Ecp direction switching
int ieee1284_ecp_fwd_to_rev(struct parport *port); int ieee1284_ecp_rev_to_fwd(struct parport *port);
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.
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).
Tim Waugh <[email protected]>
Author.
Copyright © 2001-2003 Tim Waugh