esp-rs · jessebraham · Dec 12, 2023 · Dec 12, 2023 · Dec 12, 2023
diff --git a/README.md b/README.md
@@ -4,13 +4,13 @@
 ![MIT/Apache-2.0 licensed](https://img.shields.io/badge/license-MIT%2FApache--2.0-blue?style=flat-square)
 [![Matrix](https://img.shields.io/matrix/esp-rs:matrix.org?label=join%20matrix&color=BEC5C9&logo=matrix&style=flat-square)](https://matrix.to/#/#esp-rs:matrix.org)
 
-**H**ardware **A**bstraction **L**ayer crates for the **ESP32**, **ESP32-C2/C3/C6**, **ESP32-H2**, and **ESP32-S2/S3** from Espressif.
+**H**ardware **A**bstraction **L**ayer crates for the **ESP32**, **ESP32-C2/C3/C6**, **ESP32-H2**, and **ESP32-S2/S3** from Espressif. Additionally provides support for programming the low-power RISC-V cores found on the **ESP32-C6** and **ESP32-S2/S3**.
 
 These HALs are `no_std`; if you are looking for `std` support, please use [esp-idf-hal] instead.
 
 If you have any questions, comments, or concerns, please [open an issue], [start a new discussion], or join us on [Matrix]. For additional information regarding any of the crates in this repository, please refer to the relevant crate's README.
 
-> **Note**
+> [!NOTE]
 >
 > This project is still in the relatively early stages of development, and as such there should be no expectation of API stability. A significant number of peripherals currently have drivers implemented but have varying levels of functionality. For most basic tasks, this should be usable already, however some more advanced or uncommon features may not yet be implemented.
 
@@ -38,22 +38,22 @@ For information about the HAL and how to use it in your own projects, please ref
 
 ## HAL Crates
 
-|      Crate       |                   Documentation                    | Technical Reference Manual |             Target             |
-| :--------------: | :------------------------------------------------: | :------------------------: | :----------------------------: |
-|   [esp32-hal]    |   [![esp32-hal-docs]](https://docs.rs/esp32-hal)   |          [ESP32]           |    `xtensa-esp32-none-elf`     |
-|  [esp32c2-hal]   | [![esp32c2-hal-docs]](https://docs.rs/esp32c2-hal) |         [ESP32-C2]         | `riscv32imc-unknown-none-elf`  |
-|  [esp32c3-hal]   | [![esp32c3-hal-docs]](https://docs.rs/esp32c3-hal) |         [ESP32-C3]         | `riscv32imc-unknown-none-elf`  |
-|  [esp32c6-hal]   | [![esp32c6-hal-docs]](https://docs.rs/esp32c6-hal) |         [ESP32-C6]         | `riscv32imac-unknown-none-elf` |
-| [esp32c6-lp-hal] |                        N/A                         |            N/A             | `riscv32imac-unknown-none-elf` |
-|  [esp32h2-hal]   | [![esp32h2-hal-docs]](https://docs.rs/esp32h2-hal) |         [ESP32-H2]         | `riscv32imac-unknown-none-elf` |
-|  [esp32s2-hal]   | [![esp32s2-hal-docs]](https://docs.rs/esp32s2-hal) |         [ESP32-S2]         |   `xtensa-esp32s2-none-elf`    |
-|  [esp32s3-hal]   | [![esp32s3-hal-docs]](https://docs.rs/esp32s3-hal) |         [ESP32-S3]         |   `xtensa-esp32s3-none-elf`    |
+### High-Power Cores
+
+|     Crate     |                   Documentation                    | Technical Reference Manual |             Target             |
+| :-----------: | :------------------------------------------------: | :------------------------: | :----------------------------: |
+|  [esp32-hal]  |   [![esp32-hal-docs]](https://docs.rs/esp32-hal)   |          [ESP32]           |    `xtensa-esp32-none-elf`     |
+| [esp32c2-hal] | [![esp32c2-hal-docs]](https://docs.rs/esp32c2-hal) |         [ESP32-C2]         | `riscv32imc-unknown-none-elf`  |
+| [esp32c3-hal] | [![esp32c3-hal-docs]](https://docs.rs/esp32c3-hal) |         [ESP32-C3]         | `riscv32imc-unknown-none-elf`  |
+| [esp32c6-hal] | [![esp32c6-hal-docs]](https://docs.rs/esp32c6-hal) |         [ESP32-C6]         | `riscv32imac-unknown-none-elf` |
+| [esp32h2-hal] | [![esp32h2-hal-docs]](https://docs.rs/esp32h2-hal) |         [ESP32-H2]         | `riscv32imac-unknown-none-elf` |
+| [esp32s2-hal] | [![esp32s2-hal-docs]](https://docs.rs/esp32s2-hal) |         [ESP32-S2]         |   `xtensa-esp32s2-none-elf`    |
+| [esp32s3-hal] | [![esp32s3-hal-docs]](https://docs.rs/esp32s3-hal) |         [ESP32-S3]         |   `xtensa-esp32s3-none-elf`    |
 
