gprs.c

自己写的一个GPRS驱动程序,使用AT指令,串口登陆

//*****************************************************************
// 	function : ds18b20 driver
//  editor   : zhao wei
//	date     : 2008-11-24
//  description:it is used to driver gprs send temperature data to remote server
//*****************************************************************


#include "..\ucos-ii\includes.h"
#include "..\ucos-ii\datatype.h"
#include "..\44box\44b.h"
#include <string.h>



char *AT_Command[12] = {
	                     		"at\r\n",                  //判断是否连线
	                     		"at+csq\r\n",              //判断信号质量
	                     		"at+creg?\r\n",            //检查模块网络注册情况
	                     		"at+wopen=1\r\n",          //打开OPEN AT协议
	                     		"AT+WIPCFG=1\r\n",         //启动TCP协议
	                     		"AT+WIPBR=1,6\r\n",        //打开GPRS
	                     		"at+wipbr=2,6,11,\"CMNET\"\r\n",//设置GPRS APN名称
	                     		"AT+WIPBR=4,6,0\r\n",      //启动GPRS客户端
	                     		"at+wipcreate=2,1,\"219.142.140.11\",34560\r\n",//设置IP和端口号
	                     		"at+wipdata=2,1,1\r\n",    //连接
	                     		"+++\r\n",                 //返回AT命令状态
	                     		"AT+WIPCLOSE=2,1\r\n"      //关闭连接
	                     	};
	                     	
char chEchoData[20] = {0};



//------------------------------------------------------
// function : send command
// input    : AT instruction
// output   : none
// description: send AT instruction wait for echo if succeed
//------------------------------------------------------
void GPRS_Cmd(char *pt)
{
	int i=0;

  while(1)
  { 
  	 if(pt[i] != '\0')
  	 {
  	 	Uart_SendByte(pt[i]);
     	i++;	
     }
     else
     { 
//     	Uart_GetString(chEchoData);
     	break;
     }
   }
}


//------------------------------------------------------
// function : GPRS initialize
// input    : none
// output   : none
// description: send AT instruction initialize GPRS communition
//------------------------------------------------------
void GPRS_Init(void)
{
	Uart_Select(0);					//选择串口0
	Uart_Init(0,9600);      //9600N81
	Delay(5000);
	
	GPRS_START:             //为了方便调试指令,没有使用循环语句
	GPRS_Cmd(AT_Command[0]); 
//	if(memcmp(chEchoData,"OK",2) != 0)
//		goto GPRS_START;
 	Delay(5000);
 	
 	GPRS_Cmd(AT_Command[1]);
//	if(memcmp(chEchoData,"OK",2) != 0)
//		goto GPRS_START;
 	Delay(5000);
 	
 	GPRS_Cmd(AT_Command[2]);
//	if(memcmp(chEchoData,"OK",2) != 0)
//		goto GPRS_START;
 	Delay(5000);
 	
 	GPRS_Cmd(AT_Command[3]);
//	if(memcmp(chEchoData,"OK",2) != 0)
//		goto GPRS_START;
 	Delay(5000);
 	
 	GPRS_Cmd(AT_Command[4]);
//	if(memcmp(chEchoData,"OK",2) != 0)
//		goto GPRS_START;
 	Delay(5000);
 	
 	GPRS_Cmd(AT_Command[5]);
//	if(memcmp(chEchoData,"OK",2) != 0)
//		goto GPRS_START;
 	Delay(5000);
 	
 	GPRS_Cmd(AT_Command[6]);
//	if(memcmp(chEchoData,"OK",2) != 0)
//		goto GPRS_START;
 	Delay(5000);
 	
 	GPRS_Cmd(AT_Command[7]);
//	if(memcmp(chEchoData,"OK",2) != 0)
//		goto GPRS_START;
 	Delay(5000);
 	
 	GPRS_Cmd(AT_Command[8]);
//	if(memcmp(chEchoData,"OK",2) != 0)
//		goto GPRS_START;
 	Delay(5000);
 	
 	GPRS_Cmd(AT_Command[9]);
// 	if(memcmp(chEchoData,"CONNECT",2) != 0)
//		goto GPRS_START;
 	Delay(5000);
}


//------------------------------------------------------
// function : return AT command mode
// input    : none
// output   : none
// description: return AT mode ,you can input AT command
//------------------------------------------------------
void GPRS_ReturnAT(void)
{
	
	GPRS_Cmd(AT_Command[10]);
 	Delay(5000);
}


//------------------------------------------------------
// function : GPRS communition close
// input    : none
// output   : none
// description: close tcp link
//------------------------------------------------------
void GPRS_Close(void)
{
 	GPRS_START:
	GPRS_Cmd(AT_Command[11]);
	if(memcmp(chEchoData,"OK",2) != 0)
		goto GPRS_START;
 	Delay(5000);
}


//------------------------------------------------------
// function : send data
// input    : string data
// output   : none
// description: send data to server
//------------------------------------------------------
void GPRS_SendData(char *pd)
{
	
//	GPRS_Init();
	Uart_SendString(pd);
	Uart_SendByte(0x1A);  //ctrl+z   26
	Delay(5000);
	
}