Mark Randall / PwmOutAny

This Library allows you to use any pin on the mbed micro as PWM out. It also allows the user to update the Period and Pulse width in realtime.

PwmOutAny.cpp@0:9eb94736e774, 2013-12-08 (annotated)

Committer:
mr63
Date:
Sun Dec 08 19:04:44 2013 +0000
Revision:
0:9eb94736e774
This Library allows you to use any pin on the mbed micro as PWM out.  It also allows the user to update the Period and Pulse width in realtime.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mr63 0:9eb94736e774 1 #include "PwmOutAny.h"
mr63 0:9eb94736e774 2
mr63 0:9eb94736e774 3 float _period;
mr63 0:9eb94736e774 4 float _PercentHigh;
mr63 0:9eb94736e774 5
mr63 0:9eb94736e774 6 PwmOutAny::PwmOutAny(PinName pin1, float Period, float PercentHigh):_PwmOut(pin1)
mr63 0:9eb94736e774 7 {
mr63 0:9eb94736e774 8 _period=Period;
mr63 0:9eb94736e774 9 _PercentHigh=PercentHigh ;
mr63 0:9eb94736e774 10 _PwmTicker.attach(this,&PwmOutAny::TickerFlipper,_period/2);
mr63 0:9eb94736e774 11 }
mr63 0:9eb94736e774 12
mr63 0:9eb94736e774 13 void PwmOutAny::TickerFlipper()
mr63 0:9eb94736e774 14 {
mr63 0:9eb94736e774 15 static float CurrentPeriod;
mr63 0:9eb94736e774 16 if(!_PwmOut)
mr63 0:9eb94736e774 17 {
mr63 0:9eb94736e774 18 _PwmTicker.detach();
mr63 0:9eb94736e774 19 _PwmTicker.attach(this,&PwmOutAny::TickerFlipper,CurrentPeriod*(_PercentHigh));
mr63 0:9eb94736e774 20 _PwmOut = true;
mr63 0:9eb94736e774 21 }
mr63 0:9eb94736e774 22 else
mr63 0:9eb94736e774 23 {
mr63 0:9eb94736e774 24 CurrentPeriod = _period;
mr63 0:9eb94736e774 25 _PwmTicker.detach();
mr63 0:9eb94736e774 26 _PwmTicker.attach(this,&PwmOutAny::TickerFlipper,CurrentPeriod*(1.0-_PercentHigh));
mr63 0:9eb94736e774 27 _PwmOut = false;
mr63 0:9eb94736e774 28 }
mr63 0:9eb94736e774 29 }
mr63 0:9eb94736e774 30
mr63 0:9eb94736e774 31
mr63 0:9eb94736e774 32 float PwmOutAny::Get_PulseWidth()
mr63 0:9eb94736e774 33 {
mr63 0:9eb94736e774 34 return (_PercentHigh);
mr63 0:9eb94736e774 35
mr63 0:9eb94736e774 36 }
mr63 0:9eb94736e774 37 void PwmOutAny::Set_PulseWidth(float PW)
mr63 0:9eb94736e774 38 {
mr63 0:9eb94736e774 39 _PercentHigh = PW;
mr63 0:9eb94736e774 40 }
mr63 0:9eb94736e774 41 float PwmOutAny::Get_Period()
mr63 0:9eb94736e774 42 {
mr63 0:9eb94736e774 43 return _period;
mr63 0:9eb94736e774 44 }
mr63 0:9eb94736e774 45 void PwmOutAny::Set_Period(float ChangePeriod)
mr63 0:9eb94736e774 46 {
mr63 0:9eb94736e774 47 _period = ChangePeriod;
mr63 0:9eb94736e774 48 }
mr63 0:9eb94736e774 49