 [esp32-hal]: https://github.com/esp-rs/esp-hal/tree/main/esp32-hal
 [esp32c2-hal]: https://github.com/esp-rs/esp-hal/tree/main/esp32c2-hal
 [esp32c3-hal]: https://github.com/esp-rs/esp-hal/tree/main/esp32c3-hal
 [esp32c6-hal]: https://github.com/esp-rs/esp-hal/tree/main/esp32c6-hal
-[esp32c6-lp-hal]: https://github.com/esp-rs/esp-hal/tree/main/esp32c6-lp-hal
 [esp32h2-hal]: https://github.com/esp-rs/esp-hal/tree/main/esp32h2-hal
 [esp32s2-hal]: https://github.com/esp-rs/esp-hal/tree/main/esp32s2-hal
 [esp32s3-hal]: https://github.com/esp-rs/esp-hal/tree/main/esp32s3-hal
@@ -72,6 +72,16 @@ For information about the HAL and how to use it in your own projects, please ref
 [esp32-s2]: https://www.espressif.com/sites/default/files/documentation/esp32-s2_technical_reference_manual_en.pdf
 [esp32-s3]: https://www.espressif.com/sites/default/files/documentation/esp32-s3_technical_reference_manual_en.pdf
 
+### Low-Power Cores
+
+|        Crate        |       Documentation        |             Target             |
+| :-----------------: | :------------------------: | :----------------------------: |
+| [esp-ulp-riscv-hal] | N/A (_Not yet ppublished_) | `riscv32imc-unknown-none-elf`  |
+|  [esp32c6-lp-hal]   | N/A (_Not yet ppublished_) | `riscv32imac-unknown-none-elf` |
+
+[esp-ulp-riscv-hal]: https://github.com/esp-rs/esp-hal/tree/main/esp-ulp-riscv-hal
+[esp32c6-lp-hal]: https://github.com/esp-rs/esp-hal/tree/main/esp32c6-lp-hal
+
 ## Ancillary Crates
 
