schreite@helena.physik.uni-stuttgart.de
Mon, 19 Oct 98 12:26:41 +0100
Hi,
> So there's definitely a need to bypass most of IEEE 1284 ECP, esp.
> negotiation.
as I understood Daniel E. Ungar's message, his spectrometer won't
be disturbed by a IEEE1284 negotiation. In my opinion, his spectrometer
would fail anything else than a negotion to ECP mode; but who cares,
when the negotiation to ECP w i l l succeed?
I think it is important, that the code parport_ieee1284 is really
IEEE1284 compatible - when used accordingly to the "manual". But
it is nevertheless very easy to bypass the negotiation: Just code:
your_pardevice->ieee1284.current_mode=IEEE1284_ECP
before the read and write calls.
That's all! The next read or write call will be performed via ECP,
because parport_ieee1284 assumes the device to be in ECP mode.
Why don't you or Daniel code ECP via ECP-parport into parport_ieee1284.c
or parport_pc.c - including DMA and IRQ support? Othervice I will do it,
but not within the next two or three weeks, because I'm very busy at the
moment.
Roger.
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This archive was generated by hypermail 2.0b3 on Wed 30 Dec 1998 - 10:18:38 EST