Bob Merrison-Hort / Mbed 2 deprecated elec350

elec350

Dependencies:   mbed

Fork of elec350 by Bob Merrison-Hort

soft_pwm.cpp@10:021f19a9861f, 2015-10-21 (annotated)

Committer:
rmerrisonhort
Date:
Wed Oct 21 19:52:30 2015 +0000
Revision:
10:021f19a9861f
Child:
11:4685f33a2468
Added SoftPwm class.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rmerrisonhort 10:021f19a9861f 1 #include "soft_pwm.h"
rmerrisonhort 10:021f19a9861f 2
rmerrisonhort 10:021f19a9861f 3 SoftPwm::SoftPwm(float initialPeriod, float initialDutyCycle)
rmerrisonhort 10:021f19a9861f 4 {
rmerrisonhort 10:021f19a9861f 5 this->period = initialPeriod;
rmerrisonhort 10:021f19a9861f 6 this->dutyCycle = initialDutyCycle;
rmerrisonhort 10:021f19a9861f 7 this->timer.start();
rmerrisonhort 10:021f19a9861f 8 }
rmerrisonhort 10:021f19a9861f 9
rmerrisonhort 10:021f19a9861f 10 void SoftPwm::setPeriod(float newPeriod)
rmerrisonhort 10:021f19a9861f 11 {
rmerrisonhort 10:021f19a9861f 12 this->period = newPeriod;
rmerrisonhort 10:021f19a9861f 13 }
rmerrisonhort 10:021f19a9861f 14
rmerrisonhort 10:021f19a9861f 15 void SoftPwm::setDutyCycle(float newDutyCycle)
rmerrisonhort 10:021f19a9861f 16 {
rmerrisonhort 10:021f19a9861f 17 this->dutyCycle = newDutyCycle;
rmerrisonhort 10:021f19a9861f 18 }
rmerrisonhort 10:021f19a9861f 19
rmerrisonhort 10:021f19a9861f 20 bool SoftPwm::isOn()
rmerrisonhort 10:021f19a9861f 21 {
rmerrisonhort 10:021f19a9861f 22 float phase = this->timer.read() / this->period;
rmerrisonhort 10:021f19a9861f 23 if (phase > 1) {
rmerrisonhort 10:021f19a9861f 24 this->timer.reset();
rmerrisonhort 10:021f19a9861f 25 }
rmerrisonhort 10:021f19a9861f 26 if (phase < this->dutyCycle) {
rmerrisonhort 10:021f19a9861f 27 return true;
rmerrisonhort 10:021f19a9861f 28 } else {
rmerrisonhort 10:021f19a9861f 29 return false;
rmerrisonhort 10:021f19a9861f 30 }
rmerrisonhort 10:021f19a9861f 31 }
rmerrisonhort 10:021f19a9861f 32