cermak

Anything I can do to expedite this?

@KurtE thanks, thats good to know! If you have any feedback on the PR as well, I'd also certainly appreciate it. Thanks again!

It seems that this is not straightforward to do a minimal example of this, as it requires modifying SPIClass::transfer, since that function explicitly sets the frame size to 7 and DMA to single-byte transfers. I need to be able to do 16-bit...

@KurtE Thanks! I misread the pinout. Pin 38 works too! I didn't realize that both pins were PCS0. (I will update the above post to note that too). I think I've got at least the beginnings of a handle on how to accomplish some what I'm going for...

Thanks so much @jmarsh and @sicco! @jmarsh that was a very good suggestion*, and I can indeed get CS0 to toggle on each byte. #include <SPI.h> #include <EventResponder.h> #define BUF_SIZE 10 uint16_t spi_tx_buf[BUF_SIZE]; uint16_t...

@jmarsh i'd be happy to get this to work with any pin as DMA SPI-controlled CS. (My impression has been that the SPI library mostly doesn't really use the SPI peripheral to control CS pins; all the examples I've seen just toggle CS as a GPIO...

I've roughly got the asynchronous SPI.transfer(tx_buf, rx_buf, sizeof(tx_buf), event_responder) call to work , but I don't know how to get a chip-select line to toggle in between bytes/uint16s/uint32s (a feature I need to make some DACs and ADCs...