This is related to the Getting WaveShare High-Precision AD/DA Expansion Board to work - #19 by CameronDiver post.
I created a new post to narrow it down to just SPI and not include the board I am attempting to communicate with, since SPI itself seems to be my current sticking point.
Currently, I am measuring the SCK directly from the RPi with a scope probe, ground attached, and no additional boards. The noise I mentioned was very low level noise.
I also tried it with only “wifi-connect” in the docker-compose.yml file.
I still see spi_bcm2835 , bcm2835_v4l2 , v412_common , and spidev .when I run lsmod.
I also still see
/dev/spidev0.0
/dev/spidev0.1
And when I run
echo “abcdefghijklmnopqrstuvwxyz” > /dev/spidev0.0
I still don’t see any signal on the SCK pin of the RPi.
Do you have a setup that is known good to get the SPI to work? Once I have something like this I think I can solve my issues with the WaveShare A/D board.
I am at a loss right now. So any help you can give would be greatly appreciated,