30-Apr-2008, 05:09
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New Member
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Join Date: Apr 2008
Posts: 1
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about bioscom(1,in,COM1)
Hi all,
I m doing one c program for serial communication.In that i want to send request to one hardware module, after receiving my request that h/w send me one frame with predefined format.
/*
Program SERIALCOMMUNICATION.C is used for PC to PC or PC to Hardware
Communication.
*/
#include<bios.h>
#include<stdio.h>
#include<string.h>
#include<conio.h>
#include<time.h>
#define COM3 2
#define DATA_READY 0x100
#define SETTINGS ( 0xE0 | 0x03 | 0x00 | 0x00)
//baud 9600 | 8 data bits | no parity | 1 stop bit
void main()
{
int status;
unsigned char out,in;
char another,option;
FILE *rfile,*wfile;
int DONE=0,i=0,p=0,k=0;
int Count=0;
unsigned char rcvdata[80];
char sendrequest[21]="Start,SendRequest,End";
time_t timer;
struct tm *tblock;
timer = time(NULL);
printf("\n");
clrscr();
bioscom(0, SETTINGS, COM3);
printf("\n\n*********************************************************\n\n");
printf("\t1. Send Request For Current Time Frame\n");
printf("\t2. Escape");
printf("\n\n**********************************************************\n\n");
printf("Your Choice If you want,Otherwise wait for next Frame? :\n");
rfile=fopen("RECEIVE.TXT","a");
wfile=fopen("SEND.TXT","a");
while (!DONE)
{
status = bioscom(3, 0, COM3);
if(status & DATA_READY)
{
if((out =(unsigned char)bioscom(2, 0, COM3)) != 0)// input message byte.
{
if((int)out==8 && Count>0)
{
Count=Count-1;
}
else
{
rcvdata[Count]=out; //Store char in buffer
Count++;
}
}
if(out==13)
{
fprintf(rfile,"\n");
for(i=0;i<Count-1;i++)
fprintf(rfile,"%c",rcvdata[i]);
for(p=0;p<Count-1;p++)
printf("%c",rcvdata[p]);
printf("\n");
Count=0;
}
}
if (kbhit()) //character entered
{
option=getche();
switch(option)
{
case '1' :
printf("\nSend Request:");
/* converts date/time to a structure */
tblock = localtime(&timer);
fprintf(wfile,"\nRequest sent at:%s:", asctime(tblock));
for(k=0;k<21;k++)
{
bioscom(1,sendrequest[k],COM3);
printf("%c",sendrequest[k]);
fprintf(wfile,"%c",sendrequest[k]);
}
printf("\n");
fprintf(wfile,"\n");
break;
case '2' :
case 27 :
DONE=1;
break;
default :
printf("\nPress Correct option i.e. either 1 or 2\n");
}
}
}
fclose(rfile);
fclose(wfile);
}
Now after compiling it gives zero errors.
When I execute this program, it receives all things (hardware sent) but send nothing,not a single char.
Please tell me if anything wrong in my code
Thanks in advance
Last edited by LuciWiz : 30-Apr-2008 at 11:53.
Reason: Please insert your C/C++ code between [cpp] & [/cpp] tags
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