Henri Clarke / Keypad

4x4 matrix keypad

Fork of Keypad by Kenji Arai

Keypad.h@4:cbbd6e3a3be0, 2018-05-17 (annotated)

Committer:
microHenri
Date:
Thu May 17 18:41:52 2018 +0000
Revision:
4:cbbd6e3a3be0
Parent:
3:82aae98732cd 
4x4 matrix fork

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kenjiArai 0:b7249629f337 1 /*
kenjiArai 0:b7249629f337 2 * Mbed Library / Akizuki AE-KIT45-KEYPAD4X3
kenjiArai 0:b7249629f337 3 * http://akizukidenshi.com/catalog/g/gK-12229/
kenjiArai 0:b7249629f337 4 *
kenjiArai 0:b7249629f337 5 * Copyright (c) 2017 Kenji Arai / JH1PJL
kenjiArai 0:b7249629f337 6 * http://www.page.sannet.ne.jp/kenjia/index.html
kenjiArai 0:b7249629f337 7 * http://mbed.org/users/kenjiArai/
kenjiArai 0:b7249629f337 8 * Created: September 27th, 2017
kenjiArai 2:a3545b56bdd7 9 * Revised: December 22nd, 2017
microHenri 3:82aae98732cd 10 *
microHenri 3:82aae98732cd 11 * 4x4 Fork: Henri Clarke
microHenri 3:82aae98732cd 12 * May 17th, 2018
kenjiArai 0:b7249629f337 13 */
kenjiArai 0:b7249629f337 14
kenjiArai 0:b7249629f337 15 #ifndef KEYPAD_H
kenjiArai 0:b7249629f337 16 #define KEYPAD_H
kenjiArai 0:b7249629f337 17
kenjiArai 0:b7249629f337 18 #include "mbed.h"
kenjiArai 0:b7249629f337 19
kenjiArai 0:b7249629f337 20 #define CHNG_CNT 3
kenjiArai 0:b7249629f337 21
kenjiArai 0:b7249629f337 22 /**
kenjiArai 0:b7249629f337 23 * @code
kenjiArai 0:b7249629f337 24 * #include "mbed.h"
kenjiArai 0:b7249629f337 25 * #include "Keypad.h"
kenjiArai 0:b7249629f337 26 *
kenjiArai 2:a3545b56bdd7 27 * // every 2ms runs 6uS for key detection(CPU occupancy is 0.3%/Nucleo-F446RE)
microHenri 3:82aae98732cd 28 * // output port W X Y Z
microHenri 3:82aae98732cd 29 * // Input A * 0 # (D)
microHenri 3:82aae98732cd 30 * // Input B 7 8 9 (C)
microHenri 3:82aae98732cd 31 * // Input C 4 5 6 (B)
microHenri 3:82aae98732cd 32 * // Input D 1 2 3 (A)
microHenri 3:82aae98732cd 33 * // W X Y Z A B C D OUT(WXYZ), IN(ABCD)
kenjiArai 0:b7249629f337 34 * Keypad key(D10, D9, D8, D7, D6, D5, D4);
kenjiArai 0:b7249629f337 35 *
kenjiArai 0:b7249629f337 36 * // define key number at main routine
kenjiArai 0:b7249629f337 37 * char *const key_table = "?*7410852#963"; // key_table[0]=? is not used!
kenjiArai 0:b7249629f337 38 *
kenjiArai 0:b7249629f337 39 * int main() {
kenjiArai 0:b7249629f337 40 * uint32_t key_num;
kenjiArai 0:b7249629f337 41 * while(true) {
kenjiArai 0:b7249629f337 42 * while ((key_num = key.read()) != 0){
kenjiArai 0:b7249629f337 43 * printf("%c\r\n", *(key_table + key_num));
kenjiArai 0:b7249629f337 44 * }
kenjiArai 0:b7249629f337 45 * wait(1.0);
kenjiArai 0:b7249629f337 46 * }
kenjiArai 0:b7249629f337 47 * }
kenjiArai 0:b7249629f337 48 * @endcode
kenjiArai 0:b7249629f337 49 */
kenjiArai 0:b7249629f337 50
kenjiArai 0:b7249629f337 51 class Keypad {
kenjiArai 0:b7249629f337 52 public:
microHenri 3:82aae98732cd 53 /** 4x4 keypad interface:
kenjiArai 0:b7249629f337 54 * @param key input port A,B,C,D
microHenri 3:82aae98732cd 55 * @param key output(scan) port W,X,Y,Z
kenjiArai 0:b7249629f337 56 */
microHenri 3:82aae98732cd 57 Keypad(PinName kw, PinName kx, PinName ky, PinName kz,
kenjiArai 0:b7249629f337 58 PinName ka, PinName kb, PinName kc, PinName kd);
kenjiArai 0:b7249629f337 59
kenjiArai 0:b7249629f337 60 /** Read key data into buffer
kenjiArai 0:b7249629f337 61 * @param none
kenjiArai 1:ed0ad90ad734 62 * @return key number by ASCII code
kenjiArai 0:b7249629f337 63 */
kenjiArai 0:b7249629f337 64 uint8_t read(void);
kenjiArai 0:b7249629f337 65
kenjiArai 0:b7249629f337 66 protected:
kenjiArai 0:b7249629f337 67 DigitalIn *k_in[4];
microHenri 3:82aae98732cd 68 DigitalOut *k_out[4];
kenjiArai 0:b7249629f337 69 Ticker tk;
kenjiArai 0:b7249629f337 70
kenjiArai 0:b7249629f337 71 // key control
kenjiArai 0:b7249629f337 72 enum State {Off_state, Off_to_on_transient, On_state, On_to_off_transient};
microHenri 3:82aae98732cd 73 volatile State key_state[4][4];
microHenri 3:82aae98732cd 74 volatile int8_t key_transent_cntr[4][4];
kenjiArai 0:b7249629f337 75 void key_scan(void);
kenjiArai 0:b7249629f337 76
kenjiArai 0:b7249629f337 77 // buffer control
kenjiArai 1:ed0ad90ad734 78 #define BF_SIZE 16
kenjiArai 0:b7249629f337 79 uint8_t read_addr;
kenjiArai 0:b7249629f337 80 uint8_t write_addr;
kenjiArai 1:ed0ad90ad734 81 uint8_t buf[BF_SIZE];
kenjiArai 0:b7249629f337 82 void bf_put (char dat);
kenjiArai 0:b7249629f337 83 int8_t bf_get (void);
kenjiArai 0:b7249629f337 84
kenjiArai 0:b7249629f337 85 };
kenjiArai 0:b7249629f337 86
kenjiArai 0:b7249629f337 87 #endif // KEYPAD_H