NAME
ieee1284_ecp_fwd_to_rev, ieee1284_ecp_rev_to_fwd - ECP direction switchingSYNOPSIS
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_OKDirection 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 <[email protected]>- Author.
COPYRIGHT
Copyright © 2001-2003 Tim Waugh| 09/18/2007 |