41 lines
1.6 KiB
C
41 lines
1.6 KiB
C
|
/***************************************************************************
|
||
|
|
* __________ __ ___.
|
||
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
||
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
||
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
||
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
||
|
|
* \/ \/ \/ \/ \/
|
||
|
|
* $Id$
|
||
|
|
*
|
||
|
|
* Copyright (C) 2008 by Catalin Patulea
|
||
|
|
*
|
||
|
|
* 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 "audio.h"
|
||
|
|
#include "registers.h"
|
||
|
|
|
||
|
|
void audiohw_init(void)
|
||
|
|
{
|
||
|
|
/* Configure McBSP */
|
||
|
|
SPCR10 = 0; /* Receiver reset */
|
||
|
|
SPCR20 = 3 << 4; /* Rate gen disabled, RINT=XSYNCERR, TX disabled for now */
|
||
|
|
PCR0 = 1 << 1; /* Serial port pins, external frame sync, external clock,
|
||
|
|
frame sync FSX is active-high,
|
||
|
|
TX data sampled on falling clock */
|
||
|
|
XCR10 = 0x00a0; /* 1 word per frame, 32 bits per word */
|
||
|
|
XCR20 = 0; /* Single-phase, unexpected frame pulse restarts xfer,
|
||
|
|
0-bit data delay */
|
||
|
|
}
|
||
|
|
|
||
|
|
void audiohw_postinit(void)
|
||
|
|
{
|
||
|
|
/* Trigger first XEVT0 */
|
||
|
|
SPCR20 |= 1;
|
||
|
|
}
|