A wave player demo setup for the mbed application board. Reads a wave file from a USB flash drive, and outputs to the onboard speaker (very low volume) and the analog audio out jack that can be connected to a set of PC speakers for more volume. A wave file for the demo is available at http://mbed.org/media/uploads/4180_1/sample.wav. Copy it to the USB drive. See http://mbed.org/users/4180_1/notebook/application-board-waveplayer-demo/ for more details and instructions.
Dependencies: USBHost mbed wave_player_appbd
Fork of USBHostMSD_HelloWorld by
main.cpp
- Committer:
- 4180_1
- Date:
- 2013-11-01
- Revision:
- 9:f1aebfbe7e78
- Parent:
- 4:f8a5c8aa895a
File content as of revision 9:f1aebfbe7e78:
#include "mbed.h" #include "USBHostMSD.h" #include "wave_player.h" //mbed Application board waveplayer demo //Plays the wave file "sample.wav" on the USB flash drive //Outputs to onboard speaker (but at very low volume) //and the Audio Out jack for connection to a set of amplified PC speakers (at higher volume) //Needs a USB flash drive inserted with the wav file on it to run //Analog Out Jack AnalogOut DACout(p18); //On Board Speaker PwmOut PWMout(p26); wave_player waver(&DACout,&PWMout); int main() { USBHostMSD msd("usb"); FILE *wave_file; //setup PWM hardware for a Class D style audio output PWMout.period(1.0/400000.0); printf("\n\n\nHello, wave world!\n"); // wait until connected to a USB device while(!msd.connect()) { Thread::wait(500); } //open wav file and play it wave_file=fopen("/usb/sample.wav","r"); waver.play(wave_file); fclose(wave_file); //end of program while(1) {}; }