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Re: [Discuss-gnuradio] Auxiliary ADC
From: |
Eric Blossom |
Subject: |
Re: [Discuss-gnuradio] Auxiliary ADC |
Date: |
Thu, 21 Jan 2010 14:50:25 -0800 |
User-agent: |
Mutt/1.5.20 (2009-08-17) |
On Wed, Jan 20, 2010 at 07:20:43PM +0100, Christoph Thein wrote:
>
> > On 01/19/2010 10:35 AM, Christoph Thein wrote:
> > >> On 01/19/2010 09:47 AM, Christoph Thein wrote:
> > >>> Hi,
> > >>>
> > >>> is there a possibility to read the data coming from the auxiliary ADC
> > >>> (AD7922) at the moment? I couldn't find any hint in the code or on the
> > >>> mailing list that could point me to a good direction to start.
> > >>>
> > >>> Just out of interest: What should the auxiliary DAC (AD5623) be used
> > >>> for?
> > >>
> > >> The aux ADCs can be read, and they are used with some of the
> > >> daughterboards to measure received signal level (RFX900-RFX2400) or
> > >> temperature (WBX).
> > >>
> > >> The AUX DACs are used to set gains on most of the daughterboards.
> > >>
> > >> Matt
> > >
> > > Hi Matt,
> > >
> > > Thanks for your answer.
> > >
> > > is the measuring also possible for the RXCV2450 or what is missing to
> > > achieve it?
> >
> > Yes, the XCVR2450 also has RSSI measurement capabilities.
> >
> > Matt
> >
>
> The USRP1 uses the read_aux_adc function to get the values. Does the
> read_gpio
> replace it for the USRP2? If not how is the USRP2 accessing the aux ADC?
>
> Cheers,
> Christoph
At this point, firmware in the USRP2 controls the daughterboards, and
the read_aux_adc functionality is not exported to the host.
Eric