BeagleBone Green - "RuntimeError: Unknown error" python PWM.start

[deelerke]

Hi, I'm trying to get this working on a Beaglebone Green with Debian Buster (Linux beaglebone 5.4.38-ti-r8)

root@beaglebone:~# python pwmtest.py
Traceback (most recent call last):
  File "pwmtest.py", line 2, in <module>
    pwm.start("P9_14",50);
RuntimeError: Unknown error

root@beaglebone:~# cat pwmtest.py
import Adafruit_BBIO.PWM as pwm
pwm.start("P9_14",50);
pwm.stop("P9_14");

root@beaglebone:~# /opt/scripts/tools/version.sh
git:/opt/scripts/:[ef16ffa8c27225005cc2b2c974a83da3dee6c1ef]
eeprom:[A335BNLTBBG1BBG217110074]
model:[TI_AM335x_BeagleBone_Green]
dogtag:[BeagleBoard.org Debian Buster Console Image 2020-05-18]
bootloader:[microSD-(push-button)]:[/dev/mmcblk0]:[U-Boot 2019.04-00002-g31a8ae0206]:[location: dd MBR]
UBOOT: Booted Device-Tree:[am335x-boneblack-uboot-univ.dts]
UBOOT: Loaded Overlay:[AM335X-PRU-RPROC-4-19-TI-00A0]
UBOOT: Loaded Overlay:[BB-ADC-00A0]
UBOOT: Loaded Overlay:[M-BB-BBG-00A0]
kernel:[5.4.38-ti-r8]
/boot/uEnv.txt Settings:
uboot_overlay_options:[enable_uboot_overlays=1]
uboot_overlay_options:[disable_uboot_overlay_emmc=1]
uboot_overlay_options:[disable_uboot_overlay_video=1]
uboot_overlay_options:[disable_uboot_overlay_audio=1]
uboot_overlay_options:[disable_uboot_overlay_wireless=1]
uboot_overlay_options:[uboot_overlay_pru=/lib/firmware/AM335X-PRU-RPROC-4-19-TI-00A0.dtbo]
uboot_overlay_options:[enable_uboot_cape_universal=1]
pkg check: to individually upgrade run: [sudo apt install --only-upgrade <pkg>]
pkg:[bb-cape-overlays]:[4.14.20200814.0-0~buster+20200814]
pkg:[bb-wl18xx-firmware]:[1.20200813.1-0~buster+20200813]
pkg:[kmod]:[26-1]
WARNING:pkg:[librobotcontrol]:[NOT_INSTALLED]
pkg:[firmware-ti-connectivity]:[20190717-2rcnee1~buster+20200305]
groups:[debian : debian adm kmem dialout cdrom floppy audio dip video plugdev users systemd-journal input bluetooth netdev gpio pwm eqep remoteproc admin spi iio i2c docker tisdk weston-launch xenomai cloud9ide]
cmdline:[console=ttyO0,115200n8 bone_capemgr.uboot_capemgr_enabled=1 root=/dev/mmcblk0p1 ro rootfstype=ext4 rootwait coherent_pool=1M net.ifnames=0 lpj=1990656 rng_core.default_quality=100 quiet]
dmesg | grep remote
[    2.534070] remoteproc remoteproc0: wkup_m3 is available
[    2.757005] remoteproc remoteproc1: 4a334000.pru is available
[    2.758730] remoteproc remoteproc2: 4a338000.pru is available
[    2.763043] remoteproc remoteproc0: powering up wkup_m3
[    2.763202] remoteproc remoteproc0: Booting fw image am335x-pm-firmware.elf, size 217168
[    2.767376] remoteproc remoteproc0: remote processor wkup_m3 is now up
dmesg | grep pru
[    2.757005] remoteproc remoteproc1: 4a334000.pru is available
[    2.757173] pru-rproc 4a334000.pru: PRU rproc node /ocp/interconnect@4a000000/segment@0/target-module@300000/pruss@0/pru@34000 probed successfully
[    2.758730] remoteproc remoteproc2: 4a338000.pru is available
[    2.758899] pru-rproc 4a338000.pru: PRU rproc node /ocp/interconnect@4a000000/segment@0/target-module@300000/pruss@0/pru@38000 probed successfully
dmesg | grep pinctrl-single
[    1.765188] pinctrl-single 44e10800.pinmux: 142 pins, size 568
dmesg | grep gpio-of-helper
[    1.779887] gpio-of-helper ocp:cape-universal: ready
END

