SPI SCK setting

[Dmkrd]

Good afternoon!
I ask for advice -
Is it possible to set SCK high level width and SCK low level width in the SPI settings? communication with an external device via non-standard SPI is highly dependent on the pulse width. example on the screen
Thank you!

[earlephilhower]

Probably not, but feel free to read thru the datasheet for the SPI block registers: https://datasheets.raspberrypi.com/rp2040/rp2040-datasheet.pdf

You might be able to write a PIO program to do it, though. Run the PIO at several multiples of the SPI clock frequency you want, then use a sideset to create the clock while shifting in/out at appropriate. If it's really as slow as your image (~10ms period) it shouldn't be too bad.

[Dmkrd]

Thanks a lot!!