Guillaume Lefrant
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
Diff: ThermalDisplayer.cpp
- Revision:
- 2:5d0c209e5c61
- Parent:
- 1:06713d1b69cf
- Child:
- 3:a4dac093a968
--- a/ThermalDisplayer.cpp Tue Feb 09 21:41:48 2016 +0000
+++ b/ThermalDisplayer.cpp Wed Feb 10 01:01:54 2016 +0000
@@ -1,24 +1,48 @@
#include "ThermalDisplayer.h"
-ThermalDisplayer::ThermalDisplayer() {
- this->lcd = new C12832(D11, D13, D12, D7, D10);
- this->pot = new AnalogIn(A1);
- this->temperatures = std::list<float>(MAX_SIZE);
+/*
+ * 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;
}
-void ThermalDisplayer::addTemp(const float &temp) {
+/*
+ * Add record to temperature historic
+ */
+void ThermalDisplayer::addTemp(const float &temp)
+{
this->temperatures.pop_front();
this->temperatures.push_back(temp);
}
-void ThermalDisplayer::display() {
+/*
+ * 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++) {
- float tmp = *it;
-
- this->lcd->rect(pos * 2, 32, pos * 2 + 1, 32 - (int) (tmp * 32.0 / 50.0), 1);
+ 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);
}
\ No newline at end of file