Diff: rgb_buttons/main.cpp

Revision:

0:6a73d3dc037e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rgb_buttons/main.cpp	Mon Jul 28 20:29:28 2014 +0000
@@ -0,0 +1,71 @@
+#include "mbed.h"
+
+// Define buttons
+InterruptIn button_red(p5);
+InterruptIn button_green(p6);
+InterruptIn button_blue(p7);
+
+// Define LED colors
+PwmOut led_red(p21);
+PwmOut led_green(p22);
+PwmOut led_blue(p23);
+
+// Interrupt Service Routine to increment the red color
+void inc_red() {
+    
+    float pwm;
+    
+    // Read in current PWM value and increment it
+    pwm = led_red.read();
+    pwm += 0.1f;
+    if (pwm > 1.0f) {
+        pwm = 0.0f;
+    }
+    led_red.write(pwm);
+}
+
+// Interrupt Service Routine to increment the green color
+void inc_green() {
+    
+    float pwm;
+    
+    // Read in current PWM value and increment it
+    pwm = led_green.read();
+    pwm += 0.1f;
+    if (pwm > 1.0f) {
+        pwm = 0.0f;
+    }
+    led_green.write(pwm);
+}
+
+// Interrupt Service Routine to increment the blue color
+void inc_blue() {
+    
+    float pwm;
+    
+    // Read in current PWM value and increment it
+    pwm = led_blue.read();
+    pwm += 0.1f;
+    if (pwm > 1.0f) {
+        pwm = 0.0f;
+    }
+    led_blue.write(pwm);
+}
+
+// Main loop
+int main() {
+    
+    // Initialize all LED colors as off
+    led_red.write(0.0f);
+    led_green.write(0.0f);
+    led_blue.write(0.0f);
+    
+    // Define three interrupts - one for each color
+    button_red.fall(&inc_red);
+    button_green.fall(&inc_green);
+    button_blue.fall(&inc_blue);
+    
+    // Do nothing! We wait for an interrupt to happen
+    while(1) {
+    }
+}
\ No newline at end of file