Diff: HK_CDMS.cpp

Revision:

7:4f17f1afe95e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/HK_CDMS.cpp	Tue Jun 16 20:14:03 2015 +0000
@@ -0,0 +1,105 @@
+#include "HK_CDMS.h"
+#include "pin_config.h"
+ 
+ 
+Serial hk_cdms(USBTX, USBRX);
+//DigitalOut Select_Lines_C[]={PIN85,PIN84,PIN39,PIN38};  //to mux on IF board,from LSB(Select_Lines_C[3]) to MSB(Select_Lines_C[0])
+DigitalOut Select_Lines_C[]={D7,D6,D5,D4};
+AnalogIn Temperature_voltage_Input(PIN53);  //output from IF mux
+//AnalogIn Sensor_Input(PIN53);    //output from temperature sensor on CDMS
+char CDMS_HK_DATA[8];
+ 
+void FCTN_CDMS_HK_INIT()
+{
+    Select_Lines_C[0] = Select_Lines_C[1] = Select_Lines_C[2] = Select_Lines_C[3] = 0;  //initialisation of variables
+}
+ 
+int quantiz(float l_start,float l_step,float l_x)       // accepts min and measured values and step->quantises on a scale 0-15..(4 bit quantisation)
+{
+    int l_y = (l_x - l_start)/l_step;
+        
+    if(l_y <= 0)
+            l_y = 0;
+            
+    if(l_y >= 15)
+            l_y = 15;
+            
+    return l_y;
+} 
+ 
+Sensor_Data Sensor; 
+Sensor_Data_Quantised Sensor_Quantised;
+ 
+char* FCTN_CDMS_HK_MAIN()
+{
+    float l_resistance_thermistor;  //declaration of variables
+    float l_voltage_thermistor;
+    float l_Payload_voltage;
+    int l_Loop_Iterator = 0;
+    int l_Select_Line_Iterator = 3;
+ 
+    for(l_Loop_Iterator = 0; l_Loop_Iterator < 16; l_Loop_Iterator++)
+    {
+ 
+        l_voltage_thermistor = Temperature_voltage_Input.read()*3.3;       //voltage across thermistor
+        l_resistance_thermistor = 24000*l_voltage_thermistor/(3.3 - l_voltage_thermistor);           //resistance of thermistor
+        l_Payload_voltage = Temperature_voltage_Input.read()*3.3;
+               
+        Sensor.l_Temperature_thermistor[(l_Loop_Iterator)] = 0.00000004*l_resistance_thermistor*l_resistance_thermistor - 0.0039*l_resistance_thermistor + 347.97;
+        Sensor.l_Temperature_sensor[l_Loop_Iterator] = (-90.7*3.3*Temperature_voltage_Input.read() + 190.1543);  
+              
+        if(l_Loop_Iterator % 2 == 0) 
+        {
+             if(l_Loop_Iterator < 4)
+             Sensor_Quantised.l_Temperature_thermistor[(l_Loop_Iterator)/2] = quantiz(tstart_thermistor,tstep_thermistor,Sensor.l_Temperature_thermistor[(l_Loop_Iterator)]);
+               
+             else  
+             {
+                if(4 < l_Loop_Iterator < 14)
+                Sensor_Quantised.l_Payload_voltage[(l_Loop_Iterator)/2] = Sensor_Quantised.l_Payload_voltage[(l_Loop_Iterator)/2] <<4 + quantiz(tstart,tstep,Sensor.l_Payload_voltage[l_Loop_Iterator]); 
+                
+                else
+                Sensor_Quantised.l_Temperature_sensor[(l_Loop_Iterator)/2] = quantiz(tstart,tstep,Sensor.l_Temperature_sensor[l_Loop_Iterator]); 
+             }
+        }
+                                              
+        else
+        {
+            
+            if(l_Loop_Iterator < 4)
+            Sensor_Quantised.l_Temperature_thermistor[(l_Loop_Iterator)/2] = Sensor_Quantised.l_Temperature_thermistor[(l_Loop_Iterator)/2] <<4 + quantiz(tstart_thermistor,tstep_thermistor,Sensor.l_Temperature_thermistor[l_Loop_Iterator]);
+            
+            else
+            {
+                if(4 < l_Loop_Iterator < 14)
+                Sensor_Quantised.l_Payload_voltage[(l_Loop_Iterator)/2] = quantiz(tstart,tstep,Sensor.l_Payload_voltage[l_Loop_Iterator]);
+                
+                else
+                Sensor_Quantised.l_Temperature_sensor[(l_Loop_Iterator)/2] = Sensor_Quantised.l_Temperature_sensor[(l_Loop_Iterator)/2] <<4 + quantiz(tstart,tstep,Sensor.l_Temperature_sensor[l_Loop_Iterator]); 
+        
+            }
+        }
+    
+       
+          
+       // The following lines are used to iterate the select lines from 0 to 15
+       for(l_Select_Line_Iterator = 3;l_Select_Line_Iterator >= 0;l_Select_Line_Iterator--)
+       {
+            if(Select_Lines_C[l_Select_Line_Iterator] == 0)
+            {
+                Select_Lines_C[l_Select_Line_Iterator] = 1;
+                break;
+            }
+            else Select_Lines_C[l_Select_Line_Iterator] = 0;
+            printf("%d\n",l_Select_Line_Iterator);
+       }
+      
+        wait_us(10.0); //  A delay of 10 microseconds between each sensor output. Can be changed.
+    }
+     printf("vol %f temp %f",Temperature_voltage_Input.read()*3.3,-90.7*3.3*Temperature_voltage_Input.read() + 190.1543 );
+     printf("CDMS_HK Data is Temperature_sensor=%s, l_Temperature_thermistor=%s, Payload_voltage=%s ",Sensor_Quantised.l_Temperature_sensor,Sensor_Quantised.l_Temperature_thermistor,Sensor_Quantised.l_Payload_voltage);
+     strcpy (CDMS_HK_DATA,Sensor_Quantised.l_Temperature_sensor);
+     strcat (CDMS_HK_DATA,Sensor_Quantised.l_Temperature_thermistor);
+     strcat (CDMS_HK_DATA,Sensor_Quantised.l_Payload_voltage);
+     return(CDMS_HK_DATA);
+}
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