单片机SPI通信测试程序，使用SPI控制器读写SPI总线的外部设备-MCU SPI communication test program, the use of the the SPI controller read and write external SPI bus device

ZSP 500 I2C 控制器驱动，I2C 控制器的主从模式下的基本读写操作，包括测试程序。-ZSP 500 I2C controller driver, I2C master and slave mode controller basic read and write operations, including testing procedures.