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// license:BSD-3-Clause
// copyright-holders:F. Ulivi
//
#include "emu.h"
#include "pty.h"
#include <cstdio>
static constexpr int TIMER_POLL = 1;
pseudo_terminal_device::pseudo_terminal_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock) :
device_t(mconfig, PSEUDO_TERMINAL, tag, owner, clock),
device_serial_interface(mconfig, *this),
device_rs232_port_interface(mconfig, *this),
device_pty_interface(mconfig, *this),
m_rs232_txbaud(*this, "RS232_TXBAUD"),
m_rs232_rxbaud(*this, "RS232_RXBAUD"),
m_rs232_databits(*this, "RS232_DATABITS"),
m_rs232_parity(*this, "RS232_PARITY"),
m_rs232_stopbits(*this, "RS232_STOPBITS"),
m_input_count(0),
m_input_index(0),
m_timer_poll(nullptr)
{
}
WRITE_LINE_MEMBER(pseudo_terminal_device::update_serial)
{
int startbits = 1;
int databits = convert_databits(m_rs232_databits->read());
parity_t parity = convert_parity(m_rs232_parity->read());
stop_bits_t stopbits = convert_stopbits(m_rs232_stopbits->read());
set_data_frame(startbits, databits, parity, stopbits);
int txbaud = convert_baud(m_rs232_txbaud->read());
set_tra_rate(txbaud);
int rxbaud = convert_baud(m_rs232_rxbaud->read());
set_rcv_rate(rxbaud);
output_rxd(1);
// TODO: make this configurable
output_dcd(0);
output_dsr(0);
output_cts(0);
}
static INPUT_PORTS_START(pseudo_terminal)
PORT_RS232_BAUD("RS232_TXBAUD", RS232_BAUD_9600, "TX Baud", pseudo_terminal_device, update_serial)
PORT_RS232_BAUD("RS232_RXBAUD", RS232_BAUD_9600, "RX Baud", pseudo_terminal_device, update_serial)
PORT_RS232_DATABITS("RS232_DATABITS", RS232_DATABITS_8, "Data Bits", pseudo_terminal_device, update_serial)
PORT_RS232_PARITY("RS232_PARITY", RS232_PARITY_NONE, "Parity", pseudo_terminal_device, update_serial)
PORT_RS232_STOPBITS("RS232_STOPBITS", RS232_STOPBITS_1, "Stop Bits", pseudo_terminal_device, update_serial)
INPUT_PORTS_END
ioport_constructor pseudo_terminal_device::device_input_ports() const
{
return INPUT_PORTS_NAME(pseudo_terminal);
}
void pseudo_terminal_device::device_start()
{
m_timer_poll = timer_alloc(FUNC(pseudo_terminal_device::update_queue), this);
open();
}
void pseudo_terminal_device::device_stop()
{
close();
}
void pseudo_terminal_device::device_reset()
{
update_serial(0);
update_queue(0);
}
void pseudo_terminal_device::tra_callback()
{
output_rxd(transmit_register_get_data_bit());
}
void pseudo_terminal_device::tra_complete()
{
update_queue(0);
}
void pseudo_terminal_device::rcv_complete()
{
receive_register_extract();
write(get_received_char());
}
TIMER_CALLBACK_MEMBER(pseudo_terminal_device::update_queue)
{
if (is_transmit_register_empty())
{
if (m_input_index == m_input_count)
{
m_input_index = 0;
int tmp = read(m_input_buffer , sizeof(m_input_buffer));
if (tmp > 0) {
m_input_count = tmp;
} else {
m_input_count = 0;
}
}
if (m_input_count != 0)
{
transmit_register_setup(m_input_buffer[ m_input_index++ ]);
m_timer_poll->adjust(attotime::never);
}
else
{
int txbaud = convert_baud(m_rs232_txbaud->read());
m_timer_poll->adjust(attotime::from_hz(txbaud));
}
}
}
DEFINE_DEVICE_TYPE(PSEUDO_TERMINAL, pseudo_terminal_device, "pseudo_terminal", "Pseudo terminal")
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