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/SPISlave.cpp@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 #include "SPISlave.h"
MikamiUitOpen 2:dcaee06f6ccb 17
MikamiUitOpen 2:dcaee06f6ccb 18 #if DEVICE_SPISLAVE
MikamiUitOpen 2:dcaee06f6ccb 19
MikamiUitOpen 2:dcaee06f6ccb 20 namespace mbed {
MikamiUitOpen 2:dcaee06f6ccb 21
MikamiUitOpen 2:dcaee06f6ccb 22 SPISlave::SPISlave(PinName mosi, PinName miso, PinName sclk, PinName ssel) :
MikamiUitOpen 2:dcaee06f6ccb 23 _spi(),
MikamiUitOpen 2:dcaee06f6ccb 24 _bits(8),
MikamiUitOpen 2:dcaee06f6ccb 25 _mode(0),
MikamiUitOpen 2:dcaee06f6ccb 26 _hz(1000000)
MikamiUitOpen 2:dcaee06f6ccb 27 {
MikamiUitOpen 2:dcaee06f6ccb 28 spi_init(&_spi, mosi, miso, sclk, ssel);
MikamiUitOpen 2:dcaee06f6ccb 29 spi_format(&_spi, _bits, _mode, 1);
MikamiUitOpen 2:dcaee06f6ccb 30 spi_frequency(&_spi, _hz);
MikamiUitOpen 2:dcaee06f6ccb 31 }
MikamiUitOpen 2:dcaee06f6ccb 32
MikamiUitOpen 2:dcaee06f6ccb 33 void SPISlave::format(int bits, int mode) {
MikamiUitOpen 2:dcaee06f6ccb 34 _bits = bits;
MikamiUitOpen 2:dcaee06f6ccb 35 _mode = mode;
MikamiUitOpen 2:dcaee06f6ccb 36 spi_format(&_spi, _bits, _mode, 1);
MikamiUitOpen 2:dcaee06f6ccb 37 }
MikamiUitOpen 2:dcaee06f6ccb 38
MikamiUitOpen 2:dcaee06f6ccb 39 void SPISlave::frequency(int hz) {
MikamiUitOpen 2:dcaee06f6ccb 40 _hz = hz;
MikamiUitOpen 2:dcaee06f6ccb 41 spi_frequency(&_spi, _hz);
MikamiUitOpen 2:dcaee06f6ccb 42 }
MikamiUitOpen 2:dcaee06f6ccb 43
MikamiUitOpen 2:dcaee06f6ccb 44 int SPISlave::receive(void) {
MikamiUitOpen 2:dcaee06f6ccb 45 return(spi_slave_receive(&_spi));
MikamiUitOpen 2:dcaee06f6ccb 46 }
MikamiUitOpen 2:dcaee06f6ccb 47
MikamiUitOpen 2:dcaee06f6ccb 48 int SPISlave::read(void) {
MikamiUitOpen 2:dcaee06f6ccb 49 return(spi_slave_read(&_spi));
MikamiUitOpen 2:dcaee06f6ccb 50 }
MikamiUitOpen 2:dcaee06f6ccb 51
MikamiUitOpen 2:dcaee06f6ccb 52 void SPISlave::reply(int value) {
MikamiUitOpen 2:dcaee06f6ccb 53 spi_slave_write(&_spi, value);
MikamiUitOpen 2:dcaee06f6ccb 54 }
MikamiUitOpen 2:dcaee06f6ccb 55
MikamiUitOpen 2:dcaee06f6ccb 56 } // namespace mbed
MikamiUitOpen 2:dcaee06f6ccb 57
MikamiUitOpen 2:dcaee06f6ccb 58 #endif