Diff: spk_mRotaryEncoder.h

Revision:

0:87aab40d5806

Child:

8:d46cc49f0f37

diff -r 000000000000 -r 87aab40d5806 spk_mRotaryEncoder.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/spk_mRotaryEncoder.h	Sat Mar 10 19:26:44 2012 +0000
@@ -0,0 +1,63 @@
+// *SPARK D-FUSER
+// A project by *spark audio-visual
+//
+// spkRotaryEncoder extends mRotaryEncoder to return the change on pot state since last queried
+// This allows the encoder to be polled when the host program is ready, and return info suitable for driving a TVOne style menu
+// Importantly to driving such a menu, it will ignore any further rotation after the switch is pressed.
+
+#include "mRotaryEncoder.h"
+
+class SPKRotaryEncoder : public mRotaryEncoder {
+
+public:
+    bool    hasPressed();
+    int     getChange();
+    int     getPos(); // This would be a Get() override, but its not virtual. We use this instead to correct for positions-per-detent
+    SPKRotaryEncoder(PinName pinA, PinName pinB, PinName pinSW, PinMode pullMode=PullUp, int debounceTime_us=1000);
+
+private:
+    void    onPress();
+    bool    m_hasPressed;
+    int     m_positionOld;
+    int     m_positionOnPress;
+
+};
+
+SPKRotaryEncoder::SPKRotaryEncoder(PinName pinA, PinName pinB, PinName pinSW, PinMode pullMode, int debounceTime_us) : mRotaryEncoder(pinA, pinB, pinSW, pullMode, debounceTime_us)
+{
+    attachSW(this,&SPKRotaryEncoder::onPress);
+}
+
+bool SPKRotaryEncoder::hasPressed()
+{
+    bool hasPressed = m_hasPressed;
+    m_hasPressed = false;
+    
+    return hasPressed;
+}
+
+int SPKRotaryEncoder::getChange()
+{
+    int positionEnc = this->getPos();
+        
+    int positionToUse = m_hasPressed ? m_positionOnPress : positionEnc;
+    int change = positionToUse - m_positionOld;
+    
+    m_positionOld = positionEnc;
+
+    return change;
+}
+
+int SPKRotaryEncoder::getPos()
+{
+    int positionEnc = this->Get();
+    int positionsPerDetent = 2;
+    
+    return positionEnc / positionsPerDetent;
+}
+
+void SPKRotaryEncoder::onPress()
+{
+    m_positionOnPress = this->getPos();
+    m_hasPressed = true;
+}
\ No newline at end of file