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@4:5bf99eb2d740, 2016-02-10 (annotated)
- Committer:
- co838_gtvl2
- Date:
- Wed Feb 10 16:48:55 2016 +0000
- Revision:
- 4:5bf99eb2d740
- Parent:
- 3:a4dac093a968
- Child:
- 6:6c61186c8739
WOW !; Speed of display x100 and ability to reverse screen using accelerometer !
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
co838_gtvl2 | 1:06713d1b69cf | 1 | #include "ThermalDisplayer.h" |
co838_gtvl2 | 1:06713d1b69cf | 2 | |
co838_gtvl2 | 2:5d0c209e5c61 | 3 | /* |
co838_gtvl2 | 2:5d0c209e5c61 | 4 | * Constructor, initialize Potentiometer, LCD and variables |
co838_gtvl2 | 2:5d0c209e5c61 | 5 | */ |
co838_gtvl2 | 4:5bf99eb2d740 | 6 | ThermalDisplayer::ThermalDisplayer(): pot(A1), accel(PTE25, PTE24, FXOS8700CQ_SLAVE_ADDR1) |
co838_gtvl2 | 2:5d0c209e5c61 | 7 | { |
co838_gtvl2 | 2:5d0c209e5c61 | 8 | this->lcd = new C12832(D11, D13, D12, D7, D10); |
co838_gtvl2 | 4:5bf99eb2d740 | 9 | this->lcd->set_auto_up(0); |
co838_gtvl2 | 2:5d0c209e5c61 | 10 | this->temperatures = std::list<float>(MAX_SIZE); |
co838_gtvl2 | 2:5d0c209e5c61 | 11 | this->minScale = MIN_MIN_SCALE; |
co838_gtvl2 | 2:5d0c209e5c61 | 12 | this->maxScale = MAX_MAX_SCALE; |
co838_gtvl2 | 4:5bf99eb2d740 | 13 | this->screenOrientation = true; |
co838_gtvl2 | 4:5bf99eb2d740 | 14 | this->accel.enable(); |
co838_gtvl2 | 1:06713d1b69cf | 15 | } |
co838_gtvl2 | 1:06713d1b69cf | 16 | |
co838_gtvl2 | 2:5d0c209e5c61 | 17 | /* |
co838_gtvl2 | 2:5d0c209e5c61 | 18 | * Add record to temperature historic |
co838_gtvl2 | 2:5d0c209e5c61 | 19 | */ |
co838_gtvl2 | 2:5d0c209e5c61 | 20 | void ThermalDisplayer::addTemp(const float &temp) |
co838_gtvl2 | 2:5d0c209e5c61 | 21 | { |
co838_gtvl2 | 1:06713d1b69cf | 22 | this->temperatures.pop_front(); |
co838_gtvl2 | 1:06713d1b69cf | 23 | this->temperatures.push_back(temp); |
co838_gtvl2 | 1:06713d1b69cf | 24 | } |
co838_gtvl2 | 1:06713d1b69cf | 25 | |
co838_gtvl2 | 2:5d0c209e5c61 | 26 | /* |
co838_gtvl2 | 2:5d0c209e5c61 | 27 | * Display informations to the LCD screen |
co838_gtvl2 | 3:a4dac093a968 | 28 | * Screen isn't even flusing ! |
co838_gtvl2 | 2:5d0c209e5c61 | 29 | */ |
co838_gtvl2 | 2:5d0c209e5c61 | 30 | void ThermalDisplayer::display() |
co838_gtvl2 | 2:5d0c209e5c61 | 31 | { |
co838_gtvl2 | 1:06713d1b69cf | 32 | list<float>::const_iterator it; |
co838_gtvl2 | 2:5d0c209e5c61 | 33 | |
co838_gtvl2 | 1:06713d1b69cf | 34 | int pos = 0; |
co838_gtvl2 | 1:06713d1b69cf | 35 | for (it = this->temperatures.begin(); it != this->temperatures.end(); it++, pos++) { |
