用单片机实现GPRS modem通讯的源程序,实现了ppp拨号,tcp/udp等通讯协议包含了串口控制协议-with MCU GPRS modem communications program and realized the ppp dial-up, tcp / udp communications Agreement contains the serial control protocol

PPP拨号代码，使用freescale单片机开发，实际验证已经通过！

PPP拨号协议简单实现 适用于MCU和无系统的嵌入式应用-PPP dial-up agreement applies to the realization of a simple MCU and embedded systems applications

单片机 ppp拨号驱动程序,简易的PPP处理逻辑，适合单片机或者RAM较小的处理器-SCM ppp dial driver, simple PPP processing logic for a smaller processor chip or RAM