Diff: GasUseCounter.h

Revision:

5:5bccf48799d4

Child:

19:0367cb46d003

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/GasUseCounter.h	Tue Feb 17 21:33:39 2015 +0000
@@ -0,0 +1,69 @@
+#ifndef __GASUSECOUNTER__H
+#define __GASUSECOUNTER__H
+#include "mbed.h"
+#include "PulsePin.h"
+#include "SDFileSystem.h"
+#include <RawSerial.h>
+
+const int MAX_GAS_COUNT_STR_LEN = 50;
+const int MAX_PULSES_BEFORE_STORE_NV = 1; // Store at each pulse
+
+class GasUseCounter
+{
+    public:
+        // Constructor
+        GasUseCounter(const char* gasUseFilename, DigitalIn& gasPulsePin, RawSerial &pc) :
+                _gasPulsePin(gasPulsePin), _pc(pc)
+        {
+            _gasUseFilename = gasUseFilename;
+            _lastWrittenGasCount = 0;
+            _pulseDetector = new PulsePin(_gasPulsePin, false, 200);
+        }
+        
+        // Init (get count from NV)
+        void Init();
+        
+        // Callback from web server to handle getting current gas count
+        char* getGasUseCallback(char* cmdStr, char* argStr);
+
+        // Service function to detect pulses
+        bool Service();
+        
+        // Read/Write current gas count
+        void GetGasCountFromSD();
+        void WriteGasCountToSD();
+        
+        // Get Count
+        int GetCount()
+        {
+            return _pulseDetector->GetPulseCount();
+        }
+        
+        // Set Count
+        void SetCount(int gasUseCount)
+        {
+            _pulseDetector->SetPulseCount(gasUseCount);
+            WriteGasCountToSD();
+        }
+        
+        // Get inter-pulse time
+        int GetPulseRateMs()
+        {
+            return _pulseDetector->GetPulseRateMs();
+        }
+        
+    private:
+        // Gas use filename for non-volatile
+        const char* _gasUseFilename;
+        int _curGasCount;
+        int _lastWrittenGasCount;
+        char _gasCountStr [MAX_GAS_COUNT_STR_LEN];
+        DigitalIn& _gasPulsePin;
+        PulsePin* _pulseDetector;
+        RawSerial& _pc;
+};
+
+
+
+
+#endif