[USRP-users] Error "fifo ctrl timed out looking for acks"

Jonathan Verlant-Chenet jverlant at gmail.com
Fri Apr 10 11:34:18 EDT 2015


Hi Marcus,

Thanks for your answer.

Both computer I tested are using the same switch and the same network
interface (*Qualcomm Atheros AR8161/8165 PCI-E Gigabit Ethernet Controller
(NDIS 6.20)*). But one computer never shows that error. Is it possible that
the problem is due to something else?

Jonathan


On Fri, Apr 10, 2015 at 6:52 AM, Marcus D. Leech via USRP-users <
usrp-users at lists.ettus.com> wrote:

> On 04/10/2015 12:47 AM, Jonathan Verlant-Chenet via USRP-users wrote:
>
>> Hi,
>>
>> I'm using 3 USRP N210 R4 controlled by one computer through a gigabit
>> Ethernet switch and Cat 6 Ethernet cables. The USRPs are commanded
>> through a c++ script lauched by a Matlab code. The host runs on
>> Windows with Matlab 2013a, VS2010 and UHD 003.008.000 (same version on
>> the device)
>>
>> I'm getting the error "fifo ctrl timed out looking for acks" whatever
>> the parameters I put, something like 9 times out of 10 tries. I read
>> online that the "link" between the host and the devices might be down.
>> So I tried rebooting every part the equipment, or simplifying it to 1
>> Ethernet cable between 1 host and 1 USRP. The result is the same.
>>
>> When I try with another computer (same model, but only matlab and the
>> UHD drivers are installed), the error does not appear.
>>
>> Can you help me identifying the source of this error?
>>
>> Thanks in advance,
>> Jonathan
>>
>> _______________________________________________
>> USRP-users mailing list
>> USRP-users at lists.ettus.com
>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>>
> It's likely that your gigabit switch is dropping traffic, or you have a
> Intel 82579LM-based network interface on your host machine which is
>   dropping traffic.
>
>
>
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> USRP-users at lists.ettus.com
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>
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