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

Diff: ThermalDisplayer.cpp

Revision:
3:a4dac093a968
Parent:
2:5d0c209e5c61
Child:
4:5bf99eb2d740
--- a/ThermalDisplayer.cpp	Wed Feb 10 01:01:54 2016 +0000
+++ b/ThermalDisplayer.cpp	Wed Feb 10 01:41:39 2016 +0000
@@ -22,16 +22,20 @@
 
 /*
  *  Display informations to the LCD screen
- *  Screen if flusing and flashing everytime but this is the only way to secure data integrity.
+ *  Screen isn't even flusing !
  */
 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++) {
         int height = (int) (32 * ((*it) - this->minScale) / (this->maxScale - this->minScale));
+        /*
+         *  Draw a white rectangle to erase previous data.
+         *  Then, draw again.
+         */
+        this->lcd->rect(pos * 2, 0, pos * 2 + 1, 32, 0);
         this->lcd->rect(pos * 2, height < 0 ? 31 : 32 - height, pos * 2 + 1, 32, 1);
     }
 }