hobbielektronika / Mbed 2 deprecated 26_Hotboards_MultiKey

Sense multiple keypresses from a 4x4 keypad

Dependencies:   Hotboards_keypad mbed

Fork of Hotboards_MultiKey by Hotboards MX

main.cpp@1:bd23ec9647fd, 2016-03-08 (annotated)

Committer:
Hotboards
Date:
Tue Mar 08 21:19:09 2016 +0000
Revision:
1:bd23ec9647fd
Parent:
0:d39ee4a4aec6
Child:
2:5710f598e683
first release

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Hotboards 1:bd23ec9647fd 1 /* @file MultiKey.cpp
Hotboards 1:bd23ec9647fd 2 || @version 1.1
Hotboards 1:bd23ec9647fd 3 || @modified by Diego (http://hotboards.org)
Hotboards 1:bd23ec9647fd 4 || @version 1.0
Hotboards 1:bd23ec9647fd 5 || @author Mark Stanley
Hotboards 1:bd23ec9647fd 6 || @contact mstanley@technologist.com
Hotboards 1:bd23ec9647fd 7 ||
Hotboards 1:bd23ec9647fd 8 || @description
Hotboards 1:bd23ec9647fd 9 || | The latest version, 3.0, of the keypad library supports up to 10
Hotboards 1:bd23ec9647fd 10 || | active keys all being pressed at the same time. This sketch is an
Hotboards 1:bd23ec9647fd 11 || | example of how you can get multiple key presses from a keypad or
Hotboards 1:bd23ec9647fd 12 || | keyboard.
RomanValenciaP 0:d39ee4a4aec6 13
Hotboards 1:bd23ec9647fd 14 */
RomanValenciaP 0:d39ee4a4aec6 15 #include "mbed.h"
RomanValenciaP 0:d39ee4a4aec6 16 #include "Hotboards_keypad.h"
RomanValenciaP 0:d39ee4a4aec6 17 #include <string>
RomanValenciaP 0:d39ee4a4aec6 18
RomanValenciaP 0:d39ee4a4aec6 19 using std::string;
RomanValenciaP 0:d39ee4a4aec6 20
RomanValenciaP 0:d39ee4a4aec6 21 // Defines the keys array with it's respective number of rows & cols,
RomanValenciaP 0:d39ee4a4aec6 22 // and with the value of each key
RomanValenciaP 0:d39ee4a4aec6 23 char keys[ 4 ][ 4 ] =
RomanValenciaP 0:d39ee4a4aec6 24 {
RomanValenciaP 0:d39ee4a4aec6 25 { '1' , '2' , '3' , 'A' },
RomanValenciaP 0:d39ee4a4aec6 26 { '4' , '5' , '6' , 'B' },
RomanValenciaP 0:d39ee4a4aec6 27 { '7' , '8' , '9' , 'C' },
RomanValenciaP 0:d39ee4a4aec6 28 { '*' , '0' , '#' , 'D' }
RomanValenciaP 0:d39ee4a4aec6 29 };
RomanValenciaP 0:d39ee4a4aec6 30
RomanValenciaP 0:d39ee4a4aec6 31 // Defines the pins connected to the rows
RomanValenciaP 0:d39ee4a4aec6 32 DigitalInOut rowPins[ 4 ] = { PA_6 , PA_7 , PB_6 , PC_7 };
RomanValenciaP 0:d39ee4a4aec6 33 // Defines the pins connected to the cols
RomanValenciaP 0:d39ee4a4aec6 34 DigitalInOut colPins[ 4 ] = { PA_8 , PB_10 , PB_4 , PB_5 };
RomanValenciaP 0:d39ee4a4aec6 35
RomanValenciaP 0:d39ee4a4aec6 36 // Creates a new keyboard with the values entered before
