Thread: how to loop back for this code ?

why the following code cant loop for contineously reading the data and give output??

please help
thank you!!

Code:

#include <windows.h>
#include <iostream>
#include <stdio.h>

using namespace std;

int main()
{
        DCB dcb;
		HANDLE hComm;
        char buff[9];
        DWORD size;

        hComm = CreateFile( 
                "COM1",
                GENERIC_READ | GENERIC_WRITE,
                0,
                0,
                OPEN_EXISTING,
                FILE_ATTRIBUTE_NORMAL,
                0
                );
		dcb.BaudRate = 4800;
		dcb.ByteSize = 8;
		dcb.Parity = NOPARITY;
		dcb.StopBits = ONESTOPBIT;



        if( hComm == INVALID_HANDLE_VALUE ) exit( 1 );
        while(true)
       {
        ReadFile(hComm, buff, 8, &size, NULL);
        cout << buff << endl;
        getchar();
	}    
       return 0;
}

while(true)

This should guarantee an infinite loop since you have no breaks in it.

if( hComm == INVALID_HANDLE_VALUE ) exit( 1 );

Obviously, this fails and exits. Are you sure the file you open exists? "Com" (with no extention) isn't exatcly a normal filename.

He's opening the COM1 serial port...

Originally posted by adrianxw
He's opening the COM1 serial port...

Oh...