Sarah Marsh / Mbed OS app-shield-speaker

Example program to do a frequency sweep on the speaker

Fork of app-shield-speaker by Chris Styles

main.cpp@5:aba9347842e0, 2017-09-19 (annotated)

Committer:
sarahmarshy
Date:
Tue Sep 19 19:29:12 2017 +0000
Revision:
5:aba9347842e0
Parent:
3:3bb3e6051175 
Update to mbed OS

Who changed what in which revision?

UserRevisionLine numberNew contents of line
chris 0:f86c572491c3 1 #include "mbed.h"
chris 0:f86c572491c3 2
chris 3:3bb3e6051175 3 DigitalIn fire(D4);
chris 3:3bb3e6051175 4 PwmOut spkr(D6);
chris 0:f86c572491c3 5
chris 0:f86c572491c3 6 int main()
chris 0:f86c572491c3 7 {
chris 2:cfd337edff08 8 while (1) {
chris 2:cfd337edff08 9 for (float i=2000.0; i<10000.0; i+=100) {
chris 2:cfd337edff08 10 spkr.period(1.0/i);
chris 2:cfd337edff08 11 spkr=0.5;
chris 3:3bb3e6051175 12 wait(0.02);
chris 2:cfd337edff08 13 }
chris 2:cfd337edff08 14 spkr=0.0;
chris 2:cfd337edff08 15 while(!fire) {}
chris 0:f86c572491c3 16 }
chris 0:f86c572491c3 17 }