Roman Valencia
How to call functions when a key changes it's state
Dependencies: Hotboards_keypad mbed
Revision 0:a2b95a8cb722, committed 2016-03-08
- Comitter:
- RomanValenciaP
- Date:
- Tue Mar 08 20:46:03 2016 +0000
- Commit message:
- first release
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Hotboards_keypad.lib Tue Mar 08 20:46:03 2016 +0000 @@ -0,0 +1,1 @@ +http://developer.mbed.org/users/Hotboards/code/Hotboards_keypad/#e870110f753b
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Tue Mar 08 20:46:03 2016 +0000
@@ -0,0 +1,78 @@
+
+#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 );
+
+// For this example we will use the Nucleo LED1 on pin PA_5
+DigitalOut led1( LED1 );
+bool blink = false;
+bool ledPin_state;
+
+
+// Taking care of some special events.
+void kpdEvent( KeypadEvent key )
+{
+ switch( kpd.getState( ) )
+ {
+ case PRESSED:
+ if( key == '#' )
+ {
+ led1 = !led1;
+ ledPin_state = led1; // Remember LED state, lit or unlit.
+ }
+ break;
+ case RELEASED:
+ if( key == '*' )
+ {
+ led1 = ledPin_state;
+ blink = false; // Restore LED state from before it started blinking.
+ }
+ break;
+ case HOLD:
+ if( key == '*' )
+ {
+ blink = true; // Blink the LED when holding the * key.
+ }
+ break;
+ }
+}
+
+int main()
+{
+ led1 = 1; // Turn the LED on.
+ ledPin_state = led1; // Store initial LED state. HIGH when LED is on.
+ kpd.addEventListener( kpdEvent ); // Add an event listener for this keypad
+ while(1)
+ {
+ char key = kpd.getKey( );
+ if( key )
+ {
+ pc.printf( "%c" , key );
+ }
+ if( blink )
+ {
+ led1 = !led1; // Change the ledPin from Hi2Lo or Lo2Hi
+ wait_ms( 100 );
+ }
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Tue Mar 08 20:46:03 2016 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/87f2f5183dfb \ No newline at end of file