Diff: GeneralDebouncer.h

Revision:

0:22a56daa5d4f

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/GeneralDebouncer.h	Mon Feb 24 01:25:52 2014 +0000
@@ -0,0 +1,65 @@
+#pragma once
+
+#include <mbed.h>
+
+class GeneralDebouncer
+{
+    public:
+    GeneralDebouncer(int32_t maxUpdateIntervalMicroseconds)
+      : maxUpdateIntervalMicroseconds(maxUpdateIntervalMicroseconds)
+    {
+        timer.start();
+        //this->maxUpdateIntervalMicroseconds = maxUpdateIntervalMicroseconds;
+        reset();
+    }
+    
+    void reset()
+    {
+        firstReportReceived = false;
+        lastReportTimeMicroseconds = 0;
+        spanBeginTimeMicroseconds = 0;
+        currentState = 0;
+    }
+
+    uint32_t getState()
+    {
+        return currentState;   
+    }
+
+    uint32_t getTimeInCurrentStateMicroseconds()
+    {
+        //if ((time() - lastReportTimeMicroseconds) > maxUpdateIntervalMicroseconds)
+        //{
+        //    return 0;
+        //}        
+        return time() - spanBeginTimeMicroseconds;
+    }
+
+    void update(uint32_t state)
+    {
+        uint32_t time = this->time();
+        // || (time - lastReportTimeMicroseconds) > maxUpdateIntervalMicroseconds
+        if (!firstReportReceived  || state != currentState)
+        {
+            firstReportReceived = true;
+            spanBeginTimeMicroseconds = time;
+            currentState = state;
+        }        
+        lastReportTimeMicroseconds =  time;
+    }
+    
+    private:
+    uint32_t time()
+    {
+        return (uint32_t)timer.read_us();  // Cast int32_t to uint32_t.
+    }
+    
+    private:
+    public: // tmphax
+    bool firstReportReceived;
+    uint32_t const maxUpdateIntervalMicroseconds;
+    uint32_t lastReportTimeMicroseconds;
+    uint32_t spanBeginTimeMicroseconds;
+    uint32_t currentState;
+    Timer timer;
+};
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