main.cpp

00001 /* @file MultiKey.cpp
00002 || @vesion 1.2 
00003 || @modified by Istvan Cserny 
00004 || @contact https://developer.mbed.org/users/icserny/
00005 || @version 1.1
00006 || @modified by Diego (http://hotboards.org)
00007 || @version 1.0
00008 || @author Mark Stanley
00009 || @contact mstanley@technologist.com
00010 ||
00011 || @description
00012 || | The latest version, 3.0, of the keypad library supports up to 10
00013 || | active keys all being pressed at the same time. This sketch is an
00014 || | example of how you can get multiple key presses from a keypad or
00015 || | keyboard.
00016 
00017 */
00018 #include "mbed.h"
00019 #include "Hotboards_keypad.h"
00020 #include <string>
00021 
00022 using std::string;
00023 
00024 // Defines the keys array with it's respective number of rows & cols,
00025 // and with the value of each key
00026 char keys[ 4 ][ 4 ] =
00027 {
00028     { '1' , '2' , '3' , 'A' },
00029     { '4' , '5' , '6' , 'B' },
00030     { '7' , '8' , '9' , 'C' },
00031     { '*' , '0' , '#' , 'D' }
00032 };
00033 
00034 // Defines the pins connected to the rows
00035 DigitalInOut rowPins[ 4 ] = { PTB8 , PTB9 , PTB10 , PTB11 };
00036 // Defines the pins connected to the cols
00037 DigitalInOut colPins[ 4 ] = { PTE2 , PTE3 , PTE4 , PTE5 };
00038 
00039 // Creates a new keyboard with the values entered before
00040 Keypad kpd( makeKeymap( keys ) , rowPins , colPins , 4 , 4 );
00041 
00042 // Configures the serial port
00043 Serial pc( USBTX , USBRX );
00044 
00045 int i;
00046 
00047 int main()
00048 {
00049     string msg;
00050     while(1)
00051     {
00052         // Fills kpd.key[ ] array with up-to 10 active keys.
00053         // Returns true if there are ANY active keys.        
00054         if( kpd.getKeys( ) )
00055         {
00056             // Scan the whole key list.
00057             for( i = 0 ; i < LIST_MAX ; i++ )
00058             {
00059                 // Only find keys that have changed state.
00060                 if( kpd.key[ i ].stateChanged )
00061                 {
00062                     // Report active key state : IDLE, PRESSED, HOLD, or RELEASED
00063                     switch( kpd.key[ i ].kstate )
00064                     {
00065                         case PRESSED:
00066                             msg = " PRESSED. ";
00067                             break;
00068                         case HOLD:
00069                             msg = " HOLD. ";
00070                             break;
00071                         case RELEASED:
00072                             msg = " RELEASED. ";
00073                             break;
00074                         case IDLE:
00075                             msg = " IDLE. ";
00076                             break;
00077                         default:
00078                             break;
00079                     }
00080                     // Print the current state of the key pressed
00081                     pc.printf( "Key " );              
00082                     pc.printf( "%c" , kpd.key[ i ].kchar );
00083                     pc.printf( "%s" , msg.c_str() );
00084                     pc.printf( "\n\r" );
00085                 }
00086             }
00087         }
00088     }
00089 }