mbed library sources: Modified to operate FRDM-KL25Z at 48MHz from internal 32kHz oscillator (nothing else changed).
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FileSystemLike.cpp
00001 /* mbed Microcontroller Library 00002 * Copyright (c) 2006-2013 ARM Limited 00003 * 00004 * Licensed under the Apache License, Version 2.0 (the "License"); 00005 * you may not use this file except in compliance with the License. 00006 * You may obtain a copy of the License at 00007 * 00008 * http://www.apache.org/licenses/LICENSE-2.0 00009 * 00010 * Unless required by applicable law or agreed to in writing, software 00011 * distributed under the License is distributed on an "AS IS" BASIS, 00012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00013 * See the License for the specific language governing permissions and 00014 * limitations under the License. 00015 */ 00016 #include "FileSystemLike.h" 00017 00018 namespace mbed { 00019 00020 class BaseDirHandle : public DirHandle { 00021 public: 00022 /* 00023 We keep track of our current location as the n'th object in the 00024 FileSystemLike list. Using a Base* instead would cause problems if that 00025 object were to be destroyed between readdirs. 00026 Using this method does mean though that destroying/creating objects can 00027 give unusual results from readdir. 00028 */ 00029 off_t n; 00030 struct dirent cur_entry; 00031 00032 BaseDirHandle() { 00033 n = 0; 00034 } 00035 00036 virtual int closedir() { 00037 delete this; 00038 return 0; 00039 } 00040 00041 virtual struct dirent *readdir() { 00042 FileBase *ptr = FileBase::get(n); 00043 if (ptr == NULL) return NULL; 00044 00045 /* Increment n, so next readdir gets the next item */ 00046 n++; 00047 00048 /* Setup cur entry and return a pointer to it */ 00049 std::strncpy(cur_entry.d_name, ptr->getName(), NAME_MAX); 00050 return &cur_entry; 00051 } 00052 00053 virtual off_t telldir() { 00054 return n; 00055 } 00056 00057 virtual void seekdir(off_t offset) { 00058 n = offset; 00059 } 00060 00061 virtual void rewinddir() { 00062 n = 0; 00063 } 00064 }; 00065 00066 FileSystemLike::FileSystemLike(const char *name) : FileBase(name, FileSystemPathType) { 00067 00068 } 00069 00070 FileSystemLike::~FileSystemLike() { 00071 00072 } 00073 00074 DirHandle *FileSystemLike::opendir() { 00075 return new BaseDirHandle(); 00076 } 00077 00078 } // namespace mbed
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