sim900芯片—GPRS打电话和发短信应用程序

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Cross compiler：arm-linux-gcc-4.5.4
Linux kernel version：linux-3.0
Development board：fl2440
Author: Yuzhonghan <754270866@qq.com>

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一：AT命令
使用sim900发短信打电话之前，必须了解at命令怎么使用。下面是一些常用的命令
AT+CMGC Send an SMS command（发出一条短消息命令）
AT+CMGD Delete SMS message（删除 SIM 卡内存的短消息）
AT+CMGF Select SMS message formate （选择短消息信息收发格式： 0-PDU;1-文本）
AT+CMGL List SMS message from preferred store（列出 SIM 卡中的短消息
AT+CMGR Read SMS message（读短消息）
AT+CMGS Send SMS message（发送短消息）
AT+CMGW Write SMS message to memory（向 SIM 内存中写入待发的短消息）
AT+CMSS Send SMS message from storage（从 SIN |M 内存中发送短消息）
AT+CNMI New SMS message indications（显示新收到的短消息）
AT+CPMS Preferred SMS message storage（选择短消息内存）
AT+CSCA SMS service center address（短消息中心地址）
AT+CSCB Select cell broadcast messages（选择蜂窝广播消息）
AT+CSMP Set SMS text mode parameters（设置短消息文本模式参数）
AT+CSMS Select Message Service（选择短消息服务）
AT+CNMI=2,1,0,0,0 //设置收到新短信存于SIM卡中并发CMTI通知
+CMTI:”SM”,1 //收到了短信，自动弹出，其中1表示存在SIM中的序号
AT+CMGR=1 //读取短信，其中1要与上面序号对应
AT+CMGD=1 //删除短信，其中1为短信序号
ATD188********; //拨打电话，后面一定要加‘；’
ATA //接听电话
ATH //挂断电话

