RECEIVER PROGRAM FOR RS-232

#include<stdio.h>
#include<conio.h>
#include<bios.h>
#define SETTINGS (_COM_9600 | _COM_CHR8 | _COM_NOPARITY |_COM_STOP1)
/* baud rate = 9600, 8 data bits, no parity bit, 1 stop bit */
void main(void)
{
unsigned in,out,status;
int port;
clrscr();
printf(“Select Port(Enter ‘0’ for COM1 and ‘1’ for COM2):”);
scanf(“%d”,&port);
printf(“Press ESC to exit”);
textcolor(GREEN);
cprintf(“\n\rData Received:\n”);
_bios_serialcom(_COM_INIT,port,SETTINGS);
for(;;)
{
status=_bios_serialcom(_COM_STATUS,port,0);
if (status & 512)
printf(“\n\t\a Overrun Error”);
if (status & 1024)
printf(“\n\t\a Parity Error”);
if (status & 2048)
printf(“\n\t\a Framing Error”);
if(status & (512|1024|2048)) /* if any error */
break;
if(status & 256) /* if data ready */
{
if((out=_bios_serialcom(_COM_RECEIVE,port,0) & 255)!=0)
putch(out);
}
if(kbhit()) /* if a keystroke is currently available */
{
in=getch(); /* get a character without echoing onto the screen */
if(in==27) /* if ESC */
break;
_bios_serialcom(_COM_SEND,port,in);
}
}
}