Micah B / mbed

mbed

Dependents:   DHTSensor_Test K64F_eCompass_OneNET_JW

LocalFileSystem.h@0:2cc6bb4d7fea, 2015-02-25 (annotated)

Committer:
mbotkinl
Date:
Wed Feb 25 20:22:22 2015 +0000
Revision:
0:2cc6bb4d7fea
Working code to read Temperature and Humidity readings

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbotkinl 0:2cc6bb4d7fea 1 /* mbed Microcontroller Library
mbotkinl 0:2cc6bb4d7fea 2 * Copyright (c) 2006-2013 ARM Limited
mbotkinl 0:2cc6bb4d7fea 3 *
mbotkinl 0:2cc6bb4d7fea 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbotkinl 0:2cc6bb4d7fea 5 * you may not use this file except in compliance with the License.
mbotkinl 0:2cc6bb4d7fea 6 * You may obtain a copy of the License at
mbotkinl 0:2cc6bb4d7fea 7 *
mbotkinl 0:2cc6bb4d7fea 8 * http://www.apache.org/licenses/LICENSE-2.0
mbotkinl 0:2cc6bb4d7fea 9 *
mbotkinl 0:2cc6bb4d7fea 10 * Unless required by applicable law or agreed to in writing, software
mbotkinl 0:2cc6bb4d7fea 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbotkinl 0:2cc6bb4d7fea 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbotkinl 0:2cc6bb4d7fea 13 * See the License for the specific language governing permissions and
mbotkinl 0:2cc6bb4d7fea 14 * limitations under the License.
mbotkinl 0:2cc6bb4d7fea 15 */
mbotkinl 0:2cc6bb4d7fea 16 #ifndef MBED_LOCALFILESYSTEM_H
mbotkinl 0:2cc6bb4d7fea 17 #define MBED_LOCALFILESYSTEM_H
mbotkinl 0:2cc6bb4d7fea 18
mbotkinl 0:2cc6bb4d7fea 19 #include "platform.h"
mbotkinl 0:2cc6bb4d7fea 20
mbotkinl 0:2cc6bb4d7fea 21 #if DEVICE_LOCALFILESYSTEM
mbotkinl 0:2cc6bb4d7fea 22
mbotkinl 0:2cc6bb4d7fea 23 #include "FileSystemLike.h"
mbotkinl 0:2cc6bb4d7fea 24
mbotkinl 0:2cc6bb4d7fea 25 namespace mbed {
mbotkinl 0:2cc6bb4d7fea 26
mbotkinl 0:2cc6bb4d7fea 27 FILEHANDLE local_file_open(const char* name, int flags);
mbotkinl 0:2cc6bb4d7fea 28
mbotkinl 0:2cc6bb4d7fea 29 class LocalFileHandle : public FileHandle {
mbotkinl 0:2cc6bb4d7fea 30
mbotkinl 0:2cc6bb4d7fea 31 public:
mbotkinl 0:2cc6bb4d7fea 32 LocalFileHandle(FILEHANDLE fh);
mbotkinl 0:2cc6bb4d7fea 33
mbotkinl 0:2cc6bb4d7fea 34 virtual int close();
mbotkinl 0:2cc6bb4d7fea 35
mbotkinl 0:2cc6bb4d7fea 36 virtual ssize_t write(const void *buffer, size_t length);
mbotkinl 0:2cc6bb4d7fea 37
mbotkinl 0:2cc6bb4d7fea 38 virtual ssize_t read(void *buffer, size_t length);
mbotkinl 0:2cc6bb4d7fea 39
mbotkinl 0:2cc6bb4d7fea 40 virtual int isatty();
mbotkinl 0:2cc6bb4d7fea 41
mbotkinl 0:2cc6bb4d7fea 42 virtual off_t lseek(off_t position, int whence);
mbotkinl 0:2cc6bb4d7fea 43
mbotkinl 0:2cc6bb4d7fea 44 virtual int fsync();
mbotkinl 0:2cc6bb4d7fea 45
mbotkinl 0:2cc6bb4d7fea 46 virtual off_t flen();
mbotkinl 0:2cc6bb4d7fea 47
mbotkinl 0:2cc6bb4d7fea 48 protected:
mbotkinl 0:2cc6bb4d7fea 49 FILEHANDLE _fh;
mbotkinl 0:2cc6bb4d7fea 50 int pos;
mbotkinl 0:2cc6bb4d7fea 51 };
mbotkinl 0:2cc6bb4d7fea 52
mbotkinl 0:2cc6bb4d7fea 53 /** A filesystem for accessing the local mbed Microcontroller USB disk drive
