通过创建多线程的方法来实现arm板上的多串口的并行通信，自己编写的，并在板上测试过的，但是针对你的板子，要自己设定。-By creating multi-threaded approach to achieve multi-arm board parallel port communication, I have written and tested on the board, but for your board, to set their own.

两台计算机间用并行打印口通信的源程序,可以 进行并口的开发-Between the two computers with parallel print port communication source program, can undertake the development of the parallel port,,