olsndot/tests/spi-master

SPI master mode tests

While some of the disco boards have some form of spi device onboard, which would, on the face of it, make testing easy, it's a different device on each board, and there are boards without it.

Instead, use a known SPI peripheral on all boards, and require/expect a known fixed SPI slave device. Use a soft controller SPI slave device for the far side, for double the test coverage!

the "trigger" pin is bounced when each iteration of the test code starts, allowing synchronization with a sigrok script that helps assure that results are as expected.

Debug is via SWO wherever possible, PA2 (tx only) on less capable cores

Pinouts: (red) (orange) (yellow)(brown) (black) board CLK MISO MOSI CS periph trigger f4-disco PB13 PB14 PB15 PB12 spi2 PB11 l1-disco PB13 PB14 PB15 PB12 spi2 PB11

Notes for monitoring with sigrok: $ sigrok-cli -d fx2lafw -C D0=TRIG,D1=CS,D2=CLK,D3=MISO,D4=MOSI -c samplerate=12Mhz:captureratio=4 --time=150ms -t TRIG=r -P spi:clk=CLK:miso=MISO:mosi=MOSI -A spi=mosi-data