/************************************************ *  GPRS demo, use ppp to connect internet *  use ttyS1 to ctrol GPRS *  by Zou jian guo <ah_zou@163.com>    *  2004-11-02 **************************************************/#include <termios.h>#include <stdio.h>#include <unistd.h>#include <fcntl.h>#include <time.h>//#include <sys/signal.h>#include <pthread.h>#include "tty.h"#include "gprs.h"/*--------------------------------------------------------*/#define ENDMINITERM 27 /* ESC to quit miniterm */#define FALSE		0#define TRUE  		1/*--------------------------------------------------------*/volatile int STOP=FALSE;int GET_GPRS_OK=FALSE;int baud=B9600;int get_baudrate(int argc,char** argv);char * cmd[20]={		"at",		"ate1",		"at+chfa=1", 			/*設置通話通道為1,AT+CHFA 命令切換主副音頻通道*/		"at+clvl=100",			/*設置受話器音量最大, AT+CLVL 命令可以調節輸出音頻信號增益*/		"at+cmic=1,10"			/*設置通道1的話筒增益*///		"atd12345678\r",};void * keyshell() ;/*--------------------------------------------------------*//*--------------------------------------------------------*//* modem input handler *//*void* gprs_show(void * data){	while(1){		if(GET_GPRS_OK){			GET_GPRS_OK=FALSE;//			printf("%s",GPRS_BUF);//			GPRS_parse(GPRS_BUF,&gps_info);//			GPRS_show();		}		usleep(100);		if(STOP)break;	}}*//*--------------------------------------------------------*//* modem input handler */void* gprs_read(void * data){	int i=0;	char c;	char buf[1024];  	printf("\nread modem\n");	  	while (STOP==FALSE) 	{					    	tty_read(&c,1); 			printf("%c",c);		}  	printf("exit from reading modem\n");  	return NULL; }/*--------------------------------------------------------*/int main(int argc,char** argv){	int ok; 	pthread_t th_a, th_b, th_show; 	void * retval;			if(argc < 2) 		printf ("  Default baudrate is 9600 bps. If not, please enter the baudrate as a parameter\n");	else		baud=get_baudrate(argc, argv);	tty_init();  	pthread_create(&th_a, NULL, keyshell, 0);  	pthread_create(&th_b, NULL, gprs_read, 0);//  	pthread_create(&th_show, NULL, gprs_show, 0);		while(!STOP){		usleep(100000);	}  	tty_end();  	exit(0); }int get_baudrate(int argc,char** argv){	int v=atoi(argv[1]);	 switch(v){		case 4800:			return B4800;					case 9600:			return B9600;					case 19200:			return B19200;					case 38400:			return B38400;					case 57600:			return B57600;					case 115200:			return B115200;		default:			return -1;	 } 	 }