and this is my /boot/uEnv.txt

root@beaglebone:~# cat /boot/uEnv.txt | grep -v '#'

uname_r=5.4.38-ti-r8

enable_uboot_overlays=1
disable_uboot_overlay_emmc=1
disable_uboot_overlay_video=1
disable_uboot_overlay_audio=1
disable_uboot_overlay_wireless=1
uboot_overlay_pru=/lib/firmware/AM335X-PRU-RPROC-4-19-TI-00A0.dtbo
enable_uboot_cape_universal=1

cmdline=coherent_pool=1M net.ifnames=0 lpj=1990656 rng_core.default_quality=100 quiet

thanks in advance for your suggestions

Dieter

[pdp7]

@deelerke please trying running the script with python3:
python3 pwmtest.py

Also please paste the contenxt of pwmtest.py.

[deelerke]

hi pdp7 ...

root@beaglebone:~# python3 pwmtest.py
Traceback (most recent call last):
  File "pwmtest.py", line 2, in <module>
    pwm.start("P9_14",50);
RuntimeError: Unknown error
root@beaglebone:~# cat pwmtest.py
import Adafruit_BBIO.PWM as pwm
pwm.start("P9_14",50);
pwm.stop("P9_14");
root@beaglebone:~#

thank you

[pdp7]

@deelerke Please try running with strace so I can see what issues may be happening

sudo strace -f -o /tmp/strace-log.txt python3 ./pwmtest.py

and attach a text file with output.

If strace does not exist, install it with:

sudo apt-get install strace

[deelerke]

hi !
I've attached the strace output.

strace-log.txt

thank you

[pdp7]

@deelerke thank you, unfortunately, I don't see anything that points to the issue in the strace. Could you please try doing a manual installation from this GitHub repo and trying again?

These are the instructions:
https://github.com/adafruit/adafruit-beaglebone-io-python#installation-on-debian

sudo apt-get update
sudo apt-get install build-essential python3-dev python3-pip -y
git clone git://github.com/adafruit/adafruit-beaglebone-io-python.git
cd adafruit-beaglebone-io-python
sudo python3 setup.py install

[deelerke]

hey pdp7, thanks for the instructions ... wish I had some good news, but unfortunately the results are the same

