# GNU Radio on Zynq - trouble getting the user\_peripheral kernel module to work

**URL:** <https://www.ruby-forum.com/t/gnu-radio-on-zynq-trouble-getting-the-user-peripheral-kernel-module-to-work/234220>\
**Category:** GNU Radio\
**Created:** [February 16, 2015, 10:31pm UTC](https://www.ruby-forum.com/t/gnu-radio-on-zynq-trouble-getting-the-user-peripheral-kernel-module-to-work/234220 "2015-02-16T22:31:14Z")\
**Posts on this page:** 14\
**Page:** 1

<div class="post-metadata">

**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:** [February 16, 2015, 10:31pm UTC](https://www.ruby-forum.com/t/gnu-radio-on-zynq-trouble-getting-the-user-peripheral-kernel-module-to-work/234220/1 "2015-02-16T22:31:14Z")

</div>

Hello lovely people,

I’m trying to recreate the FIR filter example based on the Zynq GNU  
Radio wiki:  
[http://gnuradio.org/redmine/projects/gnuradio/wiki/Zynq.](http://gnuradio.org/redmine/projects/gnuradio/wiki/Zynq.)[http://gnuradio.org/redmine/projects/gnuradio/wiki/Zynq](http://gnuradio.org/redmine/projects/gnuradio/wiki/Zynq)  
I’ve downloaded the prebuilt filesystem and managed to run GNU Radio  
with an RTL-SDR dongle, there were some issues with the QT and WX GUIs  
(QT was complaining about not finding some pyqt4 libraries, WX didn’t  
exist in GRC - not sure if anyone else had similar issues), so I just  
used the TCP blocks to actually view the output, which all worked quite  
nicely. I’ve had some moderate success using Philip B.'s meta-sdr  
layer on a qemux86 machine and on a Zedboard, but then again - no kernel  
module for the FPGA.

My problem right now is that the prebuilt file systems in  
[http://gnuradio.org/data/sdk/zedboard\_armv7a-sf-vfp-neon/](http://gnuradio.org/data/sdk/zedboard_armv7a-sf-vfp-neon/) don’t seem to  
have the user\_peripheral kernel module to communicate with the FPGA. Is  
it supposed to be in there and I don’t know where to look? Am I supposed  
to cross-compile it on my host machine?

I tried to ‘make’ it inside Zynq, which didn’t work because it couldn’t  
find the Kernel source headers (which as far as I’m aware should be  
located somewhere in /usr/src/)

I also tried to bitbake the entire thing, which I haven’t really had  
success with earlier, by including Jonathon P.'s meta-zynq-gnuradio  
layer ([GitHub - jpendlum/meta-zynq-gnuradio: OpenEmbedded layer to support GNU Radio's GSoC 2013 Zynq Project](https://github.com/jpendlum/meta-zynq-gnuradio)). My bblayers.conf  
looked something like this:

BBLAYERS ?= "   
/home/sarunas/oe-core/meta   
/home/sarunas/layers/meta-zynq-gnuradio   
/home/sarunas/layers/meta-xilinx   
/home/sarunas/layers/meta-oe/meta-oe   
/home/sarunas/layers/meta-oe/meta-python   
/home/sarunas/layers/meta-oe/meta-networking   
/home/sarunas/layers/meta-oe/meta-filesystems   
/home/sarunas/layers/meta-sdr   
"

And the local.conf was taken directly from Jonathon’s GitHub page  
([https://github.com/jpendlum/meta-zynq-gnuradio/blob/master/conf/local.conf.sample](https://github.com/jpendlum/meta-zynq-gnuradio/blob/master/conf/local.conf.sample)).

I tried bitbaking gnuradio-dev-image, with multiple branch combinations  
(masters and daisies), but end of the line is - I have no idea what I’m  
doing. I don’t really know how to figure out which branches in  
particular I should be using for this, thus everything just keeps  
failing.

