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@58:b5f0c0f305ff, 2016-06-19 (annotated)

Committer:
sbouber1
Date:
Sun Jun 19 22:39:16 2016 +0000
Revision:
58:b5f0c0f305ff
Parent:
42:e7c726f9c6ed
Child:
66:133398875949
update

Who changed what in which revision?

UserRevisionLine numberNew contents of line
6366295 0:dab140a197e0 1 #include "SalinityController.h"
6366295 0:dab140a197e0 2
sbouber1 58:b5f0c0f305ff 3 static AnalogIn salinity_sensor(p19);
6366295 0:dab140a197e0 4
joran 42:e7c726f9c6ed 5 //Read the sensor, update the local variable.
sbouber1 10:fd4670ec0806 6 void SalinityController::update() {
sbouber1 10:fd4670ec0806 7 this->salinity = SalinityController::getAdjustedPPT();
sbouber1 10:fd4670ec0806 8 }
sbouber1 10:fd4670ec0806 9
joran 42:e7c726f9c6ed 10 //Return the value, this function does not update the value.
sbouber1 10:fd4670ec0806 11 float SalinityController::getValue() {
sbouber1 10:fd4670ec0806 12 return this->salinity;
6366295 0:dab140a197e0 13 }
6366295 0:dab140a197e0 14
sbouber1 58:b5f0c0f305ff 15 //Read the voltage, get an average over NUM_MEASUREMENTS values defined in settings.h
sbouber1 58:b5f0c0f305ff 16 float SalinityController::getVoltage() {
joran 42:e7c726f9c6ed 17 float voltage = 0;
6366295 0:dab140a197e0 18 float analogin_value = 0;
6366295 0:dab140a197e0 19
6366295 0:dab140a197e0 20 // Read 0-1.0 value
sbouber1 58:b5f0c0f305ff 21 for(int i = 0; i < NUM_MEASUREMENTS; i++) {
6366295 0:dab140a197e0 22 analogin_value += salinity_sensor.read();
sbouber1 58:b5f0c0f305ff 23 Thread::wait(MEASUREMENT_DELAY);
6366295 0:dab140a197e0 24 }
6366295 0:dab140a197e0 25
sbouber1 58:b5f0c0f305ff 26 analogin_value /= (float) NUM_MEASUREMENTS;
joran 6:067e999b9c6e 27 voltage = analogin_value * 3.3f * (5.0f/3.0f);
joran 6:067e999b9c6e 28
joran 6:067e999b9c6e 29 return voltage;
joran 6:067e999b9c6e 30 }
joran 6:067e999b9c6e 31
joran 42:e7c726f9c6ed 32 //Convert inputvolt to corrected sensor value
sbouber1 58:b5f0c0f305ff 33 float SalinityController::voltToSensor(float inputvolt) {
joran 7:8b3aef52aa7b 34 float slope = 0.7931723;
joran 7:8b3aef52aa7b 35 float intercept = 0.0050561;
joran 7:8b3aef52aa7b 36
joran 7:8b3aef52aa7b 37 float offset = (slope * inputvolt) - intercept;
joran 7:8b3aef52aa7b 38
joran 7:8b3aef52aa7b 39 return inputvolt + offset;
joran 7:8b3aef52aa7b 40 }
joran 7:8b3aef52aa7b 41
joran 42:e7c726f9c6ed 42 //Convert corrected sensor value to actual PPT
sbouber1 58:b5f0c0f305ff 43 float SalinityController::sensorToPPT(float inputvolt) {
joran 7:8b3aef52aa7b 44 float slope = 11.53368;
sbouber1 58:b5f0c0f305ff 45 float intercept = 0.43580;
sbouber1 58:b5f0c0f305ff 46 float minimum = 0.03778499;
joran 7:8b3aef52aa7b 47
sbouber1 58:b5f0c0f305ff 48 if (inputvolt <= minimum)
sbouber1 58:b5f0c0f305ff 49 return 0.00;
joran 7:8b3aef52aa7b 50
sbouber1 58:b5f0c0f305ff 51 return (slope * inputvolt) - intercept;
joran 7:8b3aef52aa7b 52 }
joran 7:8b3aef52aa7b 53
joran 42:e7c726f9c6ed 54 //Chain the needed functions to get the proper PPT
sbouber1 58:b5f0c0f305ff 55 float SalinityController::getAdjustedPPT() {
joran 7:8b3aef52aa7b 56 return sensorToPPT(voltToSensor(getVoltage()));
joran 7:8b3aef52aa7b 57 }
joran 42:e7c726f9c6ed 58
sbouber1 10:fd4670ec0806 59
sbouber1 58:b5f0c0f305ff 60 std::string SalinityController::getName() {
sbouber1 10:fd4670ec0806 61 return "SalinityController";
joran 26:966bad4c6365 62 }