Seeker of Truth ,
no honeycomb
Diff: HK.cpp
- Revision:
- 0:ebdf4f859dca
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/HK.cpp Fri Dec 19 06:47:25 2014 +0000
@@ -0,0 +1,226 @@
+#include "HK.h"
+#include "pin_config.h"
+
+
+//GPIO pins used=> D2-D12, A0-A1
+
+DigitalOut SelectLinesA[]={PIN96,PIN44,PIN45,PIN46};//to mux1=>voltage mux , PTA 13-16 , CHNGE TO PIN43 LATER
+DigitalOut SelectLinesB[]={PIN56,PIN57,PIN58,PIN59};//to mux2=>current mux(differential mux) , PTB 3,7,8,9
+DigitalOut SelectLinesC[]={PIN64,PIN65,PIN66,PIN67};//to mux3=>temp mux PTB 18-21
+
+//--------------------------------------------MSB is SelectLines[0],LSB is SelectLines[3]--------------------------------
+
+AnalogIn CurrentInput(PIN53); // Input from Current Mux PTB0
+AnalogIn VoltageInput(PIN54); // Input from Voltage Multiplexer PTB1
+AnalogIn TemperatureInput(PIN55); /*PTB2 Input from Temperature Multiplexer,thermistor Multiplexer- same multiplexer for both(lines 1-4 for thermistor,line 0 for temperature sensor)*/
+
+
+
+
+int quantiz(float start,float step,float x) // accepts min and measured values and step->quantises on a scale 0-15..(4 bit quantisation)
+{
+ int y=(x-start)/step;
+ if(y<=0)y=0;
+ if(y>=15)y=15;
+ return y;
+}
+
+void init_beacon(ShortBeacy* x,SensorDataQuantised y)
+{
+ (*x).Voltage[0]=2;//quantised value
+ (*x).Temp[0]=y.PanelTemperature[0];//quantised value
+ (*x).Temp[1]=y.PanelTemperature[1];//quantised value
+ (*x).AngularSpeed[0]=y.AngularSpeed[0];
+ (*x).AngularSpeed[1]=y.AngularSpeed[1];
+
+ (*x).SubsystemStatus[0]=145;//dummy values----------to be changed-------------------
+ (*x).ErrorFlag[0]=3;//dummy values----------to be changed-------------------
+}
+
+SensorData Sensor;
+SensorDataQuantised SensorQuantised;
+ShortBeacy Shortbeacon;
+void FUNC_HK_MAIN()
+{
+ //define structure variables
+
+
+
+
+ //initialise all selectlines to zeroes->1st line of muxes selected
+ SelectLinesA[0]=SelectLinesA[1]=SelectLinesA[2]=SelectLinesA[3]=0;
+ SelectLinesB[0]=SelectLinesB[1]=SelectLinesB[2]=0;
+ SelectLinesC[0]=SelectLinesC[1]=SelectLinesC[2]=SelectLinesC[3]=0;
+
+ int LoopIterator;
+ int SelectLineIterator;
+
+ float resistance_thermistor,voltage_thermistor;//for thermistor
+
+ //measurement from voltage sensor=> 16 sensors in place
+ for(LoopIterator=0; LoopIterator<16; LoopIterator++)
+{
+ //following lines read the sensor values and stores them in 'SensorData' structure's variable 'Sensor'
+ Sensor.Voltage[LoopIterator]=(VoltageInput.read()*3.3*5.545454);//resistors in voltage divider=>15Mohm,3.3Mohm
+
+ if(LoopIterator%2==0)
+ SensorQuantised.Voltage[LoopIterator/2]=quantiz(vstart,vstep,Sensor.Voltage[LoopIterator]);
+
+ else
+ SensorQuantised.Voltage[(LoopIterator)/2]=SensorQuantised.Voltage[(LoopIterator)/2]<<4+quantiz(vstart,vstep,Sensor.Voltage[LoopIterator]);
+
+
+
+ // The following lines are used to iterate the select lines from 0 to 15
+ //following is an algorithm similar to counting binary numbers of 4 bit
+ for(SelectLineIterator=3;SelectLineIterator>=0;SelectLineIterator--)
+ {
+ if(SelectLinesA[SelectLineIterator]==0)
+ {
+ SelectLinesA[SelectLineIterator]=1;
+ break;
+ }
+ else SelectLinesA[SelectLineIterator]=0;
+
+ }
+
+
+ wait_us(10.0); // A delay of 10 microseconds between each sensor output. Can be changed.
+
+ }
+
+
+
+
+
+ //measurement from current sensor=> 8 sensors in place
+
+ for(LoopIterator=0; LoopIterator<8; LoopIterator++)
+{
+ //following lines read the sensor values and stores them in 'SensorData' structure variable 'Sensor'
+ Sensor.Current[LoopIterator]=(CurrentInput.read()*3.3/(50*rsens));
+ if(LoopIterator%2==0)
+ SensorQuantised.Current[LoopIterator/2]=quantiz(cstart,cstep,Sensor.Current[LoopIterator]);
+ else
+ SensorQuantised.Current[(LoopIterator)/2]=SensorQuantised.Current[(LoopIterator)/2]<<4+quantiz(cstart,cstep,Sensor.Current[LoopIterator]);
+
+
+ // The following lines are used to iterate the select lines from 0 to 7
+ //following is an algorithm similar to counting binary numbers of 3 bits
+ for(SelectLineIterator=2;SelectLineIterator>=0;SelectLineIterator--)
+ {
+ if(SelectLinesB[SelectLineIterator]==0)
+ {
+ SelectLinesB[SelectLineIterator]=1;
+ break;
+ }
+ else SelectLinesB[SelectLineIterator]=0;
+
+ }
+
+
+ wait_us(10.0); // A delay of 10 microseconds between each sensor output. Can be changed.
+
+}
+
+
+//measurement of temperature
+//temperature measurement=> 4 thermistors, 1 temperature sensor
+//mux line 1=>temp sensor, mux lines 2 to 5 =>thermistors
+
+ for(LoopIterator=0; LoopIterator<5; LoopIterator++)
+{
+ //following lines read the sensor values and stores them in 'SensorData' structure variable 'Sensor'
+ Sensor.Temperature[LoopIterator]=(-90.7*3.3*TemperatureInput.read()+190.1543);
+ voltage_thermistor=TemperatureInput.read()*3.3;//voltage across thermistor
+ resistance_thermistor=24000*voltage_thermistor/(3.3-voltage_thermistor);//resistance of thermistor
+ //PanelTemperature will be updated depending on voltage_thermistor value later in the lines to follow
+
+ if(LoopIterator%2==0)
+ {
+ if(LoopIterator<1) //->corresponding to temperature sensor
+ SensorQuantised.Temperature[(LoopIterator)/2]=quantiz(tstart,tstep,Sensor.Temperature[LoopIterator]);
+
+ else //->corresponding to thermistor
+ {
+ if(voltage_thermistor<1.378) //Temperature>12 degC
+ Sensor.PanelTemperature[(LoopIterator-1)]=(3694/log(24.032242*resistance_thermistor));
+
+ else
+ Sensor.PanelTemperature[(LoopIterator-1)]=(3365.4792/log(7.60404*resistance_thermistor));
+
+
+ SensorQuantised.PanelTemperature[(LoopIterator-1)/2]=quantiz(tstart_thermistor,tstep_thermistor,Sensor.PanelTemperature[(LoopIterator-1)]);
+
+ }
+
+ }
+
+ else
+ {
+ if(LoopIterator<1)
+ SensorQuantised.Temperature[(LoopIterator)/2]=SensorQuantised.Temperature[(LoopIterator)/2]<<4+quantiz(tstart,tstep,Sensor.Temperature[LoopIterator]);
+
+ else
+ {
+ if(voltage_thermistor<1.378) //Temperature>12 degC
+ Sensor.PanelTemperature[LoopIterator-1]=(3694/log(24.032242*resistance_thermistor));
+
+
+ else
+ Sensor.PanelTemperature[LoopIterator-1]=(3365.4792/log(7.60404*resistance_thermistor));
+
+ SensorQuantised.PanelTemperature[(LoopIterator-1)/2]=SensorQuantised.PanelTemperature[(LoopIterator-1)/2]<<4+quantiz(tstart_thermistor,tstep_thermistor,Sensor.PanelTemperature[LoopIterator-1]);
+
+ }
+
+ }
+
+strcpy(SensorQuantised.Voltage,"green");
+
+// The following lines are used to iterate the select lines from 0 to 4
+
+ //following is an algorithm similar to counting binary numbers of 4 bit
+ for(SelectLineIterator=3;SelectLineIterator>=0;SelectLineIterator--)
+ {
+ if(SelectLinesC[SelectLineIterator]==0)
+ {
+ SelectLinesC[SelectLineIterator]=1;
+ break;
+ }
+ else SelectLinesC[SelectLineIterator]=0;
+
+ }
+
+
+ wait_us(10.0); // A delay of 10 microseconds between each sensor output. Can be changed.
+
+}
+
+
+
+
+
+ //update magnetometer data->
+ //populate values in structure variable 'Sensor' from data to be given by Green
+ SensorQuantised.AngularSpeed[0]=quantiz(AngularSpeed_start,AngularSpeed_step,Sensor.AngularSpeed[1]);
+ SensorQuantised.AngularSpeed[0]=SensorQuantised.AngularSpeed[0]<<4+quantiz(AngularSpeed_start,AngularSpeed_step,Sensor.AngularSpeed[0]);
+ SensorQuantised.AngularSpeed[1]=quantiz(AngularSpeed_start,AngularSpeed_step,Sensor.AngularSpeed[2]);
+
+ //update gyro data->
+ //populate values in structure variable 'Sensor' from data to be given by Green
+ SensorQuantised.Bnewvalue[0]=quantiz(Bnewvalue_start,Bnewvalue_step,Sensor.Bnewvalue[1]);
+ SensorQuantised.Bnewvalue[0]=SensorQuantised.Bnewvalue[0]<<4+quantiz(Bnewvalue_start,Bnewvalue_step,Sensor.Bnewvalue[0]);
+ SensorQuantised.Bnewvalue[1]=quantiz(Bnewvalue_start,Bnewvalue_step,Sensor.Bnewvalue[2]);
+
+
+
+
+ //update beacon structure
+ init_beacon(&Shortbeacon,SensorQuantised);//Shortbeacon is passed
+
+
+}
+
+
+