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rs232: Add DCE RxC/TxC callbacks (untested) and table of standard signals (nw)

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This commit is contained in:
AJR 2017-11-30 00:29:25 -05:00
parent 7c314ec44d
commit 970ec09d1e
2 changed files with 58 additions and 0 deletions
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42
src/devices/bus/rs232/rs232.cpp
View File

@ -1,5 +1,39 @@
// license:BSD-3-Clause
// copyright-holders:smf
/***************************************************************************
Generic EIA RS-232/CCITT V.24 serial port emulation
****************************************************************************
Source DB-25 DB-9
1 AA Protective Ground [Shield]
7 5 AB Signal Ground [Common Return]
DTE → 2 3 BA Transmitted Data
← DCE 3 2 BB Received Data
DTE → 4 7 CA Request to Send
← DCE 5 8 CB Clear to Send
← DCE 6 6 CC Data Set Ready [Data Mode]
DTE → 20 4 CD Data Terminal Ready
← DCE 22 9 CE Ring Indicator
← DCE 8 1 CF Received Line Signal Detector [Data Carrier Detect]
← DCE 21 CG Signal Quality Detector
DTE → 23 CH Data Signal Rate Selector
← DCE 23 CI Data Signal Rate Selector [Signaling Rate Indicator]
DTE → 24 DA Transmitter Signal Element Timing [External Tx Clock]
← DCE 15 DB Transmitter Signal Element Timing
← DCE 17 DD Receiver Signal Element Timing
DTE → 14 SBA Secondary Transmitted Data
← DCE 16 SBB Secondary Received Data
DTE → 19 SCA Secondary Request to Send
← DCE 13 SCB Secondary Clear to Send
← DCE 12 SCF Secondary Received Line Signal Detector
DTE → 18 LL Local Loopback
DTE → 21 RL Remote Loopback
← DCE 25 TM Test Mode
***************************************************************************/
#include "emu.h"
#include "rs232.h"
@ -18,11 +52,15 @@ rs232_port_device::rs232_port_device(const machine_config &mconfig, device_type
m_dsr(0),
m_ri(0),
m_cts(0),
m_dce_rxc(0),
m_dce_txc(0),
m_rxd_handler(*this),
m_dcd_handler(*this),
m_dsr_handler(*this),
m_ri_handler(*this),
m_cts_handler(*this),
m_rxc_handler(*this),
m_txc_handler(*this),
m_dev(nullptr)
{
}
@ -43,12 +81,16 @@ void rs232_port_device::device_start()
m_dsr_handler.resolve_safe();
m_ri_handler.resolve_safe();
m_cts_handler.resolve_safe();
m_rxc_handler.resolve_safe();
m_txc_handler.resolve_safe();
save_item(NAME(m_rxd));
save_item(NAME(m_dcd));
save_item(NAME(m_dsr));
save_item(NAME(m_ri));
save_item(NAME(m_cts));
save_item(NAME(m_dce_rxc));
save_item(NAME(m_dce_txc));
m_rxd = 1;
m_dcd = 1;

16
src/devices/bus/rs232/rs232.h
View File

@ -25,6 +25,12 @@
#define MCFG_RS232_CTS_HANDLER(_devcb) \
devcb = &rs232_port_device::set_cts_handler(*device, DEVCB_##_devcb);
#define MCFG_RS232_RXC_HANDLER(_devcb) \
devcb = &rs232_port_device::set_rxc_handler(*device, DEVCB_##_devcb);
#define MCFG_RS232_TXC_HANDLER(_devcb) \
devcb = &rs232_port_device::set_txc_handler(*device, DEVCB_##_devcb);
#define RS232_BAUD_110 (0x00)
#define RS232_BAUD_150 (0x01)
#define RS232_BAUD_300 (0x02)
@ -125,6 +131,8 @@ public:
template <class Object> static devcb_base &set_dsr_handler(device_t &device, Object &&cb) { return downcast<rs232_port_device &>(device).m_dsr_handler.set_callback(std::forward<Object>(cb)); }
template <class Object> static devcb_base &set_ri_handler(device_t &device, Object &&cb) { return downcast<rs232_port_device &>(device).m_ri_handler.set_callback(std::forward<Object>(cb)); }
template <class Object> static devcb_base &set_cts_handler(device_t &device, Object &&cb) { return downcast<rs232_port_device &>(device).m_cts_handler.set_callback(std::forward<Object>(cb)); }
template <class Object> static devcb_base &set_rxc_handler(device_t &device, Object &&cb) { return downcast<rs232_port_device &>(device).m_rxc_handler.set_callback(std::forward<Object>(cb)); }
template <class Object> static devcb_base &set_txc_handler(device_t &device, Object &&cb) { return downcast<rs232_port_device &>(device).m_txc_handler.set_callback(std::forward<Object>(cb)); }
DECLARE_WRITE_LINE_MEMBER( write_txd );
DECLARE_WRITE_LINE_MEMBER( write_dtr );
@ -136,6 +144,8 @@ public:
DECLARE_READ_LINE_MEMBER( dsr_r ) { return m_dsr; }
DECLARE_READ_LINE_MEMBER( ri_r ) { return m_ri; }
DECLARE_READ_LINE_MEMBER( cts_r ) { return m_cts; }
DECLARE_READ_LINE_MEMBER( rxc_r ) { return m_dce_rxc; }
DECLARE_READ_LINE_MEMBER( txc_r ) { return m_dce_txc; }
protected:
rs232_port_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock);
@ -148,12 +158,16 @@ protected:
int m_dsr;
int m_ri;
int m_cts;
int m_dce_rxc;
int m_dce_txc;
devcb_write_line m_rxd_handler;
devcb_write_line m_dcd_handler;
devcb_write_line m_dsr_handler;
devcb_write_line m_ri_handler;
devcb_write_line m_cts_handler;
devcb_write_line m_rxc_handler;
devcb_write_line m_txc_handler;
private:
device_rs232_port_interface *m_dev;
@ -176,6 +190,8 @@ public:
DECLARE_WRITE_LINE_MEMBER( output_dsr ) { m_port->m_dsr = state; m_port->m_dsr_handler(state); }
DECLARE_WRITE_LINE_MEMBER( output_ri ) { m_port->m_ri = state; m_port->m_ri_handler(state); }
DECLARE_WRITE_LINE_MEMBER( output_cts ) { m_port->m_cts = state; m_port->m_cts_handler(state); }
DECLARE_WRITE_LINE_MEMBER( output_rxc ) { m_port->m_dce_rxc = state; m_port->m_rxc_handler(state); }
DECLARE_WRITE_LINE_MEMBER( output_txc ) { m_port->m_dce_txc = state; m_port->m_txc_handler(state); }
protected:
device_rs232_port_interface(const machine_config &mconfig, device_t &device);