July 25, 2008 02:34pm pdt

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02.23.2008 at 11:42PM PST, ID: 23188148

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7.6

File Transfer using RS232 serial cable

Zone: C Programming Language

Tags: C

I have a program in C language for transferring files from one computer to another using RS232 serial cable, but i don't have an idea on how it works and what concept is behind it, can i be explained or atleast provide me a good location where i can be understood,

         
           
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             #include <stdio.h>
#include <dos.h>
#include<string.h>
#include<conio.h>
#define PORT1 0x3f8
 
void main()
{
   int c,ch,choice,i;
   char filename[15],filename2[15],buf;
   FILE *in,*out;
   clrscr();
   outportb(PORT1+0,0x03);
   outportb(PORT1+1,0);
   outportb(PORT1+3,0x03);
   outportb(PORT1+2,0xc7);
   outportb(PORT1+4,0x0b);
   printf("\this computer is going to act as a:");
   printf("\n 1.sender \n2.receiver\n\nEnter the choice:");
   scanf("%d",&choice);
   if(choice==1)
   {
      printf("enter the filename to be created:");
      scanf("%s",filename);
      for(i=0;i<=strlen(filename);i++)
	 outportb(PORT1,filename[i]);
      in=fopen(filename,"rt");
      printf("\n\nsending.....\n\n");
      while(!feof(in))
      {
       buf=fgetc(in);
       printf("%c",buf);
       outportb(PORT1,buf);
       delay(10);
      }
  }
  else
  {
   i=0;
   buf='a';
   while(buf!=NULL)
   {
     c=inportb(PORT1+5);
     if(c&1)
     {
     buf=inportb(PORT1);
     filename2[i]=buf;
     i++;
    }
  }
  out=fopen(filename2,"wt");
  printf("\n Filename received:%s",filename[2]);
  printf("Reading from the port...");
  printf("writing to file %s",filename2);
  do
  {
   c=inportb(PORT1+5);
   if(c&1)
   {
     buf=inportb(PORT1);
     printf("%c",buf);
     fputc(buf,out);
     delay(10);
   }
   if(kbhit())
   {
     ch=getch();
   }
  }while(ch!=27);
}
}

           
         

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Question Stats

Zone: Programming

Question Asked By: cool_sathish_333

Solution Provided By: josgood

Participating Experts: 3

Solution Grade: B

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