Diff: main.cpp

Revision:

0:4b3d27b81086

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Mar 08 20:43:11 2016 +0000
@@ -0,0 +1,71 @@
+
+#include "mbed.h"
+#include "Hotboards_keypad.h"
+
+// Defines the keys array with it's respective number of rows & cols,
+// and with the value of each key
+char keys[ 4 ][ 4 ] =
+{
+    { '1' , '2' , '3' , 'A' },
+    { '4' , '5' , '6' , 'B' },
+    { '7' , '8' , '9' , 'C' },
+    { '*' , '0' , '#' , 'D' }
+};
+
+// Defines the pins connected to the rows
+DigitalInOut rowPins[ 4 ] = { PA_6 , PA_7 , PB_6 , PC_7 };
+// Defines the pins connected to the cols
+DigitalInOut colPins[ 4 ] = { PA_8 , PB_10 , PB_4 , PB_5 };
+
+// Creates a new keyboard with the values entered before
+Keypad kpd( makeKeymap( keys ) , rowPins , colPins , 4 , 4 );
+
+// Configures the serial port
+Serial pc( USBTX , USBRX );
+
+//
+int loopCount = 0;
+int timer_t = 0;
+
+// Configures a timer
+Timer t;
+
+int main()
+{
+    // Starts the timer
+    t.start( );
+    pc.printf( "Press any key: ");
+    
+
+    // Try playing with different debounceTime settings to see how it affects
+    // the number of times per second your loop will run. The library prevents
+    // setting it to anything below 1 millisecond.
+    kpd.setDebounceTime ( 100 ); // setDebouncetime( ms );
+    while(1)
+    {
+        // Poll the keypad to look for any activation
+        char key = kpd.getKey( );
+        
+        // Reports the number of times through the loop in 1 second. This will give
+        // you a relative idea of just how much the debounceTime has changed the
+        // speed of your code. If you set a high debounceTime your loopCount will
+        // look good but your keypresses will start to feel sluggish.        
+        if(( t.read_ms( ) - timer_t ) > 1000 )
+        {
+            pc.printf( "Your loop code ran " );
+            pc.printf( "%d" , loopCount );
+            pc.printf( " times over the last second" );
+            loopCount = 0;
+            pc.printf( "\n\r" );
+            timer_t = t.read_ms( );
+        }
+        loopCount ++;
+        
+        // If any key was pressed
+        if( key )
+        {
+            // Display the key pressed on serial port
+            pc.printf( "%c" , key );
+        }
+    }
+}