Realtime spectrogram for DISCO-F746NG. On-board MEMS microphone is used for input sound signal. リアルタイムスペクトログラム.入力:MEMSマイク
Dependencies: F746_GUI F746_SAI_IO UIT_FFT_Real
mbed_src_STM32F7/common/FileSystemLike.cpp
- Committer:
- MikamiUitOpen
- Date:
- 2016-10-02
- Revision:
- 4:c1beacfc42c7
File content as of revision 4:c1beacfc42c7:
/* mbed Microcontroller Library * Copyright (c) 2006-2013 ARM Limited * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "FileSystemLike.h" namespace mbed { class BaseDirHandle : public DirHandle { public: /* We keep track of our current location as the n'th object in the FileSystemLike list. Using a Base* instead would cause problems if that object were to be destroyed between readdirs. Using this method does mean though that destroying/creating objects can give unusual results from readdir. */ off_t n; struct dirent cur_entry; BaseDirHandle() : n(0), cur_entry() { } virtual int closedir() { delete this; return 0; } virtual struct dirent *readdir() { FileBase *ptr = FileBase::get(n); if (ptr == NULL) return NULL; /* Increment n, so next readdir gets the next item */ n++; /* Setup cur entry and return a pointer to it */ std::strncpy(cur_entry.d_name, ptr->getName(), NAME_MAX); return &cur_entry; } virtual off_t telldir() { return n; } virtual void seekdir(off_t offset) { n = offset; } virtual void rewinddir() { n = 0; } }; FileSystemLike::FileSystemLike(const char *name) : FileBase(name, FileSystemPathType) { } FileSystemLike::~FileSystemLike() { } DirHandle *FileSystemLike::opendir() { return new BaseDirHandle(); } } // namespace mbed