$Id$
               __________               __   ___.
     Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
     Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
     Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
     Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
                       \/            \/     \/    \/            \/

                                 API summmary

[ This is still pretty rough and basic. Extend! ]

LCD

  #include <lcd.h>

  Generic

    Most LCD functions are specific for which output we work with, due to the
    huge differences.

    lcd_init() - init the LCD stuff
    lcd_clear_display() - clear the whole display
    lcd_backlight(on) - set backlight on/off
    lcd_puts(x,y,string) write a string at given character position

  Recorder
 
    All the functions operate on a display buffer. You make the buffer get
    shown on screen by calling lcd_update().

    lcd_update() update the LCD according to the internal buffer.
    lcd_setfont(int font) set default font
    lcd_setmargins(int x, int y) set top/left margins
    lcd_putsxy(x,y,string,font) put a string at given position, using a
                                specific font
    lcd_bitmap(src,x,y,width,height,clear) put a bitmap at given position
    lcd_clearrect(x,y,width,height) clear a rectangle area
    lcd_fillrect(x,y,width,height) fill a rectangle area
    lcd_drawrect(x,y,width,height) draw a rectangle
    lcd_invertrect(x,y,width,height) revert the graphics of the given area
    lcd_drawline(x1,y1,x2,y2) draw a line between the coordinates
    lcd_drawpixel(x,y) put a pixel on the given coordinate
    lcd_clearpixel(x,y) clear the pixel at the given coordinate
    lcd_fontsize(font,width,height) return the width and height of the font

  Player

    lcd_define_pattern(which,pattern,lenth) define a custom pattern

Buttons

  #include <button.h>

  These functions work the same regardless of which keypad you have, but they
  return a different set of values. Note that the Recorder keypad has 10
  keys, while the Player keypad only features 6.

  button_init() init button functions
  button_get() returns a bitmask for which keys were pressed

Files

  #include <file.h>

  open()
  read()
  lseek()
  write()
  close()
  rename()
  remove()

Directories

  #include <dir.h>

  opendir()
  readdir()
  closedir()

String/Memory

  #include <string.h>

  strcmp()
  strcpy()
  memcpy()
  memset()
  ...

ID3

  #include <id3.h>
  bool mp3info(mp3entry *entry, char *filename);

    Return FALSE if successful. The given mp3entry is then filled in with
    whatever id3 info it could find about the given file.

Various

  #include <kernel.h>

  sleep(ticks) - sleep a specified number of ticks, we currently have HZ ticks
                 per second
