在网上找了许多关于串口通讯的代码,要么使用不方便,要么功能太多,使用复杂.只好自己编写了一个,功能不多,但能够很好的实现串口通讯的基本功能-The Internet to find a lot of code on the serial communication, or inconvenient to use, or too many features, the use of complex. Had to have written one, function much, but can ac