 There are a number of other crates within the [esp-rs organization] which can be used in conjunction with `esp-hal`:
@@ -81,6 +91,7 @@ There are a number of other crates within the [esp-rs organization] which can be
 |   [esp-alloc]    |                        A simple `no_std` heap allocator                        |
 | [esp-backtrace]  |                 Backtrace support for bare-metal applications                  |
 | [esp-ieee802154] |          Low-level IEEE802.15.4 driver for the ESP32-C6 and ESP32-H2           |
+| [esp-openthread] |           A bare-metal Thread implementation using `esp-ieee802154`            |
 |  [esp-println]   |                Provides `print!` and `println!` implementations                |
 |  [esp-storage]   | Implementation of [embedded-storage] traits to access unencrypted flash memory |
 |    [esp-wifi]    |                       `no_std` Wi-Fi/BLE/ESP-NOW support                       |
@@ -89,6 +100,7 @@ There are a number of other crates within the [esp-rs organization] which can be
 [esp-alloc]: https://github.com/esp-rs/esp-alloc
 [esp-backtrace]: https://github.com/esp-rs/esp-backtrace
 [esp-ieee802154]: https://github.com/esp-rs/esp-ieee802154
+[esp-openthread]: https://github.com/esp-rs/esp-openthread
 [esp-println]: https://github.com/esp-rs/esp-println
 [esp-storage]: https://github.com/esp-rs/esp-storage
 [embedded-storage]: https://github.com/rust-embedded-community/embedded-storage
@@ -112,7 +124,7 @@ The **M**inimum **S**upported **R**ust **V**ersion is `1.67.0` for all packages.
 
 RISC-V is officially supported by the official Rust compiler, however, it should be noted that targeting the Xtensa ISA currently requires the use of the [esp-rs/rust] compiler fork. Our recommend method of installation is [espup].
 
-When targetting the RISC-V architecture *and* using a `stable` Rust release, it is necessary to set `RUSTC_BOOTSTRAP=1` in order to build successfully; this is not required when using a `nightly` release or when targeting Xtensa.
+When targetting the RISC-V architecture _and_ using a `stable` Rust release, it is necessary to set `RUSTC_BOOTSTRAP=1` in order to build successfully; this is not required when using a `nightly` release or when targeting Xtensa.
 
 [esp-rs/rust]: https://github.com/esp-rs/rust
 [espup]: https://github.com/esp-rs/espup

diff --git a/esp32c2-hal/src/lib.rs b/esp32c2-hal/src/lib.rs
@@ -51,23 +51,6 @@
 //! [embassy]: https://github.com/embassy-rs/embassy
 //! [`ufmt_write::uWrite`]: https://docs.rs/ufmt-write/latest/ufmt_write/trait.uWrite.html
 //! [`defmt::Format`]: https://docs.rs/defmt/0.3.5/defmt/trait.Format.html
-//!
-//! ### Supported Image Formats
-//!
-//! This HAL supports building multiple different application image formats. You
-//! can read about each below.
-//!
-//! The ESP-IDF Bootloader format is used unless some other format is specified
-//! via its feature.
-//!
-//! #### ESP-IDF Bootloader
-//!
-//! Use the second-stage bootloader from [ESP-IDF] and its associated
-//! application image format. See the [App Image Format] documentation for more
-//! information about this format.
-//!
-//! [ESP-IDF]: https://github.com/espressif/esp-idf
-//! [App Image Format]: https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/system/app_image_format.html
 #![no_std]
 #![doc(html_logo_url = "https://avatars.githubusercontent.com/u/46717278")]
 

diff --git a/esp32c3-hal/src/lib.rs b/esp32c3-hal/src/lib.rs
@@ -49,30 +49,6 @@
 //! [embassy]: https://github.com/embassy-rs/embassy
 //! [`ufmt_write::uWrite`]: https://docs.rs/ufmt-write/latest/ufmt_write/trait.uWrite.html
 //! [`defmt::Format`]: https://docs.rs/defmt/0.3.5/defmt/trait.Format.html
-//!
-//! ### Supported Image Formats
-//!
-//! This HAL supports building multiple different application image formats. You
-//! can read about each below.
-//!
-//! The ESP-IDF Bootloader format is used unless some other format is specified
-//! via its feature.
-//!
-//! #### ESP-IDF Bootloader
-//!
-//! Use the second-stage bootloader from [ESP-IDF] and its associated
-//! application image format. See the [App Image Format] documentation for more
-//! information about this format.
-//!
-//! [ESP-IDF]: https://github.com/espressif/esp-idf
-//! [App Image Format]: https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/system/app_image_format.html
-//!
-//! #### MCUboot
-//!
-//! Use the MCUBoot bootloader and its associated image format. See the [MCUBoot
-//! design document] for more information about this format.
-//!
-//! [MCUBoot design document]: https://docs.mcuboot.com/design.html
 
