Revision 0:813ee8141cdd, committed 2015-09-03

Comitter:

gagarcr

Date:

Thu Sep 03 08:15:34 2015 +0000

Commit message:

Intial version based on SoftPWM

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SoftPwmOut.cpp	Thu Sep 03 08:15:34 2015 +0000
@@ -0,0 +1,83 @@
+#include "mbed.h"
+#include "InterruptIn.h"
+#include "SoftPwmOut.h"
+
+SoftPwmOut::SoftPwmOut(PinName pin) : _outPin(pin) // Constructor definition. Assign _out
+{
+    _interval = 0.1; // Default fequency
+    _width = 0;
+    start(); 
+}
+
+float SoftPwmOut::read()
+{
+    return _width / _interval;    
+}
+
+void SoftPwmOut::write(float duty)
+{
+    _width = _interval * duty;
+    if ( duty <= 0.0 ) _width =  0.0;
+    if ( duty > 1.0 )  _width =  _interval;
+}
+
+void SoftPwmOut::start()
+{
+    _ticker.attach(this,&SoftPwmOut::TickerInterrupt,_interval);
+}
+
+void SoftPwmOut::stop()
+{
+    _ticker.detach();
+    //wait(width);
+}
+
+void SoftPwmOut::period(float period)
+{
+    _interval = period;
+    start();
+}
+
+void SoftPwmOut::period_ms(int period)
+{
+    SoftPwmOut::period((float)period / 1000);
+    start();
+}
+
+void SoftPwmOut::period_us(int period)
+{
+    SoftPwmOut::period((float)period / 1000000);
+    start();
+}
+
+void SoftPwmOut::pulsewidth(float width)
+{
+   _width = width;
+   if ( _width < 0.0 ) _width = 0.0;
+   if ( _width > _interval) _width = _interval;
+}
+
+void SoftPwmOut::pulsewidth_ms(int width)
+{
+    SoftPwmOut::pulsewidth((float)width / 1000);
+}
+
+void SoftPwmOut::pulsewidth_us(int width)
+{
+    SoftPwmOut::pulsewidth((float)width / 1000000);
+}
+
+void SoftPwmOut::TickerInterrupt()
+{
+    _outPin = 0;
+    if ( _width <= 0 ) return;
+    _timeout.attach(this,&SoftPwmOut::end,_width);   
+}
+
+void SoftPwmOut::end()
+{  
+    _outPin = 1;
+//    _timeout.detach();
+}
+;
+

--- /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