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

SalinityController.cpp@7:8b3aef52aa7b, 2016-06-10 (annotated)

Committer:
joran
Date:
Fri Jun 10 12:29:33 2016 +0000
Revision:
7:8b3aef52aa7b
Parent:
6:067e999b9c6e
Child:
10:fd4670ec0806
Salinity update

Who changed what in which revision?

UserRevisionLine numberNew contents of line
6366295 0:dab140a197e0 1 #include "SalinityController.h"
6366295 0:dab140a197e0 2
6366295 0:dab140a197e0 3 AnalogIn salinity_sensor(p19);
6366295 0:dab140a197e0 4
6366295 0:dab140a197e0 5 SalinityController::SalinityController()
6366295 0:dab140a197e0 6 {
6366295 0:dab140a197e0 7 printf("Initiate Salinity Controller\r\n");
6366295 0:dab140a197e0 8 }
6366295 0:dab140a197e0 9
6366295 0:dab140a197e0 10 // Function reads sensor values and averages N sensor values
6366295 0:dab140a197e0 11 float SalinityController::readSensor()
6366295 0:dab140a197e0 12 {
6366295 0:dab140a197e0 13 float analogin_value = 0;
6366295 0:dab140a197e0 14 float ppt = 0;
6366295 0:dab140a197e0 15
6366295 0:dab140a197e0 16 // Read 0-1.0 value
6366295 0:dab140a197e0 17 for(int i = 0; i < N; i++)
6366295 0:dab140a197e0 18 {
6366295 0:dab140a197e0 19 analogin_value += salinity_sensor.read();
6366295 0:dab140a197e0 20 }
6366295 0:dab140a197e0 21 // Average 10 sensor values
6366295 0:dab140a197e0 22 analogin_value /= (float) N;
6366295 0:dab140a197e0 23
6366295 0:dab140a197e0 24 ppt = analoginToPPT(analogin_value);
6366295 0:dab140a197e0 25
6366295 0:dab140a197e0 26 return ppt;
6366295 0:dab140a197e0 27 }
6366295 0:dab140a197e0 28
6366295 0:dab140a197e0 29 // Function converts average sensor value to ppt
6366295 0:dab140a197e0 30 float SalinityController::analoginToPPT(float analogin_value)
6366295 0:dab140a197e0 31 {
6366295 0:dab140a197e0 32 float voltage = 0;
6366295 0:dab140a197e0 33 float ppt = 0;
6366295 0:dab140a197e0 34
6366295 0:dab140a197e0 35 // Convert average sensor value to value with range 0-5.0v
6366295 0:dab140a197e0 36 voltage = analogin_value * 3.3f * (5.0f/3.0f);
6366295 0:dab140a197e0 37
joran 6:067e999b9c6e 38 // printf("Sensor Voltage: %f \t", voltage);
6366295 1:eb527bc93b62 39
6366295 0:dab140a197e0 40 // Convert voltage to ppt
6366295 4:4011a1562a77 41 // ppt = voltage * 16.3;
6366295 4:4011a1562a77 42 ppt = voltage * 15.1747217178 - 2.89491343498;
6366295 0:dab140a197e0 43
6366295 0:dab140a197e0 44 return ppt;
6366295 0:dab140a197e0 45 }
6366295 0:dab140a197e0 46
joran 6:067e999b9c6e 47 float SalinityController::getPPT()
joran 6:067e999b9c6e 48 {
joran 6:067e999b9c6e 49 float ppt = 0;
joran 6:067e999b9c6e 50
joran 6:067e999b9c6e 51 ppt = readSensor();
joran 6:067e999b9c6e 52
joran 6:067e999b9c6e 53 return ppt;
joran 6:067e999b9c6e 54 }
joran 6:067e999b9c6e 55
joran 6:067e999b9c6e 56 float SalinityController::getVoltage()
joran 6:067e999b9c6e 57 {
joran 6:067e999b9c6e 58 float voltage = 0;
joran 6:067e999b9c6e 59
joran 6:067e999b9c6e 60 float analogin_value = 0;
joran 7:8b3aef52aa7b 61
joran 6:067e999b9c6e 62
joran 6:067e999b9c6e 63 // Read 0-1.0 value
joran 6:067e999b9c6e 64 for(int i = 0; i < N; i++)
joran 6:067e999b9c6e 65 {
joran 6:067e999b9c6e 66 analogin_value += salinity_sensor.read();
joran 6:067e999b9c6e 67 }
joran 6:067e999b9c6e 68 // Average 10 sensor values
joran 6:067e999b9c6e 69 analogin_value /= (float) N;
joran 6:067e999b9c6e 70 voltage = analogin_value * 3.3f * (5.0f/3.0f);
joran 6:067e999b9c6e 71
joran 6:067e999b9c6e 72 return voltage;
joran 6:067e999b9c6e 73 }
joran 6:067e999b9c6e 74
joran 7:8b3aef52aa7b 75 float SalinityController::voltToSensor(float inputvolt)
joran 7:8b3aef52aa7b 76 {
joran 7:8b3aef52aa7b 77 float slope = 0.7931723;
joran 7:8b3aef52aa7b 78 float intercept = 0.0050561;
joran 7:8b3aef52aa7b 79
joran 7:8b3aef52aa7b 80 float offset = (slope * inputvolt) - intercept;
joran 7:8b3aef52aa7b 81
joran 7:8b3aef52aa7b 82 return inputvolt + offset;
joran 7:8b3aef52aa7b 83 }
joran 7:8b3aef52aa7b 84
joran 7:8b3aef52aa7b 85 float SalinityController::sensorToPPT(float inputvolt)
joran 7:8b3aef52aa7b 86 {
joran 7:8b3aef52aa7b 87 float minimum = 0.03778499;
joran 7:8b3aef52aa7b 88 if (inputvolt <= minimum) return 0.00;
joran 7:8b3aef52aa7b 89
joran 7:8b3aef52aa7b 90 float slope = 11.53368;
joran 7:8b3aef52aa7b 91 float intercept = 0.43580;
joran 7:8b3aef52aa7b 92
joran 7:8b3aef52aa7b 93 float ppt = (slope * inputvolt) - intercept;
joran 7:8b3aef52aa7b 94
joran 7:8b3aef52aa7b 95 return ppt;
joran 7:8b3aef52aa7b 96 }
joran 7:8b3aef52aa7b 97
joran 7:8b3aef52aa7b 98 float SalinityController::getAdjustedPPT()
joran 7:8b3aef52aa7b 99 {
joran 7:8b3aef52aa7b 100 return sensorToPPT(voltToSensor(getVoltage()));
joran 7:8b3aef52aa7b 101 }
6366295 0:dab140a197e0 102 // Function prints salinity sensor value in ppt
6366295 0:dab140a197e0 103 void SalinityController::displayPPT()
6366295 0:dab140a197e0 104 {
6366295 0:dab140a197e0 105 float ppt = 0;
6366295 0:dab140a197e0 106
6366295 0:dab140a197e0 107 ppt = readSensor();
6366295 0:dab140a197e0 108
6366295 0:dab140a197e0 109 printf("Salinity: %f ppt\t", ppt);
6366295 0:dab140a197e0 110 }