Basic fading in and out of leds with light sensor.

Dependencies:   mbed

Committer:
mturner5
Date:
Mon Sep 19 03:24:58 2016 +0000
Revision:
0:cf7af2656659
Basic v1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mturner5 0:cf7af2656659 1 /* mbed Microcontroller Library
mturner5 0:cf7af2656659 2 * Copyright (c) 2006-2013 ARM Limited
mturner5 0:cf7af2656659 3 *
mturner5 0:cf7af2656659 4 * Licensed under the Apache License, Version 2.0 (the "License");
mturner5 0:cf7af2656659 5 * you may not use this file except in compliance with the License.
mturner5 0:cf7af2656659 6 * You may obtain a copy of the License at
mturner5 0:cf7af2656659 7 *
mturner5 0:cf7af2656659 8 * http://www.apache.org/licenses/LICENSE-2.0
mturner5 0:cf7af2656659 9 *
mturner5 0:cf7af2656659 10 * Unless required by applicable law or agreed to in writing, software
mturner5 0:cf7af2656659 11 * distributed under the License is distributed on an "AS IS" BASIS,
mturner5 0:cf7af2656659 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mturner5 0:cf7af2656659 13 * See the License for the specific language governing permissions and
mturner5 0:cf7af2656659 14 * limitations under the License.
mturner5 0:cf7af2656659 15 */
mturner5 0:cf7af2656659 16 #ifndef MBED_DIRHANDLE_H
mturner5 0:cf7af2656659 17 #define MBED_DIRHANDLE_H
mturner5 0:cf7af2656659 18
mturner5 0:cf7af2656659 19 #if defined(__ARMCC_VERSION) || defined(__ICCARM__)
mturner5 0:cf7af2656659 20 # define NAME_MAX 255
mturner5 0:cf7af2656659 21 typedef int mode_t;
mturner5 0:cf7af2656659 22
mturner5 0:cf7af2656659 23 #else
mturner5 0:cf7af2656659 24 # include <sys/syslimits.h>
mturner5 0:cf7af2656659 25 #endif
mturner5 0:cf7af2656659 26
mturner5 0:cf7af2656659 27 #include "FileHandle.h"
mturner5 0:cf7af2656659 28
mturner5 0:cf7af2656659 29 struct dirent {
mturner5 0:cf7af2656659 30 char d_name[NAME_MAX+1];
mturner5 0:cf7af2656659 31 };
mturner5 0:cf7af2656659 32
mturner5 0:cf7af2656659 33 namespace mbed {
mturner5 0:cf7af2656659 34
mturner5 0:cf7af2656659 35 /** Represents a directory stream. Objects of this type are returned
mturner5 0:cf7af2656659 36 * by a FileSystemLike's opendir method. Implementations must define
mturner5 0:cf7af2656659 37 * at least closedir, readdir and rewinddir.
mturner5 0:cf7af2656659 38 *
mturner5 0:cf7af2656659 39 * If a FileSystemLike class defines the opendir method, then the
mturner5 0:cf7af2656659 40 * directories of an object of that type can be accessed by
mturner5 0:cf7af2656659 41 * DIR *d = opendir("/example/directory") (or opendir("/example")
mturner5 0:cf7af2656659 42 * to open the root of the filesystem), and then using readdir(d) etc.
mturner5 0:cf7af2656659 43 *
mturner5 0:cf7af2656659 44 * The root directory is considered to contain all FileLike and
mturner5 0:cf7af2656659 45 * FileSystemLike objects, so the DIR* returned by opendir("/") will
mturner5 0:cf7af2656659 46 * reflect this.
mturner5 0:cf7af2656659 47 */
mturner5 0:cf7af2656659 48 class DirHandle {
mturner5 0:cf7af2656659 49
mturner5 0:cf7af2656659 50 public:
mturner5 0:cf7af2656659 51 /** Closes the directory.
mturner5 0:cf7af2656659 52 *
mturner5 0:cf7af2656659 53 * @returns
mturner5 0:cf7af2656659 54 * 0 on success,
mturner5 0:cf7af2656659 55 * -1 on error.
mturner5 0:cf7af2656659 56 */
mturner5 0:cf7af2656659 57 virtual int closedir()=0;
mturner5 0:cf7af2656659 58
mturner5 0:cf7af2656659 59 /** Return the directory entry at the current position, and
mturner5 0:cf7af2656659 60 * advances the position to the next entry.
mturner5 0:cf7af2656659 61 *
mturner5 0:cf7af2656659 62 * @returns
mturner5 0:cf7af2656659 63 * A pointer to a dirent structure representing the
mturner5 0:cf7af2656659 64 * directory entry at the current position, or NULL on reaching
mturner5 0:cf7af2656659 65 * end of directory or error.
mturner5 0:cf7af2656659 66 */
mturner5 0:cf7af2656659 67 virtual struct dirent *readdir()=0;
mturner5 0:cf7af2656659 68
mturner5 0:cf7af2656659 69 /** Resets the position to the beginning of the directory.
mturner5 0:cf7af2656659 70 */
mturner5 0:cf7af2656659 71 virtual void rewinddir()=0;
mturner5 0:cf7af2656659 72
mturner5 0:cf7af2656659 73 /** Returns the current position of the DirHandle.
mturner5 0:cf7af2656659 74 *
mturner5 0:cf7af2656659 75 * @returns
mturner5 0:cf7af2656659 76 * the current position,
mturner5 0:cf7af2656659 77 * -1 on error.
mturner5 0:cf7af2656659 78 */
mturner5 0:cf7af2656659 79 virtual off_t telldir() { return -1; }
mturner5 0:cf7af2656659 80
mturner5 0:cf7af2656659 81 /** Sets the position of the DirHandle.
mturner5 0:cf7af2656659 82 *
mturner5 0:cf7af2656659 83 * @param location The location to seek to. Must be a value returned by telldir.
mturner5 0:cf7af2656659 84 */
mturner5 0:cf7af2656659 85 virtual void seekdir(off_t location) { }
mturner5 0:cf7af2656659 86
mturner5 0:cf7af2656659 87 virtual ~DirHandle() {}
mturner5 0:cf7af2656659 88 };
mturner5 0:cf7af2656659 89
mturner5 0:cf7af2656659 90 } // namespace mbed
mturner5 0:cf7af2656659 91
mturner5 0:cf7af2656659 92 typedef mbed::DirHandle DIR;
mturner5 0:cf7af2656659 93
mturner5 0:cf7af2656659 94 extern "C" {
mturner5 0:cf7af2656659 95 DIR *opendir(const char*);
mturner5 0:cf7af2656659 96 struct dirent *readdir(DIR *);
mturner5 0:cf7af2656659 97 int closedir(DIR*);
mturner5 0:cf7af2656659 98 void rewinddir(DIR*);
mturner5 0:cf7af2656659 99 long telldir(DIR*);
mturner5 0:cf7af2656659 100 void seekdir(DIR*, long);
mturner5 0:cf7af2656659 101 int mkdir(const char *name, mode_t n);
mturner5 0:cf7af2656659 102 };
mturner5 0:cf7af2656659 103
mturner5 0:cf7af2656659 104 #endif /* MBED_DIRHANDLE_H */