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/common/FileSystemLike.cpp@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?
User | Revision | Line number | New contents of line |
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MikamiUitOpen | 2:cf42e62a97dc | 1 | /* mbed Microcontroller Library |
MikamiUitOpen | 2:cf42e62a97dc | 2 | * Copyright (c) 2006-2013 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 | #include "FileSystemLike.h" |
MikamiUitOpen | 2:cf42e62a97dc | 17 | |
MikamiUitOpen | 2:cf42e62a97dc | 18 | namespace mbed { |
MikamiUitOpen | 2:cf42e62a97dc | 19 | |
MikamiUitOpen | 2:cf42e62a97dc | 20 | class BaseDirHandle : public DirHandle { |
MikamiUitOpen | 2:cf42e62a97dc | 21 | public: |
MikamiUitOpen | 2:cf42e62a97dc | 22 | /* |
MikamiUitOpen | 2:cf42e62a97dc | 23 | We keep track of our current location as the n'th object in the |
MikamiUitOpen | 2:cf42e62a97dc | 24 | FileSystemLike list. Using a Base* instead would cause problems if that |
MikamiUitOpen | 2:cf42e62a97dc | 25 | object were to be destroyed between readdirs. |
MikamiUitOpen | 2:cf42e62a97dc | 26 | Using this method does mean though that destroying/creating objects can |
MikamiUitOpen | 2:cf42e62a97dc | 27 | give unusual results from readdir. |
MikamiUitOpen | 2:cf42e62a97dc | 28 | */ |
MikamiUitOpen | 2:cf42e62a97dc | 29 | off_t n; |
MikamiUitOpen | 2:cf42e62a97dc | 30 | struct dirent cur_entry; |
MikamiUitOpen | 2:cf42e62a97dc | 31 | |
MikamiUitOpen | 2:cf42e62a97dc | 32 | BaseDirHandle() : n(0), cur_entry() { |
MikamiUitOpen | 2:cf42e62a97dc | 33 | } |
MikamiUitOpen | 2:cf42e62a97dc | 34 | |
MikamiUitOpen | 2:cf42e62a97dc | 35 | virtual int closedir() { |
MikamiUitOpen | 2:cf42e62a97dc | 36 | delete this; |
MikamiUitOpen | 2:cf42e62a97dc | 37 | return 0; |
MikamiUitOpen | 2:cf42e62a97dc | 38 | } |
MikamiUitOpen | 2:cf42e62a97dc | 39 | |
MikamiUitOpen | 2:cf42e62a97dc | 40 | virtual struct dirent *readdir() { |
MikamiUitOpen | 2:cf42e62a97dc | 41 | FileBase *ptr = FileBase::get(n); |
MikamiUitOpen | 2:cf42e62a97dc | 42 | if (ptr == NULL) return NULL; |
MikamiUitOpen | 2:cf42e62a97dc | 43 | |
MikamiUitOpen | 2:cf42e62a97dc | 44 | /* Increment n, so next readdir gets the next item */ |
MikamiUitOpen | 2:cf42e62a97dc | 45 | n++; |
MikamiUitOpen | 2:cf42e62a97dc | 46 | |
MikamiUitOpen | 2:cf42e62a97dc | 47 | /* Setup cur entry and return a pointer to it */ |
MikamiUitOpen | 2:cf42e62a97dc | 48 | std::strncpy(cur_entry.d_name, ptr->getName(), NAME_MAX); |
MikamiUitOpen | 2:cf42e62a97dc | 49 | return &cur_entry; |
MikamiUitOpen | 2:cf42e62a97dc | 50 | } |
MikamiUitOpen | 2:cf42e62a97dc | 51 | |
MikamiUitOpen | 2:cf42e62a97dc | 52 | virtual off_t telldir() { |
MikamiUitOpen | 2:cf42e62a97dc | 53 | return n; |
MikamiUitOpen | 2:cf42e62a97dc | 54 | } |
MikamiUitOpen | 2:cf42e62a97dc | 55 | |
MikamiUitOpen | 2:cf42e62a97dc | 56 | virtual void seekdir(off_t offset) { |
MikamiUitOpen | 2:cf42e62a97dc | 57 | n = offset; |
MikamiUitOpen | 2:cf42e62a97dc | 58 | } |
MikamiUitOpen | 2:cf42e62a97dc | 59 | |
MikamiUitOpen | 2:cf42e62a97dc | 60 | virtual void rewinddir() { |
MikamiUitOpen | 2:cf42e62a97dc | 61 | n = 0; |
MikamiUitOpen | 2:cf42e62a97dc | 62 | } |
MikamiUitOpen | 2:cf42e62a97dc | 63 | }; |
MikamiUitOpen | 2:cf42e62a97dc | 64 | |
MikamiUitOpen | 2:cf42e62a97dc | 65 | FileSystemLike::FileSystemLike(const char *name) : FileBase(name, FileSystemPathType) { |
MikamiUitOpen | 2:cf42e62a97dc | 66 | |
MikamiUitOpen | 2:cf42e62a97dc | 67 | } |
MikamiUitOpen | 2:cf42e62a97dc | 68 | |
MikamiUitOpen | 2:cf42e62a97dc | 69 | FileSystemLike::~FileSystemLike() { |
MikamiUitOpen | 2:cf42e62a97dc | 70 | |
MikamiUitOpen | 2:cf42e62a97dc | 71 | } |
MikamiUitOpen | 2:cf42e62a97dc | 72 | |
MikamiUitOpen | 2:cf42e62a97dc | 73 | DirHandle *FileSystemLike::opendir() { |
MikamiUitOpen | 2:cf42e62a97dc | 74 | return new BaseDirHandle(); |
MikamiUitOpen | 2:cf42e62a97dc | 75 | } |
MikamiUitOpen | 2:cf42e62a97dc | 76 | |
MikamiUitOpen | 2:cf42e62a97dc | 77 | } // namespace mbed |