一个串口测试程序，测试串口与目标板机上的串口通信功能。适合嵌入式学习工员。-A serial port test program, test the serial port and serial port on the target machine communication. Members work for embedded learning.

DTMF软解码算法+++VC验证程序 为开发员提供源代码!-DTMF soft decoding algorithm+++ VC verification process