On Fri, May 11, 2001 at 09:17:40AM -0400, Mark Cianfaglione wrote:
> I have a device here which seems to use the X-flag pin of ECP and I was
> wondering if we do anything with it. I looked into the source for the
> parport driver and it wasn't to clear what it's use is. From what I
> understand it's an extensibility capability indicator. Am I way off the
Xflag is a signal used by the peripheral during negotiation to accept
or reject a negotiated mode. It's low to accept nibble mode, and high
to accept everything else.
You can use the parport IEEE 1284 implementation to negotiate with
extensibility requests by using (IEEE1284_EXT_LINK | mode) as the
requested mode for parport_negotiate.
Does that help?
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