diff options
Diffstat (limited to 'src/devices/bus/rs232/pty.cpp')
-rw-r--r-- | src/devices/bus/rs232/pty.cpp | 96 |
1 files changed, 58 insertions, 38 deletions
diff --git a/src/devices/bus/rs232/pty.cpp b/src/devices/bus/rs232/pty.cpp index 4c8c9f6bbf7..f633f72bdec 100644 --- a/src/devices/bus/rs232/pty.cpp +++ b/src/devices/bus/rs232/pty.cpp @@ -4,11 +4,9 @@ #include "emu.h" #include "pty.h" -#include <stdio.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, uint32_t clock) : device_t(mconfig, PSEUDO_TERMINAL, tag, owner, clock), device_serial_interface(mconfig, *this), @@ -16,19 +14,22 @@ pseudo_terminal_device::pseudo_terminal_device(const machine_config &mconfig, co 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_flow(*this, "FLOW_CONTROL"), m_input_count(0), m_input_index(0), - m_timer_poll(nullptr) + m_timer_poll(nullptr), + m_rts(0), + m_dtr(0), + m_xoff(0) { } -WRITE_LINE_MEMBER(pseudo_terminal_device::update_serial) +void pseudo_terminal_device::update_serial(int state) { - int startbits = convert_startbits(m_rs232_startbits->read()); + 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()); @@ -47,15 +48,23 @@ WRITE_LINE_MEMBER(pseudo_terminal_device::update_serial) output_dcd(0); output_dsr(0); output_cts(0); + + m_xoff = 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_STARTBITS("RS232_STARTBITS", RS232_STARTBITS_1, "Start Bits", 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) + + PORT_START("FLOW_CONTROL") + PORT_CONFNAME(0x07, 0x00, "Flow Control") + PORT_CONFSETTING( 0x00, DEF_STR(Off)) + PORT_CONFSETTING( 0x01, "RTS") + PORT_CONFSETTING( 0x02, "DTR") + PORT_CONFSETTING( 0x04, "XON/XOFF") INPUT_PORTS_END ioport_constructor pseudo_terminal_device::device_input_ports() const @@ -65,7 +74,7 @@ ioport_constructor pseudo_terminal_device::device_input_ports() const void pseudo_terminal_device::device_start() { - m_timer_poll = timer_alloc(TIMER_POLL); + m_timer_poll = timer_alloc(FUNC(pseudo_terminal_device::update_queue), this); open(); } @@ -78,20 +87,7 @@ void pseudo_terminal_device::device_stop() 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: - break; - } + update_queue(0); } void pseudo_terminal_device::tra_callback() @@ -101,42 +97,66 @@ void pseudo_terminal_device::tra_callback() void pseudo_terminal_device::tra_complete() { - queue(); + update_queue(0); } void pseudo_terminal_device::rcv_complete() { receive_register_extract(); - write(get_received_char()); + + uint8_t const data = get_received_char(); + if (m_flow->read() != 4) + { + write(data); + } + else + { + switch (data) + { + case 0x13: // XOFF + m_xoff = 1; + return; + + case 0x11: // XON + m_xoff = 0; + return; + + default: + break; + } + write(data); + } } -void pseudo_terminal_device::queue(void) +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) { + int const tmp = read(m_input_buffer, sizeof(m_input_buffer)); + if (tmp > 0) m_input_count = tmp; - } else { + else m_input_count = 0; - } } if (m_input_count != 0) { - transmit_register_setup(m_input_buffer[ m_input_index++ ]); + uint8_t const fc = m_flow->read(); - m_timer_poll->adjust(attotime::never); - } - else - { - int txbaud = convert_baud(m_rs232_txbaud->read()); - m_timer_poll->adjust(attotime::from_hz(txbaud)); + if (fc == 0 || (fc == 1 && m_rts == 0) || (fc == 2 && m_dtr == 0) || (fc == 4 && m_xoff == 0)) + { + transmit_register_setup(m_input_buffer[m_input_index++]); + m_timer_poll->adjust(attotime::never); + return; + } } + + int const 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") +DEFINE_DEVICE_TYPE(PSEUDO_TERMINAL, pseudo_terminal_device, "pseudo_terminal", "Pseudo Terminal") |