Obviously, I also tried the repo and oe-gnuradio-manifest path which is  
described in the GNU Radio Zynq wiki, but that doesn’t seem to work for  
me… After doign repo sync I got the following:

Fetching projects: 22% (2/9) Fetching project oe-core  
fatal: Couldn’t find remote ref refs/head/master  
fatal: Couldn’t find remote ref refs/head/master  
error: Cannot fetch oe-core

error: Exited sync due to fetch errors

It fetched meta-xilinx and bitbake OK, but failed at oe-core. Haven’t  
found anything useful in .gitconfig or any other config files. Then  
again I’m not sure what I’m looking for. Anyways, if anybody has  
experienced any of these issues, any help would be really appreciated.  
At the end of the day, I just want to have a working hardware  
acceleration example to study.

Thanks!

Sarunas

---

<div class="post-metadata">

**Author:** ![Sarunas\_Kalade](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/65b543/32.png) [@Sarunas\_Kalade](https://www.ruby-forum.com/u/Sarunas_Kalade)\
**Post date:** [February 18, 2015, 7:20pm UTC](https://www.ruby-forum.com/t/gnu-radio-on-zynq-trouble-getting-the-user-peripheral-kernel-module-to-work/234220/2 "2015-02-18T19:20:19Z")

</div>

On 02/16/2015 10:56 AM, Sarunas Kalade wrote:

> Hello lovely people,
> 
> I’m trying to recreate the FIR filter example based on the Zynq GNU Radio wiki:  
> [http://gnuradio.org/redmine/projects/gnuradio/wiki/Zynq.](http://gnuradio.org/redmine/projects/gnuradio/wiki/Zynq.)[http://gnuradio.org/redmine/projects/gnuradio/wiki/Zynq](http://gnuradio.org/redmine/projects/gnuradio/wiki/Zynq)  
> I’ve downloaded the prebuilt filesystem and managed to run GNU Radio with an  
> RTL-SDR dongle, there were some issues with the QT and WX GUIs (QT was complaining  
> about not finding some pyqt4 libraries, WX didn’t exist in GRC - not sure if  
> anyone else had similar issues), so I just used the TCP blocks to actually view  
> the output, which all worked quite nicely. I’ve had some moderate success using  
> Philip B.'s meta-sdr layer on a qemux86 machine and on a Zedboard, but then  
> again - no kernel module for the FPGA.

WX is built for embedded builds. In general, I suggest running grc on a  
desktop and moving the flow graph over.

> My problem right now is that the prebuilt file systems in  
> [http://gnuradio.org/data/sdk/zedboard\_armv7a-sf-vfp-neon/](http://gnuradio.org/data/sdk/zedboard_armv7a-sf-vfp-neon/) don’t seem to have the  
> user\_peripheral kernel module to communicate with the FPGA. Is it supposed to be  
> in there and I don’t know where to look? Am I supposed to cross-compile it on my  
> host machine?

The kernel module is custom work so you would need to add it to the  
system yourself.

> I tried to ‘make’ it inside Zynq, which didn’t work because it couldn’t find the  
> Kernel source headers (which as far as I’m aware should be located somewhere in  
> /usr/src/)

Let me take a look at adding a package to the default images that would  
let you build kernel modules on the zynq. I think some people did some  
work recently to make that work.

> I also tried to bitbake the entire thing, which I haven’t really had success  
> with earlier, by including Jonathon P.'s meta-zynq-gnuradio layer  
> ([GitHub - jpendlum/meta-zynq-gnuradio: OpenEmbedded layer to support GNU Radio's GSoC 2013 Zynq Project · GitHub](https://github.com/jpendlum/meta-zynq-gnuradio)). My bblayers.conf looked  
> something like this:

I’m guessing Jonathon’s stuff is suffering from bitrot.

> "  
> Fetching projects: 22% (2/9) Fetching project oe-core  
> fatal: Couldn’t find remote ref refs/head/master  
> fatal: Couldn’t find remote ref refs/head/master  
> error: Cannot fetch oe-core
> 
> error: Exited sync due to fetch errors

Interesting. What repo init command did you use? I’d like to sort this  
out.

