187 lines
4.4 KiB
C
187 lines
4.4 KiB
C
/****************************************************************************
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* boards/arm/cxd56xx/drivers/audio/cxd56_audio_beep.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include "cxd56_audio_config.h"
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#include "cxd56_audio_ac_reg.h"
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#include "cxd56_audio_beep.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Maximum frequency. */
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#define FREQ_MAX 4085
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/* Minimum frequency. */
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#define FREQ_MIN 94
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/* Maximum volume. */
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#define VOL_MAX 0
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/* Minimum volume. */
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#define VOL_MIN -90
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static bool g_beep = false;
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static const uint16_t g_beepfreqtable[] =
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{
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120, 127, 134, 142, 151, 160, 169, 180, 190, 201, 214, 226,
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240, 254, 269, 285, 302, 320, 339, 360, 381, 403, 428, 453,
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480, 509, 539, 571, 606, 642, 681, 719, 762, 810, 857, 910,
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965, 1021, 1079, 1143, 1215, 1289, 1362, 1444, 1536, 1627, 1714, 1829,
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1939, 2043, 2182, 2313, 2400, 2560, 2704, 2866, 3048, 3200, 3429, 3623,
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3840, 4085, 94
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};
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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uint32_t convert_freq(uint32_t freq)
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{
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uint32_t prev;
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uint32_t i;
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for (i = 0; i < sizeof(g_beepfreqtable) / sizeof(uint16_t); i++)
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{
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prev = (i + 62) % 63;
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if (freq < g_beepfreqtable[i])
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{
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if (prev == 62)
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{
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break;
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}
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else if(g_beepfreqtable[prev] <= freq)
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{
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break;
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}
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}
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}
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return prev;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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CXD56_AUDIO_ECODE cxd56_audio_beep_set_freq(uint16_t freq)
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{
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uint32_t conv_freq = 0;
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if (freq > FREQ_MAX)
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{
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return CXD56_AUDIO_ECODE_BEP_FREQ_MAX;
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}
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if (freq < FREQ_MIN)
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{
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return CXD56_AUDIO_ECODE_BEP_FREQ_MIN;
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}
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/* Mute beep. */
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cxd56_audio_ac_reg_disable_beep();
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/* Convert Frequency. */
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conv_freq = convert_freq(freq);
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/* Set beep parameter. */
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cxd56_audio_ac_reg_set_beep_freq(conv_freq);
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if (g_beep)
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{
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cxd56_audio_ac_reg_enable_beep();
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}
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return CXD56_AUDIO_ECODE_OK;
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}
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CXD56_AUDIO_ECODE cxd56_audio_beep_set_vol(int16_t vol)
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{
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uint32_t conv_vol = 0;
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if (vol > VOL_MAX)
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{
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return CXD56_AUDIO_ECODE_BEP_VOL_MAX;
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}
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if (vol < VOL_MIN)
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{
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return CXD56_AUDIO_ECODE_BEP_VOL_MIN;
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}
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/* Mute off. */
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cxd56_audio_ac_reg_disable_beep();
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/* Convert Volume. */
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if (vol != 0)
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{
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conv_vol = -vol / 3;
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}
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else
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{
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conv_vol = 0;
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}
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/* Set beep parameter. */
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cxd56_audio_ac_reg_set_beep_vol(conv_vol);
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if (g_beep)
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{
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cxd56_audio_ac_reg_enable_beep();
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}
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return CXD56_AUDIO_ECODE_OK;
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}
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void cxd56_audio_beep_play(void)
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{
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g_beep = true;
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cxd56_audio_ac_reg_enable_beep();
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}
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void cxd56_audio_beep_stop(void)
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{
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g_beep = false;
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cxd56_audio_ac_reg_disable_beep();
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}
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