fyi, here's the output from the commands

Reading package lists... Done
Building dependency tree
Reading state information... Done
build-essential is already the newest version (12.6).
python3-pip is already the newest version (18.1-5).
python3-dev is already the newest version (3.7.3-1).
python3-dev set to manually installed.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
root@beaglebone:~# git clone git://github.com/adafruit/adafruit-beaglebone-io-python.git
Cloning into 'adafruit-beaglebone-io-python'...
remote: Enumerating objects: 69, done.
remote: Counting objects: 100% (69/69), done.
remote: Compressing objects: 100% (47/47), done.
remote: Total 2429 (delta 42), reused 36 (delta 22), pack-reused 2360
Receiving objects: 100% (2429/2429), 612.15 KiB | 1.46 MiB/s, done.
Resolving deltas: 100% (1567/1567), done.
root@beaglebone:~# cd adafruit-beaglebone-io-python/
root@beaglebone:~/adafruit-beaglebone-io-python# python3 setup.py install
running install
running bdist_egg
running egg_info
creating Adafruit_BBIO.egg-info
writing Adafruit_BBIO.egg-info/PKG-INFO
writing dependency_links to Adafruit_BBIO.egg-info/dependency_links.txt
writing top-level names to Adafruit_BBIO.egg-info/top_level.txt
writing manifest file 'Adafruit_BBIO.egg-info/SOURCES.txt'
reading manifest file 'Adafruit_BBIO.egg-info/SOURCES.txt'
reading manifest template 'MANIFEST.in'
writing manifest file 'Adafruit_BBIO.egg-info/SOURCES.txt'
installing library code to build/bdist.linux-armv7l/egg
running install_lib
running build_py
creating build
creating build/lib.linux-armv7l-3.7
copying Adafruit_I2C.py -> build/lib.linux-armv7l-3.7
creating build/lib.linux-armv7l-3.7/Adafruit_BBIO
copying Adafruit_BBIO/__init__.py -> build/lib.linux-armv7l-3.7/Adafruit_BBIO
copying Adafruit_BBIO/Encoder.py -> build/lib.linux-armv7l-3.7/Adafruit_BBIO
copying Adafruit_BBIO/sysfs.py -> build/lib.linux-armv7l-3.7/Adafruit_BBIO
creating build/lib.linux-armv7l-3.7/overlays
copying overlays/__init__.py -> build/lib.linux-armv7l-3.7/overlays
copying overlays/builder.py -> build/lib.linux-armv7l-3.7/overlays
running build_ext
building 'Adafruit_BBIO.GPIO' extension
creating build/temp.linux-armv7l-3.7
creating build/temp.linux-armv7l-3.7/source
arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=forma                                                                                                  t-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -DBBBVERSION41 -Isource/include/ -I/usr/include/python3.7m -c so                                                                                                  urce/py_gpio.c -o build/temp.linux-armv7l-3.7/source/py_gpio.o -Wall
arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=forma                                                                                                  t-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -DBBBVERSION41 -Isource/include/ -I/usr/include/python3.7m -c so                                                                                                  urce/event_gpio.c -o build/temp.linux-armv7l-3.7/source/event_gpio.o -Wall
arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=forma                                                                                                  t-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -DBBBVERSION41 -Isource/include/ -I/usr/include/python3.7m -c so                                                                                                  urce/c_pinmux.c -o build/temp.linux-armv7l-3.7/source/c_pinmux.o -Wall
arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -DBBBVERSION41 -Isource/include/ -I/usr/include/python3.7m -c source/constants.c -o build/temp.linux-armv7l-3.7/source/constants.o -Wall
arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -DBBBVERSION41 -Isource/include/ -I/usr/include/python3.7m -c source/common.c -o build/temp.linux-armv7l-3.7/source/common.o -Wall
arm-linux-gnueabihf-gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,relro -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 build/temp.linux-armv7l-3.7/source/py_gpio.o build/temp.linux-armv7l-3.7/source/event_gpio.o build/temp.linux-armv7l-3.7/source/c_pinmux.o build/temp.linux-armv7l-3.7/source/constants.o build/temp.linux-armv7l-3.7/source/common.o -o build/lib.linux-armv7l-3.7/Adafruit_BBIO/GPIO.cpython-37m-arm-linux-gnueabihf.so
building 'Adafruit_BBIO.PWM' extension
arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -DBBBVERSION41 -Isource/include/ -I/usr/include/python3.7m -c source/py_pwm.c -o build/temp.linux-armv7l-3.7/source/py_pwm.o -Wall
arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -DBBBVERSION41 -Isource/include/ -I/usr/include/python3.7m -c source/c_pwm.c -o build/temp.linux-armv7l-3.7/source/c_pwm.o -Wall
arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=forma                                                                                                  t-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -DBBBVERSION41 -Isource/include/ -I/usr/include/python3.7m -c so                                                                                                  urce/c_pinmux.c -o build/temp.linux-armv7l-3.7/source/c_pinmux.o -Wall
arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=forma                                                                                                  t-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -DBBBVERSION41 -Isource/include/ -I/usr/include/python3.7m -c so                                                                                                  urce/constants.c -o build/temp.linux-armv7l-3.7/source/constants.o -Wall
arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=forma                                                                                                  t-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -DBBBVERSION41 -Isource/include/ -I/usr/include/python3.7m -c so                                                                                                  urce/common.c -o build/temp.linux-armv7l-3.7/source/common.o -Wall
arm-linux-gnueabihf-gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,relro -g -fstack-pr                                                                                                  otector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 build/temp.linux-armv7l-3.7/sourc                                                                                                  e/py_pwm.o build/temp.linux-armv7l-3.7/source/c_pwm.o build/temp.linux-armv7l-3.7/source/c_pinmux.o build/temp.li                                                                                                  nux-armv7l-3.7/source/constants.o build/temp.linux-armv7l-3.7/source/common.o -o build/lib.linux-armv7l-3.7/Adafr                                                                                                  uit_BBIO/PWM.cpython-37m-arm-linux-gnueabihf.so