Philip

---

<div class="post-metadata">

**Author:** ![Sarunas\_Kalade](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/65b543/32.png) [@Sarunas\_Kalade](https://www.ruby-forum.com/u/Sarunas_Kalade)\
**Post date:** [February 18, 2015, 9:51pm UTC](https://www.ruby-forum.com/t/gnu-radio-on-zynq-trouble-getting-the-user-peripheral-kernel-module-to-work/234220/3 "2015-02-18T21:51:51Z")

</div>

Hey Philip,

Thanks for the reply. I’m fairly sure I was using the same repo init  
command as shown in the wiki:  
repo init -u git://github.com/jpendlum/zynq-gnuradio-manifest.git  
repo sync

I tried the same thing just now on a relatively fresh Ubuntu (14.04)  
install on my laptop, which resulted in the following:  
$ repo init -u git://github.com/jpendlum/zynq-gnuradio-manifest.git

```
$ repo sync
Fetching project zynq-acp
Fetching projects: 11% (1/9) Fetching project 

```

zynq-fir-filter-example  
Fetching projects: 22% (2/9) Fetching project meta-sdr  
error: Cannot fetch meta-sdr

```
error: Exited sync due to fetch errors

```

I also tried initing just the oe-gnuradio-manifest :

```
$ repo init -u git://github.com/balister/oe-gnuradio-manifest -b 

```

stable  
(got the same using master, dizzy, daisy)

```
$ repo sync
Fetching project meta-fsl-arm-extra
error: Cannot fetch meta-fsl-arm-extra

error: Exited sync due to fetch errors

```

I’ll have access to the same machine I was using earlier tomorrow and  
run the same things again to make sure.

Thanks.

Sarunas

* * *

From: Philip B. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
Sent: 18 February 2015 18:19  
To: Sarunas Kalade; [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
Subject: Re: [Discuss-gnuradio] GNU Radio on Zynq - trouble getting the  
user\_peripheral kernel module to work

On 02/16/2015 10:56 AM, Sarunas Kalade wrote:

> Hello lovely people,
> 
> I’m trying to recreate the FIR filter example based on the Zynq GNU Radio wiki:  
> [http://gnuradio.org/redmine/projects/gnuradio/wiki/Zynq.](http://gnuradio.org/redmine/projects/gnuradio/wiki/Zynq.)[http://gnuradio.org/redmine/projects/gnuradio/wiki/Zynq](http://gnuradio.org/redmine/projects/gnuradio/wiki/Zynq)  
> I’ve downloaded the prebuilt filesystem and managed to run GNU Radio with an  
> RTL-SDR dongle, there were some issues with the QT and WX GUIs (QT was complaining  
> about not finding some pyqt4 libraries, WX didn’t exist in GRC - not sure if  
> anyone else had similar issues), so I just used the TCP blocks to actually view  
> the output, which all worked quite nicely. I’ve had some moderate success using  
> Philip B.'s meta-sdr layer on a qemux86 machine and on a Zedboard, but then  
> again - no kernel module for the FPGA.

WX is built for embedded builds. In general, I suggest running grc on a  
desktop and moving the flow graph over.

> My problem right now is that the prebuilt file systems in  
> [http://gnuradio.org/data/sdk/zedboard\_armv7a-sf-vfp-neon/](http://gnuradio.org/data/sdk/zedboard_armv7a-sf-vfp-neon/) don’t seem to have the  
> user\_peripheral kernel module to communicate with the FPGA. Is it supposed to be  
> in there and I don’t know where to look? Am I supposed to cross-compile it on my  
> host machine?

The kernel module is custom work so you would need to add it to the  
system yourself.

> I tried to ‘make’ it inside Zynq, which didn’t work because it couldn’t find the  
> Kernel source headers (which as far as I’m aware should be located somewhere in  
> /usr/src/)

Let me take a look at adding a package to the default images that would  
let you build kernel modules on the zynq. I think some people did some  
work recently to make that work.

