Diff: BlinkLed.cpp

Revision:

0:a55a3351317d

Child:

1:54071e781f77

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/BlinkLed.cpp	Sat Sep 01 04:02:02 2012 +0000
@@ -0,0 +1,48 @@
+#include "BlinkLed.h"
+    
+BlinkLed::BlinkLed(PinName pin, float dutyChangeStep) :
+led(pin),
+dutyChangeStep(dutyChangeStep),
+pause(true),
+thread(0)
+{
+}
+
+BlinkLed::~BlinkLed()
+{
+}
+
+void BlinkLed::startBlink()
+{
+    pause = false;
+    if(thread == 0)
+    {
+        thread = new Thread(blink, this, osPriorityNormal, 128, NULL);
+    }
+}
+
+void BlinkLed::finishBlink()
+{
+    pause = true;
+}
+
+void BlinkLed::blink(void const *argument)
+{
+    BlinkLed* self = (BlinkLed*)argument;
+    
+    bool sign = false;
+    while (1)
+    {
+        if(self->pause)
+        {
+            self->led = 0.0F;
+        }
+        else
+        {
+            float brightness = self->led;
+            sign = (brightness <= 0.0F) ? true : (1.0F <= brightness) ? false : sign;
+            self->led = sign ? brightness + self->dutyChangeStep : brightness - self->dutyChangeStep;
+        }
+        Thread::wait(20);
+    }
+}