.\"     Title: ieee1284_ecp_fwd_to_rev

.\"    Author: Tim Waugh <twaugh@redhat.com>

.\" Generator: DocBook XSL Stylesheets v1.72.0 <http://docbook.sf.net/>

.\"      Date: 09/18/2007

.\"    Manual: Functions

.\"    Source: 

.\"

.TH "IEEE1284_ECP_FWD_TO_" "3" "09/18/2007" "" "Functions"

.\" disable hyphenation

.nh

.\" disable justification (adjust text to left margin only)

.ad l

.SH "NAME"

ieee1284_ecp_fwd_to_rev, ieee1284_ecp_rev_to_fwd \- ECP direction switching

.SH "SYNOPSIS"

.HP 28

.BI "int ieee1284_ecp_fwd_to_rev(struct\ parport\ *" "port" ");"

.HP 28

.BI "int ieee1284_ecp_rev_to_fwd(struct\ parport\ *" "port" ");"

.SH "DESCRIPTION"

.PP

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

\fBieee1284_ecp_fwd_to_rev\fR

to switch from forward to reverse, and

\fBieee1284_ecp_rev_to_fwd\fR

to switch from reverse to forward.

.PP

They act on the parallel port associated with

\fIport\fR, which must be claimed.

.SH "RETURN VALUE"

.PP

\fBE1284_OK\fR

.RS 4

Direction switched successfully.

.RE

.PP

\fBE1284_NOTIMPL\fR

.RS 4

The

\fIport\fR

lacks the required capability. This could be due to a limitation of this version of libieee1284, or a hardware limitation.

.RE

.PP

\fBE1284_INVALIDPORT\fR

.RS 4

The

\fIport\fR

parameter is invalid (for instance, perhaps the

\fIport\fR

is not claimed).

.RE

.SH "AUTHOR"

.PP

\fBTim Waugh\fR <\&twaugh@redhat.com\&>

.sp -1n

.IP "" 4

Author.

.SH "COPYRIGHT"

Copyright \(co 2001\-2003 Tim Waugh

.br