Diff: main.cpp

Revision:

0:2ba57c4723ea

Child:

1:9654405c52f4

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Sep 26 12:35:57 2018 +0000
@@ -0,0 +1,46 @@
+#include "mbed.h"
+#include "math.h"
+
+PwmOut Led(D3);
+InterruptIn Brighter(D1);
+InterruptIn Dimmer(D0);
+Ticker checkTicker;
+
+volatile float DutyCycle = 0.2; // set start cycle percentage of 20% (this is free of choice)
+volatile float Percentage;
+
+void BrighterFcn()
+{
+    if (DutyCycle == 1.0) // check if duty cycle is already at max
+    {return;}
+    else 
+    {DutyCycle = DutyCycle + 0.025;} // raise duty cycle with 2.5%
+}
+
+void DimmerFcn()
+{
+    if (DutyCycle == 0.0) // check if duty cycle is already at minimum
+    {return;}
+    else 
+    {DutyCycle = DutyCycle - 0.025;}  // lower duty cycle with 2.5%
+}
+
+void CheckDutyCycle()
+{
+    Percentage = DutyCycle;
+}
+
+int main()
+{
+    float frequency = 10000; // 10 kHz
+    Led.period(1/frequency); // set fixed period
+    Brighter.rise(&BrighterFcn); //call function to raise dutycycle percentage if button is pressed and released
+    Dimmer.rise(&DimmerFcn); //call function to lower dutycycle percentage if button is pressed and released
+    checkTicker.attach(&CheckDutyCycle, 0.05); // call for percentage with 20 Hz to make the working smoother
+    
+        while (true) 
+        {
+        Led.write(Percentage);
+        wait(0.1f);
+        }
+}
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