SIMPLEX COMMUNICATION USING RS-232 IN C (FILE PASSING)

         SIMPLEX COMMUNICATION USING RS-232 IN C (FILE PASSING)

SIMPLEX FILE TRANSMITER

#include<stdio.h>

#include<io.h>

#include<dos.h>

#include<conio.h>

#include<bios.h>

#define COM1 0

#define COM1ADDR 0x3F8

#define DATA_READY 0x100

#define TRANS_READY 0x2000

             /*#define SETTING 0xE0|0x08|0x03|0x00;  baud9600 none parity  8data 1stop bit */

   main()

   {

char tfile;

int status,counter=0;/*,v=1;*/

char ch;

long size;

char setting,baud = 0xe0,parity = 0x08,data = 0x04,stop = 0x03;

FILE *fpt;

setting = baud | parity | data | stop;

clrscr();

bioscom(0,setting,COM1);

                     printf("\n\tEnter Filename To Transfer : ");

                   scanf("%s",tfile);

                   fpt = fopen("c:\\1.txt" ,"r");

                   if(fpt == NULL)

                     {

                             printf("\n\tFile Not Found.....\n");

                     }

                    else

                     {

                              fseek(fpt,0,SEEK_END);

                      }

                     size = ftell(fpt);

                      printf("\n\tFile size is %ld",size);

                      rewind(fpt);

                       printf("\n\tFile is being transferred\n\tWait...\n");

                      while(!feof(fpt))

                      {

                             status=bioscom(3,0,COM1);

                             if(status & TRANS_READY)

                             {

                                       ch=fgetc(fpt);

                                        if(ch==EOF)

                                       {

                                                outport

                                                break;

                                        }

                                       outport(COM1ADDR,ch);

                                       counter++;

                                       gotoxy(20,20);

                                       printf("%d Bytes has been transfered",counter);

                             }

                     }      

                     outport(COM1ADDR,0x1b);

                     printf("\n\tFile transferred successfully");

                     getch();

               }

}

                                      SIMPLEX FILE RECEIVER

#include<stdio.h>

#include<dos.h>

#include<conio.h>

#include<bios.h>

#define COM1 0

#define COM1ADDR 0x3f8

#define DATA_READY 0x100

#define TRANS_READY 0x2000

main()

{

            char rfile,ch;

int status;

char setting,baud = 0xa0,parity = 0x08,data = 0x04,stop = 0x03;

FILE *fpr;

setting = baud | parity | data | stop;

clrscr();

             printf("\n\tEnter file to receive: ");

             scanf("%s",rfile);

             fpr = fopen(rfile,"w");

             if(fpr == NULL)

            {

                      printf("\n\tError...File cannot be opened");

             }           

else

            {       

                      bioscom(0,setting,COM1);

            }

            while(1)

            {

                      status=bioscom(3,0,COM1);

                      if(status & DATA_READY)

                      {

                               ch = inport(COM1ADDR);

                               fputc(ch,fpr);

                               if(ch== 0x1b)

                               break;

                               printf("%c",ch);

                      }

            }

}