Revision 3:ec275829202f, committed 2018-01-25

Comitter:

novinfard

Date:

Thu Jan 25 17:38:44 2018 +0000

Parent:

2:cd1fe8c29793

Commit message:

Initial Commit

Changed in this revision

diff -r cd1fe8c29793 -r ec275829202f main.cpp
--- a/main.cpp	Tue Jan 16 18:02:44 2018 +0000
+++ b/main.cpp	Thu Jan 25 17:38:44 2018 +0000
@@ -1,16 +1,12 @@
 #include "mbed.h"
 
-// Labs 2: Example program for polling an input
-// --------------------------------------------
-// The program uses a thread to poll a digital input
-//   - The thread monitors the position of the button
-//   - When the button transitions up and down, a press event is signaled 
-//   - Button bounce is guarded against
-// A second thread (the default one) checks for the press event and toggles the LED
+// Labs 2:  polling and rate change by button
 
 DigitalIn b1(PTD0, PullUp);
 DigitalOut led(LED1);
 
+double rate = 100;
+
 Thread pollT ; // thread to poll
 volatile int pressEvent = 0 ;  // Variabe set by the polling thread
 
@@ -51,13 +47,47 @@
  */
 int main() {
     led = 1 ;  // Initially off
+    int cycle = 1; // cycle of 100 waiting
+    int changeCycle = 2;
     pollT.start(callback(polling));
 
     while(true) {
         if (pressEvent) {
             pressEvent = 0 ; // clear the event variable
-            led = !led ;
+
+            switch (changeCycle) {
+                case 2 :
+                    changeCycle = 4 ;
+                    break ;
+                case 4 :
+                    changeCycle = 6 ;
+                    break ;
+                case 6 :
+                    changeCycle = 8 ;
+                    break ;
+                case 8 :
+                    changeCycle = 10 ;
+                    break ;
+                case 10 :
+                    changeCycle = 2 ;
+                    break ;
+            }
+            cycle = 1;      
         }
+        
+
+        if(cycle == changeCycle) {
+           if(led == 1) {
+                led = 0;
+            } else if (led == 0) {
+                led = 1;   
+            }
+           
+           cycle = 1; // reset the cycle
+        } else {            
+            cycle = cycle + 1; // go to the next cycle
+        }
+        
         Thread::wait(100) ;
     }
 }
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