features, time validation of SSL certificates
renesas-ra: move to FSP v4.4.0, remove timeq module
rp2: machine.PWM enhancements
samd: drop support for VfsLfs1

Performance is effectively unchanged since the previous release.

Note that this is the last release to use the current versioning scheme for
nightly/unstable builds, whereby a build between releases is versioned as
v1.20.0--g (following the release of v1.20.0). Moving forward,
nightly builds will now be called preview builds and be versioned with the
next release number. For example, if the last release was v1.21.0 then
preview releases will be of the form v1.22.0-preview..g. For
discussion see micropython#12127.

Thanks to everyone who contributed to this release:
Adam Green, Alexander Wilde, algonell, Andrew Leech, Andy Piper, Angus
Gratton, Armin Brauns, brave ulysses, Brett Cannon, Brian 'redbeard'
Harrington, Carlosgg, Chris Wilson, Christian Clauss, Damien George, Damien
Tournoud, Daniël van de Giessen, David Grayson, David Lechner, David Yang,
dotnfc, Duncan Lowther, Elecia White, elibdev, Elvis Pfutzenreuter, Felix
Dörre, Francis Dela Cruz, Glenn Moloney, glenn20, iabdalkader, Ihor
Nehrutsa, Jared Hancock, Jim Lipsey, Jim Mussared, Jon Nordby, Jonas
Scharpf, Jos Verlinde, Kwabena W. Agyeman, Luca Burelli, marble, Mark
Grosen, mbedNoobNinja, mcskatkat, Mingjie Shen, Mirko Vogt, Nicholas H.
Tollervey, Oliver Joos, Ondrej Wisniewski, patrick, Peter Harper, Phil
Howard, Philipp Ebensberger, Rene Straub, robert-hh, Sebastian Romero, Seon
Rozenblum, stephanelsmith, stijn, Takeo Takahashi, Thomas, Tobias
Thyrrestrup, UnexpectedMaker, Victor Rajewski, vsfos, Wang Xuancong, Wanlin
Wang, Wilko Nienhaus, Wind-stormger, Yaroslav Halchenko, Yilin Sun, Yuuki
NAGAO.

The work done in this release was funded in part through GitHub Sponsors,
and in part by George Robotics, Planet Innovation, Espressif, Arduino, LEGO
Education and OpenMV.

What follows is a detailed list of changes, generated from the git commit
history, and organised into sections.

Main components

all:

fix spelling mistakes based on codespell check
fix strings with backslash by using raw string literals
fix various Python coding inconsistencies found by ruff
fix cases of Python variable assigned but never used
rename MP_QSTR_umodule to MP_QSTR_module everywhere
rename mp_umodule*, mp_module_umodule* to remove the "u" prefix
rename mod_umodule*, ^umodule* to remove the "u" prefix
rename UMODULE to MODULE in preprocessor/Makefile vars
rename umodule.h to remove the "u" prefix
rename umodule.c to remove the "u" prefix
use MP_REGISTER_EXTENSIBLE_MODULE for overrideable built-ins
replace all uses of umodule in Python code
remove the zlib module
remove query-variants make target
add missing imports for micropython.const
add Black configuration section to pyproject.toml
add ruff to pre-commit
CODECONVENTIONS: require that commits be signed-off by the author

py core:

ringbuf: implement put_bytes/get_bytes functions
parse: fix build when COMP_CONST_FOLDING=0 and COMP_MODULE_CONST=1
compile: remove over-eager optimisation of tuples as if condition
stackctrl: add gcc pragmas to ignore dangling-pointer warning
gc: make improvements to MICROPY_GC_HOOK_LOOP
obj: remove mp_generic_unary_op()
objslice: ensure slice is not hashable
objdict: fix hash for dict_view types
objarray: disallow memoryview addition
objstr: return unsupported binop instead of raising TypeError
runtime: if inplace binop fails then try corresponding normal binop
change MP_UNARY_OP_INT to MP_UNARY_OP_INT_MAYBE
obj: accept user types in mp_obj_get_int_maybe
objint: allow int() to parse anything with the buffer protocol
builtinimport: handle empty sys.path correctly
builtinimport: optimise sub-package loading
builtinimport: allow builtin modules to be packages
objmodule: don't use sys.modules to track a builtin init
nlrsetjmp: use MP_NLR_JUMP_HEAD macro to simplify code
nlr: remove commented-out debugging code
nlr: implement jump callbacks
use nlr jump callbacks to optimise compile/execute functions
builtinimport: remove partially-loaded modules from sys.modules
builtinimport: remove weak links
makemoduledefs.py: add a way to register extensible built-in modules
objmodule: add a table of built-in modules with delegation
objmodule: workaround for MSVC with no module delegation
mpconfig: enable module delegation if sys needs it
modsys: allow sys.path to be assigned to
mkrules.mk: automatically configure frozen options when manifest set
parsenum: fix typo in #endif comment
nlraarch64: fix dangerous use of input register
makemoduledefs.py: fix declaring multiple module delegations
makemoduledefs.py: automatically declare delegation attr functions
lexer: allow conversion specifiers in f-strings (e.g. !r)
mkrules.mk: allow $(AFLAGS) to set flags to $(AS)
compile: fix async for's stack handling of iterator expression
builtinimport: fix built-in imports when external import is disabled
stream: add mp_stream___exit___obj that calls mp_stream_close
runtime: always initialise sched_state in mp_init
mpconfig: add MICROPY_PY_PLATFORM, enabled at extra features level
gc: speed up incremental GC cycles by tracking the last used block
gc: apply some code formatting cleanup
gc: add new MICROPY_GC_SPLIT_HEAP_AUTO "auto grow heap" mode
profile: remove the requirement to disable MICROPY_COMP_CONST
mpconfig: enable SSL finalizers if finalizers are enabled
objstr: fix str % {} edge case
modstruct: support pad bytes in struct format
dynruntime.h: implement MP_OBJ_NEW_QSTR
modthread: return thread id from start_new_thread()
malloc: fix DEBUG_print() args in m_realloc_maybe
runtime: add helpers to call a general function on nlr jump callback
parse: always free lexer even if an exception is raised
persistentcode: always close reader even if an exception is raised
gc: add "max new split" value in result of gc.mem_free()
nlrx64: mark nlr_push() as naked function when possible
mkrules.mk: don't strip binary if STRIP variable is unset
change ifdef DEBUG_PRINT to if DEBUG_PRINT
lexer: add missing initialisation for fstring_args_idx

extmod:

utime_mphal: provide a general mktime function
modutime: provide a generic time module
machine_pwm: remove PWM_INIT and PWM_DUTY_U16_NS config options
network_cyw43: add power management constants
vfs_lfsx: fix offset used before range check
extmod.mk: suppress deprecated-non-prototype warning
moduos: move os.sync() into extmod/moduos.c
modtimeq: remove timeq module
btstack: add cmake support for BTstack
btstack: fix marking of static addresses in set_random_address
asyncio: rename uasyncio to asyncio
asyncio/uasyncio.py: add backwards-compatible uasyncio alias
modbinascii: fix buffer length error
update to support mbedtls 3.x
modplatform: set MICROPY_PLATFORM_ARCH on riscv platforms
modbtree: undefine queue macros before including berkeley-db
modssl: add SSLContext class
moddeflate: add deflate module providing the DeflateIO class
modssl_mbedtls: reference SSLContext from SSLSocket
vfs_posix_file: add poll support for missing ERR,HUP,NVAL values
modselect: abstract out a poll_set_t struct and functions
modselect: factor low-level polling code into common function
modselect: add optimisation to use system poll when possible
modselect: remove undocumented support for flags arg to poll
modssl_mbedtls: reject ioctls that are not supported
modssl_mbedtls: fix ioctl of a socket in closed/error state
modselect: properly track number of poll objects that are fd's
modssl_mbedtls: clear sock member if error creating SSLSocket
moddeflate: change default window size
vfs_posix_file: fix flush handling on macOS
vfs_posix_file: implement sys.std*.buffer objects
modlwip: add support for SO_BROADCAST socket option
modsocket: add support for SO_BROADCAST socket option
modssl_mbedtls: call func psa_crypto_init if PSA is used
modssl_mbedtls: ignore err ERR_SSL_RECEIVED_NEW_SESSION_TICKET
modlwip: fix setting of IP option SOF_BROADCAST
network_esp_hosted: add ESP-Hosted networking interface
modssl_axtls: only close underlying socket once if it was used
asyncio/event.py: fix ThreadSafeFlag.ioctl return
btstack/btstack_hci_uart: trigger a poll after UART data is sent
asyncio/stream.py: fix cancellation handling of start_server
modnetwork: increase max hostname length to 32
modnetwork: forward if.config(hostname) to network.hostname
vfs_posix_file: fix flush handling in msvc builds

shared:

upytesthelper: fix spelling of "default"
libc/printf: fix stdout destination for putchar and puts
tinyusb: avoid symbol clash on targets with external TinyUSB
tinyusb: support HS endpoint sizes
netutils/dhcpserver: reply on correct netif

drivers:

cyw43: make the CYW43 Bluetooth HCI driver more portable
esp-hosted: add host driver for ESP-Hosted firmware
ninaw10/nina_bt_hci: make some minor fixes to HCI driver
esp-hosted: fix pin IRQ
esp-hosted: fix MTU size
esp-hosted: add support for WiFI LED activity indicator

mpy-cross:

allow specifying source files starting with -
allow reading from stdin and writing to stdout
when reading from stdin, write output to stdout
allow specifying stdin as input without --
fix source file name in file-not-found error

lib:

mbedtls_errors: update error list for current version of mbedtls
mbedtls: update to mbedtls v2.28.1
mbedtls_errors: add esp32-specific mbedtls error file
mbedtls_errors: update patch and error list for new mbedtls
mbedtls: update to mbedtls v2.28.3
fsp: update FSP for renesas-ra to the latest version v4.4.0
cyw43-driver: update driver to latest version v1.0.1
btstack: update to v1.5.6.2
pico-sdk: update to version 1.5.1
stm32lib: update library for H5 v1.0.0
oofatfs: fix speculative read in create_name
uzlib: add memory-efficient, streaming LZ77 compression support
uzlib/lz77: always use separate history buffer
uzlib/defl_static: implement some code size improvements
uzlib: clean up tinf -> uzlib rename
uzlib: combine zlib/gzip header parsing to allow auto-detect
uzlib/tinflate: implement more compact lookup tables
uzlib/defl_static: optimize zlib_start/finish_block
uzlib: add a source_read_data var to pass to source_read_cb
tinyusb: update to the most recent master
protobuf-c: add protobuf-c library
cyw43-driver: update driver to latest version v1.0.2
micropython-lib: update submodule to latest

