I am attempting to verify the functionality of the communication ports available on the Apalis TK1 eval board.
I have been unable to run the loopback test described here: SPI (Linux)
When running spidev_test I receive the following response rather than the transmitted hex values.
./spidev_test -D /dev/spidev0.0
spi mode: 0
bits per word: 8
max speed: 500000 Hz (500 KHz)
can’t send spi message: Invalid argument
Looking in /dev, the following devices are available: spidev0.0, spidev1.2, spidev3.0