gprs_test.c

GPRS通信源码,本下载源码包是基于英蓓特教学实验平台：EduKit-III+S3C2410子板 以及RealView MDK开发环境下的GPRS通信程序

/*********************************************************************************************
* File：	gprs_test.c
* Author:	embest
* Desc：	gprs test program
* History:	
*********************************************************************************************/

/*------------------------------------------------------------------------------------------*/
/*	 								include files						 				    */
/*------------------------------------------------------------------------------------------*/
#include "2410lib.h"
#include "gprs_test.h"

/*------------------------------------------------------------------------------------------*/
/*	 								global variables					 				    */
/*------------------------------------------------------------------------------------------*/
INT32T f_nSelectUart;				

/*********************************************************************************************
* name:		uart0_uart1_tran
* func:		commnunication with the uart0 and uart1
* para:		none
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void gprs_test(void)//uart0_uart1_tran
{
    int i,nSetBaud;
	char cInputChar;					// user input char
	char nStrWait[50] = "AT command >";
	char LF[1] = {0x0A};
	char CR[1] = {0x0D};
	char *pPt;
	unsigned char * baud_sel[][2]={
			        "0","1200",
			        "1","2400",
			        "2","4800",
			        "3","9600",
					0,0};
                
	uart_init(PCLK, 115200, UART2);		// initialize the UART2 channel
	uart_select(0);						// select the control uart channel
    uart_printf("\n GPRS Modem Communication Test Example\n");
	uart_printf(" %s",__DATE__);
	uart_printf(" %s\n",__TIME__);
	
	i = 0;
	while(1)
	{  //display menu
		uart_printf("    %s --- %s\n\r",baud_sel[i][0],baud_sel[i][1]);
		i++;
		if((int)(baud_sel[i][0]) == 0)	break;
	}
	uart_printf(" Baud rate select for GPRS modem: ");

	cInputChar = uart_getch_c();

	uart_printf("%c\n",cInputChar);

	nSetBaud = (int)(baud_sel[cInputChar-0x30][1]);
	uart_change_baud(UART2,atoi(nSetBaud));
	
	uart_printf(" %s",nStrWait);
	i = 160;
	pPt=nStrWait;

	while(1)				// SB1202/SB1203 to exit board test
	{
		cInputChar = uart_getch_c();
				      	
		if (f_nSelectUart == UART0) 
		{
			uart_select(2);							// send to another uart
		}
		if (f_nSelectUart == UART2) 
		{
			uart_select(0);							// send to another uart
			*pPt++ = cInputChar;
			if((*(pPt-2)==0x0d)&(cInputChar==0x0A))	// Format: DATA 0xd0xa 
			{
				pPt = nStrWait;
				uart_sendbyte(cInputChar);
				uart_getstring_c(pPt);				// waiting for response
				
				if(!strcmp(pPt,"OK"))
				{
					uart_sendstring("OK\n");
				}
			 	if(!strcmp(pPt,"RING"))
				{
					uart_sendstring("Someone call in...\n");
					rGPBCON = rGPBCON & 0xFFFFFC|1;	// output
					rGPBDAT = rGPBDAT & 0xFFFFFE;	// open beep
					delay(1200);
					rGPBDAT = rGPBDAT & 0xFFFFFE|1;	// close beep
				}
				else								// other string
				{
					continue;
				}
					
			}
		}
		uart_sendbyte(cInputChar);
	}
	
	uart_select(0);
	uart_printf(" end.\n");
}

/*********************************************************************************************
* name:		uart_getch_c
* func:		Get a character from the uart and sign the channel
* para:		none
* ret:		get a char from uart channel
* modify:
* comment:		
*********************************************************************************************/
char uart_getch_c(void)
{
	while(1)
	{
		if(rUTRSTAT0 & 0x1)				// if receive data ready
		{
			f_nSelectUart = UART0;
			return RdURXH0(); 
		}
 		if(rUTRSTAT2 & 0x1)				// if receive data ready
		{
			f_nSelectUart = UART2;
			return rURXH2;
		}
	}	
   
}

/*********************************************************************************************
* name:		uart_getstring_c
* func:		Get string from uart channel and store the result to input address (*pString)
* para:		pString	-- 	input, string
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void uart_getstring_c(char *pString)
{
    char *string2 = pString;
    char c;
    while((c = uart_getch_c())!='\r')
    {
        if(c=='\b')
        {
            if( (int)string2 < (int)pString )
            {
                // uart_printf("\b \b");
                pString--;
            }
        }
        else 
        {
            *pString++ = c;
            //uart_sendbyte(c);
        }
    }
    *pString='\0';
    //uart_sendbyte('\n');
}