tea5767.cpp

TEA5767 官方参考程序Sample

/////////////////////////////////////////////////////////////////////////////
// $Id: TEA5767.cpp,v 1.1 2005/01/13 19:44:17 to_see Exp $
/////////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2005 Torsten Seeboth.  All rights reserved.
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA
//
/////////////////////////////////////////////////////////////////////////////
// CVS Log
//
// $Log: TEA5767.cpp,v $
// Revision 1.1  2005/01/13 19:44:17  to_see
// Added TEA5767 autodetection
//
//////////////////////////////////////////////////////////////////////////////

/**
* @file TDA5767.cpp TEA5767 chip related implementations
*/

#include "stdafx.h"
#include "TEA5767.h"
#include "I2C.h"
#include "DebugLog.h"


BOOL IsTEA5767PresentAtC0(IN CI2CBus* i2cBus)
{
	BYTE buffer[5] = { 0xff, 0xff, 0xff, 0xff, 0xff };
	BYTE addr = I2C_TEA5767;

	// Sub addresses are not supported so read all five bytes.
	if (!i2cBus->Read(&addr, sizeof(addr), buffer, sizeof(buffer)))
	{
		LOG(2, "TEA5767: No I2C device at 0xC0."); 
		return FALSE;
	}

	// If all bytes are the same then it's a tuner and not a tea5767 chip.
	if (buffer[0] == buffer[1] &&
		buffer[0] == buffer[2] &&
		buffer[0] == buffer[3] &&
		buffer[0] == buffer[4])
	{
		LOG(2, "TEA5767: Not Found.");
		return FALSE;
	}

	// Status bytes
	// Byte 4: bit 3:1 : CI (Chip Identification) == 0
	//         bit 0   : internally set to 0
	// Byte 5: bit 7:0 : == 0
	if (((buffer[3] & 0x0f) == 0x00) && (buffer[4] == 0x00))
	{
		LOG(1, "TEA5767: Found. 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X",
			buffer[0], buffer[1], buffer[2], buffer[3], buffer[4]);
		return TRUE;
	}

	LOG(1, "TEA5767: Not Found. 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X",
		buffer[0], buffer[1], buffer[2], buffer[3], buffer[4]);
	return FALSE;
}