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Re: Ethernet driver question
- From: Laurent GONZALEZ <laurent dot gonzalez at silicomp dot fr>
- To: ecos-discuss at sources dot redhat dot com
- Date: Thu, 30 Oct 2003 09:00:31 +0100
- Subject: Re: [ECOS] Ethernet driver question
- Organization: SILICOMP RESEARCH INSTITUTE
- References: <3FA005C0.7070804@rawbw.com>
On Wed, 29 Oct 2003 10:24:00 -0800
John Newlin <jnewlin@rawbw.com> wrote:
> Couple of silly questions, I like multiple choice:
>
> 1) When the HDWR_Send function is called, is there:
> a) a valid FCS already at the end of the data?
> b) 4 bytes where the FCS should be, but expects the hardware to
> change
> it on the way out
> c) No FCS, expects the hardware to append an FCS
>
> (Our hardware can generate an FCS, so would save some cycles if the
> FCS were not generated in software)
>
> 2) When HDWR_recv is called to get a packet, does it expect a valid
> enet frame including MAC address, and FCS on the end, or does it want
> those stripped off? I imagine the former is correct, but I just want
> to make sure.
>
>
> Thanks,
>
> -John Newlin
>
>
hello,
AFAIK,
1) c) No FCS, expects the hardware to append an FCS
2) expect a valid enet frame including MAC address
any FCS computation are reserved for the hardware layer.
regards,
--
GONZALEZ Laurent
Silicomp Research Institute
Tel: 04 76 41 66 98
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