Diff: RGBLed.h

Revision:

0:9dc33481ce1b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/RGBLed.h	Wed Mar 01 16:36:55 2017 +0000
@@ -0,0 +1,76 @@
+#include "mbed.h"
+ 
+//Class to control an RGB LED using three PWM pins
+class RGBLed
+{
+public:
+    RGBLed(PinName redpin, PinName greenpin, PinName bluepin);
+    void write(float red,float green, float blue);
+    void write(LEDColor c);
+    RGBLed operator = (LEDColor c) {
+        write(c);
+        return *this;
+    };
+private:
+    PwmOut _redpin;
+    PwmOut _greenpin;
+    PwmOut _bluepin;
+};
+ 
+RGBLed::RGBLed (PinName redpin, PinName greenpin, PinName bluepin)
+    : _redpin(redpin), _greenpin(greenpin), _bluepin(bluepin)
+{
+    //50Hz PWM clock default a bit too low, go to 2000Hz (less flicker)
+    _redpin.period(0.0005);
+}
+ 
+void RGBLed::write(float red,float green, float blue)
+{
+    _redpin = red;
+    _greenpin = green;
+    _bluepin = blue;
+}
+void RGBLed::write(LEDColor c)
+{
+    _redpin = c.red;
+    _greenpin = c.green;
+    _bluepin = c.blue;
+}
+ 
+////classes could be moved to include file
+// 
+// 
+////Setup RGB led using PWM pins and class
+//RGBLed myRGBled(p23,p22,p21); //RGB PWM pins
+// 
+////setup some color objects in flash using const's
+//const LEDColor red(1.0,0.0,0.0);
+//const LEDColor green(0.0,0.2,0.0);
+////brighter green LED is scaled down to same as red and
+////blue LED outputs on Sparkfun RGBLED
+//const LEDColor blue(0.0,0.0,1.0);
+//const LEDColor yellow(1.0,0.2,0.0);
+//const LEDColor white(1.0,0.2,1.0);
+// 
+//int main()
+//{
+//    while(1) {
+//        myRGBled = red;
+//        //myRGBled.write(1.0,0.0,0,0); //red
+//        wait(2.0);
+//        myRGBled = green;
+//        //myRGBled.write(0.0,1.0,0.0); //green
+//        wait(2.0);
+//        myRGBled = blue;
+//        //myRGBled.write(0.0,0.0,1.0); //blue
+//        wait(2.0);
+//        myRGBled = red + green; //yellow = red + green
+//        wait(2.0);
+//        //white with a slow fade to black dimming effect
+//        for (float brightness=1.0; brightness>=0.0001; brightness*=0.99) {
+//            myRGBled = white * brightness;
+//            wait(0.005);
+//        }
+//        wait(2.0);
+//    }
+//}
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