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Diffstat (limited to 'tests/spi-master/README.md')
| -rw-r--r-- | tests/spi-master/README.md | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/tests/spi-master/README.md b/tests/spi-master/README.md new file mode 100644 index 0000000..fddca8d --- /dev/null +++ b/tests/spi-master/README.md @@ -0,0 +1,25 @@ +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 SCK 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 -l 4 2>/dev/null | grep -- -data |