Jukebox program written in ARM assembly for an Xilinx Spartan-3 FPGA controller
More information on the board and hardware specifications can be found here .
; Contains files: ; ♫ Main.s overall definitions, ; setup, user code, svc interface, ; stack definitions ; ; ♩ Music.s music note definitions, ; svc function to play a note, ; library function to read a song ; and to terminate one ; ; ♬ Playlist.s contains an AWESOME collection ; of songs. Want your own songs? ; Edit this file =) ; ; ♪ Interrupt.s interrupt service routine, ; interrupt acknowledgement and ; timer compare update ; ; ♩ Keypad.s keypad setup and functions ; to poll the keypad or a specific row ; ; ♫ Display.s svc functions to print a char, ; clear the screen and library ; function to print a string ; ; ♬ Buttons.s library functions to poll the ; lower and upper buttons ; ; ; Usage: ; ♫ The program starts with a blank screen and no songs ; being played. ; ; ♪ As soon as a keypad key is pressed the corresponding ; song title is printed and the song starts playing. ; ; ♬ Songs can be interrupted at any time by pressing a ; keypad key, which issues a new song to be played. ; ; ♫ The octaves of notes in a song can be increased ; by pressing the upper button or decreased by ; pressing the lower button. These changes are ; discarted once a new song is issued. ; ; ♩ If a song finishes playing, the screen will go ; blank, waiting for a new song to be chosen.
Songs in the file Playlist.s are in the format
song_[id] DEFB "Song name", 0 DEFB "CcDdEFfGgAaB", 0
Upper case letters represent soft notes C, D, E, F, G, A, B
Lower case letters represent sharp nodes C#, D#, F#, G#, A#
The notes are defined on Music.s based on the following periods for octave 4.
_C EQU 8000 ; Do / C _Cs EQU 7552 ; / C# _D EQU 7128 ; Re / D _Ds EQU 6728 ; / D# _E EQU 6352 ; Mi / E _F EQU 5992 ; Fa / F _Fs EQU 5656 ; / F# _G EQU 5336 ; Sol / G _Gs EQU 5040 ; / G# _A EQU 4760 ; La / A _As EQU 4488 ; / A# _B EQU 4240 ; Ti / B
Octaves can be changed based on the right/left arrow click and will shift such values upwards/downwards.