Some peripheral devices only use 3 wires for SPI communication, CSEL, SCK and SDIO.
for example: https://www.st.com/resource/en/datasheet/cd00047926.pdf
The SpiPeripheral could be modified so that the input could be made an Inout, and one of the modes could be that 3 wire is enabled or disabled
Some peripheral devices only use 3 wires for SPI communication, CSEL, SCK and SDIO.
for example: https://www.st.com/resource/en/datasheet/cd00047926.pdf
The SpiPeripheral could be modified so that the input could be made an Inout, and one of the modes could be that 3 wire is enabled or disabled