Support components

docs:

reference: remove double 'are' in glossary
update the PWM examples based on recent API improvements
samd: make use of pin names more consistent in examples
reference/mpyfiles: add release info on v6.1
library/espnow: update espnow docs for WLAN.config(pm=x) options
develop/porting: add missing code to example main.c and Makefile
reference/speed_python: remove 4-arg limit for viper
mimxrt: add the pin-out for the Adafruit Metro M7 board
samd: add the pin-out for the Adafruit Metro M4 Airlift board
library/index: update built-in extension docs
reference/packages: add GitHub repo to package example dependency
reference/mpremote.rst: extend the mpremote guide
library/index: update docs after umodule rename
rename uasyncio to asyncio
esp32: update esp32 docs based on IDF v5 changes
library/ssl: add documentation for SSLContext
esp32/quickref: add LAN example for WT32-ETH01 version 1.4
library/deflate: add docs for deflate.DeflateIO
develop/gettingstarted: clarify submodule initialization
develop/gettingstarted: update ARM package list
library/neopixel: change link to a micropython-lib reference
library/platform: add docs for the platform library
library/network: clarify network.hostname() behaviour
esp32/tutorial: add example for pin access via registers
library/esp32: update ESP32 idf_heap_info docs to match behaviour
library/gc: clarify mem_alloc and mem_free only for Python heap
conf.py: add sphinxcontrib.jquery to extensions
add requirements.txt file with dependencies for Sphinx
change remaining "urequests" references to "requests"

examples:

usercmodule: add a sub-package example
natmod: rename umodule to module
hwapi: rename uasyncio to asyncio
natmod/deflate: add deflate as a dynamic native module
mark asm, pio, etc. as noqa: F821 (undefined-name)
hwapi: add missing import for 96Boards Carbon example
bluetooth: raise ValueError when advertising data is too large
bluetooth: link to aioble in BLE examples
natmod: add features4 as a class definition example
unix/machine_bios.py: fix typo

tests:

run-tests.py: ensure correct cwd for mpy tests
basics: add more tests for hashing of various types
basics: remove index and inv from special methods tests
import/builtin_ext.py: add test for built-in module override
import/import_pkg9.py: add test for subpackage attribute
replace umodule with module everywhere
run-multitests.py: don't allow imports from the cwd
run-perfbench.py: don't allow imports from the cwd
run-natmodtests.py: don't allow imports from the cwd
float: test domain errors for more combos of args to math funcs
rename uasyncio to asyncio
extmod/uctypes_array_assign_le: fix buffer
extmod/framebuf: fix buffer size issues
extmod: add tests for ssl.SSLContext
extmod: add test for passing cadata into ssl.wrap_socket()
extmod: add deflate.DeflateIO tests
extmod: add coverage tests for select module
extmod: skip select/socket tests if they can't create UDP socket
extmod/select_poll_eintr.py: improve robustness of test
misc/sys_settrace_features.py: fix to run on newer CPython
unix/mod_os: make os.system() test work on windows
run-tests.py: capture output of stderr when running on CPython
multi_net: increase asyncio tests timeouts
stress/bytecode_limit.py: reverse order of cases
float/float_format_ints.py: put power-of-10 test in separate file
extmod/deflate_decompress.py: skip test when not enough memory
extmod/ssl_cadata.py: skip test on axtls
float/math_domain.py: tweak test to also pass with obj-repr-C
extmod/vfs_fat_finaliser.py: tweak test so files are collected
README: document ./run-internalbench.py
run-internalbench.py: remove old CPython reference
multi_net/ssl_cert_rsa.py: update test certificate
extmod/asyncio_threadsafeflag.py: update for unix select

tools:

pyboard.py: rename ProcessPtyToTerminal member "ser" to "serial"
mpremote: remove unused import of serial
pyboard.py: import serial.tools.list_ports
pyboard.py: import errno to fix undefined name in PyboardError
manifestfile.py: fix license capturing
mpremote: add repl option to escape non-printable characters
pydfu.py: use getattr to retrieve getargspec function
mpremote: add sleep command
mpremote: allow terminator for shortcut commands
mpremote: add rtc commands to get and set the RTC
mpremote: handle cp without destination
mpremote: detach mpremote from pyboard.py
mpremote: fix use of stdout_write_bytes function
mpremote: fix exec_ -> exec in commands.py
autobuild: update auto-build code to build esp32 port with IDF v5
autobuild: add support for application .bin files for esp32
mpy-tool.py: use isinstance() for type checking
codeformat.py: skip formatting ESP-IDF managed components
codeformat.py: use pyproject.toml for black config
mpremote: make soft-reset count as an action
autobuild: automatically build all variants for each board
mpy_ld.py: pre-declare some local variables to appease linter
mpy-tool.py: ignore linter failure in Python 2 compatibility code
mpy_ld.py: support more complex rodata sections
metrics.py: fix nrf and rp2 board names after renaming
autobuild: include .bin firmware in renesas-ra build output
autobuild/build-downloads.py: verify standard features
mpremote: add support for rfc2217, serial over TCP
metrics.py: fix esp32 and esp8266 board names after renaming
change remaining "urequests" references to "requests"

CI:

ci.sh: build both SAMD21 and SAMD51 boards as part of samd CI
ci.sh: add functions to check code spelling using codespell
ci.sh: add mimxrt and samd ports to code size build
ci.sh: build PICO_W board as part of rp2 CI
ci.sh: add a H5 board to stm32 CI build
ci.sh: add ARDUINO_PORTENTA_C33 to RA CI build
workflows: fetch full history for mpremote workflow
workflows: add spell check to code formatting workflow
workflows: add GitHub Action to lint Python code with ruff
workflows: force use of Ubuntu-20.04 for unix 32-bit builds
workflows: update esp32 CI to use IDF v5.0
workflows: bump actions/checkout from 3 to 4

The ports

all ports:

use extmod version of mktime instead of port-specific one
remove os.sync() implementation from stm32 and renesas-ra
enable os.sync() for esp32, esp8266, rp2, mimxrt, samd51
standardise docs link in help text
in machine_i2s.c, rename uasyncio to asyncio
simplify board feature tags in board.json
/boards//board.json: remove "id" field
restrict board.json to standard features
rename Arduino board LED pins to be consistent

bare-arm port: no changes specific to this component/port

cc3200 port:

mods/modutime: use extmod version of time module
tools: fix exception raised on process failure
Makefile: build firmware.zip

embed port: no changes specific to this component/port

esp8266 port:

modutime: use extmod version of time module
add support for the Espressif ESP-NOW protocol
machine_pwm: implement duty_u16() and duty_ns() for consistency
add support to set/get power saving mode of WLAN
change network.WLAN from a function to a type
allow Ctrl-C to interrupt the corrupt-fs while loop
machine_pin: accept an integer argument to mp_obj_get_pin_obj
add board variant support
boards/ESP8266_GENERIC: add image filename
boards: make sure modespnow.o is placed in irom0
boards/ESP8266_GENERIC: remove urllib from the 2MiB manifest

esp32 port:

modutime: use extmod version of time module
add support for the Espressif ESP-NOW protocol
add support to set/get power saving mode of WLAN
change network.WLAN from a function to a type
boards: add some missing board configs for two UM boards
esp32_ulp: enable FSM ULP for S2 and S3 chips
uart: use xtal as UART clock source on S3 and C3
modespnow: change name of buffer size config option to "rxbuf"
CMake: change PROJECT_DIR to CMAKE_CURRENT_LIST_DIR
esp32_ulp: fix ULP (FSM) support for S2 and S3
allow Ctrl-C to interrupt the corrupt-fs while loop
switch from UART driver to UART HAL
ppp_set_auth: add pppapi_set_auth from ESP-IDF
modesp32: remove esp32.hall_sensor function
update port to support IDF v5.0.2
in recv_cb, get espnow rssi from recv_info->rx_ctrl
network_wlan: wait for WIFI_EVENT_STA_START after activating
Makefile: provide more IDF shortcuts
boards: change SDK config parameters from deprecated to new ones
modules/inisetup.py: format partition as FAT if its label is ffat
machine_uart: always select a source_clk value in UART config
re-enable mDNS after move to IDF v5.0.2
boards/GENERIC_OTA: enable silent checks to reduce firmware size
network_wlan: wait for STA/AP START/STOP event in wlan.active
machine_timer: switch from legacy driver to timer HAL
machine_pin: add a pin-find func and use it in machine_pin_get_id
use always machine_pin_get_id for getting a Pin id
add support for board-named pins and the Pin.board dict
collect properties from IDF-managed components as well
modmachine: add generic machine.bootloader()
usb: add custom TinyUSB callback support
boards/ARDUINO_NANO_ESP32: add support for Arduino Nano ESP32
CMakeLists: enable multiple extra component directories in build
boards/ARDUINO_NANO_ESP32: fix deploy instructions
main: remove unused mbedtls debug function
machine_wdt: allow feeding WDT from threads
machine_hw_spi: fix access of SPI(2)
machine_hw_spi: remove unnecessary duplicate SPI pin defaults
machine_hw_spi: remove SPI host renaming for C3 and S3 variants
machine_hw_spi: check for valid SPI id in constructor, not init
boards: remove references to the IDF version in board.md files
README: specify that only IDF v5.0.2 is supported
allow malloc() to allocate from SPIRAM
enable automatic Python heap growth
gccollect: make level arg volatile to force recursive function
Makefile: implement make submodules to match other ports
boards/GENERIC: merge with GENERIC_{SPIRAM,OTA,D2WD,UNICORE}
boards/GENERIC_C3: merge with GENERIC_C3_USB
boards/GENERIC_S2: merge with ESP32_S2_WROVER
boards/GENERIC_S3: merge with GENERIC_S3_{SPIRAM,SPIRAM_OCT}
partitions.csv: rename to partitions-4MiB.csv
use uppercase variant names
Makefile: append board variant to BUILD
rename GENERIC* boards to ESP32_GENERIC*
boards/ESP32_GENERIC_C3: enable UART REPL
modsocket: add support for SO_BROADCAST socket option
modnetwork: add support for SO_BINDTODEVICE socket option
support JTAG console, free up UART
machine_uart: release GIL for blocking reads
boards: add pins.csv to UM boards and other minor changes
boards/UM_NANOS3: add new UM NanoS3 board
network_ppp: block after deleting task
boards/ARDUINO_NANO_ESP32: clarify recovery instructions
boards/UM_FEATHERS3: fix I2C pins in pins.csv
skip validation of image on boot from deepsleep
machine_pin: fix null pointer access in machine_pin_find
mphalport: add function/line/file info to check_esp_err exception
fix Partition.writeblocks() partial write corruption
boards: fix VBAT voltage calculation for UM S3 boards
boards: add bootloader rollback support for all builds
main: allow a board to override the MicroPython task stack size
boards/ARDUINO_NANO_ESP32: use Arduino USB IDs
boards/manifest.py: freeze aioespnow into firmware by default

mimxrt port:

modutime: use extmod version of time module
machine_pwm: start PWM only if freq and duty are set
flash: separate low level driver code from flash object
mpconfigport: add back lost uos.urandom()
add missing UART defintion and remove obsolete config
machine_spi: ignore transfers with len=0
machine_pin: perform full configuration in machine_pin_set_mode
sdcard: fix GCC 13 build error with sdcard_cmd_set_bus_width
led: add support for up to four LEDs
boards/ADAFRUIT_METRO_M7: add Adafruit Metro M7 board definition
machine_pwm: fix freq change, PWM print, and error checks
Makefile: use a specific fsl_flexspi_nor_boot.c for mimxrt1062
machine_pin: fix bug when Pin.irq is called without a handler
hal/pwm_backport: fix 0 and 65536 edge cases of PWM's duty_u16
machine_uart: add uart.deinit method and machine_uart_deinit_all
machine_uart: add support for UART hardware flow control
boards: add support for GPIO control of SNVS pins
hal: make flash clock frequency configurable
fix UART RTS/CTS assignments for the OLIMEX and Adafruit boards
machine_pin: extend pin configuration functions
sdio: add SDIO driver
integrate support for WiFi via the CYW43 driver
integrate Bluetooth support with NimBLE bindings
irq: move all IRQ related definitions to dedicated header
machine_uart: fix and complete UART.deinit and uart_deinit_all
boards: fix use of MICROPY_HW_SDRAM_AVAIL in MIMXRT1176.ld
machine_uart: support slow baud rates for UART
machine_uart: add a helper function to change the baudrate
sdio: move config guard so headers are only included if used
Makefile: update to work with latest TinyUSB
mpconfigport: don't override parse chunk alloc
sdio: add support for the 117x series
mimxrt_sdram: allow boards to override the default SDRAM config
Makefile: enable the FSL USDHC for supported MCU series
remove SDCARD Makefile config option
mpbthciport: enable flow control for BT HCI UART
mbedtls: enable certificate validity time validation
machine_uart: set the UART clock to a fixed 40MHz value
boards/MIMXRT1176_clock_config: fix comments about UART clocks
boards: fix naming of SD-card config option
mpbthciport: allow disabling UART flow control for BLE
machine_rtc: improve the RTC init at boot

minimal port: no changes specific to this component/port

nrf port:

modules/utime: use extmod version of time module
boards: rename all nRF boards to use uppercase

pic16bit port: no changes specific to this component/port

powerpc port:

mpconfigport: don't override parse chunk alloc

qemu-arm port: no changes specific to this component/port

renesas-ra port:

change MICROPY_HW_BOARD_NAME definition to product name
modutime: use extmod version of time module
update boards and ra directory files to support FSP v4.4.0
add a macro definition to avoid compile error of FSP v4.4.0
irq: fix typo in comment about IRQ priorities
consolidate hal_entry.c code and remove hal_entry() func
boards/make-pins.py: fix PA/PB pins support
consolidate all fsp_cfg header files to one location
support changing baudrate for UART
add support for RA6M5, and add machine PWM, DAC, SDCard
boards/VK_RA6M5: add new board definition
remove duplicate machine module from constants list
machine_spi: consistently use machine_pin_find to get pin
boards: remove unreachable code in make-pins.py
Makefile: generate binary firmware output
add TinyUSB support
add Bluetooth support using NimBLE
add RNG driver
add networking support using lwIP
add mbedTLS support
fsp_cfg: add common FSP config files
boards/ARDUINO_PORTENTA_C33: add support for Portenta C33
boards/ARDUINO_PORTENTA_C33: update WiFi config
tune lwip buffers and timing to improve network performance

