一个利用CH452键盘管理芯片的键盘功能模块，采用89S52单片机利用中断和SPI接口有效节约了单片机的IO口资源。-CH452 keyboard management chips using a keyboard function modules, using 89S52 microcontroller interrupt and SPI interfaces using the effective conservation of the microcontroller IO port res

DSP2812处理器硬件SPI控制函数，包含发送接收、中断等，可自行设置波特率。-DSP2812 processor hardware SPI control functions, including to send and receive, interrupt, etc., are free to set the baud rate.