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/* ----------------------------------------------------------------------------
* ATMEL Microcontroller Software Support
* ----------------------------------------------------------------------------
* Copyright (c) 2011, Atmel Corporation
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the disclaimer below.
*
* Atmel's name may not be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* ----------------------------------------------------------------------------
*/
/**
* \file
*
* Implementation WM8731 driver.
*
*/
/*----------------------------------------------------------------------------
* Headers
*----------------------------------------------------------------------------*/
#include "board.h"
/*----------------------------------------------------------------------------
* Exported functions
*----------------------------------------------------------------------------*/
/**
* \brief Read data from WM8731 Register.
*
* \param pTwid Pointer to twi driver structure
* \param dwDevice Twi slave address.
* \param dwRegAddr Register address to read.
* \return value in the given register.
*/
uint16_t WM8731_Read( Twid *pTwid, uint32_t dwDevice, uint32_t dwRegAddr )
{
uint16_t uwBitsDataRegister;
uint8_t pTdata[2]={0,0};
pTwid->address = dwDevice;
pTwid->iaddress = dwRegAddr;
pTwid->isize = 0;
TWID_Read(pTwid, pTdata, 2, 0);
uwBitsDataRegister = (pTdata[0] << 8) | pTdata[1];
return uwBitsDataRegister;
}
/**
* \brief Write data to WM8731 Register.
*
* \param pTwid Pointer to twi driver structure
* \param dwDevice Twi slave address.
* \param dwRegAddr Register address to read.
* \param uwData Data to write
*/
void WM8731_Write( Twid *pTwid, uint32_t dwDevice, uint32_t dwRegAddr, uint16_t uwData )
{
uint8_t pTmpData[2];
uint16_t uwTmp;
uwTmp = ((dwRegAddr & 0x7f) << 9) | (uwData & 0x1ff);
pTwid->address = dwDevice;
pTwid->iaddress = dwRegAddr;
pTwid->isize = 0;
pTmpData[0] = (uwTmp & 0xff00) >> 8;
pTmpData[1] = uwTmp & 0xff;
TWID_Write(pTwid, pTmpData, 2, 0);
}
/**
* \brief Init WM8731 to DAC mode.
*
* \param pTwid Pointer to twi driver structure
* \param dwDevice Twi slave address.
* \return 0.
*/
uint8_t WM8731_DAC_Init( Twid *pTwid, uint32_t dwDevice )
{
/* reset */
WM8731_Write(pTwid, dwDevice, WM8731_REG_RESET, 0);
/* analogue audio path control */
WM8731_Write(pTwid, dwDevice, WM8731_REG_ANALOGUE_PATH_CTRL, 0x14);
/* digital audio path control*/
WM8731_Write(pTwid, dwDevice, WM8731_REG_DIGITAL_PATH_CTRL, 0x00);
/* power down control */
WM8731_Write(pTwid, dwDevice, WM8731_REG_PWDOWN_CTRL, 0x60);
/* Active control*/
WM8731_Write(pTwid, dwDevice, WM8731_REG_ACTIVE_CTRL, 0x01);
return 0;
}
/**
* \brief Set WM8731 volume
*
* \param pTwid Pointer to twi driver structure
* \param dwDevice Twi slave address.
* \param uwValue Register value, valid value is between 0x30 to 0x7f
* \return 0.
*/
uint8_t WM8731_VolumeSet( Twid *pTwid, uint32_t dwDevice, uint16_t uwValue )
{
uint16_t uwRegValue;
uwValue &= WM8731_LHPVOL_BITS;
uwRegValue = WM8731_LRHPBOTH_BIT | WM8731_LZCEN_BIT | uwValue;
WM8731_Write(pTwid, dwDevice, WM8731_REG_LEFT_HPOUT, uwRegValue);
uwRegValue = WM8731_RZCEN_BIT | WM8731_RLHPBOTH_BIT | uwValue;
WM8731_Write(pTwid, dwDevice, WM8731_REG_RIGHT_HPOUT, uwValue);
return 0;
}
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