> I also tried to bitbake the entire thing, which I haven’t really had success  
> with earlier, by including Jonathon P.'s meta-zynq-gnuradio layer  
> ([GitHub - jpendlum/meta-zynq-gnuradio: OpenEmbedded layer to support GNU Radio's GSoC 2013 Zynq Project · GitHub](https://github.com/jpendlum/meta-zynq-gnuradio)). My bblayers.conf looked  
> something like this:

I’m guessing Jonathon’s stuff is suffering from bitrot.

> "  
> Fetching projects: 22% (2/9) Fetching project oe-core  
> fatal: Couldn’t find remote ref refs/head/master  
> fatal: Couldn’t find remote ref refs/head/master  
> error: Cannot fetch oe-core
> 
> error: Exited sync due to fetch errors

Interesting. What repo init command did you use? I’d like to sort this  
out.

Philip

---

<div class="post-metadata">

**Author:** ![Sarunas\_Kalade](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/65b543/32.png) [@Sarunas\_Kalade](https://www.ruby-forum.com/u/Sarunas_Kalade)\
**Post date:** [February 18, 2015, 10:25pm UTC](https://www.ruby-forum.com/t/gnu-radio-on-zynq-trouble-getting-the-user-peripheral-kernel-module-to-work/234220/4 "2015-02-18T22:25:03Z")

</div>

On 02/18/2015 12:50 PM, Sarunas Kalade wrote:

> Hey Philip,
> 
> Thanks for the reply. I’m fairly sure I was using the same repo init command as  
> shown in the wiki:  
> repo init -u git://github.com/jpendlum/zynq-gnuradio-manifest.git  
> repo sync

> **[GitHub - balister/oe-gnuradio-manifest at dizzy](https://github.com/balister/oe-gnuradio-manifest/tree/dizzy)**
>
> dizzy

Use this. I keep this up to date. The dizzy branch is the best place to  
start now.

I need to ask Jonathon to put a warning about being old on his wiki page  
🙂

Philip

---

<div class="post-metadata">

**Author:** ![Sarunas\_Kalade](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/65b543/32.png) [@Sarunas\_Kalade](https://www.ruby-forum.com/u/Sarunas_Kalade)\
**Post date:** [February 19, 2015, 6:14pm UTC](https://www.ruby-forum.com/t/gnu-radio-on-zynq-trouble-getting-the-user-peripheral-kernel-module-to-work/234220/5 "2015-02-19T18:14:59Z")

</div>

I tried doing this and got a fetch error again. (tried for stable,  
master, dizzy and daisy got the exact same result)  
$ repo init -u git://github.com/balister/oe-gnuradio-manifest.git -b  
dizzy  
$ repo sync

```
Fetching project meta-ettus
error: Cannot fetch meta-ettus
error: Exited sync due to fetch errors

```

However, just setting my bblayers.conf to (using all Daisy branches btw)  
BBLAYERS ?= "   
/home/sarunas/oe-core/meta   
/home/sarunas/layers/meta-xilinx   
/home/sarunas/layers/meta-oe/meta-oe   
/home/sarunas/layers/meta-oe/meta-networking   
/home/sarunas/layers/meta-oe/meta-filesystems   
/home/sarunas/layers/meta-sdr   
"  
And using the local.conf options as per you example (  
[https://github.com/balister/meta-sdr/blob/master/conf/local.conf.sample](https://github.com/balister/meta-sdr/blob/master/conf/local.conf.sample)  
) does seem to work for me and I can bitbake a gnuradio-dev-image. I  
just can’t include the meta-gnuradio-zynq layer, because I don’t really  
know which branches to use for all this.

Also tried doing the zynq-gnuradio-manifest again  
$ repo init -u git://github.com/jpendlum/zynq-gnuradio-manifest.git  
$ repo sync

```
Fetching project meta-xilinx
Fetching projects: 11% (1/9) Fetching project bitbake
error: Cannot fetch bitbake
error: Exited sync due to fetch errors

```

Which is kinda weird, because last time it failed at fetching oe-core.