mbotkinl 0:2cc6bb4d7fea 54 *
mbotkinl 0:2cc6bb4d7fea 55 * This allows programs to read and write files on the same disk drive that is used to program the
mbotkinl 0:2cc6bb4d7fea 56 * mbed Microcontroller. Once created, the standard C file access functions are used to open,
mbotkinl 0:2cc6bb4d7fea 57 * read and write files.
mbotkinl 0:2cc6bb4d7fea 58 *
mbotkinl 0:2cc6bb4d7fea 59 * Example:
mbotkinl 0:2cc6bb4d7fea 60 * @code
mbotkinl 0:2cc6bb4d7fea 61 * #include "mbed.h"
mbotkinl 0:2cc6bb4d7fea 62 *
mbotkinl 0:2cc6bb4d7fea 63 * LocalFileSystem local("local"); // Create the local filesystem under the name "local"
mbotkinl 0:2cc6bb4d7fea 64 *
mbotkinl 0:2cc6bb4d7fea 65 * int main() {
mbotkinl 0:2cc6bb4d7fea 66 * FILE *fp = fopen("/local/out.txt", "w"); // Open "out.txt" on the local file system for writing
mbotkinl 0:2cc6bb4d7fea 67 * fprintf(fp, "Hello World!");
mbotkinl 0:2cc6bb4d7fea 68 * fclose(fp);
mbotkinl 0:2cc6bb4d7fea 69 * remove("/local/out.txt"); // Removes the file "out.txt" from the local file system
mbotkinl 0:2cc6bb4d7fea 70 *
mbotkinl 0:2cc6bb4d7fea 71 * DIR *d = opendir("/local"); // Opens the root directory of the local file system
mbotkinl 0:2cc6bb4d7fea 72 * struct dirent *p;
mbotkinl 0:2cc6bb4d7fea 73 * while((p = readdir(d)) != NULL) { // Print the names of the files in the local file system
mbotkinl 0:2cc6bb4d7fea 74 * printf("%s\n", p->d_name); // to stdout.
mbotkinl 0:2cc6bb4d7fea 75 * }
mbotkinl 0:2cc6bb4d7fea 76 * closedir(d);
mbotkinl 0:2cc6bb4d7fea 77 * }
mbotkinl 0:2cc6bb4d7fea 78 * @endcode
mbotkinl 0:2cc6bb4d7fea 79 *
mbotkinl 0:2cc6bb4d7fea 80 * @note
mbotkinl 0:2cc6bb4d7fea 81 * If the microcontroller program makes an access to the local drive, it will be marked as "removed"
mbotkinl 0:2cc6bb4d7fea 82 * on the Host computer. This means it is no longer accessible from the Host Computer.
mbotkinl 0:2cc6bb4d7fea 83 *
mbotkinl 0:2cc6bb4d7fea 84 * The drive will only re-appear when the microcontroller program exists. Note that if the program does
mbotkinl 0:2cc6bb4d7fea 85 * not exit, you will need to hold down reset on the mbed Microcontroller to be able to see the drive again!
mbotkinl 0:2cc6bb4d7fea 86 */
mbotkinl 0:2cc6bb4d7fea 87 class LocalFileSystem : public FileSystemLike {
mbotkinl 0:2cc6bb4d7fea 88
mbotkinl 0:2cc6bb4d7fea 89 public:
mbotkinl 0:2cc6bb4d7fea 90 LocalFileSystem(const char* n) : FileSystemLike(n) {
mbotkinl 0:2cc6bb4d7fea 91
mbotkinl 0:2cc6bb4d7fea 92 }
mbotkinl 0:2cc6bb4d7fea 93
mbotkinl 0:2cc6bb4d7fea 94 virtual FileHandle *open(const char* name, int flags);
mbotkinl 0:2cc6bb4d7fea 95 virtual int remove(const char *filename);
mbotkinl 0:2cc6bb4d7fea 96 virtual DirHandle *opendir(const char *name);
mbotkinl 0:2cc6bb4d7fea 97 };
mbotkinl 0:2cc6bb4d7fea 98
mbotkinl 0:2cc6bb4d7fea 99 } // namespace mbed
mbotkinl 0:2cc6bb4d7fea 100
mbotkinl 0:2cc6bb4d7fea 101 #endif
mbotkinl 0:2cc6bb4d7fea 102
mbotkinl 0:2cc6bb4d7fea 103 #endif