不韋 呂 / F746_AcousticEffector_MIC

Audio singal input and output example for DISCO-F746. Input: MEMS mic, Output: CN10 OUT, Acoustic effect: echo and frequency shift. DISCO-F746 によるオーディオ信号入出力．入力：MEMS マイク，出力：CN10 OUT，音響効果：エコー，周波数変換．

Dependencies:   F746_GUI F746_SAI_IO

mbed_src_STM32F7/common/FileSystemLike.cpp@10:56f2f01df983, 2017-04-10 (annotated)

Committer:
MikamiUitOpen
Date:
Mon Apr 10 13:44:13 2017 +0000
Revision:
10:56f2f01df983
Parent:
6:38f7dce055d0 
11

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 6:38f7dce055d0 1 /* mbed Microcontroller Library
MikamiUitOpen 6:38f7dce055d0 2 * Copyright (c) 2006-2013 ARM Limited
MikamiUitOpen 6:38f7dce055d0 3 *
MikamiUitOpen 6:38f7dce055d0 4 * Licensed under the Apache License, Version 2.0 (the "License");
MikamiUitOpen 6:38f7dce055d0 5 * you may not use this file except in compliance with the License.
MikamiUitOpen 6:38f7dce055d0 6 * You may obtain a copy of the License at
MikamiUitOpen 6:38f7dce055d0 7 *
MikamiUitOpen 6:38f7dce055d0 8 * http://www.apache.org/licenses/LICENSE-2.0
MikamiUitOpen 6:38f7dce055d0 9 *
MikamiUitOpen 6:38f7dce055d0 10 * Unless required by applicable law or agreed to in writing, software
MikamiUitOpen 6:38f7dce055d0 11 * distributed under the License is distributed on an "AS IS" BASIS,
MikamiUitOpen 6:38f7dce055d0 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
MikamiUitOpen 6:38f7dce055d0 13 * See the License for the specific language governing permissions and
MikamiUitOpen 6:38f7dce055d0 14 * limitations under the License.
MikamiUitOpen 6:38f7dce055d0 15 */
MikamiUitOpen 6:38f7dce055d0 16 #include "FileSystemLike.h"
MikamiUitOpen 6:38f7dce055d0 17
MikamiUitOpen 6:38f7dce055d0 18 namespace mbed {
MikamiUitOpen 6:38f7dce055d0 19
MikamiUitOpen 6:38f7dce055d0 20 class BaseDirHandle : public DirHandle {
MikamiUitOpen 6:38f7dce055d0 21 public:
MikamiUitOpen 6:38f7dce055d0 22 /*
MikamiUitOpen 6:38f7dce055d0 23 We keep track of our current location as the n'th object in the
MikamiUitOpen 6:38f7dce055d0 24 FileSystemLike list. Using a Base* instead would cause problems if that
MikamiUitOpen 6:38f7dce055d0 25 object were to be destroyed between readdirs.
MikamiUitOpen 6:38f7dce055d0 26 Using this method does mean though that destroying/creating objects can
MikamiUitOpen 6:38f7dce055d0 27 give unusual results from readdir.
MikamiUitOpen 6:38f7dce055d0 28 */
MikamiUitOpen 6:38f7dce055d0 29 off_t n;
MikamiUitOpen 6:38f7dce055d0 30 struct dirent cur_entry;
MikamiUitOpen 6:38f7dce055d0 31
MikamiUitOpen 6:38f7dce055d0 32 BaseDirHandle() : n(0), cur_entry() {
MikamiUitOpen 6:38f7dce055d0 33 }
MikamiUitOpen 6:38f7dce055d0 34
MikamiUitOpen 6:38f7dce055d0 35 virtual int closedir() {
MikamiUitOpen 6:38f7dce055d0 36 delete this;
MikamiUitOpen 6:38f7dce055d0 37 return 0;
MikamiUitOpen 6:38f7dce055d0 38 }
MikamiUitOpen 6:38f7dce055d0 39
MikamiUitOpen 6:38f7dce055d0 40 virtual struct dirent *readdir() {
MikamiUitOpen 6:38f7dce055d0 41 FileBase *ptr = FileBase::get(n);
MikamiUitOpen 6:38f7dce055d0 42 if (ptr == NULL) return NULL;
MikamiUitOpen 6:38f7dce055d0 43
MikamiUitOpen 6:38f7dce055d0 44 /* Increment n, so next readdir gets the next item */
MikamiUitOpen 6:38f7dce055d0 45 n++;
MikamiUitOpen 6:38f7dce055d0 46
MikamiUitOpen 6:38f7dce055d0 47 /* Setup cur entry and return a pointer to it */
MikamiUitOpen 6:38f7dce055d0 48 std::strncpy(cur_entry.d_name, ptr->getName(), NAME_MAX);
MikamiUitOpen 6:38f7dce055d0 49 return &cur_entry;
MikamiUitOpen 6:38f7dce055d0 50 }
MikamiUitOpen 6:38f7dce055d0 51
MikamiUitOpen 6:38f7dce055d0 52 virtual off_t telldir() {
MikamiUitOpen 6:38f7dce055d0 53 return n;
MikamiUitOpen 6:38f7dce055d0 54 }
MikamiUitOpen 6:38f7dce055d0 55
MikamiUitOpen 6:38f7dce055d0 56 virtual void seekdir(off_t offset) {
MikamiUitOpen 6:38f7dce055d0 57 n = offset;
MikamiUitOpen 6:38f7dce055d0 58 }
MikamiUitOpen 6:38f7dce055d0 59
MikamiUitOpen 6:38f7dce055d0 60 virtual void rewinddir() {
MikamiUitOpen 6:38f7dce055d0 61 n = 0;
MikamiUitOpen 6:38f7dce055d0 62 }
MikamiUitOpen 6:38f7dce055d0 63 };
MikamiUitOpen 6:38f7dce055d0 64
MikamiUitOpen 6:38f7dce055d0 65 FileSystemLike::FileSystemLike(const char *name) : FileBase(name, FileSystemPathType) {
MikamiUitOpen 6:38f7dce055d0 66
MikamiUitOpen 6:38f7dce055d0 67 }
MikamiUitOpen 6:38f7dce055d0 68
MikamiUitOpen 6:38f7dce055d0 69 FileSystemLike::~FileSystemLike() {
MikamiUitOpen 6:38f7dce055d0 70
MikamiUitOpen 6:38f7dce055d0 71 }
MikamiUitOpen 6:38f7dce055d0 72
MikamiUitOpen 6:38f7dce055d0 73 DirHandle *FileSystemLike::opendir() {
MikamiUitOpen 6:38f7dce055d0 74 return new BaseDirHandle();
MikamiUitOpen 6:38f7dce055d0 75 }
MikamiUitOpen 6:38f7dce055d0 76
MikamiUitOpen 6:38f7dce055d0 77 } // namespace mbed