rp2 port:

modutime: use extmod version of time module
machine_pwm: enable keyword args in constructor and add init method
machine_pwm: add support for inverting a PWM channel output
machine_pwm: add duty_x() checks and return 0 if PWM is not started
make rp2_state_machine_exec accept integers
CMakeLists: allow relative MICROPY_BOARD_DIR when invoking cmake
mphalport: only use CYW43 MAC for WLAN0 interface
CMake: normalize MICROPY_PORT_DIR
add Bluetooth support via cyw43
mpbthciport: cancel existing alarms
boards/PICO_W: enable Bluetooth Low Energy support
machine_pin: factor out pin-find code from machine_pin_make_new
use uppercase variant names
Makefile: append board variant to BUILD
rename PICO, PICO_W to RPI_PICO, RPI_PICO_W
machine_timer: fix printing of timer period
mpbthciport: switch to static scheduler nodes
mpbthciport: fix HCI UART config
mpconfigport: disable BLE locking when MICROPY_PY_BLUETOOTH enabled
boards/ARDUINO_NANO_RP2040_CONNECT: use standard HCI UART baudrate
modmachine: fix lightsleep while wifi is powered off
msc_disk: allow configuring the USB MSC inquiry response
README: fix name of RPI_PICO_W board
CMakeLists: enable debug symbols in all builds
implement time.time_ns with time_us_64 so it has us resolution

samd port:

modutime: use extmod version of time module
machine_pwm: add init() method to PWM and simplify the PWM code
mpconfigport: drop support for SoftSPI max speed
boards/MINISAM_M4: update pins.csv for the Mini SAM M4 board
rearrange the MCU-specific loader files
mcu/samd51: enable MICROPY_ENABLE_EMERGENCY_EXCEPTION_BUF
boards: add default deploy instructions
main: fix sercom deinit ordering in soft-reset
modmachine: add machine.deepsleep as alias of machine.lightsleep
modmachine: make some machine classes configurable by #defines
boards/SEEED_WIO_TERMINAL: rename two pins starting with a digit
mcu: reduce the startup time after hard reset
machine_uart: add support for UART hardware flow control
boards/ADAFRUIT_METRO_M4_EXPRESS: add Metro M4 Express Airlift
boards: rename flash pins consistently for QSPI and SPI
samd_spiflash: add SPI flash driver and configure it accordingly
samd_qspiflash: add QSPI flash driver and configure it accordingly
adapt existing samd.Flash and integrate with (Q)SPI flash in boot
boards: extend the code size limit for boards with external flash
set the LFS type in mpconfigmcu.mk instead of mpconfigboard.mk
Makefile: move the math lib files from mpconfigmcu.mk to Makefile
Makefile: print memory region usage instead of totals
mpconfigport: enable DHT and onewire drivers on all MCUs/boards
mpconfigport: provide the platform module
modules/_boot.py: add /lib to sys.path
mpconfigport: don't override parse chunk alloc

stm32 port:

modutime: use extmod version of time module
boards/ARDUINO_PORTENTA_H7: enable FDCAN
boards/stm32h723_af.csv: fix ADC AF definitions
mboot: fix alignment of packed final buffer
irq: fix typo in comment about priorities
usb: fix USB support on STM32G4
boards/NUCLEO_G474RE: make it easier to enable USB
adc: add support for STM32L4A6 MCUs
boards/NUCLEO_L4A6ZG: add new board definition
help: don't include unavailable features in help()
help: exclude legacy entries from help, and adjust constant names
mpconfigboard_common: provide default spidev config
boards: use default spibdev config where appropriate
Makefile: pass relevant CPU flags to assembler
make-stmconst.py: support structs with names ending in _t
main: start UART REPL as early as possible
usbd_conf: treat G0 USB periph as MICROPY_HW_USB_IS_MULTI_OTG=0
machine_adc: handle ADC resolution less than 8 bits on all MCUs
add initial support for H5 MCUs
boards: add ld, af.csv and hal_conf_base.h files for H5 MCUs
octospi: add preliminary support for OCTOSPI peripheral
boards/STM32H573I_DK: add H5 board definition files
add USB support for STM32L1 MCUs
modify RCC->APB2ENR directly instead of HAL API
modmachine: remove duplicate machine_timer_type declaration
modmachine: make machine_reset_cause_obj public
dac: fix dac.write_timed on G4 MCUs to use 32-bit DMA access
adc: fix ADC clock prescaler for G4 MCUs
adc: fix pyb.ADCAll.read_core_temp for G4 MCUs
adc: fix reading internal ADC channels on G4 MCUs
machine_adc: fix machine.ADC to work on G4 MCUs
adc: add workaround for ADC errata with G4 MCUs
adc: fix pyb.ADCAll.read_core_bat on G4 and L4 MCUs
qspi: allow qspi_write_cmd_data to write cmd with 1 data byte
mpconfigport: always define MICROPY_SOFT_TIMER_TICKS_MS
remove duplicate machine module from constants list
boards/B_L072Z_LRWAN1: add pin definitions for internal SX1262
boards/B_L072Z_LRWAN1: lower default ROM level to "Core"
spi: add STM32WL5 SUBGHZ SPI peripheral
powerctrlboot: support STM32WL system clock from HSE+PLL
dma: fix DMA completion on WL55 boards
subghz: add STM32WL55 subghz radio interface to stm module
modstm: add MICROPY_PY_STM_CONST flag, clear it for STM32WL5
use uppercase variant names
Makefile: append board variant to BUILD
mboot: fix fwupdate by replacing zlib with new deflate module
uart: fix UART timeout issue with low baudrate on G4 MCUs
timer: fix deadtime config on Advanced Timer peripherals
dma: add support for SPI1 DMA on H5 MCU's
octospi: add support for dual-line SPI interface
powerctrlboot: allow using PLL3 for USB clock on H5 MCU's
timer: fix use of TIM8 on H5 MCU's
uart: add support for UART10 when it's a USART
powerctrlboot: allow PLL1 Q and R outputs to be enabled on H5
adc: fix STM32H5 support
adc: add support for STM32H5 ADC2 inputs
adc: optimize sampling time for G4, H5, L4 and WB MCUs
machine_adc: fix and improve STM32H5 support
dac: add STM32H5 DAC support, with dma_nohal implementation
boards: move includes to after defines in all hal_conf.h files
uart: generalise UART source clock calculation for H5 and H7 MCUs
dma: remove unbalanced )
usbd_msc_interface: allow configuring the MSC inquiry response
boards/ARDUINO_GIGA: update board config
i2c: add support for I2C4 on H7 MCUs

teensy port: no changes specific to this component/port

unix port:

modutime: use extmod version of time module
Makefile: allow variants to add QSTR_DEFS
main: add NLR scope for checking module path
README: fix Markdown link markup
modsocket: add poll support for missing ERR,HUP,NVAL poll values
modselect: remove unix-specific implementation of select module
modjni: fix build errors with type definitions and error strings
main: fix memory leakage if MICROPY_USE_READLINE is disabled

webassembly port:

modutime: use extmod version of time module
make mp_js_do_str asynchronous
make mp_js_process_char asynchronous
replace typeof window check with ENVIRONMENT_IS_NODE flag

windows port:

Makefile: allow variants to add QSTR_DEFS

zephyr port:

modutime: use extmod version of time module

v1.20.0: New mip package manager, compressed type structs and Pico W support

2023-04-26T05:43:11Z

This release of MicroPython introduces a new lightweight package manager
called mip, which uses a custom protocol to query and install packages that
is optimised for embedded systems. It is intended to take over the role of
upip and supports installing packages from micropython-lib as well as any
URL. Mip can be run directly on a device (with network connectivity) or
via mpremote. As part of this, all pure-Python drivers have been moved
from the micropython repository to the micropython-lib repository, making
it easier to install the packages needed for a given project.

In the MicroPython runtime, core/built-in types have been compressed by
only including in the C-level type struct as many slots for C function
pointers as is needed for a given type (instead of storing NULL pointers
for unused slots). This resulted in a reduction of code size of many
kilobytes for all ports (eg around 1200 for bare-arm) with a very minimal
loss in performance. Any third-party C extensions will need to be updated
to work with this change. See commits
662b976 and
3ac8b58 for details.

The MicroPython VM/runtime has also seen many improvements and bug fixes,
including: addition of hex/fromhex methods to bytes/memoryview/bytearray,
dictionary union (PEP 584), support for float and complex
functions, support for dict on module objects and UTF-8 validation of
all strings. Whole number floats are now formatted exactly, and there have
been other accuracy improvements to parsing and formatting of floats.
A sub-version has been introduced for .mpy files which is used only when a
.mpy file includes native code, allowing the native ABI to change while
retaining backwards compatibility with pure bytecode .mpy files.
There is now an option to have the GC heap split across more than one pool
of memory, although this is not yet in use by the ports. And root pointer
registration has been simplified with the new MP_REGISTER_ROOT_POINTER
macro.

In the network module, the keyword arguments to scan(), connect() and
config() have been renamed to be more consistent across ports and drivers.
The changed argument names are: "essid" changed to "ssid", "auth" or
"authmode" changed to "security", and "password" changed to "key". The old
keyword arguments are still supported so this change is backwards
compatible. The functions network.hostname() and network.country() have
also been added and provide a standard interface across ports to set the
global networking configuration for all interfaces and interface types. In
particular, setting the hostname is now supported for all CYW43xx-based
boards (pyboard-D, Arduino Portenta, Pico W, and others).

The mbedtls (SSL library) settings have also been unified across ports that
use this library and enable elliptic curve DH and DSA cryptography enabled
so that devices can connect to more websites. The cert_reqs and cadata
arguments have also been implemented. Sockets now support leaving
multicast groups. WebREPL will now run the page from the device, allowing
WebREPL resources to load from a HTTPS site.

The bluetooth module has a minor breaking change for
IRQ_GATTC_CHARACTERISTIC_RESULT: def_handle has been replaced with
end_handle. This is not expected to affect most programs as def_handle is
unlikely to be used. See commit cacc96d.

The uasyncio module now supports stream read(-1), handles gather with no
awaitables, and adds a clear() method to ThreadSafeFlag. The framebuf
module adds ellipse and polygon drawing methods, and a fill argument to
rect() for consistency with those new methods.

A new port has been added, the "embed" port, which is a port of MicroPython
that targets the C language and outputs a set of self-contained .c and .h
files for embedding into a wider project. An example is provided to show
how this works.

The esp8266 port has reverse-special-methods enabled on the GENERIC board,
uart.flush() and uart.txdone() added, real open drain output enabled on
pins driven by PWM, and adds the ability to set TX power for the WLAN
interface.

The esp32 port now uses synchronous BLE events which allows support for BLE
pairing and bonding. The LAN driver adds support for LAN8710, KSZ8081,
configuration of ETH ref_clk pin, and support for SPI-based Ethernet chips.
UART now supports setting timeout_char and implements uart.flush() and
uart.txdone(). New boards include ESP32S3 with octal SPIRAM, Olimex PoE
boards and a generic board for unicore chips. There have also been many
bug fixes, in particular for newer MCU versions such as S2, S3 and C3.

The mimxrt port has seen a lot of clean up of the code, support for
MIMXRT1176 MCUs and the MIMXRT1170_EVK board, a soft-timer implementation
of machine.Timer, addition of machine.bootloader(), as well as uart.flush()
and uart.txdone().

On the nrf port, machine.UART and machine.PWM have been improved to match
other ports (the PWM change is a breaking change), and machine.I2C now
supports the freq argument. New boards include the Arduino Nano 33 BLE
sense board and the Seeed XIAO NRF52840 Sense.

The rp2 port sees the integration of the CYW43xx WiFi driver which is used
in the new Pico W board, a board similar to the Pico but with WiFi support.
Other new boards include W5500_EVB_PICO, WEACTSTUDIO and the nullbits Bit-C
PRO board. Support has been added for named pins, including Pin.board and
Pin.cpu attributes, consistent with other ports that support this feature.
The machine.lightsleep() function has been implemented, along with SSL
certificate time validation, and more accurate formulas are used to
determine PWM frequency and duty. The GC heap available to MicroPython
programs has been increased to use the maximum available free RAM, adding
about 20k to the user heap. There have also been important bug fixes to
threading and concurrency when using both cores.

