2.1.4.5 SetCommTimeouts

1 Description
2 Syntax
3 Parameters
4 Return
5 Examples
6 Remark
7 See Also
8 Header to Include
9 Reference

Description

The SetCommTimeouts function sets the time-out parameters for all read and write operations on a specified communications device.

Syntax

BOOL SetCommTimeouts( HANDLE hFile, LPCOMMTIMEOUTS lpCommTimeouts )

Parameters

hFile: Handle to the communications device.
lpCommTimeouts: Pointer to a COMMTIMEOUTS structure that contains the new time-out values.

Return

If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero.

Examples

EX1

#include <Origin.h>
#include <mscomm.h>

BOOL Set_Comm_Timeouts()
{
	file ff;

	//Open comm port
	if (!ff.Open("COM1:",  file::modeReadWrite ))
	{
		ASSERT(FALSE);
		return FALSE;
	}

	UINT hCom = ff.GetHandle();

	if ( hCom == file::hFileNull ) 
	{
		ASSERT(FALSE);
		return FALSE;
	}

	COMMTIMEOUTS tTimeout; 
	tTimeout.ReadIntervalTimeout = MAXWORD; 
	tTimeout.ReadTotalTimeoutMultiplier = 0; 
	tTimeout.ReadTotalTimeoutConstant = 500; // pas de time out = 0 
	tTimeout.WriteTotalTimeoutMultiplier = 0; 
	tTimeout.WriteTotalTimeoutConstant = 0; 

	// config the timeout 
	if( !SetCommTimeouts((HANDLE)hCom,&tTimeout) )
	{
		ASSERT(FALSE);
		return FALSE;
	}

	//...

	if( !ff.Close() ) // Close() function will happen automatically by the file class destructor.
	{
		ASSERT(FALSE);
		return FALSE;
	}
}