安徽工程科技学院毕业设计（论文）
#include
#include
#include
#include // open() close()
#include // read() write()
#include // set baud rate
#include
#include
#include
#include
#define FUNC_RUN 0
#define FUNC_NOT_RUN 1
#define SIMPLE_TEST 1
#define READ_SIM_CARD_ID 2
#define MAKE_A_CALL 3
#define WAIT_A_CALL 4
#define SHORT_MESSAGE 5
#define FUNC_QUIT 6
#define SEND_SHORT_MESSAGE 1
#define READ_SHORT_MESSAGE 2
#define CONFIG_SHORT_MESSAGE_ENV 3
#define QUIT_SHORT_MESSAGE 4
#define DEVICE_TTYS "/dev/ttyS1"
#define MAX_LEN_OF_SHORT_MESSAGE 140
#define RECEIVE_BUF_WAIT_1S 1
#define RECEIVE_BUF_WAIT_2S 2
#define RECEIVE_BUF_WAIT_3S 3
#define RECEIVE_BUF_WAIT_4S 4
#define RECEIVE_BUF_WAIT_5S 5
//-------------------- read datas from GSM/GPRS ----------------//
int read_GSM_GPRS_datas(int fd, char *rcv_buf,int rcv_wait)
{
int retval;
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安徽工程科技学院毕业设计（论文）
fd_set rfds;
struct timeval tv;
int ret,pos;
tv.tv_sec = rcv_wait; // wait 2.5s
tv.tv_usec = 0;
pos = 0; // point to rceeive buf
while (1)
{
FD_ZERO(&rfds);
FD_SET(fd, &rfds);
retval = select(fd+1 , &rfds, NULL, NULL, &tv);
if (retval == -1)
{
perror("select()");
break;
}
else if (retval)
{// pan duan shi fou hai you shu ju
ret = read(fd, rcv_buf+pos, 2048);
pos += ret;
if (rcv_buf[pos-2] == '\r' && rcv_buf[pos-1] == '\n')
{
FD_ZERO(&rfds);
FD_SET(fd, &rfds);
retval = select(fd+1 , &rfds, NULL, NULL, &tv);
if (!retval) break;// no datas, break
}
}
else
{
printf("No data\n");
break;
}
}
return 1;
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安徽工程科技学院毕业设计（论文）
} // end read_GSM_GPRS_datas
//--------------------------send cmd ------------------------//
int send_GSM_GPRS_cmd(int fd, char *send_buf)
{
ssize_t ret;
ret = write(fd,send_buf,strlen(send_buf));
if (ret == -1)
{
printf ("write device %s error\n", DEVICE_TTYS);
return -1;
}
return 1;
} // end send_GSM_GPRS_cmd
//------------------ send cmd and read back result ---------------------//
void GSM_GPRS_send_cmd_read_result(int fd, char *send_buf, int rcv_wait)
{
char rcv_buf[2048];
if((send_buf==NULL) || (send_GSM_GPRS_cmd(fd,send_buf)))
{ // send success , then read
bzero(rcv_buf,sizeof(rcv_buf));
if (read_GSM_GPRS_datas(fd,rcv_buf,rcv_wait))
{
printf ("%s\n",rcv_buf);
}
else
{
printf ("read error\n");
}
}
else
{
printf("write error\n");
}
} // end GSM_GPRS_send_cmd_read_result
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安徽工程科技学院毕业设计（论文）
//-------------- send cmd : "at" to GSM/GPRS MODEM -----------//
void GSM_simple_test(int fd)
{
char *send_buf="at\r";
GSM_GPRS_send_cmd_read_result(fd,send_buf,RECEIVE_BUF_WAIT_1S);
} // end GSM_simple_test
//-------------- send cmd : "at+ccid" to GSM/GPRS MODEM -----------------//
void GSM_read_sim_card_id(int fd)
{
char *send_buf="at+ccid\r";
GSM_GPRS_send_cmd_read_result(fd,send_buf,RECEIVE_BUF_WAIT_1S);
} // end GSM_read_sim_card_id
//--------------- send cmd : "atd;" to GSM/GPRS MODEM ---------//
void GSM_call(int fd)
{
char send_buf[17];
char *send_cmd_ath = "ath\r";
int i;
// input telephone number
bzero(send_buf,sizeof(send_buf));
send_buf[0]='a';
send_buf[1]='t';
send_buf[2]='d';
send_buf[16] = '\0';
printf("please input telephone number:");
i = 3;
while (1)
{
send_buf[i]=getchar();
if (send_buf[i]=='\n') break;
i++;
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安徽工程科技学院毕业设计（论文）
}
send_buf[i]=';';
send_buf[i+1]='\r';
// end input telphone number
// send cmd
GSM_GPRS_send_cmd_read_result(fd,send_buf,RECEIVE_BUF_WAIT_1S);
//quit call
printf("press ENTER for quit:");
getchar();
// send cmd
GSM_GPRS_send_cmd_read_result(fd,send_cmd_ath,RECEIVE_BUF_WAIT_1S);
} // end GSM_call
//----------- wait for GSM/GPRS call signal -------------------//
void GSM_wait_call(int fd)
{
char rcv_buf[2048];
