MicroController Thanks for the response!! I did come across that--specifically for the s3, it doesn't seem to be used and leads to an empty function. From what I can tell in the docs, the s3 slave does not depend on having a predetermined bitlen stored anywhere, though there is the option to record ...

Hello,

I'm attempting to write a SPI Slave Driver for an OS which doesn't yet support that--Zephyr--and am starting by manually toggling registers to accomplish a non-dma, CPU-controlled full-duplex slave single transfer on the ESP32s3.

The pseudocode:


// zero out all registers
zero_regs ...