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RE: Is it possible to do polling for the Ethernetdriverusing a stack ?
- From: Gary Thomas <gthomas at ecoscentric dot com>
- To: "Cusson, Pascal" <pascal dot cusson at analog dot com>
- Cc: David Webster <dwebster at lanergy dot com>,eCos Discussion <ecos-discuss at sources dot redhat dot com>
- Date: 31 Oct 2002 12:45:40 -0700
- Subject: RE: [ECOS] Is it possible to do polling for the Ethernetdriverusing a stack ?
- References: <8FDC0F9BE1F91D44BE964AA54AAA67B6D62B54@wilmexm3.ad.analog.com>
On Thu, 2002-10-31 at 12:32, Cusson, Pascal wrote:
> Hi David,
> Thank you very much for the email! I had no idea where to take the
> next step. I will indeed implement your first suggestion, the one
> without interrupts. I already created a thread as you suggested which
> carries the sc pointer.
>
> So far, when there is a flag raised in FCCE, I call the eth_int(sc)
> function with the proper sc parameter. This function takes car or
> resetting the flags. Before it does so, it calls the eth_receive
> function with the following call: (sc->funs>eth_drv->recv)(sc,
> RxDB->dl). RxDB->dl contains the length of my buffer.
>
> Following, the eth_receive function gets called. In that function, I
> transfer the data into a pre-made memory allocation called sg_list.
>
> All of this seems to be working fine. However, my receive buffer don't
> get cleared (the status is not reset). From all the examples I looked
> at, the status is never reset anywhere. I therefore presume it is done
> by the stack. Could you please explain me some more on this subject. My
> buffers get filled up but they don't ever get reset. I am missing
> something little here.
>
This most likely means that the network threads (there are a number
of them) are not getting to run. Those threads do the actual stack
processing. If they don't run, the buffers will just queue up and
wait.
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Gary Thomas |
eCosCentric, Ltd. |
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