* * *

From: Philip B. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
Sent: 18 February 2015 21:23  
To: Sarunas Kalade; [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
Subject: Re: [Discuss-gnuradio] GNU Radio on Zynq - trouble getting the  
user\_peripheral kernel module to work

On 02/18/2015 12:50 PM, Sarunas Kalade wrote:

> Hey Philip,
> 
> Thanks for the reply. I’m fairly sure I was using the same repo init command as  
> shown in the wiki:  
> repo init -u git://github.com/jpendlum/zynq-gnuradio-manifest.git  
> repo sync

> **[GitHub - balister/oe-gnuradio-manifest at dizzy](https://github.com/balister/oe-gnuradio-manifest/tree/dizzy)**
>
> dizzy

Use this. I keep this up to date. The dizzy branch is the best place to  
start now.

I need to ask Jonathon to put a warning about being old on his wiki page  
🙂

Philip

---

<div class="post-metadata">

**Author:** ![Sarunas\_Kalade](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/65b543/32.png) [@Sarunas\_Kalade](https://www.ruby-forum.com/u/Sarunas_Kalade)\
**Post date:** [February 19, 2015, 7:59pm UTC](https://www.ruby-forum.com/t/gnu-radio-on-zynq-trouble-getting-the-user-peripheral-kernel-module-to-work/234220/6 "2015-02-19T19:59:58Z")

</div>

On 02/19/2015 08:58 AM, Sarunas Kalade wrote:

> I tried doing this and got a fetch error again. (tried for stable, master, dizzy  
> and daisy got the exact same result)  
> $ repo init -u git://github.com/balister/oe-gnuradio-manifest.git -b dizzy  
> $ repo sync
> 
> ```
> Fetching project meta-ettus
> error: Cannot fetch meta-ettus
> error: Exited sync due to fetch errors
> 
> ```

This is the problem you need to solve. Can you read the manifest file to  
see what repo it is using atry to clone by hand and check the needed  
version. Hopefully that makes the problem clearer.

Something like:

git clone git://github.com/EttusResearch/meta-ettus.git  
cd meta-ettus/  
git checkout 9f47e8c6d4a91a06bd6c907f2d27ba40deaa0a2f

Philip

> And using the local.conf options as per you example (  
> [https://github.com/balister/meta-sdr/blob/master/conf/local.conf.sample](https://github.com/balister/meta-sdr/blob/master/conf/local.conf.sample) ) does  
> seem to work for me and I can bitbake a gnuradio-dev-image. I just can’t include  
> the meta-gnuradio-zynq layer, because I don’t really know which branches to use  
> for all this.

meta-gnuradio-zynq is not maintained. I can’t help you with anything on  
Jonathons wiki.

Philip

---

<div class="post-metadata">

**Author:** ![Sarunas\_Kalade](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/65b543/32.png) [@Sarunas\_Kalade](https://www.ruby-forum.com/u/Sarunas_Kalade)\
**Post date:** [February 20, 2015, 6:48pm UTC](https://www.ruby-forum.com/t/gnu-radio-on-zynq-trouble-getting-the-user-peripheral-kernel-module-to-work/234220/7 "2015-02-20T18:48:49Z")

</div>

Could you clarify a bit what you meant by ‘check the needed version’?  
I’ve cloned some of the reps and did the checkouts with the hashes, but  
I always just end up in a ‘detached HEAD’ state.

e.g.  
$ git checkout 5f96c9333ea3ebdf52dd10f1a2cbc1532ff97009  
Note: checking out ‘5f96c9333ea3ebdf52dd10f1a2cbc1532ff97009’.

You are in ‘detached HEAD’ state. You can look around, make experimental  
changes and commit them, and you can discard any commits you make in  
this  
state without impacting any branches by performing another checkout.

If you want to create a new branch to retain commits you create, you may  
do so (now or later) by using -b with the checkout command again.  
Example:

git checkout -b new\_branch\_name

HEAD is now at 5f96c93… gr-baz : Bump revision.

Doing git branch just shows that I am at \* (detached from 5f96c93).  
Should I try hunting down each repo branch where the specific commit was  
made and then edit the manifest.xml file?

