Oscar Schofield / Mbed 2 deprecated Elec350_OBS

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Dependencies:   mbed

soft_pwm.cpp@21:53c2a598dda1, 2015-12-01 (annotated)

Committer:
Oschofield
Date:
Tue Dec 01 13:18:49 2015 +0000
Revision:
21:53c2a598dda1
Parent:
16:e9e1b134f498 
added the App.h and app.cpp files to library;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Oschofield 16:e9e1b134f498 1 #include "soft_pwm.h"
Oschofield 16:e9e1b134f498 2
Oschofield 16:e9e1b134f498 3
Oschofield 16:e9e1b134f498 4
Oschofield 16:e9e1b134f498 5 SoftPwm::SoftPwm(float initalPeriod, float initialDutyCycle)
Oschofield 16:e9e1b134f498 6 {
Oschofield 16:e9e1b134f498 7 this->period = initalPeriod; //set initial Period
Oschofield 16:e9e1b134f498 8 this->dutyCycle = initialDutyCycle; //set initial Duty Cycle
Oschofield 16:e9e1b134f498 9 this->timer.start(); //PWM timer start
Oschofield 16:e9e1b134f498 10 }
Oschofield 16:e9e1b134f498 11
Oschofield 16:e9e1b134f498 12 float SoftPwm::getPeriod(){ //return current period value
Oschofield 16:e9e1b134f498 13 return this->period;
Oschofield 16:e9e1b134f498 14 }
Oschofield 16:e9e1b134f498 15
Oschofield 16:e9e1b134f498 16 float SoftPwm::getDutyCycle(){ //returns current Duty Cycle value
Oschofield 16:e9e1b134f498 17 return this->dutyCycle;
Oschofield 16:e9e1b134f498 18 }
Oschofield 16:e9e1b134f498 19
Oschofield 16:e9e1b134f498 20 void SoftPwm::setPeriod(float newPeriod){ //updates the period to a specified value
Oschofield 16:e9e1b134f498 21 this->period = newPeriod;
Oschofield 16:e9e1b134f498 22 return;
Oschofield 16:e9e1b134f498 23 }
Oschofield 16:e9e1b134f498 24
Oschofield 16:e9e1b134f498 25 void SoftPwm::setDutyCycle(float newDutyCycle){ //updates the Duty cycle to the specified value
Oschofield 16:e9e1b134f498 26 this->dutyCycle = newDutyCycle;
Oschofield 16:e9e1b134f498 27 }
Oschofield 16:e9e1b134f498 28
Oschofield 16:e9e1b134f498 29 bool SoftPwm::isOn(){
Oschofield 16:e9e1b134f498 30 float onPhaseDuration = this->dutyCycle * this->period;
Oschofield 16:e9e1b134f498 31
Oschofield 16:e9e1b134f498 32 float currentTime = this->timer.read();
Oschofield 16:e9e1b134f498 33
Oschofield 16:e9e1b134f498 34 if (currentTime > period) this->timer.reset();
Oschofield 16:e9e1b134f498 35
Oschofield 16:e9e1b134f498 36 if (currentTime < onPhaseDuration){
Oschofield 16:e9e1b134f498 37 return true;
Oschofield 16:e9e1b134f498 38 } else {
Oschofield 16:e9e1b134f498 39 return false;
Oschofield 16:e9e1b134f498 40 }
Oschofield 16:e9e1b134f498 41
Oschofield 16:e9e1b134f498 42 }