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/Ticker.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_TICKER_H
MikamiUitOpen 2:dcaee06f6ccb 17 #define MBED_TICKER_H
MikamiUitOpen 2:dcaee06f6ccb 18
MikamiUitOpen 2:dcaee06f6ccb 19 #include "TimerEvent.h"
MikamiUitOpen 2:dcaee06f6ccb 20 #include "FunctionPointer.h"
MikamiUitOpen 2:dcaee06f6ccb 21
MikamiUitOpen 2:dcaee06f6ccb 22 namespace mbed {
MikamiUitOpen 2:dcaee06f6ccb 23
MikamiUitOpen 2:dcaee06f6ccb 24 /** A Ticker is used to call a function at a recurring interval
MikamiUitOpen 2:dcaee06f6ccb 25 *
MikamiUitOpen 2:dcaee06f6ccb 26 * You can use as many seperate Ticker objects as you require.
MikamiUitOpen 2:dcaee06f6ccb 27 *
MikamiUitOpen 2:dcaee06f6ccb 28 * Example:
MikamiUitOpen 2:dcaee06f6ccb 29 * @code
MikamiUitOpen 2:dcaee06f6ccb 30 * // Toggle the blinking led after 5 seconds
MikamiUitOpen 2:dcaee06f6ccb 31 *
MikamiUitOpen 2:dcaee06f6ccb 32 * #include "mbed.h"
MikamiUitOpen 2:dcaee06f6ccb 33 *
MikamiUitOpen 2:dcaee06f6ccb 34 * Ticker timer;
MikamiUitOpen 2:dcaee06f6ccb 35 * DigitalOut led1(LED1);
MikamiUitOpen 2:dcaee06f6ccb 36 * DigitalOut led2(LED2);
MikamiUitOpen 2:dcaee06f6ccb 37 *
MikamiUitOpen 2:dcaee06f6ccb 38 * int flip = 0;
MikamiUitOpen 2:dcaee06f6ccb 39 *
MikamiUitOpen 2:dcaee06f6ccb 40 * void attime() {
MikamiUitOpen 2:dcaee06f6ccb 41 * flip = !flip;
MikamiUitOpen 2:dcaee06f6ccb 42 * }
MikamiUitOpen 2:dcaee06f6ccb 43 *
MikamiUitOpen 2:dcaee06f6ccb 44 * int main() {
MikamiUitOpen 2:dcaee06f6ccb 45 * timer.attach(&attime, 5);
MikamiUitOpen 2:dcaee06f6ccb 46 * while(1) {
MikamiUitOpen 2:dcaee06f6ccb 47 * if(flip == 0) {
MikamiUitOpen 2:dcaee06f6ccb 48 * led1 = !led1;
MikamiUitOpen 2:dcaee06f6ccb 49 * } else {
MikamiUitOpen 2:dcaee06f6ccb 50 * led2 = !led2;
MikamiUitOpen 2:dcaee06f6ccb 51 * }
MikamiUitOpen 2:dcaee06f6ccb 52 * wait(0.2);
MikamiUitOpen 2:dcaee06f6ccb 53 * }
MikamiUitOpen 2:dcaee06f6ccb 54 * }
MikamiUitOpen 2:dcaee06f6ccb 55 * @endcode
MikamiUitOpen 2:dcaee06f6ccb 56 */
MikamiUitOpen 2:dcaee06f6ccb 57 class Ticker : public TimerEvent {
MikamiUitOpen 2:dcaee06f6ccb 58
MikamiUitOpen 2:dcaee06f6ccb 59 public:
MikamiUitOpen 2:dcaee06f6ccb 60 Ticker() : TimerEvent() {
MikamiUitOpen 2:dcaee06f6ccb 61 }
MikamiUitOpen 2:dcaee06f6ccb 62
MikamiUitOpen 2:dcaee06f6ccb 63 Ticker(const ticker_data_t *data) : TimerEvent(data) {
MikamiUitOpen 2:dcaee06f6ccb 64 }
MikamiUitOpen 2:dcaee06f6ccb 65
MikamiUitOpen 2:dcaee06f6ccb 66 /** Attach a function to be called by the Ticker, specifiying the interval in seconds
MikamiUitOpen 2:dcaee06f6ccb 67 *
MikamiUitOpen 2:dcaee06f6ccb 68 * @param fptr pointer to the function to be called
MikamiUitOpen 2:dcaee06f6ccb 69 * @param t the time between calls in seconds
MikamiUitOpen 2:dcaee06f6ccb 70 */
MikamiUitOpen 2:dcaee06f6ccb 71 void attach(void (*fptr)(void), float t) {
MikamiUitOpen 2:dcaee06f6ccb 72 attach_us(fptr, t * 1000000.0f);
MikamiUitOpen 2:dcaee06f6ccb 73 }
MikamiUitOpen 2:dcaee06f6ccb 74
MikamiUitOpen 2:dcaee06f6ccb 75 /** Attach a member function to be called by the Ticker, specifiying the interval in seconds