I tried going into oe-repo/.repo/manifest.xml and editing the revision  
values by changing them from hashes to actual branch names (i.e. master,  
dizzy, 1.24, etc. etc.) and after doing that repo sync did work in  
retrieving all of the repos. However, doing git branch on any of those  
returned a (no branch), which may or may not be expected.

Sorry if some of this stuff seems obvious, I’m pretty dumb when it comes  
to git.

Sarunas

* * *

From: Philip B. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
Sent: 19 February 2015 18:58  
To: Sarunas Kalade; [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
Subject: Re: [Discuss-gnuradio] GNU Radio on Zynq - trouble getting the  
user\_peripheral kernel module to work

On 02/19/2015 08:58 AM, Sarunas Kalade wrote:

> I tried doing this and got a fetch error again. (tried for stable, master, dizzy  
> and daisy got the exact same result)  
> $ repo init -u git://github.com/balister/oe-gnuradio-manifest.git -b dizzy  
> $ repo sync
> 
> ```
> Fetching project meta-ettus
> error: Cannot fetch meta-ettus
> error: Exited sync due to fetch errors
> 
> ```

This is the problem you need to solve. Can you read the manifest file to  
see what repo it is using atry to clone by hand and check the needed  
version. Hopefully that makes the problem clearer.

Something like:

git clone git://github.com/EttusResearch/meta-ettus.git  
cd meta-ettus/  
git checkout 9f47e8c6d4a91a06bd6c907f2d27ba40deaa0a2f

Philip

> And using the local.conf options as per you example (  
> [https://github.com/balister/meta-sdr/blob/master/conf/local.conf.sample](https://github.com/balister/meta-sdr/blob/master/conf/local.conf.sample) ) does  
> seem to work for me and I can bitbake a gnuradio-dev-image. I just can’t include  
> the meta-gnuradio-zynq layer, because I don’t really know which branches to use  
> for all this.

meta-gnuradio-zynq is not maintained. I can’t help you with anything on  
Jonathons wiki.

Philip

---

<div class="post-metadata">

**Author:** ![Sarunas\_Kalade](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/65b543/32.png) [@Sarunas\_Kalade](https://www.ruby-forum.com/u/Sarunas_Kalade)\
**Post date:** [February 20, 2015, 7:34pm UTC](https://www.ruby-forum.com/t/gnu-radio-on-zynq-trouble-getting-the-user-peripheral-kernel-module-to-work/234220/8 "2015-02-20T19:34:14Z")

</div>

On 02/20/2015 09:47 AM, Sarunas Kalade wrote:

> If you want to create a new branch to retain commits you create, you may
> 
> Sorry if some of this stuff seems obvious, I’m pretty dumb when it comes to git.

It sounds like you can check out meta-ettus from the command line, but  
repo is running into a problem. I’ve done builds in vm’s to try and  
detect all my cached credentials and haven’t seen your issue. Can you  
confirm you succesfully checked out meta-ettus?

Philip

---

<div class="post-metadata">

**Author:** ![Sarunas\_Kalade](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/65b543/32.png) [@Sarunas\_Kalade](https://www.ruby-forum.com/u/Sarunas_Kalade)\
**Post date:** [February 20, 2015, 7:53pm UTC](https://www.ruby-forum.com/t/gnu-radio-on-zynq-trouble-getting-the-user-peripheral-kernel-module-to-work/234220/9 "2015-02-20T19:53:59Z")

</div>

$ git clone git://github.com/EttusResearch/meta-ettus.git  
$ cd meta-ettus/  
$ git checkout 9f47e8c6d4a91a06bd6c907f2d27ba40deaa0a2f  
Note: checking out ‘9f47e8c6d4a91a06bd6c907f2d27ba40deaa0a2f’.

You are in ‘detached HEAD’ state. You can look around, make experimental  
changes and commit them, and you can discard any commits you make in  
this  
state without impacting any branches by performing another checkout.

