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@6:6c61186c8739, 2016-02-22 (annotated)

Committer:
co838_gtvl2
Date:
Mon Feb 22 19:09:17 2016 +0000
Revision:
6:6c61186c8739
Parent:
4:5bf99eb2d740 
New version (might be FINAL) including sleep() for lowering power consumption and MyTimeout (custom class of Timeout) to deal with interrupts without breaking cycle delay. No more RTOS Thread, now using Serial::attach() to deal with keyboard input.

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 }