The samd port has been significantly extended to include: named pins with
a pins.csv file, and Pin.board and Pin.cpu attributes; ADC, PWM, DAC,
SoftSPI, SoftI2C, SPI, I2C and RTC classes added to the machine module;
pin.irq() method and OPEN_DRAIN mode for pins; freq, disable_irq,
enable_irq, idle, lightsleep and time_pulse_us functions added to the
machine module. Floating point support has been added for SAMD21 devices,
and the math module enabled for SAMD51. A board definition for Sparkfun
Think Plus has been added.

The stm32 port sees support added for STM32L1xx MCUs, STM32H723, USB on
STM32G0xx and mboot support for STM32G0xx. The existing CYW43xx WiFi
driver has been replaced with the open-source version of cyw43-driver and
this has been integrated with all existing boards with CYW43xx chips.
Support for the CC3000 WiFi driver has been removed, and the Wiznet driver
integration has been reworked to use the generic one shared with other
ports (and also uses lib/wiznet5k instead of the old drivers/wiznet5k).
Hardware I2C implementation has been added for STM32L1xx and STM32L4xx,
support added for Arduino 1200bps touch to enter the bootloader (only on
Arduino boards), mbedtls (SSL) certificate time validation added, and
link-time-optimisation (LTO) enabled by default on boards with small flash
size. New board definitions include: LEGO Hub No. 7, NUCLEO-L152RE,
NUCLEO-F756ZG, NUCLEO-H723ZG, Arduino Nicla Vision and Arduino Giga H7.
Arduino boards also now include a range of frozen libraries including
senml.

For the unix and windows ports, build outputs (including executables) are
now kept inside the $(BUILD) directory associated with the build. As part
of this the variant suffix has been removed from the executable name. For
example, what was micropython-coverage is now build-coverage/micropython,
and the standard variant is build-standard/micropython. Furthermore, the
dev variant has been removed and its features enabled instead on the
standard variant, which now enables the same feature set as a typical
bare-metal board, making it more convenient to use for development. The
remaining variants are: minimal, standard, nanbox, coverage. The SSL
implementation for this port has switched from axtls to mbedtls, again to
match most bare-metal ports.

The javascript port has been renamed to the webassembly port, and adds
support for VFS and VfsPosix using Emscripten's POSIX filesystem layer.
The way stdout printing works has also changed to dispatch via a custom
event called "micropython-print".

The zephyr port upgraded Zephyr to v3.1.0, added custom configuration for
bbc_microbit_v2, and enabled finalisers.

The change in code size since the previous release for various ports is
(absolute and percentage change in the text section):

   bare-arm:   -1124  -1.934%
minimal x86:   -4322  -2.967%
   unix x64: +264181 +50.533% standard
      stm32:   -3592  -0.906% PYBV10
     cc3200:   -1832  -0.990%
    esp8266:   -2284  -0.327% GENERIC
      esp32:   +9659  +0.632% GENERIC
        nrf:     -84  -0.045% pca10040
        rp2:  +13096  +4.291% PICO
       samd: +127776 +90.488% ADAFRUIT_ITSYBITSY_M4_EXPRESS

The changes that dominate these numbers are:

bare-arm, minimal, stm32, cc3200, esp8266: reduced size due to compressed
type structs
unix: switching axtls for mbedtls, merging in dev configuration options
and features
esp32: new Ethernet drivers and some additional machine module
functionality
nrf: compressed type struct and machine module improvements
rp2: additional mbedtls features and ciphers
samd: many new features, and machine module classes and functions

Thanks to everyone who contributed to this release:
Alex Riesen, Andrew Leech, Andrew Scheller, Angus Gratton, Antonello
Margottini, Antonin ENFRUN, Ayke van Laethem, Blake Felt, brave ulysses,
Brian Cooke, Brian Pugh, Carlosgg, Chris Overgaauw, Chris Swan, Chris
Waggoner, chrismas9, Christian Clauss, Christian Walther, Clayton Cronk,
cpottle9, Dale Weber, Damiano Mazzella, Damien George, Damien Tournoud, Dan
Ellis, Daniel Jour, David (Pololu), David Grayson, David Lechner, David
Peake, David Yang, Dorukyum, Efi Weiss, enriquezgarc, Felix Dörre, Florian
Weimer, glenn20, hoihu, Howard Lovatt, iabdalkader, Ian Davies,
IcedRooibos, Ihor Nehrutsa, Jacob Siverskog, Jan Hrudka, Jan Willeke, Jared
Hancock, Jatty_, Jay Greco, Jeff Epler, Jeremy Rand, Jim Mussared, Jonas
Scharpf, Jos Verlinde, Juan Francisco Cantero Hurtado, Koen De
Vleeschauwer, Kyuchumimo, Lars Haulin, Laurens Valk, LiaoJingyi_winY7kp,
Luiz Brandao, ma-lalonde, manobendro, Maripo GODA, Mark Grosen, Martin
Milata, Mat Booth, Matt Trentini, Maureen Helm, Michael Bentley, Michael
Mogenson, MrJake222, Nathan Hendler, Ned Konz, Nicholas H.Tollervey, Oliver
Joos, omogenot, Patrick, Patrick Joy, Paul Grayson, Paul Warren, Pepijn de
Vos, Peter Harper, Peter Hinch, PGE, Phil Howard, Philip Peitsch, Philipp
Ebensberger, pmendham, Rayane Chatrieux, Red_M, Rob Knegjens, robert-hh,
Sebastian Romero, Simon Arlott, Sky, Stewart C. Russell, Stig Bjørlykke,
stijn, Stuart Langridge, Takeo Takahashi, Thorsten von Eicken, Tim Gates,
Tobias Thyrrestrup, Tomasz 'CeDeROM' CEDRO, Tomofumi Inoue, TPReal,
Trammell hudson, Wind-stormger, yn386, Yonatan Goldschmidt, 小权一句两句.

The work done in this release was funded in part through GitHub Sponsors,
by George Robotics, and by Planet Innovation.

What follows is a detailed list of changes, generated from the git commit
history, and organised into sections.

Main components

all:

fix paths to mpy-cross and micropython binaries
remove MICROPY_PY_IO_FILEIO config option
update all manifest.py files to use new features
simplify buffer protocol to just a "get buffer" callback
standardise mp_obj_type_t initialisation
make all mp_obj_type_t defs use MP_DEFINE_CONST_OBJ_TYPE
fix #if inside MP_DEFINE_CONST_OBJ_TYPE for msvc
remove unnecessary locals_dict cast
use += rather than = everywhere for CFLAGS/LDFLAGS/LIBS
keep msvc build output in build/ directories
fix Python comparison to None and True, and use "not in"
use micropython-lib unconditionally in manifests
replace upip with mip everywhere
update Python formatting to black "2023 stable style"
update copyright year range to include 2023

py core:

vm: change comparison for finally handler search from > to >=
emit: remove logic to detect last-emit-was-return-value
emit: suppress unreachable bytecode/native code that follows jump
objcell: make cell get/set funcs static-inline to reduce code size
parsenum: support parsing complex numbers of the form "a+bj"
parsenum: fix parsing of complex "j" and also "nanj", "infj"
parsenum: optimise when building with complex disabled
objclosure: forward function attributes for closures
objfun: support function attributes on native functions
builtin: remove unnecessary module declarations
builtinhelp: don't show help for an MP_MODULE_ATTR_DELEGATION_ENTRY
mkrules.cmake: improve printing of git-submodules error
scheduler: de-inline and fix race with pending exception / scheduler
vm: document internal SELECTIVE_EXC_IP option
emitnative: fix STORE_ATTR viper code-gen when value is not a pyobj
vm: remove check for ip being NULL when handling StopIteration
vm: in YIELD_FROM opcode, expand helper macros and remove them
vm: consistently indent #if guards to match the code they surround
objnamedtuple: fix segfault with empty namedtuple
misc: add MP_STATIC_ASSERT_NOT_MSC()
obj: add static safety checks to mp_obj_is_type()
obj: add debug-only runtime checks to mp_obj_is_type()
make_root_pointers: add MP_REGISTER_ROOT_POINTER parser/generator
mpstate: drop MICROPY_PORT_ROOT_POINTERS from mp_state_vm_t
persistentcode: use MP_REGISTER_ROOT_POINTER()
modsys: use MP_REGISTER_ROOT_POINTER()
scheduler: use MP_REGISTER_ROOT_POINTER()
misc: fix msvc compilation with compressed error messages
qstr: make mp_decompress_rom_string decl and def the same
gc: allow the GC heap to be split over multiple memory areas
gc: reduce code size when MICROPY_GC_SPLIT_HEAP is disabled
obj: add support for float and complex functions
obj: make mp_obj_get_complex_maybe call mp_obj_get_float_maybe first
compile: support large integers in inline-asm data directive
modio: remove FileIO and TextIOWrapper from io module
formatfloat: format all whole-number floats exactly
builtinimport: remove duplicate static function argument
mkenv.mk: use micropython-lib from submodule by default
runtime: fix crash in star arg unpacking
mpprint: fix formatting typo with mp_print_ext_t struct name
objstr: reformat str access macros to make them readable
mkrules.mk: keep all build artefacts inside $(BUILD) directory
dynruntime.mk: allow building assembly source in natmods
nlrpowerpc: fix generation of ppc64 code on ppc32 build
qstr: change qstr hash type from mp_uint_t to size_t
objstr: consolidate methods for str/bytes/bytearray/array
objstr: add hex/fromhex to bytes/memoryview/bytearray
objstr: remove str function object declarations from header file
mkrules: use abspath to find directory for mpy-cross dependency
parsenum: ensure that trailing zeros lead to identical results
formatfloat: use pow(10, e) instead of pos/neg_pow lookup tables
dynruntime: add mp_obj_is_true
clean up formatting of union definitions
builtinimport: allow overriding of mp_builtin___import__
objstr: split mp_obj_str_from_vstr into bytes/str versions
objstr: always ensure mp_obj_str_from_vstr is unicode-safe
objstr: optimise mp_obj_new_str_from_vstr for known-safe strings
objstr: always validate utf-8 for mp_obj_new_str
persistentcode: clarify ValueError when native emitter disabled
objpolyiter: add a new polyiter type with finaliser support
mpconfig: add LFS1/LFS2 options to match FAT/posix
mpconfig: make feature levels available to mpconfigport.h
mpconfig: add "everything" features from unix coverage
objpolyiter: fix comment about finaliser method
mkrules.mk: add link to build troubleshooting on failure
obj: add macro to declare ROM mp_obj_type_t instances
objexcept: make MP_DEFINE_EXCEPTION use MP_DEFINE_CONST_OBJ_TYPE
obj: add "full" and "empty" non-variable-length mp_obj_type_t
obj: add accessors for type slots and use everywhere
obj: add slot-index mp_obj_type_t representation
obj: remove basic mp_obj_type_t sparse representation
objtype: optimise slot RAM usage for instance types
objnamedtuple: optimise slot RAM usage for namedtuple
obj: merge getiter and iternext mp_obj_type_t slots
obj: convert make_new into a mp_obj_type_t slot
obj: optimise code size and performance for make_new as a slot
persistentcode: introduce .mpy sub-version
objmodule: add support for dict
runtime: add mp_raise_OSError_with_filename helper function
include filename in errors from loading/saving files via "open"
parse: allow const types other than int to optimise as true/false
objstr: don't treat bytes as unicode in str.count
mkenv.mk: make CPP definition explicit for consistency
objstr: add a helper to set mp_obj_str_t data
modsys: add support for sys.executable
py.mk: make user-C-module handling self-contained in py.mk
misc: remove use of bitfield from vstr_t
obj: verify floating point type is correct for repr C
persistentcode: only emit sub-version if generated code has native
obj: add comments explaining the slot index scheme
makeversionhdr: fall back to py/mpconfig.h instead of docs/conf.py
builtinimport: fix crash handling "weak link" module names
objarray: detect bytearray(str) without an encoding
emitnative: ensure load_subscr does not clobber existing REG_ARG_2
nlrmips: add native NLR support for MIPS architecture
makeversionhdr.py: allow running outside of repo
objdict: implement dictionary union (PEP 584)
bc: fix checking for duplicate **kwargs
modmicropython: make module optional
mpconfig: include micropython module in core features
remove the word "yet" from exception messages
pass in address to compiled module instead of returning it
gc: avoid valgrind false positives
gc: ensure a gap of one byte after the ATB
gc: fix debug printing of GC layout
obj: remove unused MP_DEFINE_CONST_OBJ_FULL_TYPE macro
emitnative: initialise locals as Python object type for native code
map: clear value when re-using slot with ordered dictionaries
gc: increase the address length in gc_dump_alloc_table()
objarray: raise error on out-of-bound memoryview slice start
lexer: wrap in parenthesis all f-string arguments passed to format
add parenthesis to default impl of MP_OBJ_TO_PTR, MP_OBJ_FROM_PTR
objint_mpz: catch and reject @ and @= operating on big integers
mkrules: support mpy-tool-flags in cmake frozen code generation
mkrules.cmake: force build mpversion.h and frozen_content.c
modmath: fix two-argument math function domain check
emitnative: explicitly compare comparison ops in binary_op emitter
makeversionhdr.py: optionally get git tag and git hash from env vars
compile: fix scope of assignment expression target in comprehensions
gc: make gc_dump_info/gc_dump_alloc_table take a printer as argument
mpconfig: provide config option for internal printf printer
builtinimport: fix unix port build with external imports disabled
makeversionhdr.py: always add micro to version string even if it's 0
obj: add MP_NOINLINE to mp_obj_malloc_helper
mpstate: add mp_thread_is_main_thread() helper macro
scheduler: implement VM abort flag and mp_sched_vm_abort()
obj: fix spelling of staticmethod
makeqstrdefs.py: fix handling GreenHills C/C++ preprocessor output

