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/TimerEvent.h

Committer:
MikamiUitOpen
Date:
2017-04-10
Revision:
11:399670d24ed9
Parent:
2:dcaee06f6ccb

File content as of revision 11:399670d24ed9:

/* mbed Microcontroller Library
 * Copyright (c) 2006-2013 ARM Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#ifndef MBED_TIMEREVENT_H
#define MBED_TIMEREVENT_H

#include "ticker_api.h"
#include "us_ticker_api.h"

namespace mbed {

/** Base abstraction for timer interrupts
*/
class TimerEvent {
public:
    TimerEvent();
    TimerEvent(const ticker_data_t *data);

    /** The handler registered with the underlying timer interrupt
     */
    static void irq(uint32_t id);

    /** Destruction removes it...
     */
    virtual ~TimerEvent();

protected:
    // The handler called to service the timer event of the derived class
    virtual void handler() = 0;

    // insert in to linked list
    void insert(timestamp_t timestamp);

    // remove from linked list, if in it
    void remove();

    ticker_event_t event;

    const ticker_data_t *_ticker_data;
};

} // namespace mbed

#endif