NAME
ieee1284_ecp_fwd_to_rev, ieee1284_ecp_rev_to_fwd - ECP direction
switching
SYNOPSIS
int ieee1284_ecp_fwd_to_rev(struct parport *port);
int ieee1284_ecp_rev_to_fwd(struct parport *port);
DESCRIPTION
These functions are used to switch directions when in ECP mode. On
negotiation to ECP mode the direction is forward (in other words,
host-to-peripheral). Use ieee1284_ecp_fwd_to_rev to switch from forward
to reverse, and ieee1284_ecp_rev_to_fwd to switch from reverse to
forward.
They act on the parallel port associated with port, which must be
claimed.
RETURN VALUE
E1284_OK
Direction switched successfully.
E1284_NOTIMPL
The port lacks the required capability. This could be due to a
limitation of this version of libieee1284, or a hardware
limitation.
E1284_INVALIDPORT
The port parameter is invalid (for instance, perhaps the port is
not claimed).
AUTHOR
Tim Waugh <twaugh@redhat.com>
Author.
COPYRIGHT
Copyright © 2001-2003 Tim Waugh
09/18/2007 IEEE1284_ECP_FWD_TO_(3)