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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2006 by Barry Wardell
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "adc.h"
#include "i2c-pp.h"
#include "as3514.h"
/* Read 10-bit channel data */
unsigned short adc_read(int channel)
{
unsigned char buf[2];
unsigned short data = 0;
/* Select channel */
pp_i2c_send( AS3514_I2C_ADDR, ADC_0, (channel << 4));
/* Wait for conversion to be complete */
pp_i2c_send( AS3514_I2C_ADDR, IRQ_ENRD2, 0x1);
while( (i2c_readbyte( AS3514_I2C_ADDR, IRQ_ENRD2) & 0x1) == 0);
/* Read data */
i2c_readbytes( AS3514_I2C_ADDR, ADC_0, 2, buf);
data = (((buf[0] & 0x3) << 8) | buf[1]);
return data;
}
void adc_init(void)
{
/* FIXME: Add initialization of the ADC */
}
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