scan.c

是一套AT 命令

#include "set_opt.h"
#include <string.h>
#include <unistd.h>
#include <stdio.h>
#define  MAXSIZES 1024
 int main(void) {
  int fd;
  int nread,i;
  char buff[MAXSIZES];
  
  if((fd=open("/dev/ttyS0",O_RDWR|O_NOCTTY|O_NDELAY))<0){
     perror("open error");
     exit(1);
   }
   
  if(fcntl(fd,F_SETFL,0)<0) {
      perror("fcntl error");
      exit(1);
  }
  
  printf("Open ok\n");

  if((i=set_opt(fd,9600,8,'n',1))<0) {
        perror("set_opt error");
        exit(1);
   }

   nread=read(fd,buff,MAXSIZES);
   buff[nread+1]='\0';
   printf("%s",buff);
   close(fd);
   return 0;
}