Diff: lib/LinearFunction.cpp

Revision:

0:e83b840a5f86

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/LinearFunction.cpp	Tue Sep 18 03:11:01 2018 +0000
@@ -0,0 +1,50 @@
+#include "LinearFunction.h"
+
+LinearFunction::LinearFunction(unsigned int op_period_ms):
+    _op_period(((op_period_ms > 0) ?(op_period_ms < LF_MAX_TIME) ?op_period_ms :LF_MAX_TIME :1) / 1000.0)
+{
+    _ticker.attach(this, &LinearFunction::_on_operate, _op_period);    
+}
+
+void LinearFunction::set(const double val, const double intercept, const unsigned int ct_ms)
+{
+    
+    if(_range !=  val - intercept){
+        reset();
+        _range = val - intercept;
+    }
+    
+    _intercept = intercept;
+    
+    _timer.start();    
+    _ct_s = ((ct_ms > 0) ?(ct_ms > _op_period * LF_MAX_TIME) ?ct_ms :_op_period * LF_MAX_TIME :1) / 1000.0;    
+}
+
+void LinearFunction::reset()
+{
+    _ct_s = 0;
+    _range = 0;
+    _intercept = 0;
+    _current_val = 0;
+    _timer.reset();
+    _timer.stop();
+}
+
+double LinearFunction::get_val()
+{
+    return _current_val + _intercept;
+}
+
+void LinearFunction::_on_operate()
+{
+    
+    if(_ct_s <= _timer.read_ms() / 1000.0){
+        _current_val = _range;
+        _timer.stop();
+        if(_current_val != _range)
+            _timer.reset();
+    }else{
+        _current_val = (_range / _ct_s) * (_timer.read_ms() / 1000.0);
+    }
+    
+}
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