2670e3f038
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20511 a1c6a512-1295-4272-9138-f99709370657
47 lines
1.7 KiB
C
47 lines
1.7 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2008 by Catalin Patulea
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "audio.h"
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#include "registers.h"
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void audiohw_init(void)
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{
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/* Configure McBSP */
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SPCR10 = 0; /* Receiver reset */
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SPCR20 = 3 << 4; /* Rate gen disabled, RINT=XSYNCERR, TX disabled for now */
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PCR0 = 1 << 1; /* Serial port pins, external frame sync, external clock,
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frame sync FSX is active-high,
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TX data sampled on falling clock */
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XCR10 = 0x00a0; /* 1 word per frame, 32 bits per word */
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XCR20 = 0; /* Single-phase, unexpected frame pulse restarts xfer,
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0-bit data delay */
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}
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void audiohw_start(void)
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{
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/* Trigger first XEVT0 */
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SPCR20 |= 1;
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}
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audiohw_stop(void)
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{
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/* Reset the transmitter */
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SPCR20&=0xFFFE;
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}
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