Diff: main.cpp

Revision:

0:65445b54da31

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Sep 22 15:08:28 2017 +0000
@@ -0,0 +1,126 @@
+/**************************************************************
+/ RGB LED Colour Variation Program
+/
+/ The program varies the colour of the RGB LED based on the
+/ analogue input value of Pot2
+/
+/**************************************************************/
+#include "mbed.h"
+Serial pc(USBTX, USBRX); // USB serial interface
+AnalogIn A_in(p20); // analogue input pin for reference values
+//DigitalOut myled(LED1); // onboard LED to indicate activity
+PwmOut Rled(p23); // red component of application board RGB LED
+PwmOut Gled(p24); // green component of application board RGB LED
+PwmOut Bled(p25); // blue component of application board RGB LED
+int main() {
+    
+    float analogue_val=0.0; // variable to hold the analogue input values as decimals
+ float colour_level[11][4]={{0.09,1.0,0.0,0.0},
+{0.18,1.0,0.5,0.0},
+{0.27,1.0,1.0,0.0},
+{0.36,0.5,1.0,0.0},
+{0.45,0.0,1.0,0.0},
+{0.54,0.0,1.0,0.5},
+{0.63,0.0,1.0,1.0},
+{0.72,0.0,0.5,1.0},
+{0.81,0.0,0.0,1.0},
+{0.90,0.5,0.0,1.0},
+{1.00,1.0,0.0,1.0}}; // analogue input values vs. RGB levels
+    // set the USB serial interface baud rate
+    pc.baud(921600);
+ 
+    while(1) { // repeat indefinitely
+ 
+        // read the voltage on the analogue input pin and convert it to a
+        // decimal number with 12-bit resolution
+        analogue_val = A_in.read();
+        
+        // set the number of lit LEDs to be proportional to the ADC input value
+        if(analogue_val < 0.09) {
+            Rled = 1 ;
+            Gled = 0 ;
+            Bled = 0 ;
+           } 
+        else if(analogue_val < 0.18) {
+        
+            Rled = 1 ;                   
+            Gled = 0.5 ;
+            Bled = 0 ; 
+          
+        }
+       else if(analogue_val < 0.27) {
+        
+            Rled = 1 ;
+            Gled = 1 ;
+            Bled = 0 ; 
+          
+
+        }
+        else if(analogue_val < 0.36) {
+        
+            Rled = 0.5 ;
+            Gled = 1 ;
+            Bled = 0 ; 
+          
+
+        }
+       else if(analogue_val < 0.45) {
+        
+            Rled = 0 ;
+            Gled = 1 ;
+            Bled = 0 ; 
+          
+
+        }
+        else if(analogue_val < 0.54) {
+        
+            Rled = 0 ;
+            Gled = 1 ;
+            Bled = 0.5 ; 
+          
+
+        }
+        else if(analogue_val < 0.63) {
+        
+            Rled = 0 ;
+            Gled = 1 ;
+            Bled = 1 ; 
+          
+
+         }   
+        else if(analogue_val < 0.72) {
+        
+            Rled = 0 ;
+            Gled = 0.5 ;
+            Bled = 1 ; 
+          
+
+        }
+        else if(analogue_val < 0.81) {
+        
+            Rled = 0 ;
+            Gled = 0 ;
+            Bled = 1 ; 
+          
+
+        }
+        else if(analogue_val < 0.9) {
+        
+            Rled = 0.5 ;
+            Gled = 0 ;
+            Bled = 1 ; 
+          
+
+        }
+        else if(analogue_val < 0.1) {
+        
+            Rled = 1 ;
+            Gled = 0 ;
+            Bled = 1 ; 
+          
+
+        
+
+        }
+       
+}}