Revision 3:e69a72de6877, committed 2015-05-18

Comitter:

huliyang

Date:

Mon May 18 14:24:51 2015 +0000

Parent:

2:617c7d2f754d

Commit message:

Use the edge-triggered Debouncer instead of slow polling.

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Debouncer.lib	Mon May 18 14:24:51 2015 +0000
@@ -0,0 +1,1 @@
+http://developer.mbed.org/users/huliyang/code/Debouncer/#7f2f00805d41

--- a/Pulsator.lib	Wed Apr 29 01:54:25 2015 +0000
+++ b/Pulsator.lib	Mon May 18 14:24:51 2015 +0000
@@ -1,1 +1,1 @@
-http://developer.mbed.org/users/huliyang/code/Pulsator/#b40252f5fee7
+http://developer.mbed.org/users/huliyang/code/Pulsator/#1ade8e824939

--- a/main.cpp	Wed Apr 29 01:54:25 2015 +0000
+++ b/main.cpp	Mon May 18 14:24:51 2015 +0000
@@ -1,10 +1,10 @@
 #include <mbed.h>
-#include <DigitalIn.h>
+#include <Debouncer.h>
 #include <Pulsator.h>
 #include <USBKeyboard.h>
 
 // ACTIVE LOW
-#define PI_BUTTON P0_7
+#define PI_BUTTON P0_1
 #define PO_LED P1_15
 
 #define BUTT_DN_KEY '1'
@@ -15,26 +15,31 @@
 #define LED_PERIOD_DN 0.25f
 #define LED_PERIOD_UP 2.0f
 
-DigitalIn butt(PI_BUTTON, PullUp);
-USBKeyboard kbd;
-Pulsator led(PO_LED);
+static Debouncer butt(PI_BUTTON, PullUp);
+static USBKeyboard kbd;
+static Pulsator led(PO_LED);
+
+static void butt_fall(void)
+{
+    kbd.keyCode(BUTT_DN_KEY, BUTT_DN_MOD);
+    led.period(LED_PERIOD_DN);
+}
+
+static void butt_rise(void)
+{
+    kbd.keyCode(BUTT_UP_KEY, BUTT_UP_MOD);
+    led.period(LED_PERIOD_UP);
+}
 
 static float flashing(float x)
-    { return x < 0.125f || x >= 0.25f && x < 0.375f ? 1.0f : 0.0f; }
+{ return x < 0.125f || x >= 0.25f && x < 0.375f ? 1.0f : 0.0f; }
 
-#define BRIEFLY 0.125f
 int main(void)
 {
     led.active_high(false).fun(&flashing).period(LED_PERIOD_UP) = true;
-    while(!kbd.configured()) wait(BRIEFLY);
+    while(!kbd.configured()) wait(0.125f);
     led.fun(NULL);
+    butt.attach_fall(&butt_fall).attach_rise(&butt_rise);
 
-    for(bool now = butt; ; wait(BRIEFLY))
-    {
-        if(now == butt) continue;
-        now = !now;
-        now ? kbd.keyCode(BUTT_UP_KEY, BUTT_UP_MOD)
-            : kbd.keyCode(BUTT_DN_KEY, BUTT_DN_MOD);
-        led.period(now ? LED_PERIOD_UP : LED_PERIOD_DN);
-    }
+    while(1) wait(1.0f);
 }