ttytest.c

s3c2410串口发送接收代码

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "rs232.h"

int main()
{

	int  ret,portno,nWritten,nRead;
	char bufr[256];
        char buft[256];
        char pp[2];
        int  m,n;
        int  npp;            
        int  gps_i,SectionID;
        char NS,EW;
        char lat_degree[3],lat_min[3],lat_sec[5];
        char long_degree[4],long_min[3],long_sec[5];
        char lat_save[11],long_save[12];
        char latitude[11]={'0','0','0','0','0','0','0','0','0','0','\0'};
        char longitude[12]={'0','0','0','0','0','0','0','0','0','0','0','\0'};
	portno=1;
        m=0;
        n=0;
		ret=OpenCom(portno,"/dev/ttyS1",4800);
		if(ret==-1)
		{
			perror("The /dev/ttyS1 open error.");
			exit(1);
		}
        while(1)
        {
		printf("Recieving data!**\n");
		fflush(stdout);

	loop:	npp=ComRd(portno,pp,1,3000);
 //               printf("pp[0]= %c\n",pp[0]);

                if(pp[0]=='$')
                {
	             nRead=ComRd(portno,bufr,64,3000);
                     printf("nRead = %d\n",nRead);

                     for(gps_i=0,SectionID=0;gps_i<65;gps_i++)
	             {
          		  if(bufr[gps_i]==',')
              		  {
                	       SectionID++;
              		  }
           		  else
              		  {
              		       switch(SectionID)
                  	       {
                    		    case 2:
                       		   	  latitude[m]=bufr[gps_i];
                                          m++;
                        		  break;
                    		    case 3:
                       		   	  latitude[m]=bufr[gps_i];
                                          NS=bufr[gps_i];
                        		  break;
                  		    case 4:
                       			  longitude[n]=bufr[gps_i];
                                          n++;
                       			  break;
                    		    case 5:
                       		   	  longitude[n]=bufr[gps_i];
                                          EW=bufr[gps_i];
                        		  break;
                                    case 6:
                                          sprintf(lat_save,"%s",latitude);
                                          sprintf(long_save,"%s",longitude);
                                          m=0;
                                          n=0;
                                          break;
                   		    default:
                       			  break;
                 		}
              		  }
                     }       

		     if(nRead>=0)
		     {
			  printf("*****OK\n");
                          sprintf(lat_degree,"%c%c",
                                  latitude[0],latitude[1]);
                          sprintf(lat_min,"%c%c",
                                  latitude[2],latitude[3]);
                          sprintf(lat_sec,"%c%c%c%c",latitude[5],latitude[6],
                                  latitude[7],latitude[8]);
                          sprintf(latitude,"%s.%s.%d %c",lat_degree,lat_min,
                                  atoi(lat_sec)*60/10000,NS);

                          sprintf(long_degree,"%c%c%c",
                                  longitude[0],longitude[1],longitude[2]);
                          sprintf(long_min,"%c%c",
                                  longitude[3],longitude[4]);
                          sprintf(long_sec,"%c%c%c%c",longitude[6],longitude[7],
                                  longitude[8],longitude[9]);
                          sprintf(longitude,"%s.%s.%d %c",long_degree,long_min,
                                  atoi(long_sec)*60/10000,EW);
                          printf("Lat_save = %s\n",lat_save);
                          printf("Long_save = %s\n",long_save);
                          printf("Lat = %s\n",latitude);
                          printf("Lot = %s\n",longitude);
                          m = 0;
                          n = 0;
		     }
		     else
			  printf("Timeout\n");
                }
                else
                {
                    goto loop;
                }
               
          }
		if((ret=CloseCom(portno)==-1))
		{
			perror("Close com");
			exit(1);
		}

		printf("\n\n");
	
	printf("Exit now.\n");
	return;
}