1 files changed, 178 insertions, 0 deletions
diff --git a/Arduino/ems/Thermocouple.h b/Arduino/ems/Thermocouple.h
new file mode 100755
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+++ b/Arduino/ems/Thermocouple.h
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+/******************************************************************
+ * Thermocouple.h - type description for temperature measurement.
+ * 
+ * this should be generalized into a temperature sensor.
+ *
+ */
+
+ #ifndef THERMOCOUPLE_H
+ #define THERMOCOUPLE_H
+
+
+#include <SPI.h>
+#include "Adafruit_MAX31855.h"
+
+#include "Common.h"
+#include "TaskScheduler.h"
+#include "Monitor.h"
+#include "Machine.h"
+
+static double CtoF(double C) {
+  return (9.0*C)/5.0 + 32.0;
+}
+
+// output temperature values when they have changed
+static void readPlate1Temp();
+static void readPlate2Temp();
+static void readAmbientTemp();
+static void TS1 (uint8_t kwIndex, uint8_t verb,char *args); 
+static void TS2 (uint8_t kwIndex, uint8_t verb,char *args);
+static void AMT (uint8_t kwIndex, uint8_t verb,char *args);
+
+class Thermocouples {
+  private:
+    Adafruit_MAX31855 _therm1;
+    double _temp1;
+    bool _temp1changed;
+
+    Adafruit_MAX31855 _therm2;
+    double _temp2;
+    bool _temp2changed;
+
+    // ambient temp is made up of the avg ambient temp from each thermocouple
+    double _ambientTemp;
+    bool _ambChanged;
+    
+    Task _temp1Read;
+    Task _temp2Read;
+    Task _ambientTempRead;
+    
+  public:
+    Thermocouples() : _therm1(TS1_CS_PIN), _therm2(TS2_CS_PIN) {}
+    Adafruit_MAX31855* therm1()  {return &_therm1;}
+    Adafruit_MAX31855* therm2()  {return &_therm2;}
+
+    // temperature 1 changes
+    bool updateTemp1() {
+      double  tol = 1;
+      double temp = therm1()->readFarenheit();
+      _temp1changed = fabs(_temp1 - temp) >= tol;
+      if (_temp1changed)
+        _temp1 = temp;
+      return _temp1changed;
+    }
+
+    void setTemp1Changed(bool v) {
+      _temp1changed = v;
+    }
+
+    // temperature 2 changes
+    bool updateTemp2() {
+      double  tol = 1;
+      double temp = therm2()->readFarenheit();
+      _temp2changed = fabs(_temp2 - temp) >= tol;
+      if (_temp2changed)
+        _temp2 = temp;
+      return _temp2changed;
+    }
+
+    void setTemp2Changed(bool v) {
+        _temp2changed = v;
+    }
+
+    // Check for Ambient temperature changes
+    bool updateAmbientTemp() {
+      double tol = 1;
+      // Farenheit temperature
+      double avgTemp = CtoF((therm1()->readInternal() + therm2()->readInternal())/2.0);
+      _ambChanged = fabs(_ambientTemp - avgTemp) >= tol;
+      if (_ambChanged) {
+        _ambientTemp = avgTemp;
+      }
+      return _ambChanged;
+    }
+
+    void setAmbChanged(bool v) {
+      _ambChanged = v;
+    }
+    
+    double getTemp1() { return _temp1; }
+    double getTemp2() { return _temp2; }
+    double getAmb()   { return _ambientTemp; }
+    
+    bool updateTemp2(double temp);
+    
+    void init() {
+      monitor.registerAction(_TS1_, &TS1);
+      monitor.registerAction(_TS2_, &TS2);
+      monitor.registerAction(_AMT_, &AMT);
+
+      // set tasks for sceduled reads
+      _temp1Read.set(100L, TASK_FOREVER, &readPlate1Temp);
+      machine.todolist.addTask(_temp1Read);
+      _temp1Read.enable();
+      
+      _temp2Read.set(100L, TASK_FOREVER, &readPlate2Temp);
+      machine.todolist.addTask(_temp2Read);
+      _temp2Read.enable();
+      
+      _ambientTempRead.set(100L, TASK_FOREVER, &readAmbientTemp);
+      machine.todolist.addTask(_ambientTempRead);
+      _ambientTempRead.enable();
+    }
+
+    
+};
+
+extern Thermocouples thermocouple;
+
+/*----------------------------------------------------------------------
+ *  Schedule Callbacks
+ *--------------------------------------------------------------------*/
+// return the temp only if the plate temp has changed
+static void readPlate1Temp() { 
+    if (thermocouple.updateTemp1()) {
+        double _f = thermocouple.getTemp1();
+        monitor.update("TS1", "%d.%.02d", int(_f),int(abs(_f - int(_f))*100));
+        thermocouple.setTemp1Changed(false);
+    }
+}
+
+static void readPlate2Temp() { 
+    if (thermocouple.updateTemp2()) {
+        double _f = thermocouple.getTemp2();
+        monitor.update("TS2", "%d.%.02d", int(_f),int(abs(_f - int(_f))*100));
+        thermocouple.setTemp2Changed(false);
+    }
+}
+
+static void readAmbientTemp() {
+  if (thermocouple.updateAmbientTemp()) {
+        double _f = thermocouple.getAmb();
+        monitor.update("AMT", "%d.%.02d", int(_f),int(abs(_f - int(_f))*100));
+        thermocouple.setAmbChanged(false);
+  }
+}
+
+/*----------------------------------------------------------------------
+ *  Monitor Callbacks
+ *--------------------------------------------------------------------*/
+    
+// unconditionally return temp
+static void TS1 (uint8_t kwIndex, uint8_t verb,char *args) {
+    double _f = thermocouple.getTemp1();
+    monitor.update("TS1", "%d.%.02d", int(_f),int(abs(_f - int(_f))*100));
+}
+
+static void TS2 (uint8_t kwIndex, uint8_t verb,char *args) {
+    double _f = thermocouple.getTemp2();
+    monitor.update("TS2", "%d.%.02d", int(_f),int(abs(_f - int(_f))*100));
+}
+
+static void AMT (uint8_t kwIndex, uint8_t verb,char *args) {
+    double _f = thermocouple.getAmb();
+    monitor.update("AMT", "%d.%.02d", int(_f),int(abs(_f - int(_f))*100));
+}
+
+
+ #endif // THERMOCOUPLE_H