building 'Adafruit_BBIO.ADC' extension
arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=forma                                                                                                  t-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -DBBBVERSION41 -Isource/include/ -I/usr/include/python3.7m -c so                                                                                                  urce/py_adc.c -o build/temp.linux-armv7l-3.7/source/py_adc.o -Wall
arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=forma                                                                                                  t-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -DBBBVERSION41 -Isource/include/ -I/usr/include/python3.7m -c so                                                                                                  urce/c_adc.c -o build/temp.linux-armv7l-3.7/source/c_adc.o -Wall
arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=forma                                                                                                  t-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -DBBBVERSION41 -Isource/include/ -I/usr/include/python3.7m -c so                                                                                                  urce/constants.c -o build/temp.linux-armv7l-3.7/source/constants.o -Wall
arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=forma                                                                                                  t-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -DBBBVERSION41 -Isource/include/ -I/usr/include/python3.7m -c so                                                                                                  urce/common.c -o build/temp.linux-armv7l-3.7/source/common.o -Wall
arm-linux-gnueabihf-gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,relro -g -fstack-pr                                                                                                  otector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 build/temp.linux-armv7l-3.7/sourc                                                                                                  e/py_adc.o build/temp.linux-armv7l-3.7/source/c_adc.o build/temp.linux-armv7l-3.7/source/constants.o build/temp.l                                                                                                  inux-armv7l-3.7/source/common.o -o build/lib.linux-armv7l-3.7/Adafruit_BBIO/ADC.cpython-37m-arm-linux-gnueabihf.s                                                                                                  o
building 'Adafruit_BBIO.SPI' extension
arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=forma                                                                                                  t-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -DBBBVERSION41 -Isource/include/ -I/usr/include/python3.7m -c so                                                                                                  urce/spimodule.c -o build/temp.linux-armv7l-3.7/source/spimodule.o -Wall
arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=forma                                                                                                  t-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -DBBBVERSION41 -Isource/include/ -I/usr/include/python3.7m -c so                                                                                                  urce/c_pinmux.c -o build/temp.linux-armv7l-3.7/source/c_pinmux.o -Wall
arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=forma                                                                                                  t-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -DBBBVERSION41 -Isource/include/ -I/usr/include/python3.7m -c so                                                                                                  urce/constants.c -o build/temp.linux-armv7l-3.7/source/constants.o -Wall
arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=forma                                                                                                  t-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -DBBBVERSION41 -Isource/include/ -I/usr/include/python3.7m -c so                                                                                                  urce/common.c -o build/temp.linux-armv7l-3.7/source/common.o -Wall
arm-linux-gnueabihf-gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,relro -g -fstack-pr                                                                                                  otector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 build/temp.linux-armv7l-3.7/sourc                                                                                                  e/spimodule.o build/temp.linux-armv7l-3.7/source/c_pinmux.o build/temp.linux-armv7l-3.7/source/constants.o build/                                                                                                  temp.linux-armv7l-3.7/source/common.o -o build/lib.linux-armv7l-3.7/Adafruit_BBIO/SPI.cpython-37m-arm-linux-gnuea                                                                                                  bihf.so
building 'Adafruit_BBIO.UART' extension
arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=forma                                                                                                  t-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -DBBBVERSION41 -Isource/include/ -I/usr/include/python3.7m -c so                                                                                                  urce/py_uart.c -o build/temp.linux-armv7l-3.7/source/py_uart.o -Wall
arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=forma                                                                                                  t-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -DBBBVERSION41 -Isource/include/ -I/usr/include/python3.7m -c so                                                                                                  urce/c_pinmux.c -o build/temp.linux-armv7l-3.7/source/c_pinmux.o -Wall
arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=forma                                                                                                  t-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -DBBBVERSION41 -Isource/include/ -I/usr/include/python3.7m -c so                                                                                                  urce/c_uart.c -o build/temp.linux-armv7l-3.7/source/c_uart.o -Wall
arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=forma                                                                                                  t-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -DBBBVERSION41 -Isource/include/ -I/usr/include/python3.7m -c so                                                                                                  urce/constants.c -o build/temp.linux-armv7l-3.7/source/constants.o -Wall
arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=forma                                                                                                  t-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -DBBBVERSION41 -Isource/include/ -I/usr/include/python3.7m -c so                                                                                                  urce/common.c -o build/temp.linux-armv7l-3.7/source/common.o -Wall
arm-linux-gnueabihf-gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,relro -g -fstack-pr                                                                                                  otector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 build/temp.linux-armv7l-3.7/sourc                                                                                                  e/py_uart.o build/temp.linux-armv7l-3.7/source/c_pinmux.o build/temp.linux-armv7l-3.7/source/c_uart.o build/temp.                                                                                                  linux-armv7l-3.7/source/constants.o build/temp.linux-armv7l-3.7/source/common.o -o build/lib.linux-armv7l-3.7/Ada                                                                                                  fruit_BBIO/UART.cpython-37m-arm-linux-gnueabihf.so
creating build/bdist.linux-armv7l
creating build/bdist.linux-armv7l/egg
creating build/bdist.linux-armv7l/egg/Adafruit_BBIO
copying build/lib.linux-armv7l-3.7/Adafruit_BBIO/__init__.py -> build/bdist.linux-armv7l/egg/Adafruit_BBIO
copying build/lib.linux-armv7l-3.7/Adafruit_BBIO/ADC.cpython-37m-arm-linux-gnueabihf.so -> build/bdist.linux-armv                                                                                                  7l/egg/Adafruit_BBIO
copying build/lib.linux-armv7l-3.7/Adafruit_BBIO/Encoder.py -> build/bdist.linux-armv7l/egg/Adafruit_BBIO
copying build/lib.linux-armv7l-3.7/Adafruit_BBIO/sysfs.py -> build/bdist.linux-armv7l/egg/Adafruit_BBIO
copying build/lib.linux-armv7l-3.7/Adafruit_BBIO/SPI.cpython-37m-arm-linux-gnueabihf.so -> build/bdist.linux-armv                                                                                                  7l/egg/Adafruit_BBIO
copying build/lib.linux-armv7l-3.7/Adafruit_BBIO/UART.cpython-37m-arm-linux-gnueabihf.so -> build/bdist.linux-arm                                                                                                  v7l/egg/Adafruit_BBIO
copying build/lib.linux-armv7l-3.7/Adafruit_BBIO/PWM.cpython-37m-arm-linux-gnueabihf.so -> build/bdist.linux-armv                                                                                                  7l/egg/Adafruit_BBIO
copying build/lib.linux-armv7l-3.7/Adafruit_BBIO/GPIO.cpython-37m-arm-linux-gnueabihf.so -> build/bdist.linux-arm                                                                                                  v7l/egg/Adafruit_BBIO
copying build/lib.linux-armv7l-3.7/Adafruit_I2C.py -> build/bdist.linux-armv7l/egg
creating build/bdist.linux-armv7l/egg/overlays
copying build/lib.linux-armv7l-3.7/overlays/__init__.py -> build/bdist.linux-armv7l/egg/overlays
copying build/lib.linux-armv7l-3.7/overlays/builder.py -> build/bdist.linux-armv7l/egg/overlays
byte-compiling build/bdist.linux-armv7l/egg/Adafruit_BBIO/__init__.py to __init__.cpython-37.pyc
byte-compiling build/bdist.linux-armv7l/egg/Adafruit_BBIO/Encoder.py to Encoder.cpython-37.pyc
byte-compiling build/bdist.linux-armv7l/egg/Adafruit_BBIO/sysfs.py to sysfs.cpython-37.pyc
byte-compiling build/bdist.linux-armv7l/egg/Adafruit_I2C.py to Adafruit_I2C.cpython-37.pyc
byte-compiling build/bdist.linux-armv7l/egg/overlays/__init__.py to __init__.cpython-37.pyc
byte-compiling build/bdist.linux-armv7l/egg/overlays/builder.py to builder.cpython-37.pyc
creating stub loader for Adafruit_BBIO/GPIO.cpython-37m-arm-linux-gnueabihf.so
creating stub loader for Adafruit_BBIO/PWM.cpython-37m-arm-linux-gnueabihf.so
creating stub loader for Adafruit_BBIO/ADC.cpython-37m-arm-linux-gnueabihf.so
creating stub loader for Adafruit_BBIO/SPI.cpython-37m-arm-linux-gnueabihf.so
creating stub loader for Adafruit_BBIO/UART.cpython-37m-arm-linux-gnueabihf.so
byte-compiling build/bdist.linux-armv7l/egg/Adafruit_BBIO/GPIO.py to GPIO.cpython-37.pyc
byte-compiling build/bdist.linux-armv7l/egg/Adafruit_BBIO/PWM.py to PWM.cpython-37.pyc
byte-compiling build/bdist.linux-armv7l/egg/Adafruit_BBIO/ADC.py to ADC.cpython-37.pyc
byte-compiling build/bdist.linux-armv7l/egg/Adafruit_BBIO/SPI.py to SPI.cpython-37.pyc
byte-compiling build/bdist.linux-armv7l/egg/Adafruit_BBIO/UART.py to UART.cpython-37.pyc
creating build/bdist.linux-armv7l/egg/EGG-INFO
copying Adafruit_BBIO.egg-info/PKG-INFO -> build/bdist.linux-armv7l/egg/EGG-INFO
copying Adafruit_BBIO.egg-info/SOURCES.txt -> build/bdist.linux-armv7l/egg/EGG-INFO
copying Adafruit_BBIO.egg-info/dependency_links.txt -> build/bdist.linux-armv7l/egg/EGG-INFO
copying Adafruit_BBIO.egg-info/top_level.txt -> build/bdist.linux-armv7l/egg/EGG-INFO
writing build/bdist.linux-armv7l/egg/EGG-INFO/native_libs.txt
zip_safe flag not set; analyzing archive contents...
Adafruit_BBIO.__pycache__.ADC.cpython-37: module references __file__
Adafruit_BBIO.__pycache__.GPIO.cpython-37: module references __file__
Adafruit_BBIO.__pycache__.PWM.cpython-37: module references __file__
Adafruit_BBIO.__pycache__.SPI.cpython-37: module references __file__
Adafruit_BBIO.__pycache__.UART.cpython-37: module references __file__
creating dist
creating 'dist/Adafruit_BBIO-1.2.0-py3.7-linux-armv7l.egg' and adding 'build/bdist.linux-armv7l/egg' to it
removing 'build/bdist.linux-armv7l/egg' (and everything under it)
Processing Adafruit_BBIO-1.2.0-py3.7-linux-armv7l.egg
creating /usr/local/lib/python3.7/dist-packages/Adafruit_BBIO-1.2.0-py3.7-linux-armv7l.egg
Extracting Adafruit_BBIO-1.2.0-py3.7-linux-armv7l.egg to /usr/local/lib/python3.7/dist-packages
Adding Adafruit-BBIO 1.2.0 to easy-install.pth file

