keypad.h

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#ifndef KEYPAD_H
#define KEYPAD_H
 
// keypad scan state machine states
typedef enum
{
    KEYPAD_STATE_IDLE,
    KEYPAD_STATE_SCAN_COL_1,
    KEYPAD_STATE_SCAN_COL_2,
    KEYPAD_STATE_SCAN_COL_3,
    KEYPAD_STATE_ADD_BUTTON
}keypad_scan_states_t;
 
#endif // ifndef KEYPAD_H