In particular, make sure you have a clock connected to the CE input of the
FIR filter. Something like this in your clk_domains section:
clk_domains:
- { srcblk: _device_, srcport: ce, dstblk: fir0, dstport: ce }
Wade
On Thu, Jan 13, 2022 at 10:04 AM Wade Fife <[email protected]> wrote:
> Hi Camille,
>
> Maybe you could share your RFNoC YML file and someone could take a look?
> There might be something wrong there.
>
> Wade
>
> On Thu, Jan 13, 2022 at 8:32 AM Camille Moniere <
> [email protected]> wrote:
>
>> Hello everyone,
>>
>> I unsuccessfully try to use the FIR Filter RFNoC block in reception, in
>> an USRP X310 with a UBX-160 daughterboard on-board.
>> I have tested several topology for the custom image (radio0 - > ddc0 ->
>> fir0 -> ep0 || radio0 -> ddc0 -> ep0 + ep1 -> fir0 + fir0 -> ep1, for
>> example),
>> with several parameter for the filter (With or without re-loadable
>> coefficients, with or without embedded DSP registers, 21 coef' instead
>> of 41 ...) but it ultimately
>> always fails the same way.
>> When the FIR is used, I can't retrieve any data. I got an Overflow
>> error, without receiving any samples. Sometimes, I even got a "Late
>> Command" error, even when using RFNoC in C++
>> (graph committed immediately before the stream now stream_cmd).
>>
>> For the record, the center frequency is 433 MHz for a sampling rate of 1
>> Msps.
>>
>> I assumed the filter output one complex sample (sc16) for each new input
>> (sc16 too). Am I wrong? Or is there specific setup I have forgotten?
>> Has someone successfully used this block, and can provide an example or
>> tutorial?
>>
>> Regards,
>>
>> Camille
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>>
>
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