 #![no_std]
 #![doc(html_logo_url = "https://avatars.githubusercontent.com/u/46717278")]

diff --git a/esp32c6-hal/src/lib.rs b/esp32c6-hal/src/lib.rs
@@ -51,23 +51,6 @@
 //! [embassy]: https://github.com/embassy-rs/embassy
 //! [`ufmt_write::uWrite`]: https://docs.rs/ufmt-write/latest/ufmt_write/trait.uWrite.html
 //! [`defmt::Format`]: https://docs.rs/defmt/0.3.5/defmt/trait.Format.html
-//!
-//! ### Supported Image Formats
-//!
-//! This HAL supports building multiple different application image formats. You
-//! can read about each below.
-//!
-//! The ESP-IDF Bootloader format is used unless some other format is specified
-//! via its feature.
-//!
-//! #### ESP-IDF Bootloader
-//!
-//! Use the second-stage bootloader from [ESP-IDF] and its associated
-//! application image format. See the [App Image Format] documentation for more
-//! information about this format.
-//!
-//! [ESP-IDF]: https://github.com/espressif/esp-idf
-//! [App Image Format]: https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/system/app_image_format.html
 #![no_std]
 #![doc(html_logo_url = "https://avatars.githubusercontent.com/u/46717278")]
 

diff --git a/esp32h2-hal/src/lib.rs b/esp32h2-hal/src/lib.rs
@@ -51,23 +51,6 @@
 //! [embassy]: https://github.com/embassy-rs/embassy
 //! [`ufmt_write::uWrite`]: https://docs.rs/ufmt-write/latest/ufmt_write/trait.uWrite.html
 //! [`defmt::Format`]: https://docs.rs/defmt/0.3.5/defmt/trait.Format.html
-//!
-//! ### Supported Image Formats
-//!
-//! This HAL supports building multiple different application image formats. You
-//! can read about each below.
-//!
-//! The ESP-IDF Bootloader format is used unless some other format is specified
-//! via its feature.
-//!
-//! #### ESP-IDF Bootloader
-//!
-//! Use the second-stage bootloader from [ESP-IDF] and its associated
-//! application image format. See the [App Image Format] documentation for more
-//! information about this format.
-//!
-//! [ESP-IDF]: https://github.com/espressif/esp-idf
-//! [App Image Format]: https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/system/app_image_format.html
 #![no_std]
 #![doc(html_logo_url = "https://avatars.githubusercontent.com/u/46717278")]
 

diff --git a/esp32s3-hal/src/lib.rs b/esp32s3-hal/src/lib.rs
@@ -57,23 +57,6 @@
 //! [embassy]: https://github.com/embassy-rs/embassy
 //! [`ufmt_write::uWrite`]: https://docs.rs/ufmt-write/latest/ufmt_write/trait.uWrite.html
 //! [`defmt::Format`]: https://docs.rs/defmt/0.3.5/defmt/trait.Format.html
-//!
-//! ### Supported Image Formats
-//!
-//! This HAL supports building multiple different application image formats. You
-//! can read about each below.
-//!
-//! The ESP-IDF Bootloader format is used unless some other format is specified
-//! via its feature.
-//!
-//! #### ESP-IDF Bootloader
-//!
-//! Use the second-stage bootloader from [ESP-IDF] and its associated
-//! application image format. See the [App Image Format] documentation for more
-//! information about this format.
-//!
-//! [ESP-IDF]: https://github.com/espressif/esp-idf
-//! [App Image Format]: https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/system/app_image_format.html
 #![no_std]
 #![doc(html_logo_url = "https://avatars.githubusercontent.com/u/46717278")]