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// license:BSD-3-Clause
// copyright-holders:smf
#include "zndip.h"
const device_type ZNDIP = &device_creator<zndip_device>;
zndip_device::zndip_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
device_t(mconfig, ZNDIP, "Sony ZNDIP", tag, owner, clock, "zndip", __FILE__),
m_data_handler(*this),
m_dataout_handler(*this),
m_dsr_handler(*this)
{
}
void zndip_device::device_start()
{
m_data_handler.resolve_safe( 0 );
m_dataout_handler.resolve_safe();
m_dsr_handler.resolve_safe();
m_dip_timer = timer_alloc( 0 );
m_dataout_handler(1);
m_dsr_handler(1);
}
WRITE_LINE_MEMBER(zndip_device::write_select)
{
if (!state && m_select)
{
m_bit = 0;
m_dip_timer->adjust( attotime::from_usec( 100 ), 0 );
}
else
{
m_dataout_handler(1);
m_dsr_handler(1);
}
m_select = state;
}
WRITE_LINE_MEMBER(zndip_device::write_clock)
{
if (!state && m_clock && !m_select)
{
int dip = m_data_handler();
int bit = ( ( dip >> m_bit ) & 1 );
// verboselog( machine, 2, "read dip %02x -> %02x\n", n_data, bit * PSX_SIO_IN_DATA );
m_dataout_handler(bit);
m_bit++;
m_bit &= 7;
}
m_clock = state;
}
void zndip_device::device_timer(emu_timer &timer, device_timer_id tid, int param, void *ptr)
{
m_dsr_handler(param);
if( !param )
{
m_dip_timer->adjust( attotime::from_usec( 50 ), 1 );
}
}
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