点阵液晶SPI转并口的Proteus仿真，并附51单片机模拟SPI主机控制液晶，有效地减少并行液晶对IO口的占用，调试非常方便，曾经在MSP430上实现移植-The dot matrix LCD SPI transfer Proteus simulation of the parallel port, along with 51 single-chip analog SPI host to control the liquid crystal, effectively reducing the parallel liquid crystal occupied the mouth of the IO, debugging is very convenient, once the MSP430 transplantation