MikamiUitOpen 2:dcaee06f6ccb 76 *
MikamiUitOpen 2:dcaee06f6ccb 77 * @param tptr pointer to the object to call the member function on
MikamiUitOpen 2:dcaee06f6ccb 78 * @param mptr pointer to the member function to be called
MikamiUitOpen 2:dcaee06f6ccb 79 * @param t the time between calls in seconds
MikamiUitOpen 2:dcaee06f6ccb 80 */
MikamiUitOpen 2:dcaee06f6ccb 81 template<typename T>
MikamiUitOpen 2:dcaee06f6ccb 82 void attach(T* tptr, void (T::*mptr)(void), float t) {
MikamiUitOpen 2:dcaee06f6ccb 83 attach_us(tptr, mptr, t * 1000000.0f);
MikamiUitOpen 2:dcaee06f6ccb 84 }
MikamiUitOpen 2:dcaee06f6ccb 85
MikamiUitOpen 2:dcaee06f6ccb 86 /** Attach a function to be called by the Ticker, specifiying the interval in micro-seconds
MikamiUitOpen 2:dcaee06f6ccb 87 *
MikamiUitOpen 2:dcaee06f6ccb 88 * @param fptr pointer to the function to be called
MikamiUitOpen 2:dcaee06f6ccb 89 * @param t the time between calls in micro-seconds
MikamiUitOpen 2:dcaee06f6ccb 90 */
MikamiUitOpen 2:dcaee06f6ccb 91 void attach_us(void (*fptr)(void), timestamp_t t) {
MikamiUitOpen 2:dcaee06f6ccb 92 _function.attach(fptr);
MikamiUitOpen 2:dcaee06f6ccb 93 setup(t);
MikamiUitOpen 2:dcaee06f6ccb 94 }
MikamiUitOpen 2:dcaee06f6ccb 95
MikamiUitOpen 2:dcaee06f6ccb 96 /** Attach a member function to be called by the Ticker, specifiying the interval in micro-seconds
MikamiUitOpen 2:dcaee06f6ccb 97 *
MikamiUitOpen 2:dcaee06f6ccb 98 * @param tptr pointer to the object to call the member function on
MikamiUitOpen 2:dcaee06f6ccb 99 * @param mptr pointer to the member function to be called
MikamiUitOpen 2:dcaee06f6ccb 100 * @param t the time between calls in micro-seconds
MikamiUitOpen 2:dcaee06f6ccb 101 */
MikamiUitOpen 2:dcaee06f6ccb 102 template<typename T>
MikamiUitOpen 2:dcaee06f6ccb 103 void attach_us(T* tptr, void (T::*mptr)(void), timestamp_t t) {
MikamiUitOpen 2:dcaee06f6ccb 104 _function.attach(tptr, mptr);
MikamiUitOpen 2:dcaee06f6ccb 105 setup(t);
MikamiUitOpen 2:dcaee06f6ccb 106 }
MikamiUitOpen 2:dcaee06f6ccb 107
MikamiUitOpen 2:dcaee06f6ccb 108 virtual ~Ticker() {
MikamiUitOpen 2:dcaee06f6ccb 109 detach();
MikamiUitOpen 2:dcaee06f6ccb 110 }
MikamiUitOpen 2:dcaee06f6ccb 111
MikamiUitOpen 2:dcaee06f6ccb 112 /** Detach the function
MikamiUitOpen 2:dcaee06f6ccb 113 */
MikamiUitOpen 2:dcaee06f6ccb 114 void detach();
MikamiUitOpen 2:dcaee06f6ccb 115
MikamiUitOpen 2:dcaee06f6ccb 116 protected:
MikamiUitOpen 2:dcaee06f6ccb 117 void setup(timestamp_t t);
MikamiUitOpen 2:dcaee06f6ccb 118 virtual void handler();
MikamiUitOpen 2:dcaee06f6ccb 119
MikamiUitOpen 2:dcaee06f6ccb 120 protected:
MikamiUitOpen 2:dcaee06f6ccb 121 timestamp_t _delay; /**< Time delay (in microseconds) for re-setting the multi-shot callback. */
MikamiUitOpen 2:dcaee06f6ccb 122 FunctionPointer _function; /**< Callback. */
MikamiUitOpen 2:dcaee06f6ccb 123 };
MikamiUitOpen 2:dcaee06f6ccb 124
MikamiUitOpen 2:dcaee06f6ccb 125 } // namespace mbed
MikamiUitOpen 2:dcaee06f6ccb 126
MikamiUitOpen 2:dcaee06f6ccb 127 #endif