Output PWM on any pin. Partly based on SoftPWM with some improvements
Diff: SoftPwmOut.h
- Revision:
- 0:813ee8141cdd
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/SoftPwmOut.h Thu Sep 03 08:15:34 2015 +0000 @@ -0,0 +1,45 @@ +#ifndef SoftPWM_H +#define SoftPWM_H +#define POSITIVE true +#define NEGATIVE false + +#include "mbed.h" + +class SoftPwmOut +{ +public: + SoftPwmOut(PinName); +// void attach_us(int); + void start(); + void write(float); + float read(); + void pulsewidth(float); + void pulsewidth_ms(int); + void pulsewidth_us(int); + void period(float); + void period_ms(int); + void period_us(int); + void stop(); + operator float() { + if ( _width <= 0.0 ) return 0.0; + if ( _width > 1.0 ) return 1.0; + return _width / _interval; + } + SoftPwmOut& operator=(float duty) { + _width = _interval * duty; + if ( duty <= 0.0 ) _width = 0.0; + if ( duty > 1.0 ) _width = _interval; + return *this; + } + +private: + Timeout _timeout; + Ticker _ticker; + void TickerInterrupt(); + void end(); + DigitalOut _outPin; + float _width; + float _interval; + +}; +#endif \ No newline at end of file