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9a25a6fe19
/firmware is in the #include path with makes #include "asm/beep.c" sufficient. Add a comment to generic beep code and make another express intent better. Change-Id: I587cd704478b894785927bdfe2e647e28614df62
52 lines
1.6 KiB
C
52 lines
1.6 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) 2011 Michael Sevakis
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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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#if defined(CPU_ARM)
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#include "arm/beep.c"
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#elif defined (CPU_COLDFIRE)
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#include "m68k/beep.c"
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#else /* Generic */
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/* Actually output samples into beep_buf */
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static FORCE_INLINE void beep_generate(int16_t *out, int count,
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uint32_t *phase, uint32_t step,
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int16_t amplitude)
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{
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uint32_t ph = *phase;
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do
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{
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int16_t amp = amplitude;
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if (ph > UINT32_MAX / 2)
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amp = -amp;
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*out++ = amp;
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*out++ = amp;
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ph += step;
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}
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while (--count > 0);
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*phase = ph;
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}
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#define BEEP_GENERIC
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#endif /* CPU_* */
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