#include <iostream>
#include <conio.h>
#include <stdio.h>
#include <time.h>
#include <windows.h>
 
#define VC_EXTRALEAN        // Exclude rarely-used stuff from Windows headers
#include <bios.h>
//#include <afxwin.h>    // serial.cpp : Defines the entry point for the console application.
 
//#include "stdafx.h"
#include <string.h>
#include "serial.h"
 
// Flow control flags
 
#define FC_DTRDSR       0x01
#define FC_RTSCTS       0x02
#define FC_XONXOFF      0x04
 
// ascii definitions
 
#define ASCII_BEL       0x07
#define ASCII_BS        0x08
#define ASCII_LF        0x0A
#define ASCII_CR        0x0D
#define ASCII_XON       0x11
#define ASCII_XOFF      0x13
using namespace std;
    // variables used with the com port
    BOOL            bPortReady;
    DCB                dcb;
    COMMTIMEOUTS    CommTimeouts;
    BOOL            bWriteRC;
    BOOL            bReadRC;
    DWORD            iBytesWritten;
    DWORD            iBytesRead;
 
HANDLE SerialInit(char *ComPortName, int BaudRate) 
{
    HANDLE hComm;
 
    hComm = CreateFile(ComPortName, 
        GENERIC_READ | GENERIC_WRITE,
        0, // exclusive access
        NULL, // no security
        OPEN_EXISTING,
        0, // no overlapped I/O
        NULL); // null template 
 
    bPortReady = SetupComm(hComm, 1, 128); // set buffer sizes
 
 
    bPortReady = GetCommState(hComm, &dcb);
    dcb.BaudRate = BaudRate;
    dcb.ByteSize = 8;
    dcb.Parity = NOPARITY;
    //dcb.Parity = EVENPARITY;
    dcb.StopBits = ONESTOPBIT;
    dcb.fAbortOnError = TRUE;
 
    // set XON/XOFF
    dcb.fOutX = FALSE;                    // XON/XOFF off for transmit
    dcb.fInX    = FALSE;                    // XON/XOFF off for receive
    // set RTSCTS
    dcb.fOutxCtsFlow = TRUE;                    // turn on CTS flow control
    dcb.fRtsControl = RTS_CONTROL_HANDSHAKE;    // 
    // set DSRDTR
    dcb.fOutxDsrFlow = FALSE;                    // turn on DSR flow control
    dcb.fDtrControl = DTR_CONTROL_ENABLE;    // 
    dcb.fDtrControl = DTR_CONTROL_DISABLE;    // 
    dcb.fDtrControl = DTR_CONTROL_HANDSHAKE;    // 
 
    bPortReady = SetCommState(hComm, &dcb);
 
    // Communication timeouts are optional
 
    bPortReady = GetCommTimeouts (hComm, &CommTimeouts);
 
    CommTimeouts.ReadIntervalTimeout = 5;
    CommTimeouts.ReadTotalTimeoutConstant = 5;
    CommTimeouts.ReadTotalTimeoutMultiplier = 1;
    CommTimeouts.WriteTotalTimeoutConstant = 5;
    CommTimeouts.WriteTotalTimeoutMultiplier = 1;
 
    bPortReady = SetCommTimeouts (hComm, &CommTimeouts);
 
    return hComm;
}
 
char SerialGetc(HANDLE *hComm)
{
    char rxchar;
    BOOL    bReadRC;
    static    DWORD    iBytesRead;
 
    bReadRC = ReadFile(*hComm, &rxchar, 1, &iBytesRead, NULL);
 
    return rxchar;
}
 
void SerialPutc(HANDLE *hComm, char txchar)
{
    BOOL    bWriteRC;
    static    DWORD    iBytesWritten;
 
    bWriteRC = WriteFile(*hComm, &txchar, 1, &iBytesWritten,NULL);
 
    return;
}
 
int main()
{
    HANDLE my=SerialInit("com1",9600);
    char letter;
    printf("ranjan\n");
 
    HANDLE *ptr;
    *ptr=my;
    for( ; ; )
    {
 
    SerialPutc(ptr,'a');     
 
    }
    getch();   
 
    return 0;
 
}