#include<dos.h>
#include<stdio.h>
#include<conio.h>
#include<string.h>
#include<stdlib.h>
#define com 1
void initcom(void)
{
union REGS inregs,outregs;
inregs.h.ah=0;
inregs.h.al=0x43;
inregs.x.dx=com -1;
int86(0x14,&inregs,&outregs);
delay(200);
}
void send(char data)
{
union REGS inregs,outregs;
inregs.h.ah=1;
inregs.h.al=data;
inregs.x.dx=com -1;
int86(0x14,&inregs,&outregs);
delay(200);
}
char recive(void)
{
union REGS inregs,outregs;
while (1) {
inregs.h.ah=2;
inregs.x.dx=com -1;
int86(0x14,&inregs,&outregs);
if (outregs.h.ah==0)
return(outregs.h.al);
}
}
void main(void)
{
unsigned char status;
char address ;
int index;
clrscr();
initcom();
send('R');
send('S');
status=recive();
printf("status :%X \n",status);
if (status==0)
printf("Transmiter Ready\n");
else {
printf("Transmiter NOT Ready\n");
exit(1);
}
printf("Enter Number");
scanf("%s",address);
send('T');
for (index=0;index<strlen(address);++index)
send(address);
send(';');
do {
send('S');
send(0xd);
status=recive();
if ((status & 0x80)>0)
printf("getting data\n");
if ((status & 0x40)>0)
printf("sending data\n");
if ((status & 0x20)>0) {
printf("success\n");
exit(1);
}
}
while ((status !=1) && (status !=0));
if (status==1) printf("unit on\n");
if (status==0) printf("unit off\n");
}