MPC8548上用GPIO口模拟的SPI控制器.包括初始化,单字节读写,多字节读写等等.调试通过，绝对可用.-MPC8548 using GPIO I SPI controller simulation. Including initialization, single-byte read and write, and so on multi-byte read and write. Debug through absolutely available.

This file contains routines to write to and read from the I2C bus using the GPIO pins of the CS5530. -This file contains routines to write to and read from the I2C bus using the GPIO pins of the CS5530.