I have a NanoPi Neo Core and I'd like to analyse the SPI controller driver and why it toggles the lines the way it does.
In the overlay file, all I see are mentions to 'spidev'.
Where can I find out why the data lines shown below toggle the way they do? I.e. chip select goes low way before the clock line. The MISO line has a droop to GND briefly and the CLK line hangs high for a while before toggling...
Thanks forum :).
YELLOW: CS
PURPLE: MOSI
BLUE: MISO
GREEN: CLK
EDIT: I'm sending two bytes, 0xDA, 0x00 at spi mode 3. Ignore the decoder, it was set to read LSB first.