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/wait_api.h@2:dcaee06f6ccb, 2016-10-02 (annotated)
- Committer:
- MikamiUitOpen
- Date:
- Sun Oct 02 10:40:44 2016 +0000
- Revision:
- 2:dcaee06f6ccb
3
Who changed what in which revision?
User | Revision | Line number | New 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_WAIT_API_H |
MikamiUitOpen | 2:dcaee06f6ccb | 17 | #define MBED_WAIT_API_H |
MikamiUitOpen | 2:dcaee06f6ccb | 18 | |
MikamiUitOpen | 2:dcaee06f6ccb | 19 | #ifdef __cplusplus |
MikamiUitOpen | 2:dcaee06f6ccb | 20 | extern "C" { |
MikamiUitOpen | 2:dcaee06f6ccb | 21 | #endif |
MikamiUitOpen | 2:dcaee06f6ccb | 22 | |
MikamiUitOpen | 2:dcaee06f6ccb | 23 | /** Generic wait functions. |
MikamiUitOpen | 2:dcaee06f6ccb | 24 | * |
MikamiUitOpen | 2:dcaee06f6ccb | 25 | * These provide simple NOP type wait capabilities. |
MikamiUitOpen | 2:dcaee06f6ccb | 26 | * |
MikamiUitOpen | 2:dcaee06f6ccb | 27 | * Example: |
MikamiUitOpen | 2:dcaee06f6ccb | 28 | * @code |
MikamiUitOpen | 2:dcaee06f6ccb | 29 | * #include "mbed.h" |
MikamiUitOpen | 2:dcaee06f6ccb | 30 | * |
MikamiUitOpen | 2:dcaee06f6ccb | 31 | * DigitalOut heartbeat(LED1); |
MikamiUitOpen | 2:dcaee06f6ccb | 32 | * |
MikamiUitOpen | 2:dcaee06f6ccb | 33 | * int main() { |
MikamiUitOpen | 2:dcaee06f6ccb | 34 | * while (1) { |
MikamiUitOpen | 2:dcaee06f6ccb | 35 | * heartbeat = 1; |
MikamiUitOpen | 2:dcaee06f6ccb | 36 | * wait(0.5); |
MikamiUitOpen | 2:dcaee06f6ccb | 37 | * heartbeat = 0; |
MikamiUitOpen | 2:dcaee06f6ccb | 38 | * wait(0.5); |
MikamiUitOpen | 2:dcaee06f6ccb | 39 | * } |
MikamiUitOpen | 2:dcaee06f6ccb | 40 | * } |
MikamiUitOpen | 2:dcaee06f6ccb | 41 | */ |
MikamiUitOpen | 2:dcaee06f6ccb | 42 | |
MikamiUitOpen | 2:dcaee06f6ccb | 43 | /** Waits for a number of seconds, with microsecond resolution (within |
MikamiUitOpen | 2:dcaee06f6ccb | 44 | * the accuracy of single precision floating point). |
MikamiUitOpen | 2:dcaee06f6ccb | 45 | * |
MikamiUitOpen | 2:dcaee06f6ccb | 46 | * @param s number of seconds to wait |
MikamiUitOpen | 2:dcaee06f6ccb | 47 | */ |
MikamiUitOpen | 2:dcaee06f6ccb | 48 | void wait(float s); |
MikamiUitOpen | 2:dcaee06f6ccb | 49 | |
MikamiUitOpen | 2:dcaee06f6ccb | 50 | /** Waits a number of milliseconds. |
MikamiUitOpen | 2:dcaee06f6ccb | 51 | * |
MikamiUitOpen | 2:dcaee06f6ccb | 52 | * @param ms the whole number of milliseconds to wait |
MikamiUitOpen | 2:dcaee06f6ccb | 53 | */ |
MikamiUitOpen | 2:dcaee06f6ccb | 54 | void wait_ms(int ms); |
MikamiUitOpen | 2:dcaee06f6ccb | 55 | |
MikamiUitOpen | 2:dcaee06f6ccb | 56 | /** Waits a number of microseconds. |
MikamiUitOpen | 2:dcaee06f6ccb | 57 | * |
MikamiUitOpen | 2:dcaee06f6ccb | 58 | * @param us the whole number of microseconds to wait |
MikamiUitOpen | 2:dcaee06f6ccb | 59 | */ |
MikamiUitOpen | 2:dcaee06f6ccb | 60 | void wait_us(int us); |
MikamiUitOpen | 2:dcaee06f6ccb | 61 | |
MikamiUitOpen | 2:dcaee06f6ccb | 62 | #ifdef __cplusplus |
MikamiUitOpen | 2:dcaee06f6ccb | 63 | } |
MikamiUitOpen | 2:dcaee06f6ccb | 64 | #endif |
MikamiUitOpen | 2:dcaee06f6ccb | 65 | |
MikamiUitOpen | 2:dcaee06f6ccb | 66 | #endif |