keypad kutuphanesi, Interruptsiz
Dependents: rtos_uygulamasi guvenlik_sistemi keypad_kullanimi lcd_kullanimi_keypad ... more
Diff: Keypad.h
- Revision:
- 0:7da3ab010a87
diff -r 000000000000 -r 7da3ab010a87 Keypad.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Keypad.h Mon May 06 10:27:01 2019 +0000 @@ -0,0 +1,70 @@ +#ifndef KEYPAD_H +#define KEYPAD_H + +#include "mbed.h" + +#define CHNG_CNT 4 + + /* + @code + #include "mbed.h" + #include "Keypad.h" + +Keypad key(D10, D9, D8, D7, D6, D5, D4, D3); + + char key_table[] = { + '1', '2', '3', 'A', + '4', '5', '6', 'B', + '7', '8', '9', 'C', + '*', '0', '#', 'D' + }; + int main() { + uint32_t key_num; + while(true) { + while ((key_num = key.read()) != 0){ + printf("%c\r\n", *(key_table + key_num-1)); + } + wait(1.0); + } + } + * @endcode + */ + +class Keypad { +public: + /** 4x4 keypad interface: + * @param key input port A,B,C,D + * @param key output(scan) port Q,X,Y,Z + */ + Keypad(PinName qx, PinName kx, PinName ky, PinName kz, + PinName ka, PinName kb, PinName kc, PinName kd); + + /** Read key data into buffer + * @param none + * @return key number by ASCII code + */ + uint8_t read(void); + +protected: + DigitalIn *k_in[4]; + DigitalOut *k_out[4]; + Ticker tk; + + // key control + enum State {Off_state, Off_to_on_transient, On_state, On_to_off_transient}; + volatile State key_state[4][4]; + volatile int8_t key_transent_cntr[4][4]; + void key_scan(void); + + // buffer control + #define BF_SIZE 20 + uint8_t read_addr; + uint8_t write_addr; + uint8_t buf[BF_SIZE]; + void bf_put (char dat); + int8_t bf_get (void); + +}; + +#endif // KEYPAD_H +