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 |
|
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
. |
|
char | getKey () |
Returns the letter of the pressed key
. |
|
bool | getKeyPressed () |
Detects if any key was pressed.
|
|
void | enablePullUp () |
Enables internal PullUp resistors on the coloums pins.
|
|
Protected Member Functions |
|
int | getKeyIndex () |
return the index value representating the pressed key
|
Diff: keypad.h
- Revision:
- 10:d66b1727615d
- Parent:
- 9:1f7793af2f64
- Child:
- 11:2176a5cf72b2
--- a/keypad.h Sat Sep 19 16:41:14 2015 +0000 +++ b/keypad.h Sat Sep 19 17:06:05 2015 +0000 @@ -79,14 +79,14 @@ public: /** @brief Create a 4x4 (col, row) or 4x4 keypad interface\n * \n - * @table + * @verbatim * | Col0 | Col1 | Col2 | Col3 \n * -------+------+------+------+----- \n * Row 0 | x | x | x | x \n * Row 1 | x | x | x | x \n * Row 2 | x | x | x | x \n * Row 3 | x | x | x | x \n - * @endtable + * @endverbatim * * @param col<0..3> Row data lines * @param row<0..3> Column data lines