Add basic SPI support
SPI1-SPI3 support, with pins implemented for Port A, B, C.
Example using SPI3 to talk to LSM9DS1 IMU.
Todo: Support Slave Mode and maybe hardware NSS.
SPI1-SPI3 support, with pins implemented for Port A, B, C.
Example using SPI3 to talk to LSM9DS1 IMU.
Todo: Support Slave Mode and maybe hardware NSS.