Yes, sorry indeed I was talking about AUX_DAC and AUX_ADC that are
replicated from the motherboard.
I already use IO which works very well. So there is no way to send
samples (or receive) at a specific sample rate using that AUX_DAC or
ADC. It is just some "analog IOs" for reading some external sensors for
example if I understand well what you wrote.
What are the specifications of that AUX ?
Using a specifique FPGA firmware and custom UHD library, would it be
possible to transform them as GR source or sink ?
Thanks,
Best regards,
Fabien, F4CTZ.
Le 04/03/2022 à 14:35, Marcus Müller a écrit :
> Sorry, hit "send" accidentally:
>
> Dear Fabien,
>
> there's no ADC on these daughterboards. Just an EEPROM for
> identification, opamps for amplification and signal conditioning, and
> on the LFTX a switch-mode power supply. You're right, they do exppose
> the AUX DACs and ADC lines from the motherboad.
>
> However, these are without further ado not accessible from UHD, and
> thus also not from GNU Radio. Some daughterboard drivers use them.
>
> I'm not sure UHD exposes them in all version, but `uhd_usrp_probe
> --tree` might show properties called "AUX_DAC_A" (or _B, or
> AUX_ADC_.., you get the idea). You can use get_device() on your USRP
> blocks and access theses properties from your GNU Radio program (from
> C++), but it's not really an API – more an exposing of intestines...
>
> Best regards,
> Marcus
>
> On 04.03.22 14:30, Marcus Müller wrote:
>> Dear Fabien,
>>
>> there's no ADC on these daughterboards. Just an EEPROM for
>> identification, opamps for amplification and signal conditioning, and
>> on the LFTX a switch-mode power supply.
>>
>> Best regards,
>> Marcus
>>
>> On 04.03.22 10:30, Fabien PELLET wrote:
>>> Hello,
>>>
>>> As there are IOs available on LFTX and LFRX, there are also ADC and
>>> DAC available.
>>>
>>> Is there a way to use them as SOURCE and SINK in gnuradio for low
>>> speed conversion ?
>>>
>>> Thanks,
>>>
>>> Best regards,
>>>
>>> Fabien, F4CTZ.
>>>
>>>
>
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