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// license:BSD-3-Clause
// copyright-holders:Vas Crabb
#include "emu.h"
#include "bitsocket.h"
DEFINE_DEVICE_TYPE_NS(TI8X_BIT_SOCKET, bus::ti8x, bit_socket_device, "ti8x_bitsock", "TI-8x Bit Socket")
namespace bus { namespace ti8x {
bit_socket_device::bit_socket_device(
machine_config const &mconfig,
char const *tag,
device_t *owner,
uint32_t clock)
: device_t(mconfig, TI8X_BIT_SOCKET, tag, owner, clock)
, device_ti8x_link_port_interface(mconfig, *this)
, m_stream(*this, "stream")
, m_poll_timer(nullptr)
, m_tip_in(true)
, m_ring_in(true)
{
}
MACHINE_CONFIG_START(bit_socket_device::device_add_mconfig)
MCFG_DEVICE_ADD("stream", BITBANGER, 0)
MACHINE_CONFIG_END
void bit_socket_device::device_start()
{
m_poll_timer = timer_alloc(TIMER_ID_POLL);
save_item(NAME(m_tip_in));
save_item(NAME(m_ring_in));
m_tip_in = m_ring_in = true;
m_poll_timer->adjust(attotime::from_hz(200000), 0, attotime::from_hz(200000));
}
void bit_socket_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
{
switch (id)
{
case TIMER_ID_POLL:
{
u8 data;
while (m_stream->input(&data, 1))
{
if (BIT(data, 1)) output_tip(BIT(data, 0));
if (BIT(data, 2)) output_ring(BIT(data, 0));
}
}
break;
default:
break;
}
}
WRITE_LINE_MEMBER(bit_socket_device::input_tip)
{
m_tip_in = bool(state);
m_stream->output((m_tip_in ? 0x01 : 0x00) | 0x02);
}
WRITE_LINE_MEMBER(bit_socket_device::input_ring)
{
m_ring_in = bool(state);
m_stream->output((m_ring_in ? 0x01 : 0x00) | 0x04);
}
} } // namespace bus::ti8x
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