串口监视，可以用来监视串口接收和发送的数据-Serial surveillance, surveillance can be used to send and receive serial data

有名的串口监视工具 portmon 很多的好的串口通讯协议一开始都是靠监视别人的成熟实例而来的-Well-known serial port monitoring tool for a lot of good portmon serial communication protocols are one started surveillance on other people

一个端口映射程序,支持TCP，UDP，需要的可以研究一下-portmap,

freescale的SPI通信程序, 其中端口PORTM用作SPI的第二功能，发送的数据若能接收则在端口B的LED灯上显示-freescale the SPI communication program, including work as an SPI port PORTM second feature, send the data received in the port B if the LED lights on the dis