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/PortOut.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_PORTOUT_H
MikamiUitOpen 2:dcaee06f6ccb 17 #define MBED_PORTOUT_H
MikamiUitOpen 2:dcaee06f6ccb 18
MikamiUitOpen 2:dcaee06f6ccb 19 #include "platform.h"
MikamiUitOpen 2:dcaee06f6ccb 20
MikamiUitOpen 2:dcaee06f6ccb 21 #if DEVICE_PORTOUT
MikamiUitOpen 2:dcaee06f6ccb 22
MikamiUitOpen 2:dcaee06f6ccb 23 #include "port_api.h"
MikamiUitOpen 2:dcaee06f6ccb 24
MikamiUitOpen 2:dcaee06f6ccb 25 namespace mbed {
MikamiUitOpen 2:dcaee06f6ccb 26 /** A multiple pin digital out
MikamiUitOpen 2:dcaee06f6ccb 27 *
MikamiUitOpen 2:dcaee06f6ccb 28 * Example:
MikamiUitOpen 2:dcaee06f6ccb 29 * @code
MikamiUitOpen 2:dcaee06f6ccb 30 * // Toggle all four LEDs
MikamiUitOpen 2:dcaee06f6ccb 31 *
MikamiUitOpen 2:dcaee06f6ccb 32 * #include "mbed.h"
MikamiUitOpen 2:dcaee06f6ccb 33 *
MikamiUitOpen 2:dcaee06f6ccb 34 * // LED1 = P1.18 LED2 = P1.20 LED3 = P1.21 LED4 = P1.23
MikamiUitOpen 2:dcaee06f6ccb 35 * #define LED_MASK 0x00B40000
MikamiUitOpen 2:dcaee06f6ccb 36 *
MikamiUitOpen 2:dcaee06f6ccb 37 * PortOut ledport(Port1, LED_MASK);
MikamiUitOpen 2:dcaee06f6ccb 38 *
MikamiUitOpen 2:dcaee06f6ccb 39 * int main() {
MikamiUitOpen 2:dcaee06f6ccb 40 * while(1) {
MikamiUitOpen 2:dcaee06f6ccb 41 * ledport = LED_MASK;
MikamiUitOpen 2:dcaee06f6ccb 42 * wait(1);
MikamiUitOpen 2:dcaee06f6ccb 43 * ledport = 0;
MikamiUitOpen 2:dcaee06f6ccb 44 * wait(1);
MikamiUitOpen 2:dcaee06f6ccb 45 * }
MikamiUitOpen 2:dcaee06f6ccb 46 * }
MikamiUitOpen 2:dcaee06f6ccb 47 * @endcode
MikamiUitOpen 2:dcaee06f6ccb 48 */
MikamiUitOpen 2:dcaee06f6ccb 49 class PortOut {
MikamiUitOpen 2:dcaee06f6ccb 50 public:
MikamiUitOpen 2:dcaee06f6ccb 51
MikamiUitOpen 2:dcaee06f6ccb 52 /** Create an PortOut, connected to the specified port
MikamiUitOpen 2:dcaee06f6ccb 53 *
MikamiUitOpen 2:dcaee06f6ccb 54 * @param port Port to connect to (Port0-Port5)
MikamiUitOpen 2:dcaee06f6ccb 55 * @param mask A bitmask to identify which bits in the port should be included (0 - ignore)
MikamiUitOpen 2:dcaee06f6ccb 56 */
MikamiUitOpen 2:dcaee06f6ccb 57 PortOut(PortName port, int mask = 0xFFFFFFFF) {
MikamiUitOpen 2:dcaee06f6ccb 58 port_init(&_port, port, mask, PIN_OUTPUT);
MikamiUitOpen 2:dcaee06f6ccb 59 }
MikamiUitOpen 2:dcaee06f6ccb 60
MikamiUitOpen 2:dcaee06f6ccb 61 /** Write the value to the output port
MikamiUitOpen 2:dcaee06f6ccb 62 *
MikamiUitOpen 2:dcaee06f6ccb 63 * @param value An integer specifying a bit to write for every corresponding PortOut pin
MikamiUitOpen 2:dcaee06f6ccb 64 */
MikamiUitOpen 2:dcaee06f6ccb 65 void write(int value) {
MikamiUitOpen 2:dcaee06f6ccb 66 port_write(&_port, value);
MikamiUitOpen 2:dcaee06f6ccb 67 }
MikamiUitOpen 2:dcaee06f6ccb 68
MikamiUitOpen 2:dcaee06f6ccb 69 /** Read the value currently output on the port
MikamiUitOpen 2:dcaee06f6ccb 70 *
MikamiUitOpen 2:dcaee06f6ccb 71 * @returns
MikamiUitOpen 2:dcaee06f6ccb 72 * An integer with each bit corresponding to associated PortOut pin setting
MikamiUitOpen 2:dcaee06f6ccb 73 */
MikamiUitOpen 2:dcaee06f6ccb 74 int read() {
MikamiUitOpen 2:dcaee06f6ccb 75 return port_read(&_port);
MikamiUitOpen 2:dcaee06f6ccb 76 }
MikamiUitOpen 2:dcaee06f6ccb 77
MikamiUitOpen 2:dcaee06f6ccb 78 /** A shorthand for write()
MikamiUitOpen 2:dcaee06f6ccb 79 */
MikamiUitOpen 2:dcaee06f6ccb 80 PortOut& operator= (int value) {
MikamiUitOpen 2:dcaee06f6ccb 81 write(value);
MikamiUitOpen 2:dcaee06f6ccb 82 return *this;
MikamiUitOpen 2:dcaee06f6ccb 83 }
MikamiUitOpen 2:dcaee06f6ccb 84
MikamiUitOpen 2:dcaee06f6ccb 85 PortOut& operator= (PortOut& rhs) {
MikamiUitOpen 2:dcaee06f6ccb 86 write(rhs.read());
MikamiUitOpen 2:dcaee06f6ccb 87 return *this;
MikamiUitOpen 2:dcaee06f6ccb 88 }
MikamiUitOpen 2:dcaee06f6ccb 89
MikamiUitOpen 2:dcaee06f6ccb 90 /** A shorthand for read()
MikamiUitOpen 2:dcaee06f6ccb 91 */
MikamiUitOpen 2:dcaee06f6ccb 92 operator int() {
MikamiUitOpen 2:dcaee06f6ccb 93 return read();
MikamiUitOpen 2:dcaee06f6ccb 94 }
MikamiUitOpen 2:dcaee06f6ccb 95
MikamiUitOpen 2:dcaee06f6ccb 96 private:
MikamiUitOpen 2:dcaee06f6ccb 97 port_t _port;
MikamiUitOpen 2:dcaee06f6ccb 98 };
MikamiUitOpen 2:dcaee06f6ccb 99
MikamiUitOpen 2:dcaee06f6ccb 100 } // namespace mbed
MikamiUitOpen 2:dcaee06f6ccb 101
MikamiUitOpen 2:dcaee06f6ccb 102 #endif
MikamiUitOpen 2:dcaee06f6ccb 103
MikamiUitOpen 2:dcaee06f6ccb 104 #endif