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:
- 4:5bf99eb2d740
- Parent:
- 3:a4dac093a968
- Child:
- 6:6c61186c8739
File content as of revision 4:5bf99eb2d740:
#include "ThermalDisplayer.h" /* * Constructor, initialize Potentiometer, LCD and variables */ ThermalDisplayer::ThermalDisplayer(): pot(A1), accel(PTE25, PTE24, FXOS8700CQ_SLAVE_ADDR1) { this->lcd = new C12832(D11, D13, D12, D7, D10); this->lcd->set_auto_up(0); this->temperatures = std::list<float>(MAX_SIZE); this->minScale = MIN_MIN_SCALE; this->maxScale = MAX_MAX_SCALE; this->screenOrientation = true; this->accel.enable(); } /* * 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 isn't even flusing ! */ void ThermalDisplayer::display() { list<float>::const_iterator it; 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)); height = height > DISPLAY_Y ? DISPLAY_Y : (height < 0 ? 0 : height); /* * Draw a white rectangle to erase previous data. * Then, draw on top of it the new data. */ if (this->screenOrientation) { this->lcd->rect(pos * 2, 0, pos * 2 + 1, DISPLAY_Y, 0); this->lcd->rect(pos * 2, DISPLAY_Y - height, pos * 2 + 1, DISPLAY_Y, 1); } else { this->lcd->rect(DISPLAY_X - (pos * 2), 0, DISPLAY_X - (pos * 2 + 1), DISPLAY_Y, 0); this->lcd->rect(DISPLAY_X - (pos * 2), 0, DISPLAY_X - (pos * 2 + 1), height, 1); } } this->lcd->copy_to_lcd(); } /* * Adjust scale of the display according to POT2 * Also adjust the screen orientation accodring to FXOS8700CQ accelerometer */ void ThermalDisplayer::adjustScale(Serial &host) { 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); SRAWDATA accel_data; SRAWDATA magn_data; uint8_t data = this->accel.get_data(&accel_data, &magn_data); if (accel_data.y <= -100) { this->screenOrientation = false; } else { this->screenOrientation = true; } }