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4180Lab2Part10
Fork of speaker_demo_PWM by
Diff: main.cpp
- Revision:
- 1:2e6ea42675c7
- Parent:
- 0:b2fdf3770282
--- a/main.cpp Sun Jan 20 03:02:37 2013 +0000 +++ b/main.cpp Tue Oct 21 03:00:15 2014 +0000 @@ -1,19 +1,32 @@ #include "mbed.h" -#include "Speaker.h" +#include "SongPlayer.h" -// Speaker test program - euro police style siren now using new Speaker class method +// Song test program - plays a song using PWM and timer interrupts // for documentation see http://mbed.org/users/4180_1/notebook/using-a-speaker-for-audio-output/ -// can also be used to play a song, if you have the notes and durations +// can be used to play a song, if you have the notes and durations // for musical note frequencies see http://en.wikipedia.org/wiki/Piano_key_frequencies +//Set up notes and durations for sample song to play +// A 0.0 duration note at end terminates song play +float note[18]= {1568.0,1396.9,1244.5,1244.5,1396.9,1568.0,1568.0,1568.0,1396.9, + 1244.5,1396.9,1568.0,1396.9,1244.5,1174.7,1244.5,1244.5, 0.0 + }; +float duration[18]= {0.48,0.24,0.72,0.48,0.24,0.48,0.24,0.24,0.24, + 0.24,0.24,0.24,0.24,0.48,0.24,0.48,0.48, 0.0 + }; + +DigitalOut led1(LED1); int main() { -// setup instance of new Speaker class, mySpeaker using pin 21 +// setup instance of new SongPlayer class, mySpeaker using pin 26 // the pin must be a PWM output pin - Speaker mySpeaker(p21); - // loops forever playing two notes on speaker + SongPlayer mySpeaker(p26); +// Start song and return once playing starts + mySpeaker.PlaySong(note,duration); + // loops forever while song continues to play to end using interrupts while(1) { - mySpeaker.PlayNote(969.0,0.5,0.5); - mySpeaker.PlayNote(800.0,0.5,0.5); + led1 = !led1; + wait(.1); } } +