mirror of
https://github.com/holub/mame
synced 2025-10-06 09:00:04 +03:00
47 lines
1.0 KiB
C++
47 lines
1.0 KiB
C++
// license:BSD-3-Clause
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// copyright-holders:smf
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#include "emu.h"
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#include "clock.h"
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DEFINE_DEVICE_TYPE(CLOCK, clock_device, "clock", "Clock")
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clock_device::clock_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
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: device_t(mconfig, CLOCK, tag, owner, clock),
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m_signal(0),
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m_timer(nullptr),
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m_signal_handler(*this)
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{
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}
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void clock_device::device_start()
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{
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m_signal_handler.resolve();
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save_item(NAME(m_signal));
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}
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void clock_device::device_clock_changed()
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{
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if (!m_signal_handler.isnull() && m_clock > 0)
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{
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if (m_timer == nullptr)
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m_timer = timer_alloc(0);
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const attotime period(attotime::from_hz(m_clock * 2));
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attotime next = period - m_timer->elapsed();
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if (next < attotime::zero)
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next = attotime::zero;
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m_timer->adjust(next, 0, period);
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}
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else if (m_timer != nullptr)
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m_timer->adjust(attotime::never);
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}
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void clock_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
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{
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m_signal = !m_signal;
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m_signal_handler(m_signal);
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}
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