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/api/Timeout.h@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) 2006-2013 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 #ifndef MBED_TIMEOUT_H
MikamiUitOpen 2:dcaee06f6ccb 17 #define MBED_TIMEOUT_H
MikamiUitOpen 2:dcaee06f6ccb 18
MikamiUitOpen 2:dcaee06f6ccb 19 #include "Ticker.h"
MikamiUitOpen 2:dcaee06f6ccb 20
MikamiUitOpen 2:dcaee06f6ccb 21 namespace mbed {
MikamiUitOpen 2:dcaee06f6ccb 22
MikamiUitOpen 2:dcaee06f6ccb 23 /** A Timeout is used to call a function at a point in the future
MikamiUitOpen 2:dcaee06f6ccb 24 *
MikamiUitOpen 2:dcaee06f6ccb 25 * You can use as many seperate Timeout objects as you require.
MikamiUitOpen 2:dcaee06f6ccb 26 *
MikamiUitOpen 2:dcaee06f6ccb 27 * Example:
MikamiUitOpen 2:dcaee06f6ccb 28 * @code
MikamiUitOpen 2:dcaee06f6ccb 29 * // Blink until timeout.
MikamiUitOpen 2:dcaee06f6ccb 30 *
MikamiUitOpen 2:dcaee06f6ccb 31 * #include "mbed.h"
MikamiUitOpen 2:dcaee06f6ccb 32 *
MikamiUitOpen 2:dcaee06f6ccb 33 * Timeout timeout;
MikamiUitOpen 2:dcaee06f6ccb 34 * DigitalOut led(LED1);
MikamiUitOpen 2:dcaee06f6ccb 35 *
MikamiUitOpen 2:dcaee06f6ccb 36 * int on = 1;
MikamiUitOpen 2:dcaee06f6ccb 37 *
MikamiUitOpen 2:dcaee06f6ccb 38 * void attimeout() {
MikamiUitOpen 2:dcaee06f6ccb 39 * on = 0;
MikamiUitOpen 2:dcaee06f6ccb 40 * }
MikamiUitOpen 2:dcaee06f6ccb 41 *
MikamiUitOpen 2:dcaee06f6ccb 42 * int main() {
MikamiUitOpen 2:dcaee06f6ccb 43 * timeout.attach(&attimeout, 5);
MikamiUitOpen 2:dcaee06f6ccb 44 * while(on) {
MikamiUitOpen 2:dcaee06f6ccb 45 * led = !led;
MikamiUitOpen 2:dcaee06f6ccb 46 * wait(0.2);
MikamiUitOpen 2:dcaee06f6ccb 47 * }
MikamiUitOpen 2:dcaee06f6ccb 48 * }
MikamiUitOpen 2:dcaee06f6ccb 49 * @endcode
MikamiUitOpen 2:dcaee06f6ccb 50 */
MikamiUitOpen 2:dcaee06f6ccb 51 class Timeout : public Ticker {
MikamiUitOpen 2:dcaee06f6ccb 52
MikamiUitOpen 2:dcaee06f6ccb 53 protected:
MikamiUitOpen 2:dcaee06f6ccb 54 virtual void handler();
MikamiUitOpen 2:dcaee06f6ccb 55 };
MikamiUitOpen 2:dcaee06f6ccb 56
MikamiUitOpen 2:dcaee06f6ccb 57 } // namespace mbed
MikamiUitOpen 2:dcaee06f6ccb 58
MikamiUitOpen 2:dcaee06f6ccb 59 #endif