extmod:

network_cyw43: rename WLAN keyword args to ssid/security/key
network_ninaw10: rename WLAN connect argument from essid to ssid
modlwip: clean up inclusion of modlwip in build process
extmod.cmake: only include modbtree in build if it's enabled
extmod.mk: separate out extmod file list from py.mk to extmod.mk
modbtree: use buffer protocol for keys/values
uasyncio: attempt to write immediately in Stream.write method
uasyncio: implement stream read(-1) to read all data up to EOF
vfs: prevent uninitialized variable warning for path_out
network_cyw43: support new cyw43-driver
modnetwork: include cyw43-driver header if it's enabled
network_cyw43: add "security" config option to get/set auth mode
btstack: use MP_REGISTER_ROOT_POINTER()
nimble: use MP_REGISTER_ROOT_POINTER()
modnetwork: use MP_REGISTER_ROOT_POINTER()
uos_dupterm: use MP_REGISTER_ROOT_POINTER()
modlwip: use MP_REGISTER_ROOT_POINTER()
vfs: use MP_REGISTER_ROOT_POINTER()
modbluetooth: use MP_REGISTER_ROOT_POINTER()
always use custom mbedtls error message code
modussl_mbedtls: implement cert_reqs and cadata arguments
btstack: fix descriptor discovery handle range and events
network_ninaw10: move ninaw10 root pointer registrations here
modbluetooth: add support for running sync irq on system thread
webrepl: allow the page to run from the device (over HTTP)
uasyncio: handle gather with no awaitables
ntptime: factor out ntptime module from esp8266 port
modussl_mbedtls: set a more sensible default debug log level
network_cyw43: add hostname config option
network_wiznet5k: register NIC when the lwIP stack is used
network_wiznet5k: drop obsolete argument count check
network_wiznet5k: deinit the NIC before (re-)initialisation
network_wiznet5k: schedule clearing of interrupt flags
network_wiznet5k: rearrange the function wiznet5k_poll()
network_wiznet5k: extract SPI transfer function dynamically
uasyncio: add clear method to ThreadSafeFlag
uasyncio: rename internal _flag to state, to save a qstr
modlwip: add support for leaving multicast groups
vfs_posix_file: remove unused MICROPY_VFS_POSIX_FILE
modframebuf: optimise argument handling
modframebuf: add fill argument to rect()
modframebuf: add ellipse drawing method
modframebuf: add polygon drawing methods
modframebuf: improve poly-fill boundary pixels
network_wiznet5k: use the configured DNS address if available
machine_i2c: call MICROPY_PY_EVENT_HOOK during i2c.scan()
modure: convert byte offsets to unicode indices when necessary
modbluetooth: fix descriptor registration with empty tuple
modbluetooth: replace def_handle with end_handle in char IRQ
vfs: add finaliser to ilistdir to close directory handle
vfs_posix_file: implement finaliser for files
modbluetooth: change data_len type from size_t to uint16_t
modbluetooth: do GATTC reassembly in protected uPy context
modbluetooth: run BLE IRQ callback in protected NLR context
extmod.mk: make extmod.mk handle GIT_SUBMODULES
make extmod.mk self-contained
utime_mphal: make ticks_add check for overflow of delta
btstack: update BTstack bindings to work with latest BTstack
mbedtls: add common configuration file, and use it in all ports
mbedtls: enable MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_KEY_EXCHANGE
mbedtls: enable elliptic curve DH and DSA cryptography
mbedtls: remove MBEDTLS_ECP_DP_CURVE25519_ENABLED config
mbedtls: remove brainpool curves from config
machine_timer: move stm32's implementation of machine.Timer here
vfs_posix: include errno.h and unistd.h headers
extmod.cmake: allow overriding the default MBEDTLS_CONFIG_FILE
modlwip: use actual errno in exception for error in listen
extmod.mk: set default mbedtls config file in extmod Makefile
btstack: allow the BTstack config to be overridden by a board
add and reorganise compilation guards and includes
extmod.cmake: add MICROPY_PY_BTREE compiler definition
moduplatform: remove _M_IX86 test for xtensa
moduplatform: fix MSVC x86_64 check
modframebuf: fix crash in FrameBuffer scrolling beyond extents
uasyncio: fix syntax of generator functions
modnetwork: use a type protocol to implement NIC functions
modussl_mbedtls: fix support for ioctl(MP_STREAM_POLL)
network_cyw43: fix handling of networks with open security
axtls-include: add back needed header files for building axTLS
utime_mphal: fix comment re delta range check in time_ticks_add
modbtree: move system includes within MICROPY_PY_BTREE guard
modnetwork: add network.hostname() and network.country()
modnetwork: allow more extensive port-specific customisation
network_cyw43: use CYW43_CHANNEL_NONE for default arg in connect
vfs_posix: do not filter '..*' in ilistdir when filtering '..'
network_ninaw10: check socket types when creating new sockets
network_cyw43: fix setting hostname using config() method
network_cyw43: add support to get STA RSSI using status() method
network_ninaw10: add missing raw socket type to socket()
btstack: switch to use hci_dump_init instead of hci_dump_open
modbluetooth: merge gatts_notify/indicate implementation
btstack: fix indicate/notify queuing
btstack: include value handle in client read/write events
btstack: fix MTU handling
btstack: add support for CCCD to allow client subscriptions
nimble: fix flags for descriptor registration
modbluetooth: make all HCI transports trace in the same format
btstack/modbluetooth_btstack: add default services

shared:

runtime/tinyusb_helpers: add TinyUSB helper functions
netutils/dhcpserver: match default DNS to server IP
readline: use MP_REGISTER_ROOT_POINTER()
runtime/pyexec: use MP_REGISTER_ROOT_POINTER()
runtime/softtimer: move softtimer.[ch] to shared/runtime
runtime/softtimer: remove obsolete #include statement
runtime/sys_stdio_mphal: make func static and remove some TODOs
runtime/gchelper_native: fix pointer cast on x86_64
netutils: add "py/obj.h" header include
tinyusb: create common TinyUSB code for reuse by ports
tinyusb: further refactor static USB device implementation
tinyusb: fix CDC bNumInterfaces value
runtime: use mp_printf consistently, instead of printf
runtime/gchelper: drop cpu directive from ARM asm helpers
runtime/softtimer: use consistently the same clock source
runtime/softtimer: fix ticks range when computing ticks diff
tinyusb: allow max USB descriptor string to be configured
runtime/pyexec: don't allow Ctrl+C to interrupt frozen boot code
tinyusb: revert setting of CFG_TUD_CDC_EP_BUFSIZE to 256

drivers:

hts221: add HTS221 humidity sensor driver
lsm9ds1: add LSM9DS1 IMU driver
lps22h: add LPS22HB/HH pressure sensor driver
lps22h: use machine.idle for power saving
ninaw10/nina_wifi_bsp: use MP_REGISTER_ROOT_POINTER()
fix a few typos in comments
cyw43: allow configuring the netif/mDNS hostname
sdcard: add delay in init_card_v1 to make timeout work
wiznet5k: remove old Wiznet driver
cc3000: remove CC3000 WiFi driver files
display: don't include tests by default
remove drivers that are now in micropython-lib
ninaw10: connect to WiFi asynchronously
bus: detect QSPI transfer errors and pass up to spiflash driver
bus: change QSPI read_cmd signature to return an error code
ninaw10: implement machine.Pin external pin controls
cyw43: use board-defined BLE UART secondary baudrate
cyw43: use a different baudrate for BT firmware download
ninaw10: fix machine_pin GPIO read
cyw43: include CYW43 config file
ninaw10: add missing external pins 34 and 39
ninaw10: fix ESP32 input-only pins

mpy-cross:

Makefile: respect existing CFLAGS and LDFLAGS
remove .gitignore file
include alloca.h for NetBSD
mpy_cross: add Python wrapper for mpy-cross
mpy_cross: fix default path to mpy-cross binary
mpy_cross: add a way to query the mpy version
mpy_cross: add list of architectures to __all__
mpy_cross: add docstrings to public methods
main: don't set a default native architecture
main: add MSVC-compatible architecture checks
force forward slashes in paths
main: fix return type of mp_import_stat

lib:

cyw43-driver: add new submodule for CYW43xx WiFi driver
pico-sdk: update to version 1.4.0
cyw43-driver: update cyw43-driver to fix ap_auth mode setting
tinyusb: update to the most recent master
cyw43-driver: update driver to latest version
micropython-lib: add micropython-lib as a submodule
lwip: update lwIP to v2.1.3, tag STABLE-2_1_3_RELEASE
micropython-lib: update to latest version with manifest changes
micropython-lib: update submodule to latest
stm32lib: update library to get L1 v1.10.3, and some other fixes
micropython-lib: update submodule to latest
btstack: update to v1.5.3
micropython-lib: update submodule to latest
libm: use asm instead of asm
btstack: update to v1.5.4
cyw43-driver: update driver to latest version
re1.5: reduce code size when checking for named class char
re1.5: add support for named classes in class sets
micropython-lib: update submodule to latest
cyw43-driver: update driver to latest version
pico-sdk: update to version 1.5.0
cyw43-driver: update driver to latest version v0.9.0
micropython-lib: update submodule to latest
stm32lib: update library to get H7 v1.11.0
cyw43-driver: update driver to latest version v1.0.0
micropython-lib: update submodule to latest

Support components

docs:

update to use new WLAN argument names for ssid/security/key
library/pyb.Timer: document brk argument and its constants
library: remove unnecessary "pyb." prefix on class names
set LaTeX engine to XeLaTeX for PDF generation
library/machine: add note on interrupts being critical to system
library/uasyncio: consistently use "uasyncio" instead of "asyncio"
library/bluetooth: add link to aioble
library/neopixel: add note that neopixel is included in rp2 builds
library/time: provide more info about which epoch is used
library/pyb.Pin: fix out-of-context paragraphs, and AF_PP typo
library/pyb.Pin: add Pin.ALT constant
library/pyb.Timer: document how to use BKIN pin with example
update links for Arm GCC toolchain
library/rp2: fix pull_thresh docs to use pull instead of push
esp32: fix string quoting consistency in SDCard mount example
update CPython differences and improve the look of table layouts
esp32: update UART quickref on input-only pins
library/machine.UART: add notes about UART init and deinit
library: fix nested rst styles not rendering
library/micropython: fix spelling of compiler
templates/topindex.html: update forum link
library/machine.I2C: add a note about I2C pull-up resistors
library/machine.UART: add docs for uart.flush() and uart.txdone()
renesas-ra: add pin drive keyword argument description
Makefile: enable parallel compilation for Sphinx
templates/layout.html: indicate latest vs release docs
samd: add documentation for the samd port
library/machine: add machine.memX to docs with brief example
samd/pinout: fix the pin numbering for the default assignments
develop: fix mp_compile snippet to match latest code
renesas-ra: correct the internal file system size of EK-RA6M2
library/array: add docs for dunder methods
library/pyb.CAN: update the recv example to take a 5-tuple
library/uasyncio: describe restriction on ThreadSafeFlag
library/framebuf: clarify docs for blit regarding palette
library/struct: fix buffer argument description
library/struct: embed format tables
library/neopixel: update GitHub URL for neopixel.py link
differences: update Python 3.9 status
differences: add Python 3.10 page
rp2: make LED have exactly 50% duty cycle in PIO 1Hz example
library/rp2.StateMachine: expand put() documentation
library/socket: use correct sockaddr variable name
esp32/quickref: add docs for the LAN interface constructor
library/machine.Timer: add freq argument to machine.Timer
reference/constrained: add missing heap-dump symbols to mem_info()
zephyr/quickref: fix zsensor module usage examples
library/network: update docs for network.country, network.hostname

