不韋 呂 / F746_SD_Player_Demo

Demo program for library named SD_PlayerSkeleton of SD card player skeleton. SD カードプレーヤのための骨組みとして使うためのライブラリ SD_PlayerSkeleton の使用例．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7月号で解説している．

Dependencies:   F746_GUI F746_SAI_IO SD_PlayerSkeleton

mbed_src_STM32F7/api/CircularBuffer.h@19:3c3833ec00d2, 2017-04-09 (annotated)

Committer:
MikamiUitOpen
Date:
Sun Apr 09 12:44:17 2017 +0000
Revision:
19:3c3833ec00d2
Parent:
2:cf42e62a97dc 
20

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 2:cf42e62a97dc 1 /* mbed Microcontroller Library
MikamiUitOpen 2:cf42e62a97dc 2 * Copyright (c) 2015 ARM Limited
MikamiUitOpen 2:cf42e62a97dc 3 *
MikamiUitOpen 2:cf42e62a97dc 4 * Licensed under the Apache License, Version 2.0 (the "License");
MikamiUitOpen 2:cf42e62a97dc 5 * you may not use this file except in compliance with the License.
MikamiUitOpen 2:cf42e62a97dc 6 * You may obtain a copy of the License at
MikamiUitOpen 2:cf42e62a97dc 7 *
MikamiUitOpen 2:cf42e62a97dc 8 * http://www.apache.org/licenses/LICENSE-2.0
MikamiUitOpen 2:cf42e62a97dc 9 *
MikamiUitOpen 2:cf42e62a97dc 10 * Unless required by applicable law or agreed to in writing, software
MikamiUitOpen 2:cf42e62a97dc 11 * distributed under the License is distributed on an "AS IS" BASIS,
MikamiUitOpen 2:cf42e62a97dc 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
MikamiUitOpen 2:cf42e62a97dc 13 * See the License for the specific language governing permissions and
MikamiUitOpen 2:cf42e62a97dc 14 * limitations under the License.
MikamiUitOpen 2:cf42e62a97dc 15 */
MikamiUitOpen 2:cf42e62a97dc 16 #ifndef MBED_CIRCULARBUFFER_H
MikamiUitOpen 2:cf42e62a97dc 17 #define MBED_CIRCULARBUFFER_H
MikamiUitOpen 2:cf42e62a97dc 18
MikamiUitOpen 2:cf42e62a97dc 19 namespace mbed {
MikamiUitOpen 2:cf42e62a97dc 20
MikamiUitOpen 2:cf42e62a97dc 21 /** Templated Circular buffer class
MikamiUitOpen 2:cf42e62a97dc 22 */
MikamiUitOpen 2:cf42e62a97dc 23 template<typename T, uint32_t BufferSize, typename CounterType = uint32_t>
MikamiUitOpen 2:cf42e62a97dc 24 class CircularBuffer {
MikamiUitOpen 2:cf42e62a97dc 25 public:
MikamiUitOpen 2:cf42e62a97dc 26 CircularBuffer() : _head(0), _tail(0), _full(false) {
MikamiUitOpen 2:cf42e62a97dc 27 }
MikamiUitOpen 2:cf42e62a97dc 28
MikamiUitOpen 2:cf42e62a97dc 29 ~CircularBuffer() {
MikamiUitOpen 2:cf42e62a97dc 30 }
MikamiUitOpen 2:cf42e62a97dc 31
MikamiUitOpen 2:cf42e62a97dc 32 /** Push the transaction to the buffer. This overwrites the buffer if it's
MikamiUitOpen 2:cf42e62a97dc 33 * full
MikamiUitOpen 2:cf42e62a97dc 34 *
MikamiUitOpen 2:cf42e62a97dc 35 * @param data Data to be pushed to the buffer
MikamiUitOpen 2:cf42e62a97dc 36 */
MikamiUitOpen 2:cf42e62a97dc 37 void push(const T& data) {
MikamiUitOpen 2:cf42e62a97dc 38 if (full()) {
