adrobo / adrobo

This library is used for student's experiment. Chiba Institute of Technology

Dependencies:   QEI SoftwarePWM

Fork of adrobo by yasuo hayashibara

Sound.cpp@1:45772cb4e01c, 2020-04-20 (annotated)

Committer:
yasuohayashibara
Date:
Mon Apr 20 04:07:37 2020 +0000
Revision:
1:45772cb4e01c
Parent:
0:4508c5b68135 
add required libraries

Who changed what in which revision?

UserRevisionLine numberNew contents of line
yasuohayashibara 0:4508c5b68135 1 #include "Sound.h"
yasuohayashibara 0:4508c5b68135 2
yasuohayashibara 0:4508c5b68135 3 Sound::Sound(PinName pin)
yasuohayashibara 0:4508c5b68135 4 : pwm(pin)
yasuohayashibara 0:4508c5b68135 5 {
yasuohayashibara 0:4508c5b68135 6 this->write(0);
yasuohayashibara 0:4508c5b68135 7 pwm.Enable(0, 1000000);
yasuohayashibara 0:4508c5b68135 8 }
yasuohayashibara 0:4508c5b68135 9
yasuohayashibara 0:4508c5b68135 10 void Sound::write(float frequency)
yasuohayashibara 0:4508c5b68135 11 {
yasuohayashibara 0:4508c5b68135 12 frequency_ = frequency;
yasuohayashibara 0:4508c5b68135 13 if (frequency_ != 0){
yasuohayashibara 0:4508c5b68135 14 int us = (int)(1000000.0f / frequency_);
yasuohayashibara 0:4508c5b68135 15 pwm.Disable();
yasuohayashibara 0:4508c5b68135 16 pwm.Enable(us/2, us);
yasuohayashibara 0:4508c5b68135 17 } else {
yasuohayashibara 0:4508c5b68135 18 pwm.Disable();
yasuohayashibara 0:4508c5b68135 19 }
yasuohayashibara 0:4508c5b68135 20 }
yasuohayashibara 0:4508c5b68135 21
yasuohayashibara 0:4508c5b68135 22 float Sound::read()
yasuohayashibara 0:4508c5b68135 23 {
yasuohayashibara 0:4508c5b68135 24 return frequency_;
yasuohayashibara 0:4508c5b68135 25 }