RomanValenciaP 0:d39ee4a4aec6 37 Keypad kpd( makeKeymap( keys ) , rowPins , colPins , 4 , 4 );
RomanValenciaP 0:d39ee4a4aec6 38
RomanValenciaP 0:d39ee4a4aec6 39 // Configures the serial port
RomanValenciaP 0:d39ee4a4aec6 40 Serial pc( USBTX , USBRX );
RomanValenciaP 0:d39ee4a4aec6 41
RomanValenciaP 0:d39ee4a4aec6 42 int i;
RomanValenciaP 0:d39ee4a4aec6 43
RomanValenciaP 0:d39ee4a4aec6 44 int main()
RomanValenciaP 0:d39ee4a4aec6 45 {
RomanValenciaP 0:d39ee4a4aec6 46 string msg;
RomanValenciaP 0:d39ee4a4aec6 47 while(1)
RomanValenciaP 0:d39ee4a4aec6 48 {
RomanValenciaP 0:d39ee4a4aec6 49 // Fills kpd.key[ ] array with up-to 10 active keys.
RomanValenciaP 0:d39ee4a4aec6 50 // Returns true if there are ANY active keys.
RomanValenciaP 0:d39ee4a4aec6 51 if( kpd.getKeys( ) )
RomanValenciaP 0:d39ee4a4aec6 52 {
RomanValenciaP 0:d39ee4a4aec6 53 // Scan the whole key list.
RomanValenciaP 0:d39ee4a4aec6 54 for( i = 0 ; i <= LIST_MAX ; i++ )
RomanValenciaP 0:d39ee4a4aec6 55 {
RomanValenciaP 0:d39ee4a4aec6 56 // Only find keys that have changed state.
RomanValenciaP 0:d39ee4a4aec6 57 if( kpd.key[ i ].stateChanged )
RomanValenciaP 0:d39ee4a4aec6 58 {
RomanValenciaP 0:d39ee4a4aec6 59 // Report active key state : IDLE, PRESSED, HOLD, or RELEASED
RomanValenciaP 0:d39ee4a4aec6 60 switch( kpd.key[ i ].kstate )
RomanValenciaP 0:d39ee4a4aec6 61 {
RomanValenciaP 0:d39ee4a4aec6 62 case PRESSED:
RomanValenciaP 0:d39ee4a4aec6 63 msg = " PRESSED. ";
RomanValenciaP 0:d39ee4a4aec6 64 break;
RomanValenciaP 0:d39ee4a4aec6 65 case HOLD:
RomanValenciaP 0:d39ee4a4aec6 66 msg = " HOLD. ";
RomanValenciaP 0:d39ee4a4aec6 67 break;
RomanValenciaP 0:d39ee4a4aec6 68 case RELEASED:
RomanValenciaP 0:d39ee4a4aec6 69 msg = " RELEASED. ";
RomanValenciaP 0:d39ee4a4aec6 70 break;
RomanValenciaP 0:d39ee4a4aec6 71 case IDLE:
RomanValenciaP 0:d39ee4a4aec6 72 msg = " IDLE. ";
RomanValenciaP 0:d39ee4a4aec6 73 break;
RomanValenciaP 0:d39ee4a4aec6 74 default:
RomanValenciaP 0:d39ee4a4aec6 75 break;
RomanValenciaP 0:d39ee4a4aec6 76 }
RomanValenciaP 0:d39ee4a4aec6 77 // Print the current state of the key pressed
RomanValenciaP 0:d39ee4a4aec6 78 pc.printf( "Key " );
RomanValenciaP 0:d39ee4a4aec6 79 pc.printf( "%c" , kpd.key[ i ].kchar );
RomanValenciaP 0:d39ee4a4aec6 80 pc.printf( "%s" , msg.c_str() );
RomanValenciaP 0:d39ee4a4aec6 81 pc.printf( "\n\r" );
RomanValenciaP 0:d39ee4a4aec6 82 }
RomanValenciaP 0:d39ee4a4aec6 83 }
RomanValenciaP 0:d39ee4a4aec6 84 }
RomanValenciaP 0:d39ee4a4aec6 85 }
RomanValenciaP 0:d39ee4a4aec6 86 }