1 /***************************************************************************
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
10 * Copyright (C) 2006 by Barry Wardell
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
17 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
18 * KIND, either express or implied.
20 ****************************************************************************/
26 /* Read 10-bit channel data */
27 unsigned short adc_read(int channel
)
29 unsigned short data
= 0;
31 if ((unsigned)channel
< NUM_ADC_CHANNELS
)
36 if (ascodec_write(AS3514_ADC_0
, (channel
<< 4)) >= 0)
41 if (ascodec_readbytes(AS3514_ADC_0
, 2, buf
) >= 0)
43 data
= (((buf
[0] & 0x3) << 8) | buf
[1]);