If you want to create a new branch to retain commits you create, you may  
do so (now or later) by using -b with the checkout command again.  
Example:

git checkout -b new\_branch\_name

HEAD is now at 9f47e8c… Add script to build factory image for E310.

Doing git log brings up all the commits done up until the one I just  
checked out, so I’m assuming it’s behaving properly. I can also git  
checkout master or e300-daisy with no issues.

Also when I tried to bypass meta-ettus, by force syncing I’ve noticed  
that it’s not just meta-ettus that repo can’t fetch - it’s all of them.

$ repo init -u git://github.com/balister/oe-gnuradio-manifest -b dizzy  
$ repo sync -f  
Fetching project meta-ettus  
error: Cannot fetch meta-ettus  
warn: --force-broken, continuing to sync  
Fetching projects: 11% (1/9) Fetching project bitbake  
error: Cannot fetch bitbake  
warn: --force-broken, continuing to sync  
Fetching projects: 22% (2/9) Fetching project meta-fsl-arm-extra  
error: Cannot fetch meta-fsl-arm-extra  
warn: --force-broken, continuing to sync  
Fetching projects: 33% (3/9) Fetching project meta-sdr  
error: Cannot fetch meta-sdr  
warn: --force-broken, continuing to sync  
Fetching projects: 44% (4/9) Fetching project meta-xilinx  
error: Cannot fetch meta-xilinx  
warn: --force-broken, continuing to sync  
Fetching projects: 55% (5/9) Fetching project oe-core  
error: Cannot fetch oe-core  
warn: --force-broken, continuing to sync  
Fetching projects: 66% (6/9) Fetching project meta-oe  
error: Cannot fetch meta-oe  
warn: --force-broken, continuing to sync  
Fetching projects: 77% (7/9) Fetching project meta-ti  
error: Cannot fetch meta-ti  
warn: --force-broken, continuing to sync  
Fetching projects: 88% (8/9) Fetching project meta-fsl-arm  
Fetching projects: 100% (9/9), done.  
fatal: failed to unpack tree object HEAD  
Traceback (most recent call last):  
File “/home/sarunas/oe-repo/.repo/repo/main.py”, line 506, in   
\_Main(sys.argv[1:])  
File “/home/sarunas/oe-repo/.repo/repo/main.py”, line 482, in \_Main  
result = repo.\_Run(argv) or 0  
File “/home/sarunas/oe-repo/.repo/repo/main.py”, line 161, in \_Run  
result = cmd.Execute(copts, cargs)  
File “/home/sarunas/oe-repo/.repo/repo/subcmds/sync.py”, line 681, in  
Execute  
project.Sync\_LocalHalf(syncbuf)  
File “/home/sarunas/oe-repo/.repo/repo/project.py”, line 1196, in  
Sync\_LocalHalf  
self.\_InitWorkTree()  
File “/home/sarunas/oe-repo/.repo/repo/project.py”, line 2296, in  
\_InitWorkTree  
raise GitError(“cannot initialize work tree”)  
error.GitError: cannot initialize work tree

Sarunas

* * *

From: Philip B. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
Sent: 20 February 2015 18:23  
To: Sarunas Kalade; [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
Subject: Re: [Discuss-gnuradio] GNU Radio on Zynq - trouble getting the  
user\_peripheral kernel module to work

On 02/20/2015 09:47 AM, Sarunas Kalade wrote:

> If you want to create a new branch to retain commits you create, you may
> 
> Sorry if some of this stuff seems obvious, I’m pretty dumb when it comes to git.

It sounds like you can check out meta-ettus from the command line, but  
repo is running into a problem. I’ve done builds in vm’s to try and  
detect all my cached credentials and haven’t seen your issue. Can you  
confirm you succesfully checked out meta-ettus?

