Diff: hardwareIO/CRotaryEncoder.cpp

Revision:

0:df6fdd9b99f0

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hardwareIO/CRotaryEncoder.cpp	Tue Dec 02 04:39:15 2014 +0000
@@ -0,0 +1,89 @@
+#include "mbed.h"
+#include "CRotaryEncoder.h"
+
+
+CRotaryEncoder rotaryEncoder1=CRotaryEncoder(ROTARY_ENCODER1_PINA, ROTARY_ENCODER1_PINB);//pre-instanciation of object lockin with inter-file scope (declared extern in .h file)
+CRotaryEncoder rotaryEncoder2=CRotaryEncoder(ROTARY_ENCODER2_PINA, ROTARY_ENCODER2_PINB);//pre-instanciation of object lockin with inter-file scope (declared extern in .h file)
+
+CRotaryEncoder::CRotaryEncoder(PinName pinA, PinName pinB)
+{
+    m_pinA = new InterruptIn(pinA);
+    m_pinA->mode(PullUp); // this is for use in the case of the simple contact based rotary encoder (common is tied to ground)
+    m_pinA->rise(this, &CRotaryEncoder::rise);
+    m_pinA->fall(this, &CRotaryEncoder::fall);
+
+    m_pinB = new DigitalIn(pinB);
+    m_pinB->mode(PullUp); 
+    m_position = 0;
+    
+    newValue=true;
+    minValue=0; maxValue=360;
+}
+
+CRotaryEncoder::~CRotaryEncoder()
+{
+    delete m_pinA;
+    delete m_pinB;
+}
+ 
+ void CRotaryEncoder::SetMinMax(int min, int max) {
+     minValue=min;
+     maxValue=max;
+     }
+ 
+int CRotaryEncoder::Get(void)
+{
+    return m_position;
+}
+
+void CRotaryEncoder::Set(int value)
+{
+    if (value>maxValue) m_position = maxValue;
+    if (value<minValue) m_position = minValue;
+    m_position = value;
+}
+
+bool CRotaryEncoder::CheckNew()
+{
+    bool auxValue=newValue;
+    newValue=0;
+    return(auxValue);
+}
+
+void CRotaryEncoder::wrapValue() {
+    if (m_position>maxValue) m_position = minValue;
+    if (m_position<minValue) m_position = maxValue;
+    }
+
+void CRotaryEncoder::fall(void)
+{
+        if(*m_pinB == 1)
+        {
+            m_position++;
+        }
+        else
+        {
+            m_position--;
+        }
+        
+        wrapValue();
+        
+        newValue=true;
+}
+
+void CRotaryEncoder::rise(void)
+{
+        if(*m_pinB == 1)
+        {
+            m_position--;
+        }
+        else
+        {
+            m_position++;
+        }
+        
+        wrapValue(); 
+        
+        newValue=true;
+}
+