IDD Fall 2015 / Mbed 2 deprecated idd_cpp_rgbled2

Example of a custom class for any RGB LED - not just the on-board LED.

Dependencies:   mbed

main.cpp@0:0ca7f9aff195, 2015-09-23 (annotated)

Committer:
bjo3rn
Date:
Wed Sep 23 20:36:10 2015 +0000
Revision:
0:0ca7f9aff195
initial commit

Who changed what in which revision?

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bjo3rn 0:0ca7f9aff195 1 #include "mbed.h"
bjo3rn 0:0ca7f9aff195 2
bjo3rn 0:0ca7f9aff195 3 /********************
bjo3rn 0:0ca7f9aff195 4 * Interactive Device Design Custom Class Demonstration
bjo3rn 0:0ca7f9aff195 5 * V2 - Improved version without re-creating PwmOut objects at every call
bjo3rn 0:0ca7f9aff195 6 * bjoern@eecs.berkeley.edu, 9/23/2015
bjo3rn 0:0ca7f9aff195 7 ********************/
bjo3rn 0:0ca7f9aff195 8
bjo3rn 0:0ca7f9aff195 9
bjo3rn 0:0ca7f9aff195 10 class RGBLed {
bjo3rn 0:0ca7f9aff195 11 public:
bjo3rn 0:0ca7f9aff195 12
bjo3rn 0:0ca7f9aff195 13 // constructor - same name as class - this one takes pin names
bjo3rn 0:0ca7f9aff195 14 RGBLed (PinName redPN, PinName greenPN, PinName bluePN) {
bjo3rn 0:0ca7f9aff195 15 //create new PwmOut objects
bjo3rn 0:0ca7f9aff195 16 redPin = new PwmOut(redPN);
bjo3rn 0:0ca7f9aff195 17 greenPin = new PwmOut (greenPN);
bjo3rn 0:0ca7f9aff195 18 bluePin = new PwmOut (bluePN);
bjo3rn 0:0ca7f9aff195 19 }
bjo3rn 0:0ca7f9aff195 20
bjo3rn 0:0ca7f9aff195 21 // set red, green, blue values of on-board LED
bjo3rn 0:0ca7f9aff195 22 // r,g,b range from 0.0(off) to 1.0(full on)
bjo3rn 0:0ca7f9aff195 23 void setColor(float r, float g, float b){
bjo3rn 0:0ca7f9aff195 24 redPin->write(1.0-r); //invert: PWM 0=on, 1.0=off
bjo3rn 0:0ca7f9aff195 25 greenPin->write(1.0-g);
bjo3rn 0:0ca7f9aff195 26 bluePin->write(1.0-b);
bjo3rn 0:0ca7f9aff195 27 }
bjo3rn 0:0ca7f9aff195 28 private:
bjo3rn 0:0ca7f9aff195 29 RGBLed() {} // cannot use this from the outside because it is private
bjo3rn 0:0ca7f9aff195 30
bjo3rn 0:0ca7f9aff195 31 PwmOut* redPin; // we don't know which pins these will be connected to yet,
bjo3rn 0:0ca7f9aff195 32 PwmOut* bluePin; // so only create pointers and allocate the objects later
bjo3rn 0:0ca7f9aff195 33 PwmOut* greenPin; // inside the constructor
bjo3rn 0:0ca7f9aff195 34 };
bjo3rn 0:0ca7f9aff195 35
bjo3rn 0:0ca7f9aff195 36
bjo3rn 0:0ca7f9aff195 37 RGBLed myLed(LED_RED,LED_GREEN,LED_BLUE); //declare a variable of our new class type and pass in pin names
bjo3rn 0:0ca7f9aff195 38
bjo3rn 0:0ca7f9aff195 39 int main() {
bjo3rn 0:0ca7f9aff195 40 while(1) {
bjo3rn 0:0ca7f9aff195 41 myLed.setColor(0.0, 0.0, 1.0); //call the member function setColor() - this is blue
bjo3rn 0:0ca7f9aff195 42 wait(0.2);
bjo3rn 0:0ca7f9aff195 43 myLed.setColor(1.0, 1.0, 1.0); //this is white
bjo3rn 0:0ca7f9aff195 44 wait(0.2);
bjo3rn 0:0ca7f9aff195 45 }
bjo3rn 0:0ca7f9aff195 46 }