#include<stdio.h>
#include<unistd.h>
#include<fcntl.h>
#include<termios.h>
#include<string.h>
#include<errno.h>
#include<sys/types.h>
#include<sys/select.h>
#include<string.h>
#include<sys/time.h>
void *thread_function(void *arg);
char quit='\0';/* this tends to terminate the read thread*/
int open_port(void)
{
int fd;
fd=open("dev/ttyS1",O_RDWR | O_NOCTTY | O_NDELAY);
if(fd==-1)
{
fprintf(stderr,"open_port : unable to open /dev/ttyS1 -%s\n",strerror(errno));
}
return(fd);
}
int init_modem(int fd) /* I - Serial port file */
{
char buffer[255]; /* Input buffer */
int nbytes; /* Number of bytes read */
int tries; /* Number of tries so far */
for (tries = 0; tries < 3; tries ++)
{
/* send an AT command followed by a CR */
if (write(fd, "AT\r", 3) < 3)
continue;
sleep(1);
nbytes=read(fd,&buffer,sizeof(buffer)-1);
if(nbytes<=0)
return 0;
else
{
buffer[nbytes]='\0';
printf("%s\n",buffer);
}
write(fd,"AT+CREG?\r",9);
nbytes=0;
sleep(1);
nbytes=read(fd,&buffer,sizeof(buffer)-1);
buffer[nbytes]='\0';
printf("%s\n",buffer);
return 1;
}
return 0;
}
int main()
{
int mainfd=0;
int res,iout;
struct termios options;
pthread_t a_thread;
void *thread_result;
char msg[256];
mainfd=open_port();
fcntl(mainfd,F_SETFL,FNDELAY);
tcgetattr(mainfd,&options);
cfsetispeed(&options,B9600);
cfsetospeed(&options,B9600);
/*modem setting */
options.c_cflag |=(CLOCAL | CREAD);
options.c_oflag &= ~OPOST;
options.c_cflag &= ~PARENB;
options.c_cflag &= ~CSTOPB;
options.c_cflag |= ~CSIZE;
options.c_cflag |= CS8;
options.c_cflag &= ~CRTSCTS;
options.c_lflag &=~(ICANON | ECHO | ISIG);
tcsetattr(mainfd,TCSANOW,&options);
if(init_modem(mainfd)==0)
{
printf("modem bad, run again\n");
exit(0);
}
printf("every thing working continue\n");
res=pthread_create(&a_thread,NULL,thread_function,(void*)mainfd);
if(res!=0)
{
perror("thread creation failed\n");
exit(EXIT_FAILURE);
}
printf("enter commands or message and type q to exit\n");
while(1)
{
fflush(stdin);
printf("#");
gets(msg);
if(strcmp(msg,"q")==0 || strcmp(msg,"Q")==0)
{
quit='q';
break;
}
iout= write(mainfd,&msg,strlen(msg));
if (iout < 0)
{
printf("write error %d %s\n", errno, strerror(errno));
}
else
{
printf("wrote %d chars:", iout);
}
sleep(4);/*time for processing*/
}
res=pthread_join(a_thread,&thread_result);
if(res!=0)
{
perror("thread join failed\n");
exit(EXIT_FAILURE);
}
printf("thread joined it returned%s\n",(char*)thread_result);
printf("application ended\n");
}
void *thread_function(void *arg)
{
int fd;
char buffer2[256];
int n,in;
int max_fd;
fd_set input;
struct timeval timeout;
/*initilize the input set*/
fd=*((int*)arg);
FD_ZERO(&input);
FD_SET(fd,&input);
max_fd=fd+1;
timeout.tv_sec=3;
timeout.tv_usec=0;
/*looping with select*/
while(1)
{
n=select(max_fd,&input,NULL,NULL,&timeout);/*this wait for 3 sec for any input in the input bufferand then it just go down to check for status of quit and then again comes back*/
if(n<0)
perror("select failed");
else if(n==0)
{}
else
{
/*we have input*/
if(FD_ISSET(fd,&input))
{
/*we have something in the input buffer waiting to be read*/
in=read(fd,&buffer2,255)
if(in<0)
{
printf("read error %d %s\n", errno, strerror(errno));
}
else
{
buffer2[in] = '\0';
printf("%s\n",buffer2);
}
}
}
if(quit=='q')
break;
}
pthread_exit("reading thread also exiting\n");
}
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The UNIX and Linux Forums
---------- Post updated at 01:26 PM ---------- Previous update was at 01:26 PM ----------
What is the question?
It's obvious you are not a "real c programmer" and your attempt to goad us into sifting through this putrid mess is a poor one.
Get a book on C (K&R 2ed is good, Deitel & Deitel How to Program C is also good).
Learn it.
Scour the web for tutorials and examples for doing GSM SMS commands (that's what I did).
Come back less arrogant and with better questions.