Kevin Abraham
ECE 4180 Lab 1 Part 3
Revision 0:d8abb9cdbd04, committed 2018-10-09
- Comitter:
- abraha2d
- Date:
- Tue Oct 09 00:33:50 2018 +0000
- Commit message:
- Save point
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/PinDetect.lib Tue Oct 09 00:33:50 2018 +0000 @@ -0,0 +1,1 @@ +http://os.mbed.com/users/AjK/code/PinDetect/#cb3afc45028b
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Tue Oct 09 00:33:50 2018 +0000
@@ -0,0 +1,82 @@
+#include "mbed.h"
+#include "PinDetect.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);
+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;
+}
+
+//Setup RGB led using PWM pins and class
+RGBLed myRGBled(p21,p22,p23); //RGB PWM pins
+
+DigitalIn r(p24);
+DigitalIn g(p25);
+DigitalIn b(p26);
+
+PinDetect pb1(p8);
+PinDetect pb2(p7);
+
+// Global pwm variable
+float volatile pwm=1.0f;
+
+// Callback routine is interrupt activated by a debounced pb1 hit
+void pb1_hit_callback (void)
+{
+ pwm -= 0.1f;
+ if (pwm < 0.0f) {
+ pwm = 0.0f;
+ }
+}
+
+// Callback routine is interrupt activated by a debounced pb2 hit
+void pb2_hit_callback (void)
+{
+ pwm += 0.1f;
+ if (pwm > 1.0f) {
+ pwm = 1.0f;
+ }
+}
+
+int main()
+{
+ r.mode(PullUp);
+ g.mode(PullUp);
+ b.mode(PullUp);
+
+ // Use internal pullups for pushbutton
+ pb1.mode(PullUp);
+ pb2.mode(PullUp);
+ // Delay for initial pullup to take effect
+ wait(.01);
+ // Setup Interrupt callback functions for a pb hit
+ pb1.attach_deasserted(&pb1_hit_callback);
+ pb2.attach_deasserted(&pb2_hit_callback);
+ // Start sampling pb inputs using interrupts
+ pb1.setSampleFrequency();
+ pb2.setSampleFrequency();
+
+ while(1) {
+ myRGBled.write(!r*pwm,!g*pwm,!b*pwm);
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Tue Oct 09 00:33:50 2018 +0000 @@ -0,0 +1,1 @@ +https://os.mbed.com/users/mbed_official/code/mbed/builds/e95d10626187 \ No newline at end of file