# FW: GNU Radio Calling Registers

**URL:** <https://www.ruby-forum.com/t/fw-gnu-radio-calling-registers/231229>\
**Category:** GNU Radio\
**Created:** [July 28, 2014, 10:42pm UTC](https://www.ruby-forum.com/t/fw-gnu-radio-calling-registers/231229 "2014-07-28T22:42:39Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![addis\_a](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/c4cdca/32.png) [@addis\_a](https://www.ruby-forum.com/u/addis_a)\
**Post date:** [July 28, 2014, 10:42pm UTC](https://www.ruby-forum.com/t/fw-gnu-radio-calling-registers/231229/1 "2014-07-28T22:42:39Z")

</div>

Hello All,

I am going through the process of decimating a signal in my FPGA code.

In the Verilog code I will make use of the add\_routing\_header module in  
vita\_rx\_chain.v.

I found this link regarding the FPGA registers:  
[http://gnuradio.org/redmine/projects/gnuradio/wiki/UsrpFAQFpgaRegs](http://gnuradio.org/redmine/projects/gnuradio/wiki/UsrpFAQFpgaRegs).

My questions are:

1. 

```
  Is this link useful and/or does it pertain to the N210?

```

2. 

```
  Are the io_rx_a io_rx_b the methods on this page that would be

```

most useful?

1. 

```
  Can someone explain the connection between the registers in the

```

FPGA and GNU Radio code?

Thanks for any Help

Aaron

---

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**Author:** ![Aaron\_Henderson](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/47e85d/32.png) [@Aaron\_Henderson](https://www.ruby-forum.com/u/Aaron_Henderson)\
**Post date:** [July 29, 2014, 11:56am UTC](https://www.ruby-forum.com/t/fw-gnu-radio-calling-registers/231229/2 "2014-07-29T11:56:32Z")

</div>

Hi Aaron,  
that page is based on libursrp which is horribly outdated ☹

Greetings,  
Marcus

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<div class="post-metadata">

**Author:** ![Aaron\_Henderson](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/47e85d/32.png) [@Aaron\_Henderson](https://www.ruby-forum.com/u/Aaron_Henderson)\
**Post date:** [July 29, 2014, 7:19pm UTC](https://www.ruby-forum.com/t/fw-gnu-radio-calling-registers/231229/3 "2014-07-29T19:19:25Z")

</div>

Aaron,

I recommend you read the FPGA sources. Also, the usrp-users mailing list  
might be more useful for this kind of problem.

Cheers,  
Martin

---

<div class="post-metadata">

**Author:** ![Aaron\_Henderson](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/47e85d/32.png) [@Aaron\_Henderson](https://www.ruby-forum.com/u/Aaron_Henderson)\
**Post date:** [July 29, 2014, 5:58pm UTC](https://www.ruby-forum.com/t/fw-gnu-radio-calling-registers/231229/4 "2014-07-29T17:58:31Z")

</div>

Marcus,

Is there a link available where I can access this information, because,  
I  
will need this to extract the channels I need from the FPGA to further  
filter the signal in GNU Radio.

Aaron

From: discuss-gnuradio-bounces+aaron.henderson=removed\_email\_address@domain.invalid  
[[mailto:discuss-gnuradio-bounces+aaron.henderson=removed\_email\_address@domain.invalid](mailto:discuss-gnuradio-bounces+aaron.henderson=removed_email_address@domain.invalid)]  
On  
Behalf Of Marcus M.  
Sent: Tuesday, July 29, 2014 3:55 AM  
To: removed\_email\_address@domain.invalid  
Subject: Re: [Discuss-gnuradio] FW: GNU Radio Calling Registers

Hi Aaron,  
that page is based on libursrp which is horribly outdated ☹

Greetings,  
Marcus

On 28.07.2014 22:41, Aaron Henderson wrote:

Hello All,

I am going through the process of decimating a signal in my FPGA code.

In the Verilog code I will make use of the add\_routing\_header module in  
vita\_rx\_chain.v.

I found this link regarding the FPGA registers:  
[http://gnuradio.org/redmine/projects/gnuradio/wiki/UsrpFAQFpgaRegs](http://gnuradio.org/redmine/projects/gnuradio/wiki/UsrpFAQFpgaRegs).

My questions are:

1. 

```
  Is this link useful and/or does it pertain to the N210?

```

2. 

```
  Are the io_rx_a io_rx_b the methods on this page that would be

```

most useful?

1. 

```
  Can someone explain the connection between the registers in the

```

FPGA and GNU Radio code?

Thanks for any Help

Aaron