DuinoMite controls MP3 player – Add voice and music to your embedded projects

MOD-MP3-X is smart MP3 player build with VS1053 MP3 decoder and STM32F103RBT6 Cortex M3 microcontroller. It can work in two modes – stand alone MP3 player and Smart MP3 player controllable via RS232. In stand alone mode you can control MOD-MP3-X with slide switch to play/stop forward/reverse and increase / decrease the volume.

In Smart MP3 mode you can load MP3 files on the MOD-MP3-X SD-card if you connect with USB to computer, or you can send commands via RS232.

To play file with Duinomite is very simple you just have to send to MOD-MP3-X via RS232 this message: “PSONGNAME FILE.MP3” and to stop it you should send “C”

MOD-MP3-X responds to the commands and you can play with the different commands using this simple BASIC code:

10 OPEN “COM3:9600” AS #1 ‘open UEXT RS232 port
20 INPUT “CMD: “,CMD$ ‘ask for command
30 PRINT #1, CMD$+CHR$(13); ‘send to MOD-MP3-X + CR
35 PAUSE 300 ‘wait the command to be executed
40 IF EOF(1) THEN 20 ‘if there is response from the MOD-MP3
50 PRINT INPUT$(1,1); ‘read and print it
60 GOTO 40 ‘loop forever

with this code you can check all commands which are written in MOD-MP3-X user manual and see what they do.

OK then let’s write small code which plays the song “DUHAST.MP3” from my SD card when I press DuinoMite-Mini user Button, then to stop the song when the button is pressed again .

the code is:

10 OPEN “COM3:9600” AS #1 ‘open UEXT RS232 port
20 PRINT “PRESS THE USER BUTTON TO PLAY DUHAST.MP3”
30 DO: PAUSE 100: LOOP UNTIL PIN(0)=1 ‘wait button to be pressed
40 PRINT #1, “PSONGNAME DUHAST.MP3” ‘start playing the song
50 PAUSE 1000 ‘wait 1 second
60 PRINT “PRESS THE USER BUTTON AGAIN TO STOP THE SONG”
70 DO: PAUSE 100: LOOP UNTIL PIN(0)=1 ‘wait button to be pressed
80 PRINT #1, “C” ‘stop playing the song
90 CLOSE #1

Here is link to video which show how this program runs: http://youtu.be/kW_vReFMhkU