// license:GPL-2.0+ // copyright-holders:Kevin Thacker,Sandro Ronco /********************************************************************* kc_keyb.h *********************************************************************/ #ifndef __KC_KEYB_H__ #define __KC_KEYB_H__ #define MCFG_KC_KEYBOARD_OUT_CALLBACK(_write) \ devcb = &kc_keyboard_device::set_out_wr_callback(*device, DEVCB_##_write); /*************************************************************************** TYPE DEFINITIONS ***************************************************************************/ /* number of pulses that can be stored */ #define KC_TRANSMIT_BUFFER_LENGTH 256 // ======================> kc_keyboard_device class kc_keyboard_device : public device_t { public: // construction/destruction kc_keyboard_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); virtual ~kc_keyboard_device(); template static devcb_base &set_out_wr_callback(device_t &device, _Object object) { return downcast(device).m_write_out.set_callback(object); } // optional information overrides virtual ioport_constructor device_input_ports() const; protected: // device-level overrides virtual void device_start(); virtual void device_reset(); virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr); void add_pulse_to_transmit_buffer(int pulse_state, int pulse_number = 1); void add_bit(int bit); void transmit_scancode(UINT8 scan_code); private: static const device_timer_id TIMER_TRANSMIT_PULSE = 1; // internal state emu_timer * m_timer_transmit_pulse; devcb_write_line m_write_out; // pulses to transmit struct { UINT8 data[KC_TRANSMIT_BUFFER_LENGTH>>3]; int pulse_sent; int pulse_count; } m_transmit_buffer; }; // device type definition extern const device_type KC_KEYBOARD; #endif /* __KC_KEYB_H__ */