Depot Pertamina / keypad

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keypad.h@0:372ef8c791a1, 2019-07-05 (annotated)

Committer:
irsanjul
Date:
Fri Jul 05 10:33:24 2019 +0000
Revision:
0:372ef8c791a1
hhhh

Who changed what in which revision?

UserRevisionLine numberNew contents of line
irsanjul 0:372ef8c791a1 1 /* mbed Keypad library, using user-defined interrupt callback
irsanjul 0:372ef8c791a1 2 * Copyright (c) 2012 Yoong Hor Meng
irsanjul 0:372ef8c791a1 3 *
irsanjul 0:372ef8c791a1 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
irsanjul 0:372ef8c791a1 5 * of this software and associated documentation files (the "Software"), to deal
irsanjul 0:372ef8c791a1 6 * in the Software without restriction, including without limitation the rights
irsanjul 0:372ef8c791a1 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
irsanjul 0:372ef8c791a1 8 * copies of the Software, and to permit persons to whom the Software is
irsanjul 0:372ef8c791a1 9 * furnished to do so, subject to the following conditions:
irsanjul 0:372ef8c791a1 10 *
irsanjul 0:372ef8c791a1 11 * The above copyright notice and this permission notice shall be included in
irsanjul 0:372ef8c791a1 12 * all copies or substantial portions of the Software.
irsanjul 0:372ef8c791a1 13 *
irsanjul 0:372ef8c791a1 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
irsanjul 0:372ef8c791a1 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
irsanjul 0:372ef8c791a1 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
irsanjul 0:372ef8c791a1 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
irsanjul 0:372ef8c791a1 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
irsanjul 0:372ef8c791a1 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
irsanjul 0:372ef8c791a1 20 * THE SOFTWARE
irsanjul 0:372ef8c791a1 21 */
irsanjul 0:372ef8c791a1 22
irsanjul 0:372ef8c791a1 23 #ifndef KEYPAD_H
irsanjul 0:372ef8c791a1 24 #define KEYPAD_H
irsanjul 0:372ef8c791a1 25
irsanjul 0:372ef8c791a1 26 #include "mbed.h"
irsanjul 0:372ef8c791a1 27 #include "FPointer.h"
irsanjul 0:372ef8c791a1 28
irsanjul 0:372ef8c791a1 29 /**
irsanjul 0:372ef8c791a1 30 * An interrupt-based interface to 4x4 keypad.
irsanjul 0:372ef8c791a1 31 *
irsanjul 0:372ef8c791a1 32 * On each key pressed on a keypad, the index of the key is passed to a
irsanjul 0:372ef8c791a1 33 * user-defined function. User is free to define what to be done with the
irsanjul 0:372ef8c791a1 34 * input.
irsanjul 0:372ef8c791a1 35 *
irsanjul 0:372ef8c791a1 36 * This library makes use of
irsanjul 0:372ef8c791a1 37 * @see http://mbed.org/cookbook/FPointer by Andy Kirkham
irsanjul 0:372ef8c791a1 38 *
irsanjul 0:372ef8c791a1 39 * Example:
irsanjul 0:372ef8c791a1 40 * @code
irsanjul 0:372ef8c791a1 41 * #include "mbed.h"
irsanjul 0:372ef8c791a1 42 * #include "keypad.h"
irsanjul 0:372ef8c791a1 43 *
irsanjul 0:372ef8c791a1 44 * // Define your own keypad values
irsanjul 0:372ef8c791a1 45 * char Keytable[] = { '1', '2', '3', 'A',
irsanjul 0:372ef8c791a1 46 * '4', '5', '6', 'B',
irsanjul 0:372ef8c791a1 47 * '7', '8', '9', 'C',
irsanjul 0:372ef8c791a1 48 * '*', '0', '#', 'D'
irsanjul 0:372ef8c791a1 49 * };
irsanjul 0:372ef8c791a1 50 *
irsanjul 0:372ef8c791a1 51 * uint32_t cbAfterInput(uint32_t index) {
irsanjul 0:372ef8c791a1 52 * printf("Index:%d => Key:%c\n", key, Keytable[index]);
irsanjul 0:372ef8c791a1 53 * return 0;
irsanjul 0:372ef8c791a1 54 * }
irsanjul 0:372ef8c791a1 55 *
irsanjul 0:372ef8c791a1 56 * int main() {