co838_gtvl2 | 2:5d0c209e5c61 | 36 | int height = (int) (32 * ((*it) - this->minScale) / (this->maxScale - this->minScale)); |
co838_gtvl2 | 4:5bf99eb2d740 | 37 | height = height > DISPLAY_Y ? DISPLAY_Y : (height < 0 ? 0 : height); |
co838_gtvl2 | 3:a4dac093a968 | 38 | /* |
co838_gtvl2 | 3:a4dac093a968 | 39 | * Draw a white rectangle to erase previous data. |
co838_gtvl2 | 4:5bf99eb2d740 | 40 | * Then, draw on top of it the new data. |
co838_gtvl2 | 3:a4dac093a968 | 41 | */ |
co838_gtvl2 | 4:5bf99eb2d740 | 42 | if (this->screenOrientation) { |
co838_gtvl2 | 4:5bf99eb2d740 | 43 | this->lcd->rect(pos * 2, 0, pos * 2 + 1, DISPLAY_Y, 0); |
co838_gtvl2 | 4:5bf99eb2d740 | 44 | this->lcd->rect(pos * 2, DISPLAY_Y - height, pos * 2 + 1, DISPLAY_Y, 1); |
co838_gtvl2 | 4:5bf99eb2d740 | 45 | } else { |
co838_gtvl2 | 4:5bf99eb2d740 | 46 | this->lcd->rect(DISPLAY_X - (pos * 2), 0, DISPLAY_X - (pos * 2 + 1), DISPLAY_Y, 0); |
co838_gtvl2 | 4:5bf99eb2d740 | 47 | this->lcd->rect(DISPLAY_X - (pos * 2), 0, DISPLAY_X - (pos * 2 + 1), height, 1); |
co838_gtvl2 | 4:5bf99eb2d740 | 48 | } |
co838_gtvl2 | 1:06713d1b69cf | 49 | } |
co838_gtvl2 | 4:5bf99eb2d740 | 50 | this->lcd->copy_to_lcd(); |
co838_gtvl2 | 2:5d0c209e5c61 | 51 | } |
co838_gtvl2 | 2:5d0c209e5c61 | 52 | |
co838_gtvl2 | 2:5d0c209e5c61 | 53 | /* |
co838_gtvl2 | 2:5d0c209e5c61 | 54 | * Adjust scale of the display according to POT2 |
co838_gtvl2 | 4:5bf99eb2d740 | 55 | * Also adjust the screen orientation accodring to FXOS8700CQ accelerometer |
co838_gtvl2 | 2:5d0c209e5c61 | 56 | */ |
co838_gtvl2 | 4:5bf99eb2d740 | 57 | void ThermalDisplayer::adjustScale(Serial &host) |
co838_gtvl2 | 2:5d0c209e5c61 | 58 | { |
co838_gtvl2 | 2:5d0c209e5c61 | 59 | float potValue = this->pot; |
co838_gtvl2 | 2:5d0c209e5c61 | 60 | |
co838_gtvl2 | 2:5d0c209e5c61 | 61 | this->minScale = MIN_MIN_SCALE + potValue * (MAX_MIN_SCALE - MIN_MIN_SCALE); |
co838_gtvl2 | 2:5d0c209e5c61 | 62 | this->maxScale = MIN_MAX_SCALE + (1.0f - potValue) * (MAX_MAX_SCALE - MIN_MAX_SCALE); |
co838_gtvl2 | 4:5bf99eb2d740 | 63 | |
co838_gtvl2 | 4:5bf99eb2d740 | 64 | SRAWDATA accel_data; |
co838_gtvl2 | 4:5bf99eb2d740 | 65 | SRAWDATA magn_data; |
co838_gtvl2 | 4:5bf99eb2d740 | 66 | uint8_t data = this->accel.get_data(&accel_data, &magn_data); |
co838_gtvl2 | 4:5bf99eb2d740 | 67 | if (accel_data.y <= -100) { |
co838_gtvl2 | 4:5bf99eb2d740 | 68 | this->screenOrientation = false; |
co838_gtvl2 | 4:5bf99eb2d740 | 69 | } else { |
co838_gtvl2 | 4:5bf99eb2d740 | 70 | this->screenOrientation = true; |
co838_gtvl2 | 4:5bf99eb2d740 | 71 | } |
co838_gtvl2 | 1:06713d1b69cf | 72 | } |