Installed /usr/local/lib/python3.7/dist-packages/Adafruit_BBIO-1.2.0-py3.7-linux-armv7l.egg
Processing dependencies for Adafruit-BBIO==1.2.0
Finished processing dependencies for Adafruit-BBIO==1.2.0
root@beaglebone:~/adafruit-beaglebone-io-python# python3 pwmtest.py
python3: can't open file 'pwmtest.py': [Errno 2] No such file or directory
root@beaglebone:~/adafruit-beaglebone-io-python# cd ..
root@beaglebone:~# python3 pwmtest.py
Traceback (most recent call last):
  File "pwmtest.py", line 2, in <module>
    pwm.start("P9_14",50);
RuntimeError: Unknown error
root@beaglebone:~#

[pdp7]

@deelerke Thank for doing that.

Would it possible for you start fresh with another microSD card?

If so, this is the most recent testing Debian image: bone-debian-10.5-iot-armhf-2020-08-25-4gb.img.xz

[deelerke]

sure, downloading it now... it's not that far off from the one I've downloaded before: bone-debian-10.4-console-armhf-2020-05-18-1gb.img ... let's see, keep you posted ....

[deelerke]

that works !

both python3 and python (2.7) run the pwmtest.py without errors.

I'll stick to this image then !

thanks a lot

[pdp7]

@deelerke great to hear!

[deelerke]

thanks pdp7 ...