irsanjul 0:372ef8c791a1 57 * Keypad keypad(p25, p26, p27, p28, p21, p22, p23, p24);
irsanjul 0:372ef8c791a1 58 * keypad.CallAfterInput(&cbAfterInput);
irsanjul 0:372ef8c791a1 59 * keypad.Start();
irsanjul 0:372ef8c791a1 60 *
irsanjul 0:372ef8c791a1 61 * while (1) {
irsanjul 0:372ef8c791a1 62 * wait_ms(100);
irsanjul 0:372ef8c791a1 63 * }
irsanjul 0:372ef8c791a1 64 * }
irsanjul 0:372ef8c791a1 65 * @endcode
irsanjul 0:372ef8c791a1 66 */
irsanjul 0:372ef8c791a1 67 class Keypad
irsanjul 0:372ef8c791a1 68 {
irsanjul 0:372ef8c791a1 69 public:
irsanjul 0:372ef8c791a1 70 /** Create a Keypad interface
irsanjul 0:372ef8c791a1 71 *
irsanjul 0:372ef8c791a1 72 * @param row<3..0> Row data lines
irsanjul 0:372ef8c791a1 73 * @param col<3..0> Column data lines
irsanjul 0:372ef8c791a1 74 * @param debounce_ms Debounce in ms (Default to 20ms)
irsanjul 0:372ef8c791a1 75 */
irsanjul 0:372ef8c791a1 76 Keypad(PinName row3, PinName row2, PinName row1, PinName row0,
irsanjul 0:372ef8c791a1 77 PinName col3, PinName col2, PinName col1, PinName col0,
irsanjul 0:372ef8c791a1 78 int debounce_ms = 20);
irsanjul 0:372ef8c791a1 79
irsanjul 0:372ef8c791a1 80 /** Start the keypad interrupt routines
irsanjul 0:372ef8c791a1 81 */
irsanjul 0:372ef8c791a1 82 void Start(void);
irsanjul 0:372ef8c791a1 83
irsanjul 0:372ef8c791a1 84 /** Stop the keypad interrupt routines
irsanjul 0:372ef8c791a1 85 */
irsanjul 0:372ef8c791a1 86 void Stop(void);
irsanjul 0:372ef8c791a1 87
irsanjul 0:372ef8c791a1 88 /** Scan the keyboard for a debounced pressed key
irsanjul 0:372ef8c791a1 89 */
irsanjul 0:372ef8c791a1 90 int DebouncedScan(void);
irsanjul 0:372ef8c791a1 91
irsanjul 0:372ef8c791a1 92 /** Scan the keyboard for a pressed key
irsanjul 0:372ef8c791a1 93 */
irsanjul 0:372ef8c791a1 94 int Scan(void);
irsanjul 0:372ef8c791a1 95
irsanjul 0:372ef8c791a1 96 /** Scan the keyboard for multiple debounced pressed keys
irsanjul 0:372ef8c791a1 97 */
irsanjul 0:372ef8c791a1 98 int DebouncedScanMultiple(void);
irsanjul 0:372ef8c791a1 99
irsanjul 0:372ef8c791a1 100 /** Scan the keyboard for multiple pressed keys
irsanjul 0:372ef8c791a1 101 */
irsanjul 0:372ef8c791a1 102 int ScanMultiple(void);
irsanjul 0:372ef8c791a1 103
irsanjul 0:372ef8c791a1 104 /** User-defined function that to be called when a key is pressed
irsanjul 0:372ef8c791a1 105 * @param fptr A function pointer takes a uint32_t and
irsanjul 0:372ef8c791a1 106 * returns uint32_t
irsanjul 0:372ef8c791a1 107 */
irsanjul 0:372ef8c791a1 108 void CallAfterInput(uint32_t (*fptr)(uint32_t));
irsanjul 0:372ef8c791a1 109
irsanjul 0:372ef8c791a1 110 protected:
irsanjul 0:372ef8c791a1 111 static const int row_count = 4;
irsanjul 0:372ef8c791a1 112 static const int col_count = 4;
irsanjul 0:372ef8c791a1 113
irsanjul 0:372ef8c791a1 114 InterruptIn _row0;
irsanjul 0:372ef8c791a1 115 InterruptIn _row1;
irsanjul 0:372ef8c791a1 116 InterruptIn _row2;
irsanjul 0:372ef8c791a1 117 InterruptIn _row3;
irsanjul 0:372ef8c791a1 118 InterruptIn *_rows[row_count];
irsanjul 0:372ef8c791a1 119 BusInOut _cols; // BusOut doesn't support mode() yet; need open drain to prevent short circuits...
irsanjul 0:372ef8c791a1 120 int _debounce;
irsanjul 0:372ef8c791a1 121 FPointer _input; // Called after each input
irsanjul 0:372ef8c791a1 122
irsanjul 0:372ef8c791a1 123 void _callback();
irsanjul 0:372ef8c791a1 124 void _setupFallTrigger(void);
irsanjul 0:372ef8c791a1 125 };
irsanjul 0:372ef8c791a1 126
irsanjul 0:372ef8c791a1 127 #endif // KEYPAD_H