IEEE1284_ECP_FWD_
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>.
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