Add arduino support for the ESP32-C6

[SomeSpaceNerd]

Could arduino framework support please be added for the ESP32-C6? The latest ESP32 arduino core supports the ESP32-C6 and it is becoming an increasingly popular chip.

[znmeb]

This is a fortunate coincidence - just today I was testing an ESP32-C6-DevKitC-1 and discovered it was supported in Arduino but not PlatformIO. But why does PlatformIO need to support this board via Arduino? Doesn't the Espressif toolchain support it? Their documentation seems to suggest so. Is an Arduino build the only way to get debugging on it?

P.S. My board has two USB ports on it. One presents as /dev/ttyACM0 on Linux and is the main port Arduino uses to flash the device. The other is a USB bridge from a UART and presents as /dev/ttyUSB0. That port receives the output of a "Hello world" program that does Serial.println("Hello World");.

[SomeSpaceNerd]

But why does PlatformIO need to support this board via Arduino? Doesn't the Espressif toolchain support it?

I would like to have arduino support added because it allows you to make projects that support many microcontrollers outside of the ESP32 ecosystem.

[znmeb]

But why does PlatformIO need to support this board via Arduino? Doesn't the Espressif toolchain support it?

I would like to have arduino support added because it allows you to make projects that support many microcontrollers outside of the ESP32 ecosystem.

I don't know the internals of either PlatformIO or Arduino well enough to tell if this is a documentation issue, a bug, or a feature that needs to be planned and implemented. I do see my board in the output of pio boards > board_list.txt so I'm inclined to say documentation / bug, not a missing feature.

board_list.txt

esp32-c6-devkitc-1                   ESP32C6  160MHz       8MB      320KB   Espressif ESP32-C6-DevKitC-1

[SomeSpaceNerd]

I was doing some testing with custom board JSON for a Seeeduino XIAO esp32c6 and the main issue seems to be the absence of a "platformio-build-esp32c6.py" build script. I am not sure if that's an issue with platformio or the ESP32 toolchain itself because it's looking for a PIO dedicated script that's contained in the tools directory of the esp32 arduino core.

[znmeb]

I opened an issue on the compile failure - see #1473 if you're interested in the gory details.

[valeros]

Support for ESP32-C6 was added in Arduino core v3 and this version is not supported at the moment. Any progress with v3.x is tracked here #1225