01-08-2017, 01:24 PM
spi.xfer() is transmitting and receiving at the same time, full-duplex transfer.
If you don't see /dev/spi0.0 on your board, it is probably that you don't use an image using longsleep's kernel, because SPIs have been added in the DT of longsleep several months ago.
If you don't see /dev/spi0.0 on your board, it is probably that you don't use an image using longsleep's kernel, because SPIs have been added in the DT of longsleep several months ago.