Kenji Arai / Keypad

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Dependents:   Keypad_input_OS2 Keypad_input

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Keypad Class Reference
Public Member Functions

Keypad Class Reference

#include <Keypad.h>

Public Member Functions

 Keypad (PinName kx, PinName ky, PinName kz, PinName ka, PinName kb, PinName kc, PinName kd)
 4x3 keypad interface:
 Keypad (PinName kx, PinName ky, PinName kz, PinName kw, PinName ka, PinName kb, PinName kc, PinName kd)
 4x4 keypad interface:
 Keypad (PinName kx, PinName ky, PinName kz, PinName kw, PinName ka, PinName kb, PinName kc, PinName kd, PinName ke)
 5x4 keypad interface:
 Keypad (PinName kx, PinName ky, PinName kz, PinName kw, PinName kv, PinName ka, PinName kb, PinName kc, PinName kd, PinName ke)
 5x5 keypad interface:
uint8_t read (void)
 Read key data into buffer.
bool read_state (uint8_t key_num)
 Read key ON/OFF state.

Detailed Description

 #include "mbed.h"
 #include "Keypad.h"

 //       output port  X  Y  Z
 //       Input A      *  0  #
 //       Input B      7  8  9
 //       Input C      4  5  6
 //       Input D      1  2  3
 //          X    Y   Z   A   B   C   D   OUT(XYZ), IN(ABCD)
 Keypad  key(D10, D9, D8, D7, D6, D5, D4);

 // define key number at main routine
 char *const key_table = "?*7410852#963";  // key_table[0]=? is not used!

 int main() {
     uint32_t key_num;
     while(true) {
         while ((key_num = key.read()) != 0){
             printf("%c\r\n", *(key_table + key_num));
         }
         wait(1.0);
     }
 }

Definition at line 99 of file Keypad.h.

Constructor & Destructor Documentation

Keypad ( PinName  kx,
PinName  ky,
PinName  kz,
PinName  ka,
PinName  kb,
PinName  kc,
PinName  kd 
)

4x3 keypad interface:

Parameters:
keyinput port A,B,C,D
keyoutput(scan) port X,Y,Z

Definition at line 27 of file Keypad.cpp.

Keypad ( PinName  kx,
PinName  ky,
PinName  kz,
PinName  kw,
PinName  ka,
PinName  kb,
PinName  kc,
PinName  kd 
)

4x4 keypad interface:

Parameters:
keyinput port A,B,C,D
keyoutput(scan) port X,Y,Z,W

Definition at line 45 of file Keypad.cpp.

Keypad ( PinName  kx,
PinName  ky,
PinName  kz,
PinName  kw,
PinName  ka,
PinName  kb,
PinName  kc,
PinName  kd,
PinName  ke 
)

5x4 keypad interface:

Parameters:
keyinput port A,B,C,D,E
keyoutput(scan) port X,Y,Z,W

Definition at line 64 of file Keypad.cpp.

Keypad ( PinName  kx,
PinName  ky,
PinName  kz,
PinName  kw,
PinName  kv,
PinName  ka,
PinName  kb,
PinName  kc,
PinName  kd,
PinName  ke 
)

5x5 keypad interface:

Parameters:
keyinput port A,B,C,D,E
keyoutput(scan) port X,Y,Z,W,V

Definition at line 84 of file Keypad.cpp.

Member Function Documentation

uint8_t read ( void   )

Read key data into buffer.

Parameters:
none
Returns:
key number by ASCII code

Definition at line 185 of file Keypad.cpp.

bool read_state ( uint8_t  key_num )

Read key ON/OFF state.

Parameters:
none
Returns:
ON(true) or OFF(false)

Definition at line 190 of file Keypad.cpp.

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