diff options
Diffstat (limited to 'src/devices/bus/rs232/pty.cpp')
-rw-r--r-- | src/devices/bus/rs232/pty.cpp | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/src/devices/bus/rs232/pty.cpp b/src/devices/bus/rs232/pty.cpp new file mode 100644 index 00000000000..0039925ac85 --- /dev/null +++ b/src/devices/bus/rs232/pty.cpp @@ -0,0 +1,138 @@ +// license:BSD-3-Clause +// copyright-holders:F. Ulivi +// +#include <stdio.h> +#include "pty.h" + +static const int TIMER_POLL = 1; + +pseudo_terminal_device::pseudo_terminal_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + device_t(mconfig, PSEUDO_TERMINAL, "Pseudo terminal", tag, owner, clock, "pseudo_terminal", __FILE__), + 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_startbits(*this, "RS232_STARTBITS"), + 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) +{ +} + +WRITE_LINE_MEMBER(pseudo_terminal_device::update_serial) +{ + int startbits = convert_startbits(m_rs232_startbits->read()); + 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) + MCFG_RS232_BAUD("RS232_TXBAUD", RS232_BAUD_9600, "TX Baud", pseudo_terminal_device, update_serial) + MCFG_RS232_BAUD("RS232_RXBAUD", RS232_BAUD_9600, "RX Baud", pseudo_terminal_device, update_serial) + MCFG_RS232_STARTBITS("RS232_STARTBITS", RS232_STARTBITS_1, "Start Bits", pseudo_terminal_device, update_serial) + MCFG_RS232_DATABITS("RS232_DATABITS", RS232_DATABITS_8, "Data Bits", pseudo_terminal_device, update_serial) + MCFG_RS232_PARITY("RS232_PARITY", RS232_PARITY_NONE, "Parity", pseudo_terminal_device, update_serial) + MCFG_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(TIMER_POLL); + + open(); +} + +void pseudo_terminal_device::device_stop() +{ + close(); +} + +void pseudo_terminal_device::device_reset() +{ + update_serial(0); + queue(); +} + +void pseudo_terminal_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) +{ + switch (id) + { + case TIMER_POLL: + queue(); + break; + + default: + device_serial_interface::device_timer(timer, id, param, ptr); + } +} + +void pseudo_terminal_device::tra_callback() +{ + output_rxd(transmit_register_get_data_bit()); +} + +void pseudo_terminal_device::tra_complete() +{ + queue(); +} + +void pseudo_terminal_device::rcv_complete() +{ + receive_register_extract(); + write(get_received_char()); +} + +void pseudo_terminal_device::queue(void) +{ + 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)); + } + } +} + +const device_type PSEUDO_TERMINAL = &device_creator<pseudo_terminal_device>; |