MikamiUitOpen 2:cf42e62a97dc 39 _tail++;
MikamiUitOpen 2:cf42e62a97dc 40 _tail %= BufferSize;
MikamiUitOpen 2:cf42e62a97dc 41 }
MikamiUitOpen 2:cf42e62a97dc 42 _pool[_head++] = data;
MikamiUitOpen 2:cf42e62a97dc 43 _head %= BufferSize;
MikamiUitOpen 2:cf42e62a97dc 44 if (_head == _tail) {
MikamiUitOpen 2:cf42e62a97dc 45 _full = true;
MikamiUitOpen 2:cf42e62a97dc 46 }
MikamiUitOpen 2:cf42e62a97dc 47 }
MikamiUitOpen 2:cf42e62a97dc 48
MikamiUitOpen 2:cf42e62a97dc 49 /** Pop the transaction from the buffer
MikamiUitOpen 2:cf42e62a97dc 50 *
MikamiUitOpen 2:cf42e62a97dc 51 * @param data Data to be pushed to the buffer
MikamiUitOpen 2:cf42e62a97dc 52 * @return True if the buffer is not empty and data contains a transaction, false otherwise
MikamiUitOpen 2:cf42e62a97dc 53 */
MikamiUitOpen 2:cf42e62a97dc 54 bool pop(T& data) {
MikamiUitOpen 2:cf42e62a97dc 55 if (!empty()) {
MikamiUitOpen 2:cf42e62a97dc 56 data = _pool[_tail++];
MikamiUitOpen 2:cf42e62a97dc 57 _tail %= BufferSize;
MikamiUitOpen 2:cf42e62a97dc 58 _full = false;
MikamiUitOpen 2:cf42e62a97dc 59 return true;
MikamiUitOpen 2:cf42e62a97dc 60 }
MikamiUitOpen 2:cf42e62a97dc 61 return false;
MikamiUitOpen 2:cf42e62a97dc 62 }
MikamiUitOpen 2:cf42e62a97dc 63
MikamiUitOpen 2:cf42e62a97dc 64 /** Check if the buffer is empty
MikamiUitOpen 2:cf42e62a97dc 65 *
MikamiUitOpen 2:cf42e62a97dc 66 * @return True if the buffer is empty, false if not
MikamiUitOpen 2:cf42e62a97dc 67 */
MikamiUitOpen 2:cf42e62a97dc 68 bool empty() {
MikamiUitOpen 2:cf42e62a97dc 69 return (_head == _tail) && !_full;
MikamiUitOpen 2:cf42e62a97dc 70 }
MikamiUitOpen 2:cf42e62a97dc 71
MikamiUitOpen 2:cf42e62a97dc 72 /** Check if the buffer is full
MikamiUitOpen 2:cf42e62a97dc 73 *
MikamiUitOpen 2:cf42e62a97dc 74 * @return True if the buffer is full, false if not
MikamiUitOpen 2:cf42e62a97dc 75 */
MikamiUitOpen 2:cf42e62a97dc 76 bool full() {
MikamiUitOpen 2:cf42e62a97dc 77 return _full;
MikamiUitOpen 2:cf42e62a97dc 78 }
MikamiUitOpen 2:cf42e62a97dc 79
MikamiUitOpen 2:cf42e62a97dc 80 /** Reset the buffer
MikamiUitOpen 2:cf42e62a97dc 81 *
MikamiUitOpen 2:cf42e62a97dc 82 */
MikamiUitOpen 2:cf42e62a97dc 83 void reset() {
MikamiUitOpen 2:cf42e62a97dc 84 _head = 0;
MikamiUitOpen 2:cf42e62a97dc 85 _tail = 0;
MikamiUitOpen 2:cf42e62a97dc 86 _full = false;
MikamiUitOpen 2:cf42e62a97dc 87 }
MikamiUitOpen 2:cf42e62a97dc 88
MikamiUitOpen 2:cf42e62a97dc 89 private:
MikamiUitOpen 2:cf42e62a97dc 90 T _pool[BufferSize];
MikamiUitOpen 2:cf42e62a97dc 91 volatile CounterType _head;
MikamiUitOpen 2:cf42e62a97dc 92 volatile CounterType _tail;
MikamiUitOpen 2:cf42e62a97dc 93 volatile bool _full;
MikamiUitOpen 2:cf42e62a97dc 94 };
MikamiUitOpen 2:cf42e62a97dc 95
MikamiUitOpen 2:cf42e62a97dc 96 }
MikamiUitOpen 2:cf42e62a97dc 97
MikamiUitOpen 2:cf42e62a97dc 98 #endif