Tushar Sachdeva / FRDM_K64F_LCD

A simple 128x32 graphical LCD program to quickstart with LCD on ARM mbed IoT Starter Kit. This requires mbed Applciation Shield with FRDM-K64F platform.

Dependencies:   C12832

mbed/DirHandle.h@1:eb68c94a8ee5, 2015-04-12 (annotated)

Committer:
tushki7
Date:
Sun Apr 12 15:45:52 2015 +0000
Revision:
1:eb68c94a8ee5
Parent:
0:60d829a0353a 
A simple 128x32 LCD program with ARM mbed IoT Starter Kit;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
tushki7 0:60d829a0353a 1 /* mbed Microcontroller Library
tushki7 0:60d829a0353a 2 * Copyright (c) 2006-2013 ARM Limited
tushki7 0:60d829a0353a 3 *
tushki7 0:60d829a0353a 4 * Licensed under the Apache License, Version 2.0 (the "License");
tushki7 0:60d829a0353a 5 * you may not use this file except in compliance with the License.
tushki7 0:60d829a0353a 6 * You may obtain a copy of the License at
tushki7 0:60d829a0353a 7 *
tushki7 0:60d829a0353a 8 * http://www.apache.org/licenses/LICENSE-2.0
tushki7 0:60d829a0353a 9 *
tushki7 0:60d829a0353a 10 * Unless required by applicable law or agreed to in writing, software
tushki7 0:60d829a0353a 11 * distributed under the License is distributed on an "AS IS" BASIS,
tushki7 0:60d829a0353a 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
tushki7 0:60d829a0353a 13 * See the License for the specific language governing permissions and
tushki7 0:60d829a0353a 14 * limitations under the License.
tushki7 0:60d829a0353a 15 */
tushki7 0:60d829a0353a 16 #ifndef MBED_DIRHANDLE_H
tushki7 0:60d829a0353a 17 #define MBED_DIRHANDLE_H
tushki7 0:60d829a0353a 18
tushki7 0:60d829a0353a 19 #if defined(__ARMCC_VERSION) || defined(__ICCARM__)
tushki7 0:60d829a0353a 20 # define NAME_MAX 255
tushki7 0:60d829a0353a 21 typedef int mode_t;
tushki7 0:60d829a0353a 22
tushki7 0:60d829a0353a 23 #else
tushki7 0:60d829a0353a 24 # include <sys/syslimits.h>
tushki7 0:60d829a0353a 25 #endif
tushki7 0:60d829a0353a 26
tushki7 0:60d829a0353a 27 #include "FileHandle.h"
tushki7 0:60d829a0353a 28
tushki7 0:60d829a0353a 29 struct dirent {
tushki7 0:60d829a0353a 30 char d_name[NAME_MAX+1];
tushki7 0:60d829a0353a 31 };
tushki7 0:60d829a0353a 32
tushki7 0:60d829a0353a 33 namespace mbed {
tushki7 0:60d829a0353a 34
tushki7 0:60d829a0353a 35 /** Represents a directory stream. Objects of this type are returned
tushki7 0:60d829a0353a 36 * by a FileSystemLike's opendir method. Implementations must define
tushki7 0:60d829a0353a 37 * at least closedir, readdir and rewinddir.
tushki7 0:60d829a0353a 38 *
tushki7 0:60d829a0353a 39 * If a FileSystemLike class defines the opendir method, then the
tushki7 0:60d829a0353a 40 * directories of an object of that type can be accessed by
tushki7 0:60d829a0353a 41 * DIR *d = opendir("/example/directory") (or opendir("/example")
tushki7 0:60d829a0353a 42 * to open the root of the filesystem), and then using readdir(d) etc.
tushki7 0:60d829a0353a 43 *
tushki7 0:60d829a0353a 44 * The root directory is considered to contain all FileLike and
tushki7 0:60d829a0353a 45 * FileSystemLike objects, so the DIR* returned by opendir("/") will
tushki7 0:60d829a0353a 46 * reflect this.
tushki7 0:60d829a0353a 47 */
tushki7 0:60d829a0353a 48 class DirHandle {
tushki7 0:60d829a0353a 49
tushki7 0:60d829a0353a 50 public:
tushki7 0:60d829a0353a 51 /** Closes the directory.
tushki7 0:60d829a0353a 52 *
tushki7 0:60d829a0353a 53 * @returns
tushki7 0:60d829a0353a 54 * 0 on success,
tushki7 0:60d829a0353a 55 * -1 on error.
tushki7 0:60d829a0353a 56 */
tushki7 0:60d829a0353a 57 virtual int closedir()=0;
tushki7 0:60d829a0353a 58
tushki7 0:60d829a0353a 59 /** Return the directory entry at the current position, and
tushki7 0:60d829a0353a 60 * advances the position to the next entry.
tushki7 0:60d829a0353a 61 *
tushki7 0:60d829a0353a 62 * @returns
tushki7 0:60d829a0353a 63 * A pointer to a dirent structure representing the
tushki7 0:60d829a0353a 64 * directory entry at the current position, or NULL on reaching
tushki7 0:60d829a0353a 65 * end of directory or error.
tushki7 0:60d829a0353a 66 */
tushki7 0:60d829a0353a 67 virtual struct dirent *readdir()=0;
tushki7 0:60d829a0353a 68
tushki7 0:60d829a0353a 69 /** Resets the position to the beginning of the directory.
tushki7 0:60d829a0353a 70 */
tushki7 0:60d829a0353a 71 virtual void rewinddir()=0;
tushki7 0:60d829a0353a 72
tushki7 0:60d829a0353a 73 /** Returns the current position of the DirHandle.
tushki7 0:60d829a0353a 74 *
tushki7 0:60d829a0353a 75 * @returns
tushki7 0:60d829a0353a 76 * the current position,
tushki7 0:60d829a0353a 77 * -1 on error.
tushki7 0:60d829a0353a 78 */
tushki7 0:60d829a0353a 79 virtual off_t telldir() { return -1; }
tushki7 0:60d829a0353a 80
tushki7 0:60d829a0353a 81 /** Sets the position of the DirHandle.
tushki7 0:60d829a0353a 82 *
tushki7 0:60d829a0353a 83 * @param location The location to seek to. Must be a value returned by telldir.
tushki7 0:60d829a0353a 84 */
tushki7 0:60d829a0353a 85 virtual void seekdir(off_t location) { }
tushki7 0:60d829a0353a 86
tushki7 0:60d829a0353a 87 virtual ~DirHandle() {}
tushki7 0:60d829a0353a 88 };
tushki7 0:60d829a0353a 89
tushki7 0:60d829a0353a 90 } // namespace mbed
tushki7 0:60d829a0353a 91
tushki7 0:60d829a0353a 92 typedef mbed::DirHandle DIR;
tushki7 0:60d829a0353a 93
tushki7 0:60d829a0353a 94 extern "C" {
tushki7 0:60d829a0353a 95 DIR *opendir(const char*);
tushki7 0:60d829a0353a 96 struct dirent *readdir(DIR *);
tushki7 0:60d829a0353a 97 int closedir(DIR*);
tushki7 0:60d829a0353a 98 void rewinddir(DIR*);
tushki7 0:60d829a0353a 99 long telldir(DIR*);
tushki7 0:60d829a0353a 100 void seekdir(DIR*, long);
tushki7 0:60d829a0353a 101 int mkdir(const char *name, mode_t n);
tushki7 0:60d829a0353a 102 };
tushki7 0:60d829a0353a 103
tushki7 0:60d829a0353a 104 #endif /* MBED_DIRHANDLE_H */