'\" t
.\"     Title: ieee1284_ecp_fwd_to_rev
.\"    Author: Tim Waugh <twaugh@redhat.com>
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\"      Date: 04/07/2024
.\"    Manual: Functions
.\"    Source: [FIXME: source]
.\"  Language: English
.\"
.TH "IEEE1284_ECP_FWD_TO_" "3" "04/07/2024" "[FIXME: source]" "Functions"
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.SH "NAME"
ieee1284_ecp_fwd_to_rev, ieee1284_ecp_rev_to_fwd \- ECP direction switching
.SH "SYNOPSIS"
.HP \w'int\ ieee1284_ecp_fwd_to_rev('u
.BI "int ieee1284_ecp_fwd_to_rev(struct\ parport\ *" "port" ");"
.HP \w'int\ ieee1284_ecp_rev_to_fwd('u
.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\&>
.RS 4
Author.
.RE
.SH "COPYRIGHT"
.br
Copyright \(co 2001-2003 Tim Waugh
.br