jim hamblen / Mbed 2 deprecated speaker_demo_Analog

A class to play notes on a speaker using analog out See https://mbed.org/users/4180_1/notebook/using-a-speaker-for-audio-output/

Dependencies:   mbed

main.cpp@0:1c8118ee4106, 2013-01-21 (annotated)

Committer:
4180_1
Date:
Mon Jan 21 03:37:11 2013 +0000
Revision:
0:1c8118ee4106
ver 1.0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
4180_1 0:1c8118ee4106 1 #include "mbed.h"
4180_1 0:1c8118ee4106 2 // Audio output demo for speaker
4180_1 0:1c8118ee4106 3 // Speaker Class demo - plays a note on the analog output pin
4180_1 0:1c8118ee4106 4 // 32 data points on one sine wave cycle are precomputed,
4180_1 0:1c8118ee4106 5 // scaled, stored in an array and
4180_1 0:1c8118ee4106 6 // continuously output to the Digital to Analog convertor
4180_1 0:1c8118ee4106 7
4180_1 0:1c8118ee4106 8 // add Speaker class and PlayNote
4180_1 0:1c8118ee4106 9 // PlayNote args are frequency in hz (<=5000), duration in secs , and volume(0.0..1.0)
4180_1 0:1c8118ee4106 10 #include "Speaker.h"
4180_1 0:1c8118ee4106 11
4180_1 0:1c8118ee4106 12 int main()
4180_1 0:1c8118ee4106 13 {
4180_1 0:1c8118ee4106 14 // setup instance of new Speaker class, mySpeaker
4180_1 0:1c8118ee4106 15 // the pin must be the AnalogOut pin - p18
4180_1 0:1c8118ee4106 16 Speaker mySpeaker(p18);
4180_1 0:1c8118ee4106 17 // loops forever playing two notes on speaker using analog samples
4180_1 0:1c8118ee4106 18 while(1) {
4180_1 0:1c8118ee4106 19 mySpeaker.PlayNote(969.0, 0.5, 1.0);
4180_1 0:1c8118ee4106 20 mySpeaker.PlayNote(800.0, 0.5, 1.0);
4180_1 0:1c8118ee4106 21 }
4180_1 0:1c8118ee4106 22 }