Harrison,
On option is to start with Nutaq’s software package for the Zedboard
(http://nutaq.com/en/products/zeptosdr).
This software package includes GNU Radio sink/source blocks on PC to get
your samples from the ADC through your Zynq into your user land on the
PC. It also includes those same GNU Radio sink/source blocks, but for a
GNU Radio running on the ARM processor (includes image with Linux, GNU
Radio, Nutaq drivers, etc… for ARM). The FPGA image with comprehensive
source files and documentation, and the matching host and ARM drivers
(with source code) as well as the GNU Radio user land interface are
provided, which should kick-start your work on the Zedboard as far as
streaming from GNU Radio on the Zedboard is concerned.
Additionally, when using the FMC Radio420x RF daughter card, software
package contains GNU Radio blocks to expose your hardware controls
practically. Our software package includes an FPGA IP Core for the
Radio420x that aims at abstracting the list of the AXI-lite Registers
through the use of this user friendly Radio420x FPGA core, as well as
the corresponding GNU Radio blocks so that you can avoid pulling signals
in the user logic to control the Radio420x and rather call functions on
the host computer to control the radio parameters (clk freq, Tx freq, Rx
freq, filters, gains, auto-calibration of DC offset and IQ imbalance,
etc…). When using an FMC daughter card from a 3rd party vendor with
the Zedboard, you may use generic AXI-lite Registers read and write
functions in the Nutaq API to control the AXI-lite FMC IP core provided
with the FMC card and easily integrate the new card with your existing
GNU Radio application. The package also includes GNU Radio blocks to
read and write to Zynq FPGA registers. It should kick-start your work on
the Zedboard as far as controlling registers from GNU Radio on the
Zedboard is concerned.
This software package is available online but password protected until
we find the most comprehensive way to decouple what’s specific to
Zedboard from what’s specific to the FMC Radio420x. But you can request
access for a free evaluation.
Good luck.
Tristan
[email protected]
-----Message d’origine-----
De: discuss-gnuradio-bounces+tristan.martin=removed_email_address@domain.invalid
[mailto:discuss-gnuradio-bounces+tristan.martin=removed_email_address@domain.invalid] De la
part de Marcus M.
Envoy: 16 octobre 2014 15:29
: [email protected]
Objet: Re: [Discuss-gnuradio] Writing a Radio Driver
Hi Harrison,
There’s no “driver architecture” in GNU Radio; you just write
sink/source blocks.
If you have a few minutes to spare, start with the GNU Radio tutorials
[1] from start to hardware; that should give you a solid primer on how
things work with GNU Radio. If you then know how you get your samples
from the ADC through your Zynq into your userland, you’re basically set
well, aside from minor things like figuring out how to expose your
hardware controls most practically to GNU Radio, and how to avoid
overhead.
Again, there’s no standard for hardware control in GNU Radio[1].
UHD is quite specific to Ettus devices, so I don’t think screwing your
stuff onto that seems very wise (though I’ve seen parts similar to yours
in Ettus products 
[2]). UHD, though, is open source, including the
FPGA image and the matching drivers as well as the userland interface,
and I don’t think the developers mind you looking at the code they
produced to tackle the FPGA-userland interface.
Greetings,
Marcus
[1] maybe there should be. I think we should wrap this up in clean
interface specifications, and define CORBA objects for that j/k.
[2] There is an upcoming embedded USRP, employing a Zynq, the E300.
Ettus presented some information on grcon 2014:
http://www.trondeau.com/storage/grcon14/presentations/Sep16_05_Ettus_Updates.pdf
On 16.10.2014 20:21, Harrison C. wrote:
I can only imagine that we will ultimately use a tweaked version of
Harrison
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