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// license:BSD-3-Clause
// copyright-holders:smf, hap
/*
Generic clock signal device
*/
#ifndef MAME_MACHINE_CLOCK_H
#define MAME_MACHINE_CLOCK_H
#pragma once
class clock_device : public device_t
{
public:
clock_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 0);
auto signal_handler() { return m_signal_handler.bind(); }
auto &set_period(attotime period) { m_period = period; reinit(); return *this; }
auto &set_pulse_width(attotime pw) { assert(!pw.is_never()); m_pw = pw; reinit(); return *this; }
auto &set_duty_cycle(double duty) { assert(duty >= 0.0 && duty <= 1.0); m_duty = duty; m_pw = attotime::never; reinit(); return *this; }
DECLARE_READ_LINE_MEMBER(signal_r) { return m_signal; }
protected:
virtual void device_start() override;
virtual void device_reset() override { output(); }
virtual void device_clock_changed() override { reinit(); }
TIMER_CALLBACK_MEMBER(clock_init);
TIMER_CALLBACK_MEMBER(clock_tick);
private:
void reinit();
void output();
int m_signal;
int m_output;
double m_duty;
attotime m_period;
attotime m_pw;
attotime m_thigh;
attotime m_tlow;
emu_timer *m_timer_init;
emu_timer *m_timer_tick;
devcb_write_line m_signal_handler;
};
DECLARE_DEVICE_TYPE(CLOCK, clock_device)
#endif // MAME_MACHINE_CLOCK_H
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