3 Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
11 [ This is still pretty rough and basic. Extend! ]
19 Most LCD functions are specific for which output we work with, due to the
22 lcd_init() - init the LCD stuff
23 lcd_clear_display() - clear the whole display
24 lcd_backlight(on) - set backlight on/off
25 lcd_puts(x,y,string) write a string at given character position
29 All the functions operate on a display buffer. You make the buffer get
30 shown on screen by calling lcd_update().
32 lcd_update() update the LCD according to the internal buffer.
33 lcd_setfont(int font) set default font
34 lcd_setmargins(int x, int y) set top/left margins
35 lcd_putsxy(x,y,string,font) put a string at given position, using a
37 lcd_bitmap(src,x,y,width,height,clear) put a bitmap at given position
38 lcd_clearrect(x,y,width,height) clear a rectangle area
39 lcd_fillrect(x,y,width,height) fill a rectangle area
40 lcd_drawrect(x,y,width,height) draw a rectangle
41 lcd_invertrect(x,y,width,height) revert the graphics of the given area
42 lcd_drawline(x1,y1,x2,y2) draw a line between the coordinates
43 lcd_drawpixel(x,y) put a pixel on the given coordinate
44 lcd_clearpixel(x,y) clear the pixel at the given coordinate
45 lcd_fontsize(font,width,height) return the width and height of the font
49 lcd_define_pattern(which,pattern,lenth) define a custom pattern
55 These functions work the same regardless of which keypad you have, but they
56 return a different set of values. Note that the Recorder keypad has 10
57 keys, while the Player keypad only features 6.
59 int button_get(bool block)
61 Returns a bitmask for which keys were pressed. If 'block' is set TRUE it
62 won't return until a key is pressed.
66 (These functions are POSIX look-alikes)
70 int open(const char *path, int oflag);
72 The open() function establishes the connection between a file and a file
73 descriptor. It creates an open file descrip- tion that refers to a file
74 and a file descriptor that refers to that open file description. The file
75 descriptor is used by other I/O functions to refer to that file.
77 int read(int fildes, void *buf, size_t nbyte);
79 The read() function attempts to read nbyte bytes from the file associated
80 with the open file descriptor, fildes, into the buffer pointed to by buf.
82 int lseek(int fildes, off_t offset, int whence);
84 The lseek() function sets the file pointer associated with the open file
85 descriptor specified by fildes as follows:
87 o If whence is SEEK_SET, the pointer is set to offset
90 o If whence is SEEK_CUR, the pointer is set to its
91 current location plus offset.
93 o If whence is SEEK_END, the pointer is set to the size
94 of the file plus offset.
96 int write(int fildes, const void *buf, size_t nbyte);
98 NOT CURRENTLY SUPPORTED.
100 write writes up to count bytes to the file referenced by the file
101 descriptor fd from the buffer starting at buf.
103 int close(int fildes);
105 The close() function will deallocate the file descriptor indicated by
106 fildes. To deallocate means to make the file descriptor available for
107 return by subsequent calls to open(2) or other functions that allocate
110 int rename(const char *old, const char *new);
112 NOT CURRENTLY SUPPORTED.
114 The rename() function changes the name of a file. The old argument points
115 to the pathname of the file to be renamed. The new argument points to the
116 new pathname of the file.
118 int remove(const char *pathname);
120 NOT CURRENTLY SUPPORTED.
122 remove deletes a name from the filesystem. It calls unlink for files,
123 and rmdir for directories.
130 DIR *opendir(const char *name);
132 The opendir() function opens a directory stream corresponding to the
133 directory name, and returns a pointer to the directory stream. The
134 stream is positioned at the first entry in the directory.
136 struct dirent *readdir(DIR *dir);
138 The readdir() function returns a pointer to a dirent structure
139 representing the next directory entry in the directory stream pointed to
140 by dir. It returns NULL on reaching the end-of-file or if an error
143 Add a description of the struct here.
145 int closedir(DIR *dir);
147 The closedir() function closes the directory stream associated with dir.
148 The directory stream descriptor dir is not available after this call.
165 void *malloc(size_t size);
167 malloc() allocates size bytes and returns a pointer to the allocated
168 memory. The memory is not cleared.
170 void free(void *ptr);
172 free() frees the memory space pointed to by ptr, which must have been
173 returned by a previous call to malloc(), calloc() or realloc().
174 Otherwise, or if free(ptr) has already been called before, undefined
177 void *realloc(void *ptr, size_t size);
179 realloc() changes the size of the memory block pointed to by ptr to size
180 bytes. The contents will be unchanged to the minimum of the old and new
181 sizes; newly allocated memory will be uninitialized. If ptr is NULL, the
182 call is equivalent to malloc(size); if size is equal to zero, the call is
183 equivalent to free(ptr). Unless ptr is NULL, it must have been returned
184 by an earlier call to malloc(), calloc() or realloc().
186 void *calloc(size_t nmemb, size_t size);
188 calloc() allocates memory for an array of nmemb elements of size bytes
189 each and returns a pointer to the allocated memory. The memory is set to
195 bool mp3info(mp3entry *entry, char *filename);
197 Return FALSE if successful. The given mp3entry is then filled in with
198 whatever id3 info it could find about the given file.
204 void kernel_init(void)
206 Inits the kernel and starts the tick interrupt
210 Sleep a specified number of ticks, we have HZ ticks per second.
214 Let another thread run. This should be used as soon as you have to "wait"
215 for something or similar, and also if you do anything that takes "a long
216 time". This function is the entire foundation that our "cooperative
217 multitasking" is based on. Use it.
219 int set_irq_level(int level)
221 Sets the interrupt level (0 = lowest, 15 = highest) and returns the
224 void queue_init(struct event_queue *q)
226 Initialize an event queue. The maximum number of events in a queue is
229 void queue_wait(struct event_queue *q, struct event *ev)
231 Receive an event in a queue, blocking the thread if the queue is empty.
233 void queue_post(struct event_queue *q, int id, void *data)
235 Post an event to a queue.
236 NOTE: Negative event ID's are for system use only!!!
238 bool queue_empty(struct event_queue* q)
240 Returns true if the queue is empty.
242 int queue_broadcast(int id, void *data)
244 Posts an event in all queues that has been initiated with queue_init().
245 Returns the number of queues that were posted to.
247 int tick_add_task(void (*f)(void))
249 Add a task to the tick task queue. The argument is a pointer to a
250 function that will be called every tick interrupt.
251 At most MAX_NUM_TICK_TASKS can be active at the same time.
253 int tick_remove_task(void (*f)(void))
255 Remove a task from the task queue.
257 void mutex_init(struct mutex *m)
261 void mutex_lock(struct mutex *m)
263 Lock a mutex. This will block the thread if the mutex is already locked.
264 Note that you will geta deadlock if you lock the mutex twice!
266 void mutex_unlock(struct mutex *m)