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@8:6f30f477fa23, 2016-02-23 (annotated)

Committer:
co838_gtvl2
Date:
Tue Feb 23 18:13:35 2016 +0000
Revision:
8:6f30f477fa23
Parent:
6:6c61186c8739 
V1.0.1; Updated init of variables and LEDs; Removed unused file

Who changed what in which revision?

UserRevisionLine numberNew contents of line
co838_gtvl2 1:06713d1b69cf 1 #include "ThermalDisplayer.h"
co838_gtvl2 1:06713d1b69cf 2
co838_gtvl2 6:6c61186c8739 3 /**
co838_gtvl2 2:5d0c209e5c61 4 * Constructor, initialize Potentiometer, LCD and variables
co838_gtvl2 2:5d0c209e5c61 5 */
co838_gtvl2 6:6c61186c8739 6 ThermalDisplayer::ThermalDisplayer()
co838_gtvl2 6:6c61186c8739 7 : pot(A1),
co838_gtvl2 6:6c61186c8739 8 accel(PTE25, PTE24, FXOS8700CQ_SLAVE_ADDR1)
co838_gtvl2 2:5d0c209e5c61 9 {
co838_gtvl2 2:5d0c209e5c61 10 this->lcd = new C12832(D11, D13, D12, D7, D10);
co838_gtvl2 4:5bf99eb2d740 11 this->lcd->set_auto_up(0);
co838_gtvl2 2:5d0c209e5c61 12 this->temperatures = std::list<float>(MAX_SIZE);
co838_gtvl2 2:5d0c209e5c61 13 this->minScale = MIN_MIN_SCALE;
co838_gtvl2 2:5d0c209e5c61 14 this->maxScale = MAX_MAX_SCALE;
co838_gtvl2 4:5bf99eb2d740 15 this->screenOrientation = true;
co838_gtvl2 4:5bf99eb2d740 16 this->accel.enable();
co838_gtvl2 1:06713d1b69cf 17 }
co838_gtvl2 1:06713d1b69cf 18
co838_gtvl2 6:6c61186c8739 19 /**
co838_gtvl2 2:5d0c209e5c61 20 * Add record to temperature historic
co838_gtvl2 6:6c61186c8739 21 * @param const float &temp, the record to add.
co838_gtvl2 2:5d0c209e5c61 22 */
co838_gtvl2 2:5d0c209e5c61 23 void ThermalDisplayer::addTemp(const float &temp)
co838_gtvl2 2:5d0c209e5c61 24 {
co838_gtvl2 1:06713d1b69cf 25 this->temperatures.pop_front();
co838_gtvl2 1:06713d1b69cf 26 this->temperatures.push_back(temp);
co838_gtvl2 1:06713d1b69cf 27 }
co838_gtvl2 1:06713d1b69cf 28
co838_gtvl2 6:6c61186c8739 29 /**
co838_gtvl2 2:5d0c209e5c61 30 * Display informations to the LCD screen
co838_gtvl2 3:a4dac093a968 31 * Screen isn't even flusing !
co838_gtvl2 6:6c61186c8739 32 * For each temperature record, it draw a white rectangle to erase previous data
co838_gtvl2 6:6c61186c8739 33 * then draw on top of it the new data.
co838_gtvl2 2:5d0c209e5c61 34 */
co838_gtvl2 2:5d0c209e5c61 35 void ThermalDisplayer::display()
co838_gtvl2 2:5d0c209e5c61 36 {
co838_gtvl2 6:6c61186c8739 37 std::list<float>::const_iterator it;
co838_gtvl2 2:5d0c209e5c61 38
co838_gtvl2 1:06713d1b69cf 39 int pos = 0;
co838_gtvl2 1:06713d1b69cf 40 for (it = this->temperatures.begin(); it != this->temperatures.end(); it++, pos++) {
co838_gtvl2 2:5d0c209e5c61 41 int height = (int) (32 * ((*it) - this->minScale) / (this->maxScale - this->minScale));
co838_gtvl2 4:5bf99eb2d740 42 height = height > DISPLAY_Y ? DISPLAY_Y : (height < 0 ? 0 : height);
co838_gtvl2 4:5bf99eb2d740 43 if (this->screenOrientation) {
co838_gtvl2 4:5bf99eb2d740 44 this->lcd->rect(pos * 2, 0, pos * 2 + 1, DISPLAY_Y, 0);
co838_gtvl2 4:5bf99eb2d740 45 this->lcd->rect(pos * 2, DISPLAY_Y - height, pos * 2 + 1, DISPLAY_Y, 1);
co838_gtvl2 4:5bf99eb2d740 46 } else {
co838_gtvl2 4:5bf99eb2d740 47 this->lcd->rect(DISPLAY_X - (pos * 2), 0, DISPLAY_X - (pos * 2 + 1), DISPLAY_Y, 0);
co838_gtvl2 4:5bf99eb2d740 48 this->lcd->rect(DISPLAY_X - (pos * 2), 0, DISPLAY_X - (pos * 2 + 1), height, 1);
co838_gtvl2 4:5bf99eb2d740 49 }
co838_gtvl2 1:06713d1b69cf 50 }
co838_gtvl2 4:5bf99eb2d740 51 this->lcd->copy_to_lcd();
co838_gtvl2 2:5d0c209e5c61 52 }
co838_gtvl2 2:5d0c209e5c61 53
co838_gtvl2 6:6c61186c8739 54 /**
co838_gtvl2 2:5d0c209e5c61 55 * Adjust scale of the display according to POT2
co838_gtvl2 4:5bf99eb2d740 56 * Also adjust the screen orientation accodring to FXOS8700CQ accelerometer
co838_gtvl2 2:5d0c209e5c61 57 */
co838_gtvl2 6:6c61186c8739 58 void ThermalDisplayer::adjustScale()
co838_gtvl2 2:5d0c209e5c61 59 {
co838_gtvl2 2:5d0c209e5c61 60 float potValue = this->pot;
co838_gtvl2 2:5d0c209e5c61 61
co838_gtvl2 2:5d0c209e5c61 62 this->minScale = MIN_MIN_SCALE + potValue * (MAX_MIN_SCALE - MIN_MIN_SCALE);
co838_gtvl2 2:5d0c209e5c61 63 this->maxScale = MIN_MAX_SCALE + (1.0f - potValue) * (MAX_MAX_SCALE - MIN_MAX_SCALE);
co838_gtvl2 4:5bf99eb2d740 64
co838_gtvl2 4:5bf99eb2d740 65 SRAWDATA accel_data;
co838_gtvl2 4:5bf99eb2d740 66 SRAWDATA magn_data;
co838_gtvl2 4:5bf99eb2d740 67 uint8_t data = this->accel.get_data(&accel_data, &magn_data);
co838_gtvl2 4:5bf99eb2d740 68 if (accel_data.y <= -100) {
co838_gtvl2 4:5bf99eb2d740 69 this->screenOrientation = false;
co838_gtvl2 4:5bf99eb2d740 70 } else {
co838_gtvl2 4:5bf99eb2d740 71 this->screenOrientation = true;
co838_gtvl2 4:5bf99eb2d740 72 }
co838_gtvl2 1:06713d1b69cf 73 }