不韋 呂 / F746_SD_VarableFilter

SD card player with variable cotoff frequency lowpass and highpass IIR filter. SD カードの *.wav ファイルのオーディオ信号を，遮断周波数可変 IIR 低域通過および高域通過フィルタを通して，ボードに搭載されているCODEC で出力する．このプログラムについては，CQ出版社インターフェース誌 2018年8月号で解説している．

Dependencies:   F746_GUI F746_SAI_IO FrequencyResponseDrawer SD_PlayerSkeleton

mbed_src_STM32F7/common/lp_ticker_api.c@11:399670d24ed9, 2017-04-10 (annotated)

Committer:
MikamiUitOpen
Date:
Mon Apr 10 01:44:22 2017 +0000
Revision:
11:399670d24ed9
Parent:
2:dcaee06f6ccb 
12

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 2:dcaee06f6ccb 1 /* mbed Microcontroller Library
MikamiUitOpen 2:dcaee06f6ccb 2 * Copyright (c) 2015 ARM Limited
MikamiUitOpen 2:dcaee06f6ccb 3 *
MikamiUitOpen 2:dcaee06f6ccb 4 * Licensed under the Apache License, Version 2.0 (the "License");
MikamiUitOpen 2:dcaee06f6ccb 5 * you may not use this file except in compliance with the License.
MikamiUitOpen 2:dcaee06f6ccb 6 * You may obtain a copy of the License at
MikamiUitOpen 2:dcaee06f6ccb 7 *
MikamiUitOpen 2:dcaee06f6ccb 8 * http://www.apache.org/licenses/LICENSE-2.0
MikamiUitOpen 2:dcaee06f6ccb 9 *
MikamiUitOpen 2:dcaee06f6ccb 10 * Unless required by applicable law or agreed to in writing, software
MikamiUitOpen 2:dcaee06f6ccb 11 * distributed under the License is distributed on an "AS IS" BASIS,
MikamiUitOpen 2:dcaee06f6ccb 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
MikamiUitOpen 2:dcaee06f6ccb 13 * See the License for the specific language governing permissions and
MikamiUitOpen 2:dcaee06f6ccb 14 * limitations under the License.
MikamiUitOpen 2:dcaee06f6ccb 15 */
MikamiUitOpen 2:dcaee06f6ccb 16 #include "lp_ticker_api.h"
MikamiUitOpen 2:dcaee06f6ccb 17
MikamiUitOpen 2:dcaee06f6ccb 18 #if DEVICE_LOWPOWERTIMER
MikamiUitOpen 2:dcaee06f6ccb 19
MikamiUitOpen 2:dcaee06f6ccb 20 static ticker_event_queue_t events;
MikamiUitOpen 2:dcaee06f6ccb 21
MikamiUitOpen 2:dcaee06f6ccb 22 static const ticker_interface_t lp_interface = {
MikamiUitOpen 2:dcaee06f6ccb 23 .init = lp_ticker_init,
MikamiUitOpen 2:dcaee06f6ccb 24 .read = lp_ticker_read,
MikamiUitOpen 2:dcaee06f6ccb 25 .disable_interrupt = lp_ticker_disable_interrupt,
MikamiUitOpen 2:dcaee06f6ccb 26 .clear_interrupt = lp_ticker_clear_interrupt,
MikamiUitOpen 2:dcaee06f6ccb 27 .set_interrupt = lp_ticker_set_interrupt,
MikamiUitOpen 2:dcaee06f6ccb 28 };
MikamiUitOpen 2:dcaee06f6ccb 29
MikamiUitOpen 2:dcaee06f6ccb 30 static const ticker_data_t lp_data = {
MikamiUitOpen 2:dcaee06f6ccb 31 .interface = &lp_interface,
MikamiUitOpen 2:dcaee06f6ccb 32 .queue = &events,
MikamiUitOpen 2:dcaee06f6ccb 33 };
MikamiUitOpen 2:dcaee06f6ccb 34
MikamiUitOpen 2:dcaee06f6ccb 35 const ticker_data_t* get_lp_ticker_data(void)
MikamiUitOpen 2:dcaee06f6ccb 36 {
MikamiUitOpen 2:dcaee06f6ccb 37 return &lp_data;
MikamiUitOpen 2:dcaee06f6ccb 38 }
MikamiUitOpen 2:dcaee06f6ccb 39
MikamiUitOpen 2:dcaee06f6ccb 40 void lp_ticker_irq_handler(void)
MikamiUitOpen 2:dcaee06f6ccb 41 {
MikamiUitOpen 2:dcaee06f6ccb 42 ticker_irq_handler(&lp_data);
MikamiUitOpen 2:dcaee06f6ccb 43 }
MikamiUitOpen 2:dcaee06f6ccb 44
MikamiUitOpen 2:dcaee06f6ccb 45 #endif