char *send_cmd_ath = "ath\r";
int wait_RING;
wait_RING = 10;
while (wait_RING!=0)
{
bzero(rcv_buf,sizeof(rcv_buf));
if (read_GSM_GPRS_datas(fd,rcv_buf,RECEIVE_BUF_WAIT_1S))
{
printf ("%s\n",rcv_buf);
}
else
{
printf ("read error\n");
}
wait_RING--;
}
GSM_GPRS_send_cmd_read_result(fd,send_cmd_ath,RECEIVE_BUF_WAIT_1S);
printf("quit wait_call\n");
} // end GSM_wait_call
//------------------------ GSM/GPRS send short message -----------------//
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安徽工程科技学院毕业设计（论文）
void GSM_Send_Message(int fd)
{
char cmd_buf[23];
char short_message_buf[MAX_LEN_OF_SHORT_MESSAGE];
int i;
char rcv_buf;
bzero(cmd_buf,sizeof(cmd_buf));
bzero(short_message_buf,sizeof(short_message_buf));
printf ("send short message:\n");
cmd_buf[0]='a';
cmd_buf[1]='t';
cmd_buf[2]='+';
cmd_buf[3]='c';
cmd_buf[4]='m';
cmd_buf[5]='g';
cmd_buf[6]='s';
cmd_buf[7]='=';
cmd_buf[8]='"';
printf ("please input telephone number:");
i = 9;
while (1)
{
cmd_buf[i]=getchar();
if (cmd_buf[i]=='\n') break;
i++;
}
cmd_buf[i]='"';
cmd_buf[i+1]='\r';
cmd_buf[i+2]='\0';
// send cmd : at+cmgs="(telephone number)"
GSM_GPRS_send_cmd_read_result(fd,cmd_buf,RECEIVE_BUF_WAIT_1S);
// input short message
printf("please input short message:");
i = 0;
while(i ");
scanf("%d",&flag_sm_select);
getchar();
switch (flag_sm_select)
{
case SEND_SHORT_MESSAGE :
{ GSM_Send_Message(fd); break; }
case READ_SHORT_MESSAGE :
{ GSM_Read_Message(fd); break; }
case CONFIG_SHORT_MESSAGE_ENV :
{ GSM_Conf_Message(fd); break; }
case QUIT_SHORT_MESSAGE : { flag_sm_run =
FUNC_NOT_RUN; break; }
default :
{
printf("please input your select use 1 to 3\n");
}
}
}
printf ("\n");
} // end GSM_send_mesg
//-------------------- print -----------------------//
void print_prompt(void)
{
printf ("Select what you want to do:\n");
printf ("1 : Simple Test\n");
printf ("2 : Read SIM CARD ID\n");
printf ("3 : Make A Call\n");
printf ("4 : Wait A Call\n");
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安徽工程科技学院毕业设计（论文）
printf ("5 : Short message\n");
printf ("6 : Quit\n");
printf (">");
} // end print_prompt
//----------------- Control GSM/GPRS MODULE --------------//
void func_GSM(int fd)
{
int flag_func_run;
int flag_select_func;
ssize_t ret;
flag_func_run = FUNC_RUN;
while (flag_func_run == FUNC_RUN)
{
print_prompt(); // print select functions
scanf("%d",&flag_select_func); // user input select
getchar();
switch(flag_select_func)
{
case SIMPLE_TEST : {GSM_simple_test(fd);
break;}
case READ_SIM_CARD_ID : {GSM_read_sim_card_id(fd);
break;}
case MAKE_A_CALL : {GSM_call(fd);
break;}
case WAIT_A_CALL : {GSM_wait_call(fd);
break;}
case SHORT_MESSAGE : {GSM_short_mesg(fd);
break;}
case FUNC_QUIT :
{
flag_func_run = FUNC_NOT_RUN;
printf("Quit GSM/GPRS function.byebye\n");
break;
}
default :
{
printf("please input your select use 1 to 7\n");
}
}
}
}// end func_GPRS
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安徽工程科技学院毕业设计（论文）
//-------------------- init seriel port --------------------//
void init_ttyS(int fd)
{
struct termios options;
bzero(&options, sizeof(options)); // clear options
cfsetispeed(&options,B9600); // setup baud rate
cfsetospeed(&options,B9600);
options.c_cflag |= (CRTSCTS | CS8 | CLOCAL | CREAD);
options.c_iflag = IGNPAR;
tcflush(fd, TCIFLUSH);
tcsetattr(fd, TCSANOW, &options);
}//end init_ttyS
//------------------------- main -------------------//
{
int fd;
printf("\nGSM/GPRS SYSTEM\n\n");
// open seriel port
fd = open(DEVICE_TTYS, O_RDWR);
if (fd == -1)
{
printf("open device %s error\n",DEVICE_TTYS);
}
else
{
init_ttyS(fd); // init device
func_GSM(fd); // GSM/GPRS functions
// close ttyS0
if (close(fd)!=0) printf("close device %s error",DEVICE_TTYS);
}
return 0;
}// end main
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