4x4 Keypad easy to use library that pollis the interface width pullups
Dependents: 4x4KeyBoardExample xoxokey 4x4KeyBoardExample ProgettoCassaforte ... more
Fork of keypad by
Simple library for reading a 4x4 keypad width at ability to use internal pullups
Import program
00001 #include "mbed.h" 00002 #include "keypad.h" 00003 00004 Serial pc(USBTX, USBRX); 00005 00006 00007 int main() { 00008 // c0 c1 c2 c3 r0 r1 r2 r3 00009 Keypad keypad( PC_3,PC_2,PA_0,PA_1,PA_4,PB_0,PC_1,PC_0 ); 00010 00011 keypad.enablePullUp(); 00012 char key; 00013 pc.printf("Please touch a key on the keypad\n\r"); 00014 while (1) 00015 { 00016 key = keypad.getKey(); 00017 if(key != KEY_RELEASED) 00018 { 00019 pc.printf("%c\r\n",key); 00020 wait(0.6); 00021 } 00022 } 00023 }
Import library
Public Member Functions |
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Keypad (PinName col0, PinName col1, PinName col2, PinName col3, PinName row0, PinName row1, PinName row2, PinName row3) | |
Create a 4x4 (col, row) or 4x4 keypad interface
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char | getKey () |
Returns the letter of the pressed key
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bool | getKeyPressed () |
Detects if any key was pressed.
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void | enablePullUp () |
Enables internal PullUp resistors on the coloums pins.
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Protected Member Functions |
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int | getKeyIndex () |
return the index value representating the pressed key
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keypad.h@0:1fa357ea3fcc, 2010-11-06 (annotated)
- Committer:
- DimiterK
- Date:
- Sat Nov 06 14:36:22 2010 +0000
- Revision:
- 0:1fa357ea3fcc
- Child:
- 1:fa689a04c361
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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DimiterK | 0:1fa357ea3fcc | 1 | /* Copyright (c) 2010 Dimiter Kentri |
DimiterK | 0:1fa357ea3fcc | 2 | |
DimiterK | 0:1fa357ea3fcc | 3 | Permission is hereby granted, free of charge, to any person obtaining a copy |
DimiterK | 0:1fa357ea3fcc | 4 | of this software and associated documentation files (the "Software"), to deal |
DimiterK | 0:1fa357ea3fcc | 5 | in the Software without restriction, including without limitation the rights |
DimiterK | 0:1fa357ea3fcc | 6 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
DimiterK | 0:1fa357ea3fcc | 7 | copies of the Software, and to permit persons to whom the Software is |
DimiterK | 0:1fa357ea3fcc | 8 | furnished to do so, subject to the following conditions: |
DimiterK | 0:1fa357ea3fcc | 9 | |
DimiterK | 0:1fa357ea3fcc | 10 | The above copyright notice and this permission notice shall be included in |
DimiterK | 0:1fa357ea3fcc | 11 | all copies or substantial portions of the Software. |
DimiterK | 0:1fa357ea3fcc | 12 | |
DimiterK | 0:1fa357ea3fcc | 13 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
DimiterK | 0:1fa357ea3fcc | 14 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
DimiterK | 0:1fa357ea3fcc | 15 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
DimiterK | 0:1fa357ea3fcc | 16 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
DimiterK | 0:1fa357ea3fcc | 17 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
DimiterK | 0:1fa357ea3fcc | 18 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
DimiterK | 0:1fa357ea3fcc | 19 | THE SOFTWARE. |
DimiterK | 0:1fa357ea3fcc | 20 | */ |
DimiterK | 0:1fa357ea3fcc | 21 | |
DimiterK | 0:1fa357ea3fcc | 22 | #ifndef KEYPAD_H |
DimiterK | 0:1fa357ea3fcc | 23 | #define KEYPAD_H |
DimiterK | 0:1fa357ea3fcc | 24 | |
DimiterK | 0:1fa357ea3fcc | 25 | #include "DigitalIn.h" |
DimiterK | 0:1fa357ea3fcc | 26 | #include "BusOut.h" |
DimiterK | 0:1fa357ea3fcc | 27 | |
DimiterK | 0:1fa357ea3fcc | 28 | |
DimiterK | 0:1fa357ea3fcc | 29 | namespace mbed{ |
DimiterK | 0:1fa357ea3fcc | 30 | |
DimiterK | 0:1fa357ea3fcc | 31 | const char NO_KEY = '\0'; |
DimiterK | 0:1fa357ea3fcc | 32 | #define KEY_RELEASED NO_KEY |
DimiterK | 0:1fa357ea3fcc | 33 | |
DimiterK | 0:1fa357ea3fcc | 34 | |
DimiterK | 0:1fa357ea3fcc | 35 | |
DimiterK | 0:1fa357ea3fcc | 36 | const int keys[16] = {'1','2','3','A', |
DimiterK | 0:1fa357ea3fcc | 37 | '4','5','6','B', |
DimiterK | 0:1fa357ea3fcc | 38 | '7','8','9','C', |
DimiterK | 0:1fa357ea3fcc | 39 | '*','0','#','D'}; |
DimiterK | 0:1fa357ea3fcc | 40 | |
DimiterK | 0:1fa357ea3fcc | 41 | class Keypad{ |
DimiterK | 0:1fa357ea3fcc | 42 | public: |
DimiterK | 0:1fa357ea3fcc | 43 | Keypad(PinName col1, PinName col2, PinName col3, PinName col4, PinName row1,PinName row2, PinName row3, PinName row4); |
DimiterK | 0:1fa357ea3fcc | 44 | int getKeyIndex(); |
DimiterK | 0:1fa357ea3fcc | 45 | char getKey(); |
DimiterK | 0:1fa357ea3fcc | 46 | |
DimiterK | 0:1fa357ea3fcc | 47 | protected: |
DimiterK | 0:1fa357ea3fcc | 48 | DigitalIn _col1,_col2,_col3,_col4; |
DimiterK | 0:1fa357ea3fcc | 49 | BusOut _rows; |
DimiterK | 0:1fa357ea3fcc | 50 | }; |
DimiterK | 0:1fa357ea3fcc | 51 | |
DimiterK | 0:1fa357ea3fcc | 52 | } |
DimiterK | 0:1fa357ea3fcc | 53 | #endif |