sakthi priya amirtharaj
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pcb_test_v1_1_1
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pcb_test_v1_1
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sakthi priya amirtharaj
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HK.cpp
00001 #include "HK.h" 00002 #include "pin_config.h" 00003 00004 00005 //GPIO pins used=> D2-D12, A0-A1 00006 00007 DigitalOut SelectLinesA[]={PIN43,PIN44,PIN45,PIN46}; //to mux1=>voltage mux , PTA 13-16 , CHNGE TO PIN43 LATER 00008 DigitalOut SelectLinesB[]={PIN56,PIN57,PIN58,PIN59}; //to mux2=>current mux(differential mux) , PTB 3,7,8,9 00009 DigitalOut SelectLinesC[]={PIN64,PIN65,PIN66,PIN67}; //to mux3=>temp mux PTB 18-21 00010 00011 //--------------------------------------------MSB is SelectLines[0],LSB is SelectLines[3]-------------------------------- 00012 00013 AnalogIn CurrentInput(PIN53); // output from Current Mux PTB0 00014 AnalogIn VoltageInput(PIN54); // output from Voltage Multiplexer PTB1 00015 AnalogIn TemperatureInput(PIN55); /*PTB2 output from Temperature Multiplexer,thermistor Multiplexer- same multiplexer for both(lines 1-4 for thermistor,line 0 for temperature sensor)*/ 00016 00017 00018 00019 int quantiz(float start,float step,float x) // accepts min and measured values and step->quantises on a scale 0-15..(4 bit quantisation) 00020 { 00021 int y=(x-start)/step; 00022 if(y<=0)y=0; 00023 if(y>=15)y=15; 00024 return y; 00025 } 00026 00027 void init_beacon(ShortBeacy* x,SensorDataQuantised y) 00028 { 00029 (*x).Voltage[0]=2; //quantised value 00030 (*x).Temp[0]=y.PanelTemperature[0]; //quantised value 00031 (*x).Temp[1]=y.PanelTemperature[1]; //quantised value 00032 (*x).AngularSpeed[0]=y.AngularSpeed[0]; 00033 (*x).AngularSpeed[1]=y.AngularSpeed[1]; 00034 00035 (*x).SubsystemStatus[0]=145; //dummy values----------to be changed------------------- 00036 (*x).ErrorFlag[0]=3; //dummy values----------to be changed------------------- 00037 } 00038 00039 SensorData Sensor; 00040 SensorDataQuantised SensorQuantised; 00041 ShortBeacy Shortbeacon; 00042 void FUNC_HK_MAIN() 00043 { 00044 //define structure variables 00045 00046 //initialise all selectlines to zeroes->1st line of muxes selected 00047 SelectLinesA[0]=SelectLinesA[1]=SelectLinesA[2]=SelectLinesA[3]=0; 00048 SelectLinesB[0]=SelectLinesB[1]=SelectLinesB[2]=0; 00049 SelectLinesC[0]=SelectLinesC[1]=SelectLinesC[2]=SelectLinesC[3]=0; 00050 00051 int LoopIterator; 00052 int SelectLineIterator; 00053 00054 float resistance_thermistor,voltage_thermistor;//for thermistor 00055 00056 //measurement from voltage sensor=> 16 sensors in place 00057 for(LoopIterator=0; LoopIterator<16; LoopIterator++) 00058 { 00059 //read the sensor values and stores them in 'SensorData' structure's variable 'Sensor' 00060 Sensor.Voltage[LoopIterator]=(VoltageInput.read()*3.3*5.545454);//resistors in voltage divider=>15Mohm,3.3Mohm 00061 00062 if(LoopIterator%2==0) 00063 SensorQuantised.Voltage[LoopIterator/2]=quantiz(vstart,vstep,Sensor.Voltage[LoopIterator]); 00064 00065 else 00066 SensorQuantised.Voltage[(LoopIterator)/2]=SensorQuantised.Voltage[(LoopIterator)/2]<<4+quantiz(vstart,vstep,Sensor.Voltage[LoopIterator]); 00067 00068 //iterate the select lines from 0 to 15 00069 for(SelectLineIterator=3;SelectLineIterator>=0;SelectLineIterator--) 00070 { 00071 if(SelectLinesA[SelectLineIterator]==0) 00072 { 00073 SelectLinesA[SelectLineIterator]=1; 00074 break; 00075 } 00076 else SelectLinesA[SelectLineIterator]=0; 00077 } 00078 00079 wait_us(10.0); // A delay of 10 microseconds between each sensor output. Can be changed. 00080 } 00081 00082 00083 //measurement from current sensor=> 8 sensors in place 00084 for(LoopIterator=0; LoopIterator<8; LoopIterator++) 00085 { 00086 //read the sensor values and stores them in 'SensorData' structure variable 'Sensor' 00087 Sensor.Current[LoopIterator]=(CurrentInput.read()*3.3/(50*rsens)); 00088 if(LoopIterator%2==0) 00089 SensorQuantised.Current[LoopIterator/2]=quantiz(cstart,cstep,Sensor.Current[LoopIterator]); 00090 else 00091 SensorQuantised.Current[(LoopIterator)/2]=SensorQuantised.Current[(LoopIterator)/2]<<4+quantiz(cstart,cstep,Sensor.Current[LoopIterator]); 00092 00093 //iterate the select lines from 0 to 7 00094 for(SelectLineIterator=2;SelectLineIterator>=0;SelectLineIterator--) 00095 { 00096 if(SelectLinesB[SelectLineIterator]==0) 00097 { 00098 SelectLinesB[SelectLineIterator]=1; 00099 break; 00100 } 00101 else SelectLinesB[SelectLineIterator]=0; 00102 00103 } 00104 00105 wait_us(10.0); // A delay of 10 microseconds between each sensor output. Can be changed. 00106 } 00107 00108 00109 //measurement of temperature 00110 //temperature measurement=> 4 thermistors, 1 temperature sensor 00111 //mux line 1=>temp sensor, mux lines 2 to 5 =>thermistors 00112 00113 for(LoopIterator=0; LoopIterator<5; LoopIterator++) 00114 { 00115 //read the sensor values and stores them in 'SensorData' structure variable 'Sensor' 00116 Sensor.Temperature[LoopIterator]=(-90.7*3.3*TemperatureInput.read()+190.1543); 00117 voltage_thermistor=TemperatureInput.read()*3.3;//voltage across thermistor 00118 resistance_thermistor=24000*voltage_thermistor/(3.3-voltage_thermistor);//resistance of thermistor 00119 if (LoopIterator==0) 00120 { 00121 printf(" \n\rTemp =%f",-90.7*3.3*TemperatureInput.read()+190.1543); 00122 } 00123 00124 if(LoopIterator%2==0) 00125 { 00126 if(LoopIterator<1) //->corresponding to temperature sensor 00127 SensorQuantised.Temperature[(LoopIterator)/2]=quantiz(tstart,tstep,Sensor.Temperature[LoopIterator]); 00128 00129 else //->corresponding to thermistor 00130 { 00131 if(voltage_thermistor<1.378) //Temperature>12 degC 00132 Sensor.PanelTemperature[(LoopIterator-1)]=(3694/log(24.032242*resistance_thermistor)); 00133 00134 else 00135 Sensor.PanelTemperature[(LoopIterator-1)]=(3365.4792/log(7.60404*resistance_thermistor)); 00136 00137 00138 SensorQuantised.PanelTemperature[(LoopIterator-1)/2]=quantiz(tstart_thermistor,tstep_thermistor,Sensor.PanelTemperature[(LoopIterator-1)]); 00139 00140 } 00141 } 00142 else 00143 { 00144 if(LoopIterator<1) 00145 SensorQuantised.Temperature[(LoopIterator)/2]=SensorQuantised.Temperature[(LoopIterator)/2]<<4+quantiz(tstart,tstep,Sensor.Temperature[LoopIterator]); 00146 00147 else 00148 { 00149 if(voltage_thermistor<1.378) //Temperature>12 degC 00150 Sensor.PanelTemperature[LoopIterator-1]=(3694/log(24.032242*resistance_thermistor)); 00151 else 00152 Sensor.PanelTemperature[LoopIterator-1]=(3365.4792/log(7.60404*resistance_thermistor)); 00153 00154 SensorQuantised.PanelTemperature[(LoopIterator-1)/2]=SensorQuantised.PanelTemperature[(LoopIterator-1)/2]<<4+quantiz(tstart_thermistor,tstep_thermistor,Sensor.PanelTemperature[LoopIterator-1]); 00155 } 00156 } 00157 // The following lines are used to iterate the select lines from 0 to 4 00158 for(SelectLineIterator=3;SelectLineIterator>=0;SelectLineIterator--) 00159 { 00160 if(SelectLinesC[SelectLineIterator]==0) 00161 { 00162 SelectLinesC[SelectLineIterator]=1; 00163 break; 00164 } 00165 else SelectLinesC[SelectLineIterator]=0; 00166 } 00167 00168 wait_us(10.0); // A delay of 10 microseconds between each sensor output. Can be changed. 00169 } 00170 00171 00172 //update magnetometer data-> 00173 //populate values in structure variable 'Sensor' from data to be given by Green 00174 SensorQuantised.AngularSpeed[0]=quantiz(AngularSpeed_start,AngularSpeed_step,Sensor.AngularSpeed[1]); 00175 SensorQuantised.AngularSpeed[0]=SensorQuantised.AngularSpeed[0]<<4+quantiz(AngularSpeed_start,AngularSpeed_step,Sensor.AngularSpeed[0]); 00176 SensorQuantised.AngularSpeed[1]=quantiz(AngularSpeed_start,AngularSpeed_step,Sensor.AngularSpeed[2]); 00177 00178 //update gyro data-> 00179 //populate values in structure variable 'Sensor' from data to be given by Green 00180 SensorQuantised.Bnewvalue[0]=quantiz(Bnewvalue_start,Bnewvalue_step,Sensor.Bnewvalue[1]); 00181 SensorQuantised.Bnewvalue[0]=SensorQuantised.Bnewvalue[0]<<4+quantiz(Bnewvalue_start,Bnewvalue_step,Sensor.Bnewvalue[0]); 00182 SensorQuantised.Bnewvalue[1]=quantiz(Bnewvalue_start,Bnewvalue_step,Sensor.Bnewvalue[2]); 00183 00184 //update beacon structure 00185 init_beacon(&Shortbeacon,SensorQuantised);//Shortbeacon is passed 00186 printf("\n here temperature :%d",SensorQuantised.Temperature); 00187 } 00188 00189 00190
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