在这博主所使用串口连接板子输入 microcom -s115200 /dev/ttyS1 这里我链接的串口是dev目录下的ttyS1，串口波特率是115200。

然后可以使用 AT指令测试。

PS:（这里可以根据自己的串口信息进行更改。）

以下是发送短信和拨打电话的C代码：

  1 /*********************************************************************************  2  *      Copyright:  (C) 2016 Yuzhonghan<754270866@qq.com>  3  *                  All rights reserved.  4  *  5  *       Filename:  gprs.c  6  *    Description:  This file   7  *                   8  *        Version:  1.0.0(07/30/2016)  9  *         Author:  Yuzhonghan <754270866@qq.com> 10  *      ChangeLog:  1, Release initial version on "07/30/2016 05:23:56 PM" 11  *                  12  ********************************************************************************/ 13 #include <sys/types.h> 14 #include <sys/stat.h> 15 #include <fcntl.h> 16 #include<stdio.h> 17 #include <stdlib.h> 18 #include <unistd.h> 19 #include <string.h> 20 #include<termios.h> 21  22  23 #define len_num 16 24 #define len_mes 128 25  26 struct message_info 27 { 28     char cnu[len_num]; 29     char pnu[len_num]; 30     char message[len_mes]; 31 }; 32  33 void serial_init(int fd) //初始化串口 34 { 35     struct termios options; 36     tcgetattr(fd, &options); 37     options.c_cflag |= (CLOCAL | CREAD); 38     options.c_cflag &= ~CSIZE; 39     options.c_cflag &= ~CRTSCTS; 40     options.c_cflag |= CS8; 41     options.c_cflag &= ~CSTOPB; 42     options.c_iflag |= IGNPAR; 43     options.c_oflag  = 0; 44    options.c_lflag  = 0; 45  46  47     cfsetispeed(&options, B115200); //根据自己的波特率进行相应更改 48     cfsetospeed(&options, B115200); 49     tcsetattr(fd, TCSANOW, &options); 50 } 51  52  53 int send(int fd,char *cmgf,char *cmgs,char *message)  54 { 55     int nread; 56     int nwrite; 57     char buff[len_mes]; 58     char reply[len_mes]; 59  60  61     memset(buff,0,len_mes); 62     strcpy(buff,"at\r"); 63     nwrite=write(fd,buff,strlen(buff)); 64     printf("nwrite=%d,%s\n",nwrite,buff); 65  66  67     memset(reply,0,len_mes); 68     sleep(1); 69     nread=read(fd,reply,sizeof(reply)); 70     printf("nread=%d,%s\n",nread,reply); 71  72  73     memset(buff,0,len_mes); 74     strcpy(buff,"AT+CMGF="); 75     strcat(buff,cmgf); 76     strcat(buff,"\r"); 77     nwrite=write(fd,buff,strlen(buff)); 78     printf("nwrite=%d,%s\n",nwrite,buff); 79  80     memset(reply,0,len_mes); 81     sleep(1); 82     nread=read(fd,reply,sizeof(reply)); 83     printf("nread=%d,%s\n",nread,reply); 84  85     memset(buff,0,len_mes); 86     strcpy(buff,"AT+CMGS="); 87     strcat(buff,cmgs); 88     strcat(buff,"\r"); 89     nwrite=write(fd,buff,strlen(buff)); 90     printf("nwrite=%d,%s\n",nwrite,buff); 91  92     memset(reply,0,len_mes); 93     sleep(1); 94     nread=read(fd,reply,sizeof(reply)); 95     printf("nread=%d,%s\n",nread,reply); 96  97     memset(buff,0,len_mes); 98     strcpy(buff,message); 99     nwrite=write(fd,buff,strlen(buff));100     printf("nwrite=%d,%s\n",nwrite,buff);101 102     memset(reply,0,len_mes);103     sleep(1);104     nread=read(fd,reply,sizeof(reply));105     printf("nread=%d,%s\n",nread,reply);106 107 }108 109 int send_message(int fd,struct message_info info)110 {111     getchar();112     char cmgf[]="1";113     int conter=0;114     char cmgs[16]={'\0'};115 116     printf("Enter you number,please: \n");117     fgets(info.pnu,(len_num-1),stdin);118     while(strlen(info.pnu)!=12)119     {120         if(conter>=3)121         {122             printf("conter out!\n");123             return -1;124         }125         printf("You should enter a 11 digit number! Again: \n");126         fgets(info.pnu,(len_num-1),stdin);127         conter++;128     }129 130     printf("Please enter you want to send a message!\n");131     fgets(info.message,(len_mes),stdin);132     strcat(info.message,"\x1a");133     strcat(cmgs,"\"");134     strcat(cmgs,info.pnu);135 136     cmgs[12] =(char) {'\"'};137 138     send(fd,cmgf,cmgs,info.message);139 140 }141 142 143 int call(int fd,char *atd)144 {145     int nread;146     int nwrite;147     char buff[len_mes];148     char reply[len_mes];149 150     memset(buff,0,len_mes);151     strcpy(buff,"at\r");152     nwrite=write(fd,buff,strlen(buff));153     printf("nwrite=%d,%s\n",nwrite,buff);154 155     memset(reply,0,len_mes);156     sleep(1);157     nread=read(fd,reply,sizeof(reply));158     printf("nread=%d,%s\n",nread,reply);159 160 161     memset(buff,0,len_mes);162     strcpy(buff,"atd");163     strcat(buff,atd);164     strcat(buff,"\r");165     nwrite=write(fd,buff,strlen(buff));166     printf("nwrite=%d,%s\n",nwrite,buff);167 168     memset(reply,0,len_mes);169     sleep(1);170     nread=read(fd,reply,sizeof(reply));171     printf("nread=%d,%s\n",nread,reply);172 173 174 }175 176 int call_phone(int fd,struct message_info info)177 {178     getchar();179     int conter=0;180     char atd[16]={'\0'};181 182     printf("Please enter the number you need to dial: \n");183     fgets(info.pnu,(len_num-1),stdin);184     while(strlen(info.pnu)!=12)185     {186         if(conter>=3)187         {188             printf("conter out!\n");189             return -1;190 191         }192          printf("You should enter a 11 digit number! Again: \n");193           fgets(info.pnu,(len_num-1),stdin);194           conter++;195     }196     strcat(atd,info.pnu);197     atd[11]=(char){';'};198 199     call(fd,atd);200 }201 202 203 204 int main(int argc, char **argv)205 {206     int fd;207     struct message_info info;208     char choice;209 210     fd=open("/dev/ttyS1", O_RDWR|O_NOCTTY|O_NDELAY);211     if(fd<0)212     {213         perror("Can't open the serial port!\n");214     }215 216     serial_init(fd);217     printf("\n------------------------------------\n");218     printf("Welcome to GPRS!\n");219     printf("\n------------------------------------\n");220     printf("Please input you select:\n");221     printf("1.Send a Enlish message.\n ");222     printf("2.Call phone.\n");223     printf("3.Thinking fou using\n");224     choice = getchar();225     switch(choice)226     {227         case '1':send_message(fd,info);228                  break;229         case '2':call_phone(fd,info);230                  break;231         case '3':break;232         default : break;233     }234 235 236 237 238     close(fd);239     return 0;240 }

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