risc-v/esp_<rmt|ws2812>: Implement the RMT peripheral for all the supported Risc-V ESP32 devices#11721
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xiaoxiang781216 merged 5 commits intoapache:masterfrom Feb 20, 2024
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WS2812 data is encoded into RMT items according to the RMT clock source. This commit makes it by using the actual clock source in spite of a pre-defind value.
This enables the on-board WS2812 addressable LED to be driven by the RMT peripheral with the `rmt` defconfig.
This commit implements the RMT peripheral for all the supported Espressif's RISC-V devices. It also implements the support for the WS2812 addressable RGB LED using the RMT peripheral.
This enables using the example without needing to pass a different argument for the receiver.
Add documentation about the RMT peripheral (and using it to drive WS2812 addressable RGB LEDs) for ESP32-S2, ESP32-S3, ESP32-C3, ESP32-C6 and ESP32-H2.
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Summary
Documentation: Add entry about the RMT peripheral for the ESP32 family
risc-v/esp_<rmt|ws2812>: Implement the RMT peripheral for ESP32 RVs
boards/esp32s2-saola-1: Change the RMT output pin to the on-board LED
xtensa/esp_ws2812: Get actual RMT clock to encode WS2812 data
Please note that this PR is very similar to the one submitted to provide the RMT support for xtensa-based ESP32 devices: #11428 (this includes the sources of the common driver).
Impact
Implement the common driver for the RMT peripheral on ESP32 Risc-V-based devices.
Testing
Internal CI testing + ESP32-S2-Saola-1 board and ESP32-S3-DevKitC-1 v1.0 board (loopback test + WS2812 LED strip)