ESP32 Forum

Hello, I have 7x4 LED matrix connected directly to the GPIOs of an esp32c3. I was trying to offload the CPU and run them with the DMA. The idea was to read a uin32_t from the memory and write it to the GPIO_OUT_REG using DMA.
I thought it might be possible because GPIO_OUT_REG is within the peripheral address space, and as I understand, GDMA has access to it. However, I am not sure how to initialize and use GDMA for this purpose and I can't find any example.

Any help is welcome, thank you!

Sorry, the ESP32 series of chips don't allow DMA'ing to random memory addresses. Other ESP32 chips have some sort of parallel IO you might be able to use (I2S, parlio, ...) but the C3 doesn't have that either. Best you could do is to perhaps use the quad mode of the SPI peripheral to get up to 4 lines, but if that's enough and you still need DMA, I suggest switching to the ESP32, ESP32-S2 or S3, or the C6.