Saltware / Mbed 2 deprecated Water Play

Program for the water play project for the course Software Testing Practical 2016 given at the VU University

Dependencies:   mbed DRV88255 TextLCD Ping mbed-rtos

TemperatureController.cpp@13:1323e2c0b697, 2016-06-11 (annotated)

Committer:
sbouber1
Date:
Sat Jun 11 13:19:20 2016 +0000
Revision:
13:1323e2c0b697
Parent:
10:fd4670ec0806
Child:
35:c9261391a995
.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
6366295 0:dab140a197e0 1 #include "TemperatureController.h"
sbouber1 9:b3674516729d 2 #include "rtos.h"
sbouber1 13:1323e2c0b697 3 #include "testing.h"
6366295 0:dab140a197e0 4
6366295 0:dab140a197e0 5 AnalogIn temperature_sensor(p20);
6366295 2:f6ebc225f232 6 DigitalOut heater(p18);
6366295 0:dab140a197e0 7
sbouber1 10:fd4670ec0806 8 float TemperatureController::getValue() {
sbouber1 10:fd4670ec0806 9 return this->temperature;
6366295 0:dab140a197e0 10 }
6366295 0:dab140a197e0 11
sbouber1 10:fd4670ec0806 12 std::string TemperatureController::get_name() {
sbouber1 10:fd4670ec0806 13 return "TemperatureController";
sbouber1 9:b3674516729d 14 }
sbouber1 9:b3674516729d 15
sbouber1 9:b3674516729d 16 void TemperatureController::update() {
sbouber1 9:b3674516729d 17 this->temperature = readSensor();
sbouber1 9:b3674516729d 18 }
sbouber1 9:b3674516729d 19
sbouber1 13:1323e2c0b697 20 bool TemperatureController::is_heating() {
sbouber1 13:1323e2c0b697 21 return this->heating;
sbouber1 13:1323e2c0b697 22 }
sbouber1 13:1323e2c0b697 23
sbouber1 13:1323e2c0b697 24 void TemperatureController::set_heating(bool enabled) {
sbouber1 13:1323e2c0b697 25 if(enabled == this->heating) return;
sbouber1 13:1323e2c0b697 26
sbouber1 13:1323e2c0b697 27 this->heating = enabled;
sbouber1 13:1323e2c0b697 28 if(enabled) {
sbouber1 13:1323e2c0b697 29 #ifdef RUN_TESTS
sbouber1 13:1323e2c0b697 30 printf("Should set heater to 1\r\n");
sbouber1 13:1323e2c0b697 31 #else
sbouber1 13:1323e2c0b697 32 heater = 1;
sbouber1 13:1323e2c0b697 33 #endif
sbouber1 13:1323e2c0b697 34 } else {
sbouber1 13:1323e2c0b697 35 #ifdef RUN_TESTS
sbouber1 13:1323e2c0b697 36 printf("Should set heater to 0\r\n");
sbouber1 13:1323e2c0b697 37 #else
sbouber1 13:1323e2c0b697 38 heater = 0;
sbouber1 13:1323e2c0b697 39 #endif
sbouber1 13:1323e2c0b697 40 }
sbouber1 13:1323e2c0b697 41 }
sbouber1 13:1323e2c0b697 42
6366295 0:dab140a197e0 43 // Function reads sensor values and averages N sensor values
6366295 0:dab140a197e0 44 float TemperatureController::readSensor()
6366295 0:dab140a197e0 45 {
6366295 1:eb527bc93b62 46 float analogin_value = 0;
6366295 1:eb527bc93b62 47 float temperature = 0;
6366295 0:dab140a197e0 48
sbouber1 9:b3674516729d 49 Timer t;
sbouber1 9:b3674516729d 50
sbouber1 9:b3674516729d 51 t.start();
sbouber1 9:b3674516729d 52
6366295 0:dab140a197e0 53 // Read 0-1.0 value
6366295 0:dab140a197e0 54 for(int i = 0; i < N; i++)
6366295 0:dab140a197e0 55 {
6366295 0:dab140a197e0 56 analogin_value += temperature_sensor.read();
sbouber1 9:b3674516729d 57 Thread::wait(100);
6366295 0:dab140a197e0 58 }
sbouber1 9:b3674516729d 59
sbouber1 9:b3674516729d 60 t.stop();
sbouber1 9:b3674516729d 61
sbouber1 9:b3674516729d 62 printf("We did %d averages of temperature in %d ms\r\n", N, t.read_ms());
sbouber1 9:b3674516729d 63
sbouber1 9:b3674516729d 64 // Average N sensor values
6366295 0:dab140a197e0 65 analogin_value /= (float) N;
6366295 0:dab140a197e0 66
6366295 0:dab140a197e0 67 temperature = analoginToCelsius(analogin_value);
6366295 0:dab140a197e0 68
6366295 0:dab140a197e0 69 return temperature;
6366295 0:dab140a197e0 70 }
6366295 0:dab140a197e0 71
6366295 0:dab140a197e0 72 // Function converts average sensor value to ppt
6366295 0:dab140a197e0 73 float TemperatureController::analoginToCelsius(float analogin_value)
