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// license:GPL-2.0+
// copyright-holders:Kevin Thacker,Sandro Ronco
/*********************************************************************
kc_keyb.h
*********************************************************************/
#ifndef MAME_MACHINE_KC_KEYB_H
#define MAME_MACHINE_KC_KEYB_H
#pragma once
/***************************************************************************
TYPE DEFINITIONS
***************************************************************************/
// ======================> 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_t clock);
virtual ~kc_keyboard_device();
auto out_wr_callback() { return m_write_out.bind(); }
// optional information overrides
virtual ioport_constructor device_input_ports() const override;
protected:
/* number of pulses that can be stored */
static constexpr unsigned TRANSMIT_BUFFER_LENGTH = 256;
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
TIMER_CALLBACK_MEMBER(transmit_pulse);
void add_pulse_to_transmit_buffer(int pulse_state, int pulse_number = 1);
void add_bit(int bit);
void transmit_scancode(uint8_t scan_code);
private:
// internal state
emu_timer * m_timer_transmit_pulse;
devcb_write_line m_write_out;
// pulses to transmit
struct
{
uint8_t data[TRANSMIT_BUFFER_LENGTH>>3];
int pulse_sent;
int pulse_count;
} m_transmit_buffer;
};
// device type definition
DECLARE_DEVICE_TYPE(KC_KEYBOARD, kc_keyboard_device)
#endif // MAME_MACHINE_KC_KEYB_H
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