esp32-led-strip-sdk

esp32-led-strip-sdk

This example demonstrates how to integrate with the ESP-IDF SDK via CMake and how to use the existing LED strip library to control WS8212 lights from Swift. This example is specifically made for the RISC-V MCUs from ESP32 (the Xtensa MCUs are not currently supported by Swift).

Requirements

• Set up the ESP-IDF development environment. Follow the steps in the ESP32-C6 "Get Started" guide.

  • Make sure you specifically set up development for the RISC-V ESP32-C6, and not the Xtensa based products.

• Before trying to use Swift with the ESP-IDF SDK, make sure your environment works and can build the provided C/C++ sample projects, in particular:

  • Try building and running the "get-started/blink" example from ESP-IDF written in C.

Building

• Make sure you have a recent nightly Swift toolchain that has Embedded Swift support.
• If needed, run export.sh to get access to the idf.py script from ESP-IDF.
• Specify the nightly toolchain to be used via the TOOLCHAINS environment variable and the target board type by using idf.py set-target.

$ cd esp32-led-strip-sdk
$ export TOOLCHAINS=...
$ . <path-to-esp-idf>/export.sh
$ idf.py set-target esp32c6
$ idf.py build

Running

• Connect the ESP32-C6-DevKitC-1 board over a USB cable to your Mac.
• Wire up an external WS8212 LED strip and use GPIO pin 0 as the data pin. You might need to use a level shifter.
• Use idf.py to upload the firmware and to run it:

$ idf.py flash

• The LED strip should now be animating a sequence of random colors moving in one direction.

Simulating in VS Code

• Build the project, to generate binaries for simulation
• Install Wokwi for VS Code.
• Open the diagram.json file.
• Click the Play button to start simulation.
• Click the Pause button to freeze simulation and display states of GPIOs.