Peter Drescher / Mbed 2 deprecated app-board-RGB2

Example program to cycle the RGB LED on the mbed application board through all colours

Dependencies:   C12832_lcd LCD_fonts mbed

Fork of app-board-RGB by Chris Styles

Test Program to show the RGB Led on the mbed Lab Board

The color is changed by Pot 2, the value by Pot 1.

The program use a function to convert hue , saturation and value to RGB.

With this parameters you can change the color thru the rainbow. see http://en.wikipedia.org/wiki/HSL_and_HSV

Files at this revision

API Documentation at this revision

Revision 2:52c13333401e, committed 2012-10-20

Comitter:
dreschpe
Date:
Sat Oct 20 09:14:13 2012 +0000
Parent:
1:670665e77763
Child:
3:139f52e5e15c
Commit message:
change ADC scaling

Changed in this revision

main.cpp Show annotated file Show diff for this revision Revisions of this file 
--- a/main.cpp	Sat Oct 20 00:21:54 2012 +0000
+++ b/main.cpp	Sat Oct 20 09:14:13 2012 +0000
@@ -5,6 +5,8 @@
   * the saturation is set to maximum
   * 
   * Copyright (c) 2012 Peter Drescher - DC2PD
+  * This Demo run only on LPC1768 !
+  * The LPC11U24 has different PWM pins !
   */   
 
 
@@ -89,7 +91,7 @@
 {
     float h;       //  hue 
     float s,v;   // saturation and  value;
-    float temp,temp2;
+    unsigned short temp;
     r.period(0.001);  // set pwm period
     
     LCD.claim(stdout);      // send stdout to the LCD display
@@ -97,19 +99,20 @@
     LCD.locate(10,0);
     LCD.set_font((unsigned char*) Arial_9);
     printf("RGB Led Demo");
+    LCD.copy_to_lcd();
     LCD.set_font((unsigned char*) Small_7);
     s = 1.0;
     for(;;){
         // get Poti 1 for color
-        temp = Pot1.read();
-        temp2 = Pot1.read();
-        h = (temp + temp2) * 180;
+        temp = Pot1.read_u16();
+        temp = temp >> 6;        // truncate to 10 Bit
+        h = temp * 0.3515625;  // scale to 0 - 360;
         LCD.locate(0,13);
-        printf("Colour = %3.2f ",h);
+        printf("Colour = %3.2f degree",h);
         // get Poti 2 fo value
-        temp = Pot2.read();
-        temp2 = Pot2.read();
-        v = (temp + temp2) / 2;
+        temp = Pot2.read_u16();
+        temp = temp >> 6;
+        v = temp * 0.0009765624;  // scale to 0 - 1;
         LCD.locate(0,23);
         printf("Val = %01.3f ",v);
         LCD.copy_to_lcd();