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Displaying  Source Code(s)  
 

 
file transfer between two computers using communication ports.

--------------------------------------------------------------------------------

Description : To transfer text and html files between two computers using three wire connections between com ports.a little modification can also transfer image and multimedia files.

#include<stdio.h>
#include<conio.h>
#include<process.h>
#include<dos.h>
#include<graphics.h>
#include<start.h>

void baudset(long);
void comparm(int,int,int);
int port_address;
union REGS i,o;
void main()
{
int gd=DETECT,gm,maxx,maxy,x,y,button,ex=1,c,v=1,run=1;
FILE *f;
char chr;
char *fname;
int result,status,choice,port;
unsigned int fstat,mstat,lstat;
st();
while(1)
{
initgraph(&gd,&gm," ");
cleardevice();
maxx=getmaxx();
maxy=getmaxy();
setbkcolor(9);
if(run==1)
{
gotoxy(32,1);
printf("PORT INACTIVE");
run++;
}
else
{
gotoxy(32,1);
printf("PORT ACTIVATED");
}

choice=0;
rectangle(0,20,maxx,maxy);
setviewport(1,5,maxx-1,maxy-1,1);
if(initmouse()==0)
{
closegraph();
restorecrtmode();
outtextxy(100,100,"mouse driver not loaded");
exit(1);
}
restrictmouseptr(1,20,maxx-1,maxy-1);
showmouseptr();
setcolor(6);
outtextxy(115,30,"PROGRAM TO TRANSFER FILES BETWEEN TWO COMPUTERS");
setcolor(3);
outtextxy(430,45,"ver 1.0 ");
setcolor(14);
outtextxy(170,45,"Sanjoy Saha & Avik Debnath");
setcolor(10);
outtextxy(200,100,"1 : SEND FILE");
outtextxy(200,120,"2 : RECIEVE FILE");
outtextxy(200,140,"3 : EXIT");
outtextxy(200,175,"enter your choice (1,2 or 3)::");
rectangle(195,95,210,110);
rectangle(195,115,210,130);
rectangle(195,135,210,150);
setcolor(13);
outtextxy(20,450,"PRESS 'F1' TO ACTIVATE THE PORTS");
setcolor(9);
while(v==1)
{
if(kbhit())
{
chr=getch();
if(chr==0)
{
chr=getch();
c=(int)chr;
if(c==59)
{
gotoxy(31,1);
printf("PORT ACTIVATED");
v=2;
break;

}
}
}
}
while(ex==1)
{
getmousepos(&button,&x,&y);
gotoxy(5,1);
(button & 1)== 1 ? printf("DOWN"):printf("UP");

gotoxy(20,1);
(button & 2) == 2 ? printf("DOWN"):printf("UP");

gotoxy(65,1);
printf("X=%03d Y=%03d",x,y);
if((button & 1)==1)
{
if((x>=195 && x<=210) && (y>=95 && y<=110))
{
choice=1;
}
if((x>=195 && x<=210) && (y>=115 && y<= 130))
{
choice=2;
}
if((x>=195 && x<=210) && (y>=135 && y<=150))
{
choice=3;
}
}
if(choice==1 || choice==2 || choice==3)
goto sos;
if(kbhit())
{
goto sob;
}
}
fflush(stdin);
sob: gotoxy(60,12);
scanf("%d",&choice);
sos: switch(choice)
{
case 1: {
setcolor(12);
outtextxy(10,205,"select port (1: com1 2: com2) ::");
rectangle(470,200,485,215);
rectangle(510,200,525,215);
outtextxy(474,203,"1");
outtextxy(514,203,"2");
gotoxy(50,14);
scanf("%d",&port);
if(port==1)
port_address=0x3F8;
else
port_address=0x2F8;
baudset((long)2400);
comparm(0,1,8);
outport(port_address+4,1|2);
outtextxy(10,240,"enter the name of file to be sent::");
gotoxy(50,16);
scanf("%15s",&fname);
f=fopen(&fname,"r");
if(f==NULL)
{
setcolor(4);
outtextxy(10,300,"*** file do not exist ***");
setcolor(6);
outtextxy(10,320,"hit any key to continue........");
getch();
break;
}
closegraph();
restorecrtmode();
clrscr();
textcolor(2);
for(;;)
{
if(kbhit())
{
if(getch()==27)
break;
}
lstat=inportb(port_address+5);
if(!(lstat & 32))
continue;
else
{
chr=fgetc(f);
}
if(chr==EOF)
{
cprintf("FILE TRANSMITTED<BR>);
outportb(port_address,EOF);
getch();
break;
}
outportb(port_address,chr);
putchar(chr);
}

fclose(f);
break;
}

case 2: {
setcolor(12);
outtextxy(10,205,"select port (1: com1 2: com2) ::");
gotoxy(50,14);
scanf("%d",&port);
if(port==1)
port_address=0x3F8;
else
port_address=0x2F8;
baudset((long)2400);
comparm(0,1,8);
outportb(port_address+4,1|2);
textcolor(4);
outtextxy(10,240,"save as file name::");
gotoxy(50,16);
scanf("%15s",&fname);

f=fopen(&fname,"w");
if(f==NULL)
{
setcolor(4);
outtextxy(10,300,"*** cannot open file ***");
break;
}
closegraph();
restorecrtmode();
clrscr();
textcolor(4);
cprintf("waiting for i/p<BR>);
textcolor(7);
cprintf("press esc for exit<BR>);
gotoxy(1,4);
for(;;)
{
if(kbhit())
{
if(getch()==27)
break;
}
fstat=inportb(port_address+5);
if(fstat & 2)
cprintf("over run time error<BR>);
if(fstat & 4)
cprintf("parity error");
if(fstat & 8)
cprintf("framing error<BR>);
if(fstat & 16)
cprintf("break recieved<BR>);
if(!(fstat & 1))
continue;
chr=inportb(port_address);
if(chr==EOF)
{
textcolor(2);
cprintf("FILE RECIEVED<BR>);
exit(0);
}
putchar(chr);
fputc(chr,f);
}
outportb(port_address+4,0);
fclose(f);
break;
}

case 3: exit(0);
default: sound(900);
delay(10000);
nosound();
break;
}

}

}


void baudset(long baudrate)
{
unsigned int divisor;
unsigned char lsb,msb;
divisor=1152001/baudrate;
msb=divisor>>8;
lsb=(divisor<<8)>>8;
outportb(port_address+3,128);
outportb(port_address,lsb);
outportb(port_address+1,msb);

}


void comparm(int parity,int stop,int databit)
{
int parmbyte;
parmbyte=databit-5;
if(stop==2)
parmbyte|=4;
if(parity!=0)
parmbyte|=8;
if(parity==2)
parmbyte|=16;
outportb(port_address+3,parmbyte);
}

/* MOUSE WORK */

initmouse()
{
i.x.ax=0;
int86(0x33,&i,&o);
return(o.x.ax);
}


showmouseptr()
{
i.x.ax=1;
int86(0x33,&i,&o);
}


restrictmouseptr(int x1,int y1,int x2,int y2)
{
i.x.ax=7;
i.x.cx=x1;
i.x.dx=x2;
int86(0x33,&i,&o);
i.x.ax=8;
i.x.cx=y1;
i.x.dx=y2;
int86(0x33,&i,&o);
}


getmousepos(int *button,int *x,int *y)
{
i.x.ax=3;
int86(0x33,&i,&o);
*button=o.x.bx;
*x=o.x.cx;
*y=o.x.dx;
}

 

 

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