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/BusOut.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?

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_BUSOUT_H
MikamiUitOpen 2:dcaee06f6ccb 17 #define MBED_BUSOUT_H
MikamiUitOpen 2:dcaee06f6ccb 18
MikamiUitOpen 2:dcaee06f6ccb 19 #include "DigitalOut.h"
MikamiUitOpen 2:dcaee06f6ccb 20
MikamiUitOpen 2:dcaee06f6ccb 21 namespace mbed {
MikamiUitOpen 2:dcaee06f6ccb 22
MikamiUitOpen 2:dcaee06f6ccb 23 /** A digital output bus, used for setting the state of a collection of pins
MikamiUitOpen 2:dcaee06f6ccb 24 */
MikamiUitOpen 2:dcaee06f6ccb 25 class BusOut {
MikamiUitOpen 2:dcaee06f6ccb 26
MikamiUitOpen 2:dcaee06f6ccb 27 public:
MikamiUitOpen 2:dcaee06f6ccb 28
MikamiUitOpen 2:dcaee06f6ccb 29 /** Create an BusOut, connected to the specified pins
MikamiUitOpen 2:dcaee06f6ccb 30 *
MikamiUitOpen 2:dcaee06f6ccb 31 * @param p<n> DigitalOut pin to connect to bus bit <n> (p5-p30, NC)
MikamiUitOpen 2:dcaee06f6ccb 32 *
MikamiUitOpen 2:dcaee06f6ccb 33 * @note
MikamiUitOpen 2:dcaee06f6ccb 34 * It is only required to specify as many pin variables as is required
MikamiUitOpen 2:dcaee06f6ccb 35 * for the bus; the rest will default to NC (not connected)
MikamiUitOpen 2:dcaee06f6ccb 36 */
MikamiUitOpen 2:dcaee06f6ccb 37 BusOut(PinName p0, PinName p1 = NC, PinName p2 = NC, PinName p3 = NC,
MikamiUitOpen 2:dcaee06f6ccb 38 PinName p4 = NC, PinName p5 = NC, PinName p6 = NC, PinName p7 = NC,
MikamiUitOpen 2:dcaee06f6ccb 39 PinName p8 = NC, PinName p9 = NC, PinName p10 = NC, PinName p11 = NC,
MikamiUitOpen 2:dcaee06f6ccb 40 PinName p12 = NC, PinName p13 = NC, PinName p14 = NC, PinName p15 = NC);
MikamiUitOpen 2:dcaee06f6ccb 41
MikamiUitOpen 2:dcaee06f6ccb 42 BusOut(PinName pins[16]);
MikamiUitOpen 2:dcaee06f6ccb 43
MikamiUitOpen 2:dcaee06f6ccb 44 virtual ~BusOut();
MikamiUitOpen 2:dcaee06f6ccb 45
MikamiUitOpen 2:dcaee06f6ccb 46 /** Write the value to the output bus
MikamiUitOpen 2:dcaee06f6ccb 47 *
MikamiUitOpen 2:dcaee06f6ccb 48 * @param value An integer specifying a bit to write for every corresponding DigitalOut pin
MikamiUitOpen 2:dcaee06f6ccb 49 */
MikamiUitOpen 2:dcaee06f6ccb 50 void write(int value);
MikamiUitOpen 2:dcaee06f6ccb 51
MikamiUitOpen 2:dcaee06f6ccb 52 /** Read the value currently output on the bus
MikamiUitOpen 2:dcaee06f6ccb 53 *
MikamiUitOpen 2:dcaee06f6ccb 54 * @returns
MikamiUitOpen 2:dcaee06f6ccb 55 * An integer with each bit corresponding to associated DigitalOut pin setting
MikamiUitOpen 2:dcaee06f6ccb 56 */
MikamiUitOpen 2:dcaee06f6ccb 57 int read();
MikamiUitOpen 2:dcaee06f6ccb 58
MikamiUitOpen 2:dcaee06f6ccb 59 /** Binary mask of bus pins connected to actual pins (not NC pins)
MikamiUitOpen 2:dcaee06f6ccb 60 * If bus pin is in NC state make corresponding bit will be cleared (set to 0), else bit will be set to 1
MikamiUitOpen 2:dcaee06f6ccb 61 *
MikamiUitOpen 2:dcaee06f6ccb 62 * @returns
MikamiUitOpen 2:dcaee06f6ccb 63 * Binary mask of connected pins
MikamiUitOpen 2:dcaee06f6ccb 64 */
MikamiUitOpen 2:dcaee06f6ccb 65 int mask() {
MikamiUitOpen 2:dcaee06f6ccb 66 return _nc_mask;
MikamiUitOpen 2:dcaee06f6ccb 67 }
MikamiUitOpen 2:dcaee06f6ccb 68
MikamiUitOpen 2:dcaee06f6ccb 69 #ifdef MBED_OPERATORS
MikamiUitOpen 2:dcaee06f6ccb 70 /** A shorthand for write()
MikamiUitOpen 2:dcaee06f6ccb 71 */
MikamiUitOpen 2:dcaee06f6ccb 72 BusOut& operator= (int v);
MikamiUitOpen 2:dcaee06f6ccb 73 BusOut& operator= (BusOut& rhs);
MikamiUitOpen 2:dcaee06f6ccb 74
MikamiUitOpen 2:dcaee06f6ccb 75 /** Access to particular bit in random-iterator fashion
MikamiUitOpen 2:dcaee06f6ccb 76 */
MikamiUitOpen 2:dcaee06f6ccb 77 DigitalOut& operator[] (int index);
MikamiUitOpen 2:dcaee06f6ccb 78
MikamiUitOpen 2:dcaee06f6ccb 79 /** A shorthand for read()
MikamiUitOpen 2:dcaee06f6ccb 80 */
MikamiUitOpen 2:dcaee06f6ccb 81 operator int();
MikamiUitOpen 2:dcaee06f6ccb 82 #endif
MikamiUitOpen 2:dcaee06f6ccb 83
MikamiUitOpen 2:dcaee06f6ccb 84 protected:
MikamiUitOpen 2:dcaee06f6ccb 85 DigitalOut* _pin[16];
MikamiUitOpen 2:dcaee06f6ccb 86
MikamiUitOpen 2:dcaee06f6ccb 87 /** Mask of bus's NC pins
MikamiUitOpen 2:dcaee06f6ccb 88 * If bit[n] is set to 1 - pin is connected
MikamiUitOpen 2:dcaee06f6ccb 89 * if bit[n] is cleared - pin is not connected (NC)
MikamiUitOpen 2:dcaee06f6ccb 90 */
MikamiUitOpen 2:dcaee06f6ccb 91 int _nc_mask;
MikamiUitOpen 2:dcaee06f6ccb 92
MikamiUitOpen 2:dcaee06f6ccb 93 /* disallow copy constructor and assignment operators */
MikamiUitOpen 2:dcaee06f6ccb 94 private:
MikamiUitOpen 2:dcaee06f6ccb 95 BusOut(const BusOut&);
MikamiUitOpen 2:dcaee06f6ccb 96 BusOut & operator = (const BusOut&);
MikamiUitOpen 2:dcaee06f6ccb 97 };
MikamiUitOpen 2:dcaee06f6ccb 98
MikamiUitOpen 2:dcaee06f6ccb 99 } // namespace mbed
MikamiUitOpen 2:dcaee06f6ccb 100
MikamiUitOpen 2:dcaee06f6ccb 101 #endif