main.cpp

00001 #include "mbed.h"
00002 #include "USBHostMSD.h"
00003 #include "wave_player.h"
00004 #include "rtos.h"
00005 
00006 //mbed Application board waveplayer demo
00007 //Plays the wave file "sample.wav" on the USB flash drive
00008 //Outputs to onboard speaker (but at very low volume)
00009 //and the Audio Out jack for connection to a set of amplified PC speakers (at higher volume)
00010 //Needs a USB flash drive inserted with the wav file on it to run
00011 
00012 //Analog Out Jack
00013 AnalogOut DACout(p18);
00014 //On Board Speaker
00015 PwmOut PWMout(p26);
00016 
00017 wave_player waver(&DACout,&PWMout);
00018 
00019 void playwav(void const *args) 
00020 {
00021     FILE *wave_file;
00022     wave_file=fopen((const char *)args,"r");
00023     waver.play(wave_file);
00024     fclose(wave_file);        
00025 }
00026 
00027 int main()
00028 {
00029     USBHostMSD msd("usb");
00030     //setup PWM hardware for a Class D style audio output
00031     PWMout.period(1.0/400000.0);
00032     printf("\n\n\nHello, wave world!\n");
00033     // wait until connected to a USB device
00034     while(!msd.connect()) {
00035         Thread::wait(500);
00036     }
00037     //open wav file and play it
00038     waver.stop = false;
00039     Thread thread(playwav,(void *)"/usb/wav3.wav");
00040     //end of program
00041     Thread::wait(10);
00042     waver.stop = true;
00043     while(1) {};
00044 }