4x4 matrix keypad
Fork of Keypad by
Keypad.h@3:82aae98732cd, 2018-05-17 (annotated)
- Committer:
- microHenri
- Date:
- Thu May 17 18:41:09 2018 +0000
- Revision:
- 3:82aae98732cd
- Parent:
- 2:a3545b56bdd7
4x4 matrix
Who changed what in which revision?
User | Revision | Line number | New 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 |