Music Player

Objective The course will show you how to control Microduino modules to achieve a music player by using Processing. Equipment Microduino-Core Microduino-FT232R Microduino-SD Microduino-LM4863 Other Hardware Equipment A USB cable A loudspeaker A storage card Schematic Just stack the four Microduino modules mentioned above and connect the two wires of the loudspeaker to Microduino-LM4863 Program https://github.com/Microduino/Microduino_Tutorials/tree/master/Microduino_Processing/MicroduinoMusicplayer https://github.com/Microduino/Microduino_Tutorials/tree/master/Microduino_Processing/ProcessingMusicplayer Debugging Step 1: The hardware building of the circuit can refer to: http://www.microduino.cc/wiki/index.php?title=Microduino_LM4863%E9%9F%B3%E4%B9%90%E6%92%AD%E6%94%BE%E5%99%A8-301KIT/zh Insert the storage card into the slot of Microduino SD 301KIT-SD Connect the loudspeaker 301KIT-Speak Build the hardware environment according to the schematic, just like this: Step 2: Audio Production A SoX-based tool will be needed. And you can choose a proper conversion program according to the operational frequency of you Microduino modules. Extract the file to "Microduino with 16 MHz" folder and put the audio file into the folder, then select "FullRate@16MHz_Mono.bat"

Audio

A dialog box will pop up, showing "Press any key to continue..."

Audio

After that, there appears a newly created folder and you will find the converted file inside. If failed, you can convert the audio file to "wav" format and have another try.

Audio

Copy the converted audio file to the storage card and insert the card into Microduino SD card slot. Use IED to open the test program offered by Microduino and choose Microduino Core (Atmega328P@16M,5V). Here the things should be noticed before program download: Since some libraries may have different pin definition, please download the changed libraries and replace the former ones; The name of the audio file should also be changed to that of the generated audio file. Step 3：Here the code needed: The code of two ends (Processing and Microduino) Microduino: //The code keeps consistent with that of the 301 kit of Microduino-LM4863 music player. The difference is the added function of receiving serial data if(Serial.available()) { command=Serial.read(); Serial.println(command); SdPlay.worker(); if(num_two!=num_one) { num_two=num_one ; if(command=='p') {//'p' means play SdPlay.play(); Serial.println(F("Play.")); } else if(command=='t') {//'t' means stop SdPlay.pause(); Serial.println(F("Pause.")); } Serial.println(ok); Serial.print(num_one); Serial.println(num_two); } } Processing: //Get the data of the first serial port. println(Serial.list()); // is always my Arduino, so I open Serial.list()[0]. // Open whatever port is the one you're using. port = new Serial(this, Serial.list()[0], 9600); //Add background-image, judge the mouse click, send play or pause instructions to Microduino to control the music player void draw() { image(bg, 0, 0); if (button) { image(play, x, y); port.write("p"); } else { image(pause, x, y); port.write("t"); } } Step 4: Download the code and get it compiled successfully. Step 5: After the system goes well, a disk music player will appear on the screen. Click the button in the middle to see what happens. Result The music player starts or pauses along with the click of the button, just like this:. Video