Sense multiple keypresses from a 4x4 keypad
Dependencies: Hotboards_keypad mbed
Fork of Hotboards_MultiKey by
main.cpp@0:d39ee4a4aec6, 2016-03-08 (annotated)
- Committer:
- RomanValenciaP
- Date:
- Tue Mar 08 20:45:33 2016 +0000
- Revision:
- 0:d39ee4a4aec6
- Child:
- 1:bd23ec9647fd
first release
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
RomanValenciaP | 0:d39ee4a4aec6 | 1 | |
RomanValenciaP | 0:d39ee4a4aec6 | 2 | #include "mbed.h" |
RomanValenciaP | 0:d39ee4a4aec6 | 3 | #include "Hotboards_keypad.h" |
RomanValenciaP | 0:d39ee4a4aec6 | 4 | #include <string> |
RomanValenciaP | 0:d39ee4a4aec6 | 5 | |
RomanValenciaP | 0:d39ee4a4aec6 | 6 | using std::string; |
RomanValenciaP | 0:d39ee4a4aec6 | 7 | |
RomanValenciaP | 0:d39ee4a4aec6 | 8 | // Defines the keys array with it's respective number of rows & cols, |
RomanValenciaP | 0:d39ee4a4aec6 | 9 | // and with the value of each key |
RomanValenciaP | 0:d39ee4a4aec6 | 10 | char keys[ 4 ][ 4 ] = |
RomanValenciaP | 0:d39ee4a4aec6 | 11 | { |
RomanValenciaP | 0:d39ee4a4aec6 | 12 | { '1' , '2' , '3' , 'A' }, |
RomanValenciaP | 0:d39ee4a4aec6 | 13 | { '4' , '5' , '6' , 'B' }, |
RomanValenciaP | 0:d39ee4a4aec6 | 14 | { '7' , '8' , '9' , 'C' }, |
RomanValenciaP | 0:d39ee4a4aec6 | 15 | { '*' , '0' , '#' , 'D' } |
RomanValenciaP | 0:d39ee4a4aec6 | 16 | }; |
RomanValenciaP | 0:d39ee4a4aec6 | 17 | |
RomanValenciaP | 0:d39ee4a4aec6 | 18 | // Defines the pins connected to the rows |
RomanValenciaP | 0:d39ee4a4aec6 | 19 | DigitalInOut rowPins[ 4 ] = { PA_6 , PA_7 , PB_6 , PC_7 }; |
RomanValenciaP | 0:d39ee4a4aec6 | 20 | // Defines the pins connected to the cols |
RomanValenciaP | 0:d39ee4a4aec6 | 21 | DigitalInOut colPins[ 4 ] = { PA_8 , PB_10 , PB_4 , PB_5 }; |
RomanValenciaP | 0:d39ee4a4aec6 | 22 | |
RomanValenciaP | 0:d39ee4a4aec6 | 23 | // Creates a new keyboard with the values entered before |
RomanValenciaP | 0:d39ee4a4aec6 | 24 | Keypad kpd( makeKeymap( keys ) , rowPins , colPins , 4 , 4 ); |
RomanValenciaP | 0:d39ee4a4aec6 | 25 | |
RomanValenciaP | 0:d39ee4a4aec6 | 26 | // Configures the serial port |
RomanValenciaP | 0:d39ee4a4aec6 | 27 | Serial pc( USBTX , USBRX ); |
RomanValenciaP | 0:d39ee4a4aec6 | 28 | |
RomanValenciaP | 0:d39ee4a4aec6 | 29 | int i; |
RomanValenciaP | 0:d39ee4a4aec6 | 30 | |
RomanValenciaP | 0:d39ee4a4aec6 | 31 | int main() |
RomanValenciaP | 0:d39ee4a4aec6 | 32 | { |