Philip

---

<div class="post-metadata">

**Author:** ![Sarunas\_Kalade](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/65b543/32.png) [@Sarunas\_Kalade](https://www.ruby-forum.com/u/Sarunas_Kalade)\
**Post date:** [February 20, 2015, 8:12pm UTC](https://www.ruby-forum.com/t/gnu-radio-on-zynq-trouble-getting-the-user-peripheral-kernel-module-to-work/234220/10 "2015-02-20T20:12:59Z")

</div>

On 02/20/2015 10:52 AM, Sarunas Kalade wrote:

> $ git clone git://github.com/EttusResearch/meta-ettus.git  
> $ cd meta-ettus/  
> $ git checkout 9f47e8c6d4a91a06bd6c907f2d27ba40deaa0a2f  
> Note: checking out ‘9f47e8c6d4a91a06bd6c907f2d27ba40deaa0a2f’.

Thanks. I will now sit in the corner and go insane 🙂

I’m going to try making another clean vm and testing. My current  
thinking is maybe there has been an update to repo that changed  
something.

In the short term, you should be able to checkout the layers called for  
in the manifest and go from there.

Thanks,

Philip

---

<div class="post-metadata">

**Author:** ![Sarunas\_Kalade](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/65b543/32.png) [@Sarunas\_Kalade](https://www.ruby-forum.com/u/Sarunas_Kalade)\
**Post date:** [February 20, 2015, 9:02pm UTC](https://www.ruby-forum.com/t/gnu-radio-on-zynq-trouble-getting-the-user-peripheral-kernel-module-to-work/234220/11 "2015-02-20T21:02:08Z")

</div>

Sorry for potentially being a source of temporal madness : / Let me know  
if I can provide any more info that could be useful.

Just FYI about recreating the issue: I tried it on a desktop Ubuntu  
14.04, a fresh Ubuntu 14.04 VM, a Debian VM and just now on a colleagues  
Ubuntu 12.04 VM.

Worst case I’ve still got the prebuilt filesystem, which works fine.  
Just need to do some more reading on the FPGA side of things.

Thanks for taking the time to help out!

Sarunas

* * *

From: Philip B. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
Sent: 20 February 2015 19:11  
To: Sarunas Kalade; [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
Subject: Re: [Discuss-gnuradio] GNU Radio on Zynq - trouble getting the  
user\_peripheral kernel module to work

On 02/20/2015 10:52 AM, Sarunas Kalade wrote:

> $ git clone git://github.com/EttusResearch/meta-ettus.git  
> $ cd meta-ettus/  
> $ git checkout 9f47e8c6d4a91a06bd6c907f2d27ba40deaa0a2f  
> Note: checking out ‘9f47e8c6d4a91a06bd6c907f2d27ba40deaa0a2f’.

Thanks. I will now sit in the corner and go insane 🙂

I’m going to try making another clean vm and testing. My current  
thinking is maybe there has been an update to repo that changed  
something.

In the short term, you should be able to checkout the layers called for  
in the manifest and go from there.

Thanks,

Philip

---

<div class="post-metadata">

**Author:** ![Sarunas\_Kalade](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/65b543/32.png) [@Sarunas\_Kalade](https://www.ruby-forum.com/u/Sarunas_Kalade)\
**Post date:** [February 20, 2015, 9:04pm UTC](https://www.ruby-forum.com/t/gnu-radio-on-zynq-trouble-getting-the-user-peripheral-kernel-module-to-work/234220/12 "2015-02-20T21:04:24Z")

</div>

On 02/20/2015 12:00 PM, Sarunas Kalade wrote:

> Sorry for potentially being a source of temporal madness : / Let me know if I  
> can provide any more info that could be useful.
> 
> Just FYI about recreating the issue: I tried it on a desktop Ubuntu 14.04, a  
> fresh Ubuntu 14.04 VM, a Debian VM and just now on a colleagues Ubuntu 12.04 VM.

I’m a Fedora guy. I wonder if the issue is there.

Philip

---

<div class="post-metadata">

**Author:** ![Sarunas\_Kalade](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/65b543/32.png) [@Sarunas\_Kalade](https://www.ruby-forum.com/u/Sarunas_Kalade)\
**Post date:** [February 24, 2015, 9:32pm UTC](https://www.ruby-forum.com/t/gnu-radio-on-zynq