Re: N210 DAC and ADC usage

[Fabien PELLET]

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.