// 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 #define MCFG_KC_KEYBOARD_OUT_CALLBACK(_write) \ devcb = &downcast(*device).set_out_wr_callback(DEVCB_##_write); /*************************************************************************** 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(); template devcb_base &set_out_wr_callback(Object &&cb) { return m_write_out.set_callback(std::forward(cb)); } // 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; virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override; 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: static constexpr 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_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