Roman Valencia / Mbed 2 deprecated EventKeypad

How to call functions when a key changes it's state

Dependencies:   Hotboards_keypad mbed

main.cpp@0:a2b95a8cb722, 2016-03-08 (annotated)

Committer:
RomanValenciaP
Date:
Tue Mar 08 20:46:03 2016 +0000
Revision:
0:a2b95a8cb722
first release

Who changed what in which revision?

UserRevisionLine numberNew contents of line
RomanValenciaP 0:a2b95a8cb722 1
RomanValenciaP 0:a2b95a8cb722 2 #include "mbed.h"
RomanValenciaP 0:a2b95a8cb722 3 #include "Hotboards_keypad.h"
RomanValenciaP 0:a2b95a8cb722 4
RomanValenciaP 0:a2b95a8cb722 5 // Defines the keys array with it's respective number of rows & cols,
RomanValenciaP 0:a2b95a8cb722 6 // and with the value of each key
RomanValenciaP 0:a2b95a8cb722 7 char keys[ 4 ][ 4 ] =
RomanValenciaP 0:a2b95a8cb722 8 {
RomanValenciaP 0:a2b95a8cb722 9 { '1' , '2' , '3' , 'A' },
RomanValenciaP 0:a2b95a8cb722 10 { '4' , '5' , '6' , 'B' },
RomanValenciaP 0:a2b95a8cb722 11 { '7' , '8' , '9' , 'C' },
RomanValenciaP 0:a2b95a8cb722 12 { '*' , '0' , '#' , 'D' }
RomanValenciaP 0:a2b95a8cb722 13 };
RomanValenciaP 0:a2b95a8cb722 14
RomanValenciaP 0:a2b95a8cb722 15 // Defines the pins connected to the rows
RomanValenciaP 0:a2b95a8cb722 16 DigitalInOut rowPins[ 4 ] = { PA_6 , PA_7 , PB_6 , PC_7 };
RomanValenciaP 0:a2b95a8cb722 17 // Defines the pins connected to the cols
RomanValenciaP 0:a2b95a8cb722 18 DigitalInOut colPins[ 4 ] = { PA_8 , PB_10 , PB_4 , PB_5 };
RomanValenciaP 0:a2b95a8cb722 19
RomanValenciaP 0:a2b95a8cb722 20 // Creates a new keyboard with the values entered before
RomanValenciaP 0:a2b95a8cb722 21 Keypad kpd( makeKeymap( keys ) , rowPins , colPins , 4 , 4 );
RomanValenciaP 0:a2b95a8cb722 22
RomanValenciaP 0:a2b95a8cb722 23 // Configures the serial port
RomanValenciaP 0:a2b95a8cb722 24 Serial pc( USBTX , USBRX );
RomanValenciaP 0:a2b95a8cb722 25
RomanValenciaP 0:a2b95a8cb722 26 // For this example we will use the Nucleo LED1 on pin PA_5
RomanValenciaP 0:a2b95a8cb722 27 DigitalOut led1( LED1 );
RomanValenciaP 0:a2b95a8cb722 28 bool blink = false;
RomanValenciaP 0:a2b95a8cb722 29 bool ledPin_state;
RomanValenciaP 0:a2b95a8cb722 30
RomanValenciaP 0:a2b95a8cb722 31
RomanValenciaP 0:a2b95a8cb722 32 // Taking care of some special events.
RomanValenciaP 0:a2b95a8cb722 33 void kpdEvent( KeypadEvent key )
RomanValenciaP 0:a2b95a8cb722 34 {
RomanValenciaP 0:a2b95a8cb722 35 switch( kpd.getState( ) )
RomanValenciaP 0:a2b95a8cb722 36 {
RomanValenciaP 0:a2b95a8cb722 37 case PRESSED:
RomanValenciaP 0:a2b95a8cb722 38 if( key == '#' )
RomanValenciaP 0:a2b95a8cb722 39 {
RomanValenciaP 0:a2b95a8cb722 40 led1 = !led1;
RomanValenciaP 0:a2b95a8cb722 41 ledPin_state = led1; // Remember LED state, lit or unlit.
RomanValenciaP 0:a2b95a8cb722 42 }
RomanValenciaP 0:a2b95a8cb722 43 break;
RomanValenciaP 0:a2b95a8cb722 44 case RELEASED:
RomanValenciaP 0:a2b95a8cb722 45 if( key == '*' )
RomanValenciaP 0:a2b95a8cb722 46 {
RomanValenciaP 0:a2b95a8cb722 47 led1 = ledPin_state;
RomanValenciaP 0:a2b95a8cb722 48 blink = false; // Restore LED state from before it started blinking.
RomanValenciaP 0:a2b95a8cb722 49 }
RomanValenciaP 0:a2b95a8cb722 50 break;
RomanValenciaP 0:a2b95a8cb722 51 case HOLD:
RomanValenciaP 0:a2b95a8cb722 52 if( key == '*' )
RomanValenciaP 0:a2b95a8cb722 53 {
RomanValenciaP 0:a2b95a8cb722 54 blink = true; // Blink the LED when holding the * key.
RomanValenciaP 0:a2b95a8cb722 55 }
RomanValenciaP 0:a2b95a8cb722 56 break;
RomanValenciaP 0:a2b95a8cb722 57 }
RomanValenciaP 0:a2b95a8cb722 58 }
RomanValenciaP 0:a2b95a8cb722 59
RomanValenciaP 0:a2b95a8cb722 60 int main()
RomanValenciaP 0:a2b95a8cb722 61 {
RomanValenciaP 0:a2b95a8cb722 62 led1 = 1; // Turn the LED on.
RomanValenciaP 0:a2b95a8cb722 63 ledPin_state = led1; // Store initial LED state. HIGH when LED is on.
RomanValenciaP 0:a2b95a8cb722 64 kpd.addEventListener( kpdEvent ); // Add an event listener for this keypad
RomanValenciaP 0:a2b95a8cb722 65 while(1)
RomanValenciaP 0:a2b95a8cb722 66 {
RomanValenciaP 0:a2b95a8cb722 67 char key = kpd.getKey( );
RomanValenciaP 0:a2b95a8cb722 68 if( key )
RomanValenciaP 0:a2b95a8cb722 69 {
RomanValenciaP 0:a2b95a8cb722 70 pc.printf( "%c" , key );
RomanValenciaP 0:a2b95a8cb722 71 }
RomanValenciaP 0:a2b95a8cb722 72 if( blink )
RomanValenciaP 0:a2b95a8cb722 73 {
RomanValenciaP 0:a2b95a8cb722 74 led1 = !led1; // Change the ledPin from Hi2Lo or Lo2Hi
RomanValenciaP 0:a2b95a8cb722 75 wait_ms( 100 );
RomanValenciaP 0:a2b95a8cb722 76 }
RomanValenciaP 0:a2b95a8cb722 77 }
RomanValenciaP 0:a2b95a8cb722 78 }