MVME335(7) (Board Software Extension) MVME335(7)
NAME
mvme335 - MVME035/335 Serial Port Driver
DESCRIPTION
The mvme335(7) driver supports the MVME335 Serial And
Parallel I/O Module. The driver provides support for
asynchronous serial communication devices. The maximum
configuration consists of two MVME335 controllers, each
configured with four serial ports. Each line attached to an
MVME335 behaves as described in termio(7). The line speed
of each device can be changed under software control (output
speed = input speed). Baud rates 50 and 200 are not
implemented. The baud rate EXTA defines the baud rate
19200.
The number of data bits (5, 6, 7, or 8), parity (even, odd,
or no) and the number of stop bits( 1 or 2) are also
software selectable (refer to stty(1)).
Additional ioctl(2) calls are implemented to enable hardware
handshake for the receiver and transmitter using the RTS/CTS
lines.
The ioctl(2) system calls use the following form:
#include <sys/mvme331.h> ioctl(fildes, command, arg)
Three additional commands are available:
MSETHWHAND
Set hardware handshake. Arg is a null pointer.
The start/stop input control must be enabled by
setting the IXOFF bit. Refer to termio(7).
MCLEARHWHAND
Reset hardware handshake. Arg is a null pointer.
MGETHWHAND
Request hardware handshake status. Arg is a
pointer to an integer. If the returned value is
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MVME335(7) (Board Software Extension) MVME335(7)
1, hardware handshake is enabled; if it is 0,
hardware handshake is disabled.
FILES
/dev/tty0[0123]
SEE ALSO
lp335(7), stty(7), termio(7).
ioctl(2), tty(4) in the Programmer's Reference Manual.
Appendix A of the System Administrator's Guide.
Page 2 May 1989