The issue seems to return however with a different PWM pin.
First of all, let me demonstrate the older system (hostname: "lighthub") it works on:

root@lighthub:~# uname -na
Linux lighthub 4.14.108-ti-r104 #1 SMP PREEMPT Tue Apr 9 18:16:29 UTC 2019 armv7l GNU/Linux
root@lighthub:~# more /etc/dogtag
rcn-ee.net console Debian Image 2019-04-10
root@lighthub:~# /opt/scripts/tools/version.sh
git:/opt/scripts/:[9df8deb6b2ae7570c9102ab58f795d3bed592194]
eeprom:[A335BNLTBBG1BBG217097038]
model:[TI_AM335x_BeagleBone_Green]
dogtag:[rcn-ee.net console Debian Image 2019-04-10]
bootloader:[microSD-(push-button)]:[/dev/mmcblk0]:[U-Boot 2019.01-00002-g6de8c74429]:[location: dd MBR]
kernel:[4.14.108-ti-r104]
uboot_overlay_options:[enable_uboot_overlays=1]
uboot_overlay_options:[disable_uboot_overlay_emmc=1]
uboot_overlay_options:[disable_uboot_overlay_video=1]
uboot_overlay_options:[disable_uboot_overlay_audio=1]
uboot_overlay_options:[disable_uboot_overlay_wireless=1]
uboot_overlay_options:[uboot_overlay_pru=/lib/firmware/AM335X-PRU-UIO-00A0.dtbo]
uboot_overlay_options:[enable_uboot_cape_universal=1]
pkg check: to individually upgrade run: [sudo apt install --only-upgrade <pkg>]
pkg:[bb-cape-overlays]:[4.14.20200814.0-0~stretch+20200814]
pkg:[bb-wl18xx-firmware]:[1.20200813.1-0~stretch+20200813]
pkg:[kmod]:[23-2rcnee1~stretch+20171005]
WARNING:pkg:[librobotcontrol]:[NOT_INSTALLED]
pkg:[firmware-ti-connectivity]:[20190717-2rcnee1~stretch+20200305]
groups:[debian : debian adm kmem dialout cdrom floppy audio dip video plugdev users systemd-journal i2c bluetooth netdev gpio pwm eqep admin spi tisdk west                                                        on-launch xenomai cloud9ide]
cmdline:[console=ttyO0,115200n8 bone_capemgr.uboot_capemgr_enabled=1 root=/dev/mmcblk0p1 ro rootfstype=ext4 rootwait coherent_pool=1M net.ifnames=0 quiet c                                                        ape_universal=enable]
dmesg | grep remote
[    1.254581] remoteproc remoteproc0: wkup_m3 is available
[    1.343054] remoteproc remoteproc0: powering up wkup_m3
[    1.343172] remoteproc remoteproc0: Booting fw image am335x-pm-firmware.elf, size 217168
[    1.347686] remoteproc remoteproc0: remote processor wkup_m3 is now up
dmesg | grep pru
dmesg | grep pinctrl-single
[    0.928665] pinctrl-single 44e10800.pinmux: 142 pins at pa f9e10800 size 568
dmesg | grep gpio-of-helper
[    0.941168] gpio-of-helper ocp:cape-universal: ready
lsusb
Bus 001 Device 002: ID 1a86:7523 QinHeng Electronics HL-340 USB-Serial adapter
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
END

if I do run the pwmtest.py on this system, then it works:

root@lighthub:~# cat pwmtest.py
import Adafruit_BBIO.PWM as pwm
pwm.start("P9_22",50);
pwm.start("P9_42",50);

root@lighthub:~# python pwmtest.py
root@lighthub:~#

so all good no errors for both p9_22 and p9_42

But.... running this on my brand new image:

root@beaglebone:~# cat pwmtest.py
import Adafruit_BBIO.PWM as pwm
pwm.start("P9_22",50);
pwm.start("P9_42",50);

root@beaglebone:~# python pwmtest.py
Traceback (most recent call last):
  File "pwmtest.py", line 3, in <module>
    pwm.start("P9_42",50);
RuntimeError: Unknown error
root@beaglebone:~#

the dreaded error is back :(

I must be missing something here ...

