DemoBoard_EtchASketch

Published 22 Sep 2009, by Chris Styles

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main.cpp

00001 #include "DemoBoard.h"
00002 
00003 /*
00004  * This project uses the LCD, the two pots, and the three buttons to make a simple
00005  * Etch-a-Sketch. Set the colour using the buttons, and use the pots to draw!
00006  * Oh yeah, more than 1.5 in any axis will clear the screen :-)
00007  */
00008 
00009 int colour = 0x0;
00010 
00011 // Functions to set the draw colour. Write this to the RGB LED
00012 void RedRise() { colour = 0xff0000; rgb.write(colour);}
00013 void GreenRise() { colour = 0x00ff00; rgb.write(colour);}
00014 void BlueRise() { colour = 0x0000ff; rgb.write(colour);}
00015 
00016 int main() {
00017 
00018 
00019     // Attach the colour set functions to
00020     // rising edge interrupt handlers
00021     RedButton.rise(&RedRise);
00022     GreenButton.rise(&GreenRise);
00023     BlueButton.rise(&BlueRise);
00024 
00025     // set the screen background to white
00026     lcd.fill(0,0,130,130,0xffffff);
00027 
00028     while(1) {
00029         // fetch the values from the pots, and scale them to 0-130
00030         int x = potx * 130;
00031         int y = poty * 130;
00032         
00033         // draw the pixel!
00034         lcd.pixel(x,y,colour);
00035         wait(0.01);
00036         
00037         // If any axis of the accelerometer read > 1.5g, clear the screen
00038         if ( (acc.x() > 1.5) || (acc.y() > 1.5) || (acc.x() > 1.5) ) {
00039            lcd.cls();
00040            lcd.fill(0,0,130,130,0xffffff);
00041         }
00042         
00043     }
00044 
00045 }
00046 
00047