ECE 4180 Lab 1 Part 3

Dependencies:   PinDetect mbed

Files at this revision

API Documentation at this revision

Comitter:
abraha2d
Date:
Tue Oct 09 00:33:50 2018 +0000
Commit message:
Save point

Changed in this revision

PinDetect.lib Show annotated file Show diff for this revision Revisions of this file
main.cpp Show annotated file Show diff for this revision Revisions of this file
mbed.bld Show annotated file Show diff for this revision Revisions of this file
diff -r 000000000000 -r d8abb9cdbd04 PinDetect.lib
--- /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
diff -r 000000000000 -r d8abb9cdbd04 main.cpp
--- /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);
+    }
+}
diff -r 000000000000 -r d8abb9cdbd04 mbed.bld
--- /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