RomanValenciaP | 0:d39ee4a4aec6 | 33 | string msg; |
RomanValenciaP | 0:d39ee4a4aec6 | 34 | while(1) |
RomanValenciaP | 0:d39ee4a4aec6 | 35 | { |
RomanValenciaP | 0:d39ee4a4aec6 | 36 | // Fills kpd.key[ ] array with up-to 10 active keys. |
RomanValenciaP | 0:d39ee4a4aec6 | 37 | // Returns true if there are ANY active keys. |
RomanValenciaP | 0:d39ee4a4aec6 | 38 | if( kpd.getKeys( ) ) |
RomanValenciaP | 0:d39ee4a4aec6 | 39 | { |
RomanValenciaP | 0:d39ee4a4aec6 | 40 | // Scan the whole key list. |
RomanValenciaP | 0:d39ee4a4aec6 | 41 | for( i = 0 ; i <= LIST_MAX ; i++ ) |
RomanValenciaP | 0:d39ee4a4aec6 | 42 | { |
RomanValenciaP | 0:d39ee4a4aec6 | 43 | // Only find keys that have changed state. |
RomanValenciaP | 0:d39ee4a4aec6 | 44 | if( kpd.key[ i ].stateChanged ) |
RomanValenciaP | 0:d39ee4a4aec6 | 45 | { |
RomanValenciaP | 0:d39ee4a4aec6 | 46 | // Report active key state : IDLE, PRESSED, HOLD, or RELEASED |
RomanValenciaP | 0:d39ee4a4aec6 | 47 | switch( kpd.key[ i ].kstate ) |
RomanValenciaP | 0:d39ee4a4aec6 | 48 | { |
RomanValenciaP | 0:d39ee4a4aec6 | 49 | case PRESSED: |
RomanValenciaP | 0:d39ee4a4aec6 | 50 | msg = " PRESSED. "; |
RomanValenciaP | 0:d39ee4a4aec6 | 51 | break; |
RomanValenciaP | 0:d39ee4a4aec6 | 52 | case HOLD: |
RomanValenciaP | 0:d39ee4a4aec6 | 53 | msg = " HOLD. "; |
RomanValenciaP | 0:d39ee4a4aec6 | 54 | break; |
RomanValenciaP | 0:d39ee4a4aec6 | 55 | case RELEASED: |
RomanValenciaP | 0:d39ee4a4aec6 | 56 | msg = " RELEASED. "; |
RomanValenciaP | 0:d39ee4a4aec6 | 57 | break; |
RomanValenciaP | 0:d39ee4a4aec6 | 58 | case IDLE: |
RomanValenciaP | 0:d39ee4a4aec6 | 59 | msg = " IDLE. "; |
RomanValenciaP | 0:d39ee4a4aec6 | 60 | break; |
RomanValenciaP | 0:d39ee4a4aec6 | 61 | default: |
RomanValenciaP | 0:d39ee4a4aec6 | 62 | break; |
RomanValenciaP | 0:d39ee4a4aec6 | 63 | } |
RomanValenciaP | 0:d39ee4a4aec6 | 64 | // Print the current state of the key pressed |
RomanValenciaP | 0:d39ee4a4aec6 | 65 | pc.printf( "Key " ); |
RomanValenciaP | 0:d39ee4a4aec6 | 66 | pc.printf( "%c" , kpd.key[ i ].kchar ); |
RomanValenciaP | 0:d39ee4a4aec6 | 67 | pc.printf( "%s" , msg.c_str() ); |
RomanValenciaP | 0:d39ee4a4aec6 | 68 | pc.printf( "\n\r" ); |
RomanValenciaP | 0:d39ee4a4aec6 | 69 | } |
RomanValenciaP | 0:d39ee4a4aec6 | 70 | } |
RomanValenciaP | 0:d39ee4a4aec6 | 71 | } |
RomanValenciaP | 0:d39ee4a4aec6 | 72 | } |
RomanValenciaP | 0:d39ee4a4aec6 | 73 | } |