[deelerke]

so in a nutshell:
on the new image with kernel 4.19.94-ti-r50 : P9_14 seems ok , so does P9_22 ... but not P9_45
on the older image with kernel 4.14.108-ti-r104 : all PWM pins work

[pdp7]

@deelerke please paste /boot/uEnv.txt as it is possible that some of those pins are being occuppied by settings in device tree overlay (such as for HDMI or eMMC): https://elinux.org/Beagleboard:BeagleBoneBlack_Debian#U-Boot_Disable_on-board_devices

Also, please run this for those pins:

config-pin -q P9.22
config-pin -q P9.42
sudo config-pin P9.22
sudo config-pin P9.42

[deelerke]

hi , sorry missed your reply there, hence the late reaction:

this is the uEnv.txt

root@beaglebone:~# cat /boot/uEnv.txt
#Docs: http://elinux.org/Beagleboard:U-boot_partitioning_layout_2.0

uname_r=4.19.94-ti-r50
#uuid=
#dtb=

###U-Boot Overlays###
###Documentation: http://elinux.org/Beagleboard:BeagleBoneBlack_Debian#U-Boot_Overlays
###Master Enable
enable_uboot_overlays=1
###
###Overide capes with eeprom
#uboot_overlay_addr0=<file0>.dtbo
#uboot_overlay_addr1=<file1>.dtbo
#uboot_overlay_addr2=<file2>.dtbo
#uboot_overlay_addr3=<file3>.dtbo
###
###Additional custom capes
#uboot_overlay_addr4=<file4>.dtbo
#uboot_overlay_addr5=<file5>.dtbo
#uboot_overlay_addr6=<file6>.dtbo
#uboot_overlay_addr7=<file7>.dtbo
###
###Custom Cape
#dtb_overlay=<file8>.dtbo
###
###Disable auto loading of virtual capes (emmc/video/wireless/adc)
disable_uboot_overlay_emmc=1
disable_uboot_overlay_video=1
disable_uboot_overlay_audio=1
disable_uboot_overlay_wireless=1
#disable_uboot_overlay_adc=1
###
###PRUSS OPTIONS
###pru_rproc (4.14.x-ti kernel)
#uboot_overlay_pru=AM335X-PRU-RPROC-4-14-TI-00A0.dtbo
###pru_rproc (4.19.x-ti kernel)
uboot_overlay_pru=AM335X-PRU-RPROC-4-19-TI-00A0.dtbo
###pru_uio (4.14.x-ti, 4.19.x-ti & mainline/bone kernel)
#uboot_overlay_pru=AM335X-PRU-UIO-00A0.dtbo
###
###Cape Universal Enable
enable_uboot_cape_universal=1
###
###Debug: disable uboot autoload of Cape
#disable_uboot_overlay_addr0=1
#disable_uboot_overlay_addr1=1
#disable_uboot_overlay_addr2=1
#disable_uboot_overlay_addr3=1
###
###U-Boot fdt tweaks... (60000 = 384KB)
#uboot_fdt_buffer=0x60000
###U-Boot Overlays###

cmdline=coherent_pool=1M net.ifnames=0 lpj=1990656 rng_core.default_quality=100 quiet

#In the event of edid real failures, uncomment this next line:
#cmdline=coherent_pool=1M net.ifnames=0 lpj=1990656 rng_core.default_quality=100 quiet video=HDMI-A-1:1024x768@60e

##enable Generic eMMC Flasher:
##make sure, these tools are installed: dosfstools rsync
#cmdline=init=/opt/scripts/tools/eMMC/init-eMMC-flasher-v3.sh

and the config commands:

root@beaglebone:~# config-pin -q P9.22

Current mode for P9_22 is:     default

root@beaglebone:~# config-pin -q P9.42

Current mode for P9_42 is:     default

root@beaglebone:~# python pwmtest.py
Traceback (most recent call last):
  File "pwmtest.py", line 3, in <module>
    pwm.start("P9_42",50);
RuntimeError: Unknown error

root@beaglebone:~# cat pwmtest.py
import Adafruit_BBIO.PWM as pwm
pwm.start("P9_22",50);
pwm.start("P9_42",50);

[pdp7]

Apologies, I truncated my commands. The last two should have been:

sudo config-pin P9.22 pwm
sudo config-pin P9.42 pwm

This should put the pins into pwm mode.

Could you retry running the script after that?

Also, please paste the output of this command so I can see the state of the Linux pwm driver:

sudo find /sys/devices/ -type f | grep pwm