examples:

embedding: remove obsolete axtls build target
usercmodule: add example of a native C class
embedding: rework example to use ports/embed
rp2: add comment that examples using IO25 don't work on Pico W
bluetooth: fix check for _conn_handle being None
usercmodule/cexample: use mp_obj_malloc()
bluetooth/ble_temperature_central.py: remove service tuple

tests:

extmod: add heap-lock test for stream writing
basics: add tests for name and globals attrs on closures
perf_bench: add some configurations for N=32, M=10
add an explanation of run-perfbench.py
fix run-perfbench parsing "no matching params" case
micropython: add test for builtin execfile() function
extmod/ussl_basic: make test run on axtls and mbedtls
cpydiff: fix formatting of code snippet to use double quotes
run-tests.py: provide better default MPYCROSS value for Windows
extmod/ubinascii: add tests for bytes.hex etc
update path to unix micropython executable
unicode: add test for invalid utf-8 file contents
renesas-ra: update pin test to support all boards
extmod/uasyncio_heaplock.py: force SKIP on stackless
frozen: move frozentest.mpy from ports/ to tests/
run-multitests: extend usage information
run-multitests: make paths more deterministic
allow 'special' tests to output "SKIP" on a single line
extmod: add test for sleep_ms value that overflows ticks
run-perfbench: support --heapsize argument and pass to executable
basics: add exp file for builtin_str_hex test
run-tests.py: use host arch for mpy-cross for target=unix
misc: add test for cexample module
misc/cexample_module: test class presence
misc/cexample_class: fix timing sensitivity
extmod/framebuf_scroll: add tests for FrameBuffer scrolling
unix/mod_os: add test for os module
extmod/ure_namedclass: add tests for named classes in class sets
float: skip new complex tests if complex unavailable
extmod: get DecompIO test running on low-memory targets
extmod: skip vfs tests if target doesn't have enough memory
micropython: split viper_misc test into two files
float: add domain checks for log and also -inf
float: make output of math function tests more readable
run-multitests.py: add ability to test instance over reboot
multi_bluetooth: add bluetooth multi-test for deepsleep
run-multitests.py: support outputting test metrics
multi_bluetooth: use multitest.output_metric in BLE perf tests
extmod/vfs_fat_ilistdir_del.py: use 512-byte erase block size
multi_bluetooth: use time.sleep_ms instead of time.sleep
multi_bluetooth/ble_mtu: split peripheral/central-initiated
multi_bluetooth/ble_subscribe: use end_handle in desc discovery
multi_bluetooth: add test for descriptors
multi_bluetooth/ble_characteristic.py: add write-no-response
multi_bluetooth: use multitest.broadcast instead of sleep

tools:

metrics.py: add mimxrt and renesas-ra to list of available ports
ci.sh: drop ppa requirement for code formatting CI
pyboard.py: add verbose option to filesystem_command
mpremote: don't be verbose when using cat command
autobuild: add nrf port to autobuild scripts
ci.sh: initialise submodules for more ports
ci.sh: force mpy-cross build for samd and teensy
update path to unix micropython executable
mpremote: allow + terminator for fs commands
pyboard.py: add "touch" filesystem command
mpremote: add "edit" command
ci.sh: split the stm32 builds for wiznet5k and cc3k
mpremote: print a nicer error when a filesystem command fails
pyboard.py: remove implicit fs_put if source starts with ./
pyboard.py: add fs_cp function for direct device-to-device copy
mpremote: print nicer errors for unsupported 'cp -r' arguments
manifestfile.py: add library for working with manifests
makemanifest.py: update to use mpy_cross module
manifestfile.py: allow include of directory path
manifestfile.py: allow require() to specify unix packages
manifestfile.py: allow manifests to set metadata
autobuild: use distinct directory for building stm32 variants
makemanifest.py: force the repo version of the mpy_cross package
pyboard.py: support Windows pathname separators
manifestfile.py: add author kwarg to metadata()
manifestfile.py: replace recursive glob with os.walk
mpremote: simplify dispatch of commands
mpremote: use argparse for command line parsing
mpremote: add mpremote mip install to install packages
pyboard.py: handle unsupported fs command
add note about uncrustify versions
add pre-commit support
mpremote: fix argument handling for follow and add help strings
mpremote: bump version to 0.4.0
verifygitlog.py: ignore comment lines in commit messages
verifygitlog.py: add additional help for subject line issues
mpremote: handle FileNotFound exceptions in listdir
mpremote: make RemoteFile objects iterable
makemanifest.py: fix printing of mpy_cross.CrossCompileError
gen-cpydiff.py: use os.path.join and os.path.isdir
gendoc.py: remove unused script
ci.sh: add ARDUINO_NANO_RP2040_CONNECT to rp2 CI build
ci.sh: remove one build from zephyr CI to speed it up
ci.sh: don't print python2 version
mpremote: allow EDITOR environment variable to work on Windows
mpremote: only auto connect to serial device with USB VID/PID
autobuild: create .uf2 file for seeed_xiao_nrf52
pyboard.py: fix Python 2 compatibility
pyboard.py: add parse kwarg to eval
pyboard.py: add fs_{listdir,readfile,writefile,stat}
pyboard.py: set DTR on Windows to avoid ESPxx hard reset
mpy-tool.py: initialize line_info_top
ci.sh: install pkg-config for macos builds
ci.sh: add unix, stm32 and rp2 ports to code size check
mpremote: use hatch to build mpremote package
pyboard.py: use '/' exclusively when dealing with paths
pyboard.py: fix joining of path in filesystem_command
pyboard.py: fix ESPxx boards hanging in bootloader after reset
manifestfile.py: add support for publishing packages to PyPI
mpremote: add ctrl-x as additonal mpremote disconnect shortcut

CI:

ISSUE_TEMPLATE: make minor improvements to placeholder text
ISSUE_TEMPLATE: replace forum with Discussions
workflows: print test failures for webassembly workflow
workflows: bump actions/checkout to v3
add dependabot to update GitHub Actions
workflows: bump codecov/codecov-action from 1 to 3
workflows: bump actions/setup-python from 1 or 2 to 4
workflows: run unix port workflow if mpy-cross changes
workflows: use ubuntu-20.04 when python2 is required
workflows: run mpy-format CI when tests and examples change
workflows: comment on code size change instead of failing CI
workflows: fix code size comment workflow for non-PR
workflows: cancel when branch is updated
workflows: update existing comments for code_size_comment
workflows/code_size: print code size change
workflows: add "shared/**" to list of paths that trigger CI
workflows: add workflow to build mpremote wheel
workflows: bump actions/setup-python from 1 to 4
workflows: bump actions/checkout from 2 to 3
workflows: bump actions/upload-artifact from 2 to 3

The ports

all ports:

adapt mimxrt, nrf and rp2 ports to work with latest TinyUSB
fix a few typos in comments
remove unused mp_type_{fileio/textio} macros in mpconfigport.h
always include debug information in the ELF
always append to GIT_SUBMODULES
use micropython-lib version of drivers in manifests
make generated pin.c handling more consistent across ports
make all network-capable boards use bundle-networking
make BOARD default from BOARD_DIR in Makefile's
rename remaining "Micro Python" to "MicroPython"
fix MCU tags in Arduino board.json files
implement simple write polling for stdout

bare-arm port: no changes specific to this component/port

cc3200 port:

mpconfigport: remove mp_const_user_interrupt
use MP_REGISTER_ROOT_POINTER()
fix various array-based compiler warnings
mods/pybuart: implement uart.flush() and uart.txdone()
remove unused NIC type customisation

embed port:

add new "embed" port which builds a simple C package
fix arguments to mp_raw_code_load_mem

esp8266 port:

modnetwork: rename WLAN keyword args to ssid/security/key
mpconfigport: switch to ROM feature level configuration
mpconfigport: disable MICROPY_PY_UTIMEQ
rename WLAN dhcp_hostname config to hostname
boards: enable reverse-special-methods on GENERIC board
use MP_REGISTER_ROOT_POINTER()
modnetwork: add support for WLAN.config(protocol=XX) option
README: update build instructions to match ci.sh
machine_uart: implement uart.flush() and uart.txdone()
modmachine: move dht_readinto() to the machine module
machine_pwm: enable real open drain output on pin driven by PWM
machine_pin: disable open drain when pin becomes input/output
modnetwork: add ability to set tx power for WLAN interface
README: remove notice about port being "experimental"
use extmod/modnetwork.c instead of port-specific version

esp32 port:

network_wlan: rename WLAN keyword args to ssid/security/key
machine_uart: implement the functionality of timeout_char arg
boards: increase 512 bytes limit on ULP programs to 2040
modesp32: add wake_on_ulp() so ULP can wake CPU from deepsleep
network_wlan: don't raise exception when scan returns no results
rename WLAN dhcp_hostname config to hostname
modmachine: fix machine.freq to allow maximum 160MHz on ESP32-C3
use MP_REGISTER_ROOT_POINTER()
mpconfigport: enable BLE synchronous events and pairing/bonding
Makefile: force micropython-lib as a required submodule
network_wlan: use esp_wifi_set/get_channel to config wifi channel
network_wlan: add support to set/get the wifi protocol
modnetwork: add network.MODE_LR constant
machine_uart: change sendbreak time to be at least 15 bit times
machine_timer: support all init arguments in Timer constructor
boards: merge manifest_release modules into standard manifest
machine_sdcard: free SPI bus when deiniting SD card
machine_uart: implement uart.flush() and uart.txdone()
mphalport: fix calculation of large sleep by using 64-bit arith
Makefile: add link to build troubleshooting on failure
modsocket: use mp_obj_is_integer to test port type
machine_pwm: don't use LEDC_USE_REF_TICK on ESP32-C3 variants
machine_i2s: add I2S finaliser which calls deinit()
machine_hw_spi: use auto DMA channel on S2, S3, C3 chips
rename machine I2C and SPI types consistently across ports
machine_i2c: fix clocks and timeouts for ESP32-C3, ESP32-S3
machine_pin: fix size of machine_pin_irq_handler array
machine_pwm: verify PWM is active when config methods are called
add 32MiB partition table templates
usb: add a timeout to usb_tx_strn()
modmachine: move dht_readinto() to the machine module
boards/GENERIC_S3_SPIRAM: enable BLE support
boards/GENERIC_S3_SPIRAM: enable BLE
machine_timer: fix ESP32C3 timer period doubling
machine_touchpad: fix TouchPad for ESP32S2, ESP32S3
main: don't call usocket_events_deinit if unavailable
usb: cleanup connection detection
boards/GENERIC_S3_SPIRAM_OCT: add ESP32S3 board with Octal SPIRAM
network_lan: add support for LAN8710 PHY
network_lan: support configuration of ETH ref_clk pin
network_lan: add support for SPI-based ethernet chips
network_lan: fix setting MAC address of ethernet devices
network_lan: fix compilation on IDF lower than v4.4
machine_sdcard: change dma_channel to SPI_DMA_CH_AUTO for ESP32S3
boards: add board definition for Olimex ESP32 PoE boards
boards/GENERIC_UNICORE: add board definition for unicore chips
network_lan: add support for Ethernet PHY KSZ8081
add a small delay before leaving wlan.active()
boards/OLIMEX_ESP32_POE: remove id from and update board.json
Makefile: allow specifying BOARD_DIR on make command line
use extmod/modnetwork.c instead of port-specific version
machine_pin: use const for size of machine_pin_irq_handler array
esp32_rmt: fix looping behaviour for RMT on ESP32-S3

mimxrt port:

Makefile: refactor Makefile and divide it into sections
Makefile: modify handling of SDRAM option
Makefile: modify handling of SDCARD option
Makefile: rework board flash type handling
Makefile: rework floating point config
Makefile: fix some minor formatting inconsistencies
boards: remove conditional assignment of flash type/size
use MP_REGISTER_ROOT_POINTER()
machine_uart: implement uart.flush() and uart.txdone()
machine_uart: drop a few commented lines about TX ring buffer
format the firmware image to match the new teensy loader
machine_spi: allow a setting of -1 for cs in the constructor
machine_uart: set the UART ioctl write poll flag properly
machine_uart: fix a bug in UART.write()
Makefile: split up SRC_C variables
machine_pin: add the Pin.toggle() method
fix CPU freeze when calling __WFE() in MICROPY_EVENT_POLL_HOOK
machine_timer: use soft-timer implementation for machine.Timer
machine_timer: use extmod version of machine.Timer
mphalport: add a timeout to mp_hal_stdout_tx_strn()
modmachine: move dht_readinto() to the machine module
add support for MIMXRT1176 MCUs, and MIMXRT1170_EVK board
README: add build and flashing instructions
usb: change macro name MICROPY_HW_USB_STR_MANUF
network: rename the argument clock_mode to ref_clk_mode
Makefile: set MPY_CROSS_FLAGS
mpconfigport: remove config options that are set by default
machine_rtc: set the microsecond value to 0
sdcard: fix an error when writing large blocks
sdcard: remove obsolete code already excluded by preprocessor
set MICROPY_GC_STACK_ENTRY_TYPE to uint32_t for large RAM
Makefile: move the FROZEN_MANIFEST setting after board config
enable ROM text compression
pendsv: add MICROPY_BOARD_PENDSV_ENTRIES for board customisation
pendsv: clean up PendSV code
Makefile: fix internal flash configuration and build
boards/MIMXRT1064_EVK: fix board config to use internal flash
mpconfigport: allow configuring different network interfaces
modmachine: implement machine.bootloader()
fix the build for boards without ROM API

minimal port:

Makefile: avoid terminal reset, use BUILD variable
Makefile: set linker to $(CC)
increase heap size for Linux builds

nrf port:

main: add startup and early-init board hook macros
modmachine: add machine.bootloader() and make it customisable
enable optional support for Arduino 1200bps touch
Makefile: drop unused MPY_CROSS and MPY_TOOL variables
boards/arduino_nano_33_ble: add Arduino Nano 33 BLE sense board
modmachine: add machine.idle() function
mpconfigport: remove obsolete module declarations
drivers/bluetooth: handle PHY_UPDATE messages, used in Bluetooth 5
drivers/usb: probe for interrupt char in USB CDC task
drivers/usb: add a tud_cdc_rx_cb() callback to check interrupt char
mpconfigport: call tud_task() in MICROPY_EVENT_POLL_HOOK
drivers/usb: fix reading of a single USB CDC character
use MP_REGISTER_ROOT_POINTER()
boards/arduino_nano_33_ble_sense: update deploy instructions
main: call usb_cdc_init() before executing boot.py and main.py
modules/ubluepy: use mp_obj_str_get_data to extract str data
don't enable debug info by default if LTO is on
modules/machine/uart: implement uart.flush() and uart.txdone()
Makefile: split up SRC_C variables
rename machine I2C, PWM, SPI, UART types consistently across ports
rename MICROPY_PY_MACHINE_TIMER to MICROPY_PY_MACHINE_TIMER_NRF
boards/seeed_xiao_nrf52: add defn for Seeed XIAO NRF52840 Sense
mpconfigport: enable seeding of the PRNG by the hardware RNG
Makefile: add support for BOSSAC flasher
boards/arduino_nano_33_ble_sense: add support for REV-2 chipset
modules/machine/pwm: add paramter checks and error messages
modules/machine/pwm: use extmod/machine_pwm.c for PWM module
modules/machine/soft_pwm: add PWM for nrf51x boards using soft PWM
modules/machine/pwm: support using all 4 channels of a PWM module
modules/machine/uart: add timeout keyword options and "any" method
nrfx_config: use the UARTE definitions and drivers for the NRF52xx
modules/machine: use a dedicated function for machine.idle()
modules/machine: support the freq=n argument for machine.I2C
modules/machine/pwm: fix resource conflict, and change id to device
nrfx_config: use UARTE for nrf52xxx devices
modules/machine/uart: prevent UART lock-up after a receive error

pic16bit port:

pic16bit_mphal: use MP_REGISTER_ROOT_POINTER()

powerpc port: no changes specific to this component/port

qemu-arm port: no changes specific to this component/port

renesas-ra port:

modmachine: allow boards to provide custom bootloader code
machine_i2c: remove unnecessary start/stop dummy functions
mpconfigport: drop pyb_hid_report_desc root pointer
use MP_REGISTER_ROOT_POINTER()
softtimer: switch to use softtimer code from shared/runtime
machine_pin: support drive keyword and fix GPIO setting
rename machine SPI type consistently across ports
machine_timer: use extmod version of machine.Timer
boards: update linker script to detect code flash overflow
disable debugging option for RA4 to reduce code size
change file system size to 64KB for RA6M1
add the UART methods uart.txdone() and uart.flush()

rp2 port:

modmachine: allow boards to provide custom bootloader code
boards/ARDUINO_NANO_RP2040_CONNECT: enable Arduino 1200bps touch
modmachine: implement lightsleep() with optional sleep period
mpthreadport: ensure core1 doesn't hold gc lock in deinit
mbedtls: enable some more mbedtls options
lwip_inc: enable lwIP status callback
rp2_flash: add asserts for size of flash filesystem partition
mpnetworkport: convert network task scheduling to use PendSV IRQ
integrate CYW43xx WiFi driver
boards/PICO_W: add new Pico W board, an RP2040 with WiFi
boards/GARATRONIC_PYBSTICK26_RP2040: change pico-sdk board name
main: set default AP auth mode to WPA2_AES_PSK
mpconfigport: factor core event handling to EVENT_POLL_HOOK_FAST
Makefile: regenerate cmake if generated Makefile missing
CMakeLists: give error if required submodules are missing
CMakeLists: don't override cyw43-driver unless necessary
boards/ARDUINO_NANO_RP2040_CONNECT: add urequests module
run USB stack task exclusively from core 0
make atomic sections suspend the other core (if active)
mpconfigport: make networking options consistent across boards
mphalport: fix missing storage_read_blocks symbol in debug build
CMakeLists: use armv6m mpy-cross arch for rp2
use MP_REGISTER_ROOT_POINTER()
mpbthciport: remove mp_bthci_uart from set of root pointers
cyw43_configport: set CYW43_EVENT_POLL_HOOK value
cyw43_configport: set CYW43_WIFI_NVRAM_INCLUDE_FILE value
rp2_pio: fix StateMachine.restart when PIO program is shared
cyw43_configport: add event hook into cyw43_delay_ms
Makefile: always use cmake to discover submodules
mbedtls: enable certificate validity time validation
machine_spi: add mp_hal_get_spi_obj helper function
boards/W5500_EVB_PICO: add new board definition for W5500_EVB_PICO
mark gc_heap NOLOAD for faster boot
correctly determine path to arm-none-eabi-size
machine_wdt: check for the maximum timeout value of watchdog
machine_uart: implement uart.flush() and uart.txdone()
mbedtls: fix missing time.h include
rp2_flash: add start/len support to rp2.Flash() constructor
boards: set PICO_BOARD correctly for each board
machine_spi: use pico-sdk's default pins for SPI
machine_i2c: use pico-sdk's default pins for I2C
boards: remove all I2C,SPI pin defs that already match pico-sdk
Makefile: add link to build troubleshooting on failure
Makefile: add support for BOARD_VARIANTS
boards/WEACTSTUDIO: add WEACTSTUDIO with multiple variants
fatfs_port: fix the modification date of files
rename machine I2C type consistently across ports
mphalport: add a timeout to mp_hal_stdout_tx_strn()
cyw43_configport: make sure only core0 executes a __WFI()
modmachine: move dht_readinto() to the machine module
allow enabling USB device without enabling USB-CDC
boards/ARDUINO_NANO_RP2040: add more modules and enable MD5 hash
fix lightsleep to work with interrupts and cyw43 driver
machine_pwm: use more accurate formulas for freq and duty_u16
machine_pwm: fix overflows with freq > 268 MHz
mphalport: change order of pin operations to prevent glitches
rp2_flash: call MICROPY_EVENT_POLL_HOOK_FAST after reading flash
machine_pin: refactor the machine.Pin class for external GPIO
machine_pin: add support for named pins and alternate functions
boards: add pin CSV files to board definitions
fix crash in a pin.irq handler
main: use mp_printf in nlr_jump_fail
machine_pin: fix configuring OPEN_DRAIN with initial value
boards/NULLBITS_BIT_C_PRO: add Bit-C PRO board
rp2_pio: track use of PIO resources and free them on soft reset
boards/ARDUINO_NANO_RP2040_CONNECT: use default aioble
mpconfigport: enable os.dupterm and hashlib.sha1 on all boards
cyw43_configport: specify the chipset firmware include file
Makefile: allow specifying BOARD_DIR on make command line
pendsv: add MICROPY_BOARD_PENDSV_ENTRIES for board customisation
boards/ARDUINO_NANO_RP2040_CONNECT: include "time" in manifest
boards/ARDUINO_NANO_RP2040_CONNECT: add more external pins
boards/ARDUINO_NANO_RP2040_CONNECT: include "senml" in manifest
modrp2: support reading the BOOTSEL button on the Pico board
modrp2: disable other core, shorten delay to 8us in bootsel_button
allocate GC heap from unused RAM
allow disabling USB via MICROPY_HW_ENABLE_USBDEV config
main: keep UART REPL with DEBUG=1 and MICROPY_HW_ENABLE_UART_REPL=1
machine_uart: fix setting of UART LCR parameters
machine_i2c: add timeout parameter for machine.I2C()
memmap_mp.ld: allow a board to reserve memory for the C heap

samd port:

mpconfigport: enable MICROPY_ENABLE_FINALISER when VFS is used
remove the existing provisional support for REPL on UART
boards: replace pins.c and pins.h by pins.csv
boards: move mcu-specific settings into a mpconfig_samdXX.h file
Makefile: alphabetically sort the source code files in Makefile
boards: add ADAFRUIT_FEATHER_M4_EXPRESS and _ITSYBITSY_M0_EXPRESS
clock_config: set up the clock configuration
modmachine: allow changing the CPU freq with machine.freq(f)
mphalport: add pin open-drain funcs, and improve delay and ticks
samd_isr: extend systick_ms to 64 bit
machine_pin: add OPEN_DRAIN mode for pins
machine_pin: allow specifying a pin or LED by its name as a string
modmachine: enable SoftSPI and SoftI2C
boards: create pin_af_table.c from pin_af_table_SAMDxx.csv files
pin_af: add the pin af table and its helper functions
machine_adc: add the machine.ADC class
machine_pwm: add the machine.PWM class
samd_isr: rework the interrupt tables
machine_pin: add pin.irq() to the machine.Pin class
modmachine: add disable_irq(), enable_irq() and idle() to machine
machine_uart: add the machine.UART class
machine_spi: add the machine.SPI class
machine_i2c: add the machine.I2C class
moduos: add uos.dupterm()
moduos: add uos.urandom() for SAMD51
main: use the common execution mode of boot.py and main.py
mpconfigport: enable a few more MicroPython features
samd_isr: change the way a Sercom ISR is registered and called
machine_timer: add machine.Timer based on the shared soft-timer
machine_wdt: add the machine.WDT class
modsamd: add pininfo() function to the samd module
machine_led: optimise size of the machine.LED class
machine_dac: add the machine.DAC class
modmachine: add machine.time_pulse_us
mcu: factor out MCU policy for SAMD21 and SAMD51
mphalport: add a mp_hal_ticks_ms_64() function
modutime: enable time.time() based on systick_ms()
machine_uart: support buffered TX for UART
boards: add missing/lost board config and pin definitions
mphalport: use CYCCNT for SAMD51's mp_hal_ticks_cpu()
machine_bitstream: add the machine.bitstream() function
mpconfigport: restructure to use ROM feature levels
clock_config: split clock_config.c to separate SAMD21/SAMD51 files
clock_config: add HW_DFLL_USB_SYNC and HW_MCU_OSC32KULP extensions
pin_af: simplify the pin-af-table handling
samd_flash: remove obsolete printf's and return values instead
Makefile: fix a dependency problem with "make -j"
mphalport: fix USB endpoint handling ignoring Ctrl-C
change the symbol names for the peripheral clocks
mcu: add floating point suport for SAMD21 devices
mcu: enable the math module on SAMD51
boards: move the flash filesystem definitions to the linker files
boards: use the same linker file for all SAMD51x19 variants
main: initialize readline on start up
mcu: use lf2s for SAMD51 and lfs1 for SAMD21
machine_pin: change the printing of Pin and LED objects
Makefile: split up SRC_C variables
rename machine I2C type consistently across ports
clock_config: extend the range of machine.freq()
clock_config: support changing machine.freq() for SAMD21
modmachine: add machine.reset_cause()
boards/SPARKFUN_SAMD51_THING_PLUS: add board files for Thing Plus
modmachine: add machine.dht_readinto and enable on SAMD51
mcu/samd51: enable onewire support for SAMD51
mcu/samd51: enable FAT support for SAMD51
modmachine: implement machine.lightsleep()
modmachine: get the bootloader magic address from the lib
clock_config: document the #defines use in init_clocks()
machine_uart: implement uart.txdone() and uart.flush()
mcu: make some settings in mpconfigmcu.h conditional
machine_rtc: add the machine.RTC class
clock_config: extend the SAMD51 us-counter to 60 bit
boards/SEEED_WIO_TERMINAL: declare more pins for SEEED WIO board
machine_pin: change the pin handling and naming/numbering
make ADC, DAC, PWM, SPI objects consistent in how they print out
modmachine: replace the LED class by the Signal class
boards: rework the pins.csv files
machine_pwm: serialize fast update of PWM settings
machine_uart: use a finaliser to tidy up UART on soft reset
machine_spi: implement spi.deinit() and simplify sercom_deinit_all
machine_spi: register SerCom objects as root pointers
modmachine: add machine.softreset()
machine_timer: use extmod version of machine.Timer
mcu/samd51: use an additional manifest.py for SAMD51 boards
README: update README to reflect recent changes to the port
boards/SEEED_WIO_TERMINAL: enable using the 32kHz crystal
mphalport: add a timeout to mp_hal_stdout_tx_strn()
move MCU-specific CFLAGS to mpconfigmcu.mk
Makefile: set MPY_CROSS_FLAGS
mpconfigport: support MICROPY_HW_SOFTSPI_MIN_DELAY
mpconfigport: use __WFE() in MICROPY_EVENT_POLL_HOOK
avoid under-/overflow in I2C and SPI baudrate calculations
machine_uart: fix IRQ flag setting and clearing
machine_uart: simplify machine_uart_any() and machine_uart_read()
machine_uart: check the UART TX pin assignment
machine_uart: fix uart.deinit() and save some RAM
add a vref=num option to the ADC and DAC constructor
support entering bootloader via USB CDC 1200bps touch
boards/SEEED_XIAO: rename to SEEED_XIAO_SAMD21
add Pin.board and Pin.cpu classes to Pin
boards: clean up comments and some pins in pins.csv files
mcu: rework the comments in clock_config.c
mcu: use the FDPLL96M clock for the SAMD21 CPU
mcu: implement a hardware seed for the SAMD21 random module
mcu: set the SAMD21 us-counter to 2 MHz for better resolution
moduos: add uos.urandom() using the phase-jitter rng
pendsv: add MICROPY_BOARD_PENDSV_ENTRIES for board customisation
always provide the machine.RTC class

stm32 port:

modmachine: allow boards to provide custom bootloader code
modmachine: factor out mboot enter code to a function
boards/stm32f091xc.ld: allocate space for a small filesystem
boards/NUCLEO_F091RC: enable LFS1 filesystem
Makefile: set CSUPEROPT to -Os for F0 and G0 MCUs to save space
usbd_cdc_interface: add support for Arduino 1200bps touch
usb: expose USB HID device instance via usbd_hid_get()
use a separate symbol name for the bootloader state pointer
Makefile: enable link-time-optimisation via LTO=1 make option
boards: enable LTO by default on boards with smaller flash size
Makefile: fix setting of define that enables WIZNET5K driver
mboot: remove redundant code in mboot_state_change function
boardctrl: allow boards to override fatal-error handler
sdram: include boardctrl.h for fatal-error handler
use MP_REGISTER_ROOT_POINTER()
Makefile: workaround LTO linker order bug in binutils <2.35
softtimer: switch to use softtimer code from shared/runtime
boards/LEGO_HUB_NO6: fix typo in README
boards/LEGO_HUB_NO6: use named pins
boards/LEGO_HUB_NO6/appupdate: detect filesystem size at runtime
boards/LEGO_HUB_NO6/spiflash: pick command type at runtime
boards/LEGO_HUB_NO6/cc2564: make timer configurable
boards/LEGO_HUB_NO7: add LEGO Hub No. 7 board definition
boards/NUCLEO_WB55: add error handling to firmware update scripts
don't enable debug info by default if LTO is on
switch Wiznet to use lib/wiznet5k and extmod/network_wiznet5k
add definitions required for lwIP version of Wiznet NIC
mphalport: add mp_hal_get_spi_obj() helper function
sdram: enable MPU for unaligned access on H7 MCUs
boards: increase mboot region to 32k for WB55 boards
move board variant config to mpconfigboard.mk
boardctrl: use HAL_Delay instead of mp_hal_delay_ms
remove support for CC3000 WiFi driver
machine_uart: implement uart.flush() and uart.txdone()
boards/LEGO_HUB_NO6: update manifest to new format
boards: only freeze LCD160CR driver in PYB board firmware
adc: make ADCAll.read_channel reject invalid channels
pyb_i2c: fix pyb.I2C to work with dma=True on F4 MCUs
timer: fix use of timer channel callback() method on L4 MCUs
boards: add alternate function list for STM32F446RE
boards/PYB: fix handling of BOARD_VARIANT selection
make-stmconst.py: support TypeDef's with a single char prefix
add support for STM32L1 MCUs
boards/NUCLEO_L152RE: add NUCLEO-L152RE board support
rename machine I2C and SPI types consistently across ports
boards/ARDUINO_PORTENTA_H7: revert to single-precision float
mbedtls: enable mbedtls certificate time validation
Makefile: allow overriding the default MBEDTLS_CONFIG_FILE
boards/ARDUINO_PORTENTA_H7: add custom mbedtls config
modmachine: move dht_readinto() to the machine module
spi: downgrade SPIHandle definitions to static
boards/ARDUINO_PORTENTA_H7: add more modules, I2C1 and SE pin
usbd_desc: support USB strings on CDC interface descriptors
Makefile: set MPY_CROSS_FLAGS based on MCU type
pyb_i2c: fix failing pyb.I2C(dma=True) after receiving 1 byte
i2c: fix I2C frequency calc so it doesn't exceed requested rate
adc: fix reading internal ADC channels on L4 MCUs
adc: fix ADCAll.read_core_temp() on L4 MCUs
i2c: add hardware I2C implementation for STM32L1
i2c: add hardware I2C implementation for STM32L4
mboot: make all mboot sectors erase/write protected
boards: add missing LPUART macros for H7 HAL
boards/NUCLEO_F429ZI: enable I2C1 and I2C2 with default pins
powerctrl: improve standby mode entry code for H7 MCUs
boards/NUCLEO_F756ZG: add board definition for NUCLEO-F756ZG
powerctrl: fix build on STM32G0xx and STM32H7Bx MCUs
boards: consolidate linker snippets to reduce duplication
Makefile: leave DFU mode after download when using dfu-util
boards/NUCLEO_H743ZI2: refer to NUCLEO_H743ZI for frozen manifest
boards/STM32F769DISC: fix building with USE_QSPI_XIP=1
boards/ARDUINO_PORTENTA_H7: fix macro value check for QSPI
boards/ARDUINO_PORTENTA_H7: use default aioble
Makefile: clean up nested if-else to chained if-else-if
update to use the open-source lib version of cyw43-driver
boards: update linker scripts now that big_const is gone
add a default implementation of pyb.country
cyw43_configport: fix build for boards without an RF switch
boards/PYBD_SF2: set CYW43 Bluetooth fimrware download baudrate
cyw43_configport: allow boards to override default resource files
boards/ARDUINO_PORTENTA_H7: update board config files
Makefile: include HAL HSEM driver on H747 MCUs
boards/ARDUINO_NICLA_VISION: add support for Arduino Nicla Vision
boards/ARDUINO_GIGA: add support for Arduino Giga H7 board
cyw43_configport: add cyw43_sdio_enable_high_speed_4bit function
powerctrl: add sleep RCC semaphore management for WB55 MCUs
powerctrl: disable WB55 BLE before entering deepsleep
powerctrlboot: provide custom SystemInit for WB55
powerctrl: don't compile WB helpers on WL MCUs
boards: include "senml" in manifest for ARDUINO boards
remove commented-out printf's and debugging code
main: use mp_printf instead of printf for MPY start-up messages
i2c: return error code and raise exception if I2C init fails
spi: return error code and raise exception if SPI init fails
modmachine: make machine.info print using mp_printf
extint: make ExtInt.regs print using mp_printf
pin: make pin_find debug output use mp_printf
pybthread: make pyb_thread_dump take a printer as its argument
boards/NUCLEO_H743ZI2: fix MCU tag in board.json file
mphalport: update HAL version to 1.11.0 to match stm32lib
add support for STM32H723 MCUs
boards: add ld and af.csv for H723
boards/NUCLEO_H723ZG: add new H723 board
add support for USB on G0 MCUs
mboot: add support for G0 MCUs
boards/NUCLEO_G0B1RE: add config for USB and mboot
boards/ARDUINO_NICLA_VISION: fix incorrect bootloader PID
flash: fix get_bank function for STM32H750
cyw43_configport: provide cyw43_hal_pin_config_irq_falling func

teensy port:

mpconfigport: drop unused root pointers
teensy_hal: use MP_REGISTER_ROOT_POINTER()

unix port:

variants: move setting of MICROPY_PY_USELECT to port config file
variants: enable remaining options on dev,coverage from ROM extra
variants/coverage: change config to use ROM level everything
variants/dev: allow all config options to be overridden
moduos: include errno.h
main: restore tty settings on nlr_jump_fail()
alloc: use MP_REGISTER_ROOT_POINTER() for mmap_region_head
mpconfigport: make MICROPY_EVENT_POLL_HOOK call usleep directly
mbedtls: add custom config for mbedtls
mpconfigport: switch ussl from axtls to mbedtls
Makefile: only include axtls in GIT_SUBMODULES list when enabled
Makefile: only checkout libffi submodule when used
mpconfigport: allow overriding MICROPY_EVENT_POLL_HOOK
enable MICROPY_GC_SPLIT_HEAP on coverage build
unix_mphal: allow overriding hal time functions
variants: remove variant suffix from executable filename
modjni: add missing const qualifier
remove .gitignore file
modusocket: support proto and flags arguments to getaddrinfo
include alloca.h for NetBSD
mpconfigport: enable MICROPY_ENABLE_FINALISER when VFS is used
variants: remove freedos and fast variants
refactor mpconfigport.h and mpconfigvariant.h
refactor mpconfigvariant.mk
variants/coverage: add test for manifest freeze_mpy()
enable sys.executable
Makefile: don't use _MOD variable names
modffi: move header includes inside MICROPY_PY_FFI guard
variants: change mip package to mip-cmdline
coverage: add extra GC coverage test for ATB gap byte
moduos: implement 2-arg version of os.getenv()
Makefile: disable building the shared library of libffi
main: free pathbuf when there's an error opening a file

webassembly port:

Makefile: remove obsolete disable of array-bounds warning
rename this port from 'javascript' to 'webassembly'
mpconfigport: use MICROPY_CONFIG_ROM_LEVEL_EXTRA_FEATURES
add support for VFS and enable VFS_POSIX
use Date's now() instead of getTime()
change "stack" argument to "heapsize"
support piping in a program on stdin
dispatch micropython-print via document not mp_js_stdout
README: update README to describe new stdout behaviour
Makefile: change compiler optimisation from O3 to Os
library: make use of CustomEvent detail property
library: extract and send data to print as UInt8Array

windows port:

provide a definition for MP_ALWAYSINLINE
msvc: support compressed ROM text for error messages
Makefile: update test dependency on $(PROG)
make project file read-only for IDE
.gitignore: simplify by removing build artefacts
msvc: remove variant suffix from executable filename
msvc: make mpy-cross independent of micropython variant
msvc: fix qstr generation dependency
msvc: fix module freezing

zephyr port:

update include paths to use the zephyr namespace
upgrade to Zephyr v3.1.0
use MP_REGISTER_ROOT_POINTER()
machine_uart: use mp_obj_str_get_str to get device name
boards: add config for bbc_microbit_v2
mpconfigport: enable MICROPY_ENABLE_FINALISER when VFS is used
rename machine I2C and SPI types consistently across ports

v1.19.1: Bug fix for esp32 SoftI2C

2022-06-17T02:58:09Z

This is a bug fix release. The changes are:

extmod/machine_i2c: only use WRITE1 option if transfer supports it

This fixes the machine.SoftI2C.readfrom_mem() method on esp32, so it
writes the address to read from.