jim hamblen / Mbed 2 deprecated speaker_demo_PWM

Demo for new class to play a note on a speaker using a PWM output See http://mbed.org/users/4180_1/notebook/using-a-speaker-for-audio-output/

Dependencies:   mbed

main.cpp@0:b2fdf3770282, 2013-01-20 (annotated)

Committer:
4180_1
Date:
Sun Jan 20 03:02:37 2013 +0000
Revision:
0:b2fdf3770282
Child:
1:2e6ea42675c7
Child:
2:68eee0fb2026
ver 1.0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
4180_1 0:b2fdf3770282 1 #include "mbed.h"
4180_1 0:b2fdf3770282 2 #include "Speaker.h"
4180_1 0:b2fdf3770282 3
4180_1 0:b2fdf3770282 4 // Speaker test program - euro police style siren now using new Speaker class method
4180_1 0:b2fdf3770282 5 // for documentation see http://mbed.org/users/4180_1/notebook/using-a-speaker-for-audio-output/
4180_1 0:b2fdf3770282 6 // can also be used to play a song, if you have the notes and durations
4180_1 0:b2fdf3770282 7 // for musical note frequencies see http://en.wikipedia.org/wiki/Piano_key_frequencies
4180_1 0:b2fdf3770282 8
4180_1 0:b2fdf3770282 9 int main()
4180_1 0:b2fdf3770282 10 {
4180_1 0:b2fdf3770282 11 // setup instance of new Speaker class, mySpeaker using pin 21
4180_1 0:b2fdf3770282 12 // the pin must be a PWM output pin
4180_1 0:b2fdf3770282 13 Speaker mySpeaker(p21);
4180_1 0:b2fdf3770282 14 // loops forever playing two notes on speaker
4180_1 0:b2fdf3770282 15 while(1) {
4180_1 0:b2fdf3770282 16 mySpeaker.PlayNote(969.0,0.5,0.5);
4180_1 0:b2fdf3770282 17 mySpeaker.PlayNote(800.0,0.5,0.5);
4180_1 0:b2fdf3770282 18 }
4180_1 0:b2fdf3770282 19 }