Guillaume Lefrant / Mbed 2 deprecated gtvl2_a3 Featured

This program is an advanced "IoT" thermometer using LM75B component library. It displays the current value to the Serial host in Celcius or Fahrenheit (possible to change using a switch). It also stores an historic and displays it to the user using the LCD screen. Moreover, you can change the orientation of the screen by turning the device, just like a smartphone.

Dependencies:   C12832 FXOS8700CQ LM75B mbed

ThermalDisplayer.cpp

Committer:
co838_gtvl2
Date:
2016-02-10
Revision:
2:5d0c209e5c61
Parent:
1:06713d1b69cf
Child:
3:a4dac093a968

File content as of revision 2:5d0c209e5c61:

#include "ThermalDisplayer.h"

/*
 *  Constructor, initialize Potentiometer, LCD and variables
 */
ThermalDisplayer::ThermalDisplayer(): pot(A1)
{
    this->lcd = new C12832(D11, D13, D12, D7, D10);
    this->temperatures = std::list<float>(MAX_SIZE);
    this->minScale = MIN_MIN_SCALE;
    this->maxScale = MAX_MAX_SCALE;
}

/*
 *  Add record to temperature historic
 */
void    ThermalDisplayer::addTemp(const float &temp)
{
    this->temperatures.pop_front();
    this->temperatures.push_back(temp);
}

/*
 *  Display informations to the LCD screen
 *  Screen if flusing and flashing everytime but this is the only way to secure data integrity.
 */
void    ThermalDisplayer::display()
{
    list<float>::const_iterator it;

    this->lcd->cls();
    int pos = 0;
    for (it = this->temperatures.begin(); it != this->temperatures.end(); it++, pos++) {
        int height = (int) (32 * ((*it) - this->minScale) / (this->maxScale - this->minScale));
        this->lcd->rect(pos * 2, height < 0 ? 31 : 32 - height, pos * 2 + 1, 32, 1);
    }
}

/*
 *  Adjust scale of the display according to POT2
 */
void    ThermalDisplayer::adjustScale()
{
    float potValue = this->pot; 

    this->minScale = MIN_MIN_SCALE + potValue * (MAX_MIN_SCALE - MIN_MIN_SCALE);
    this->maxScale = MIN_MAX_SCALE + (1.0f - potValue) * (MAX_MAX_SCALE - MIN_MAX_SCALE);
}