6366295 0:dab140a197e0 74 {
6366295 1:eb527bc93b62 75 float voltage = 0;
6366295 1:eb527bc93b62 76 float offset = 0;
6366295 1:eb527bc93b62 77 float rt = 0;
6366295 1:eb527bc93b62 78 float logrt = 0;
6366295 1:eb527bc93b62 79 float temperature = 0;
6366295 0:dab140a197e0 80
6366295 0:dab140a197e0 81 // Convert average sensor value to value with range 0-5.0v
6366295 1:eb527bc93b62 82 voltage = analogin_value * 3.3f * (5.0f/3.0f);
6366295 1:eb527bc93b62 83 //voltage /= 5.0;
6366295 1:eb527bc93b62 84 //voltage *= 1023;
6366295 1:eb527bc93b62 85
6366295 1:eb527bc93b62 86 offset = getOffset(voltage);
6366295 1:eb527bc93b62 87
6366295 1:eb527bc93b62 88 voltage += offset;
6366295 0:dab140a197e0 89
6366295 0:dab140a197e0 90 // Calcuate R_T
6366295 0:dab140a197e0 91 rt = (15000.0f * voltage) / (4.8f - voltage);
6366295 0:dab140a197e0 92
6366295 0:dab140a197e0 93 logrt = log(rt);
6366295 0:dab140a197e0 94 temperature = 1.0 / (0.00102119 + (0.000222468 * logrt) + (0.000000133342 * logrt*logrt*logrt));
6366295 0:dab140a197e0 95
6366295 0:dab140a197e0 96 temperature = temperature - 273.15;
6366295 0:dab140a197e0 97
6366295 0:dab140a197e0 98 return temperature;
6366295 0:dab140a197e0 99 }
6366295 0:dab140a197e0 100
6366295 0:dab140a197e0 101 // Function prints temperature sensor value in celsius
6366295 1:eb527bc93b62 102 void TemperatureController::displayTemperature()
6366295 0:dab140a197e0 103 {
6366295 1:eb527bc93b62 104 float temperature = 0;
6366295 0:dab140a197e0 105
6366295 0:dab140a197e0 106 temperature = readSensor();
6366295 0:dab140a197e0 107
6366295 0:dab140a197e0 108 printf("Temperature: %f Celsius\r\n", temperature);
6366295 1:eb527bc93b62 109 }
6366295 1:eb527bc93b62 110
6366295 1:eb527bc93b62 111 float TemperatureController::getOffset(float voltage)
6366295 1:eb527bc93b62 112 {
6366295 1:eb527bc93b62 113 float denominator_voltage, numerator_voltage, ratio, interpolation;
6366295 1:eb527bc93b62 114
6366295 1:eb527bc93b62 115 float voltage_table[15] = {1.43, 1.55, 1.53, 1.56, 1.62, 1.65, 1.67, 1.73, 1.75, 1.80, 1.82, 1.88, 1.93, 1.98, 2.00};
6366295 1:eb527bc93b62 116 float offset_table[15] = {0.33, 0.33, 0.40, 0.40, 0.39, 0.42, 0.43, 0.41, 0.45, 0.50, 0.54, 0.53, 0.52, 0.53, 0.56};
6366295 1:eb527bc93b62 117
6366295 1:eb527bc93b62 118 for(int i = 0; i < 14; i++)
6366295 1:eb527bc93b62 119 {
6366295 1:eb527bc93b62 120 if(voltage_table[i] <= voltage && voltage_table[i+1] >= voltage)
6366295 1:eb527bc93b62 121 {
6366295 1:eb527bc93b62 122 denominator_voltage = voltage_table[i+1] - voltage_table[i];
6366295 1:eb527bc93b62 123 numerator_voltage = voltage - voltage_table[i];
6366295 1:eb527bc93b62 124
6366295 1:eb527bc93b62 125 if(denominator_voltage != 0)
6366295 1:eb527bc93b62 126 {
6366295 1:eb527bc93b62 127 ratio = numerator_voltage / denominator_voltage;
6366295 1:eb527bc93b62 128
6366295 1:eb527bc93b62 129 interpolation = ((offset_table[i+1] - offset_table[i]) * ratio) + offset_table[i];
6366295 1:eb527bc93b62 130
6366295 1:eb527bc93b62 131 return interpolation;
6366295 1:eb527bc93b62 132 } else {
6366295 1:eb527bc93b62 133 return offset_table[i];
6366295 1:eb527bc93b62 134 }
6366295 1:eb527bc93b62 135 }
6366295 1:eb527bc93b62 136 }
6366295 1:eb527bc93b62 137
6366295 1:eb527bc93b62 138 if(voltage_table[14] < voltage)
6366295 1:eb527bc93b62 139 {
6366295 1:eb527bc93b62 140 return offset_table[14];
6366295 1:eb527bc93b62 141 } else {
6366295 1:eb527bc93b62 142 return offset_table[0];
6366295 1:eb527bc93b62 143 }
6366295 1:eb527bc93b62 144 }
6366295 1:eb527bc93b62 145
6366295 1:eb527bc93b62 146 void TemperatureController::controlHeater()
6366295 1:eb527bc93b62 147 {
sbouber1 13:1323e2c0b697 148 this->set_heating(this->getValue() < 32.0f);
6366295 1:eb527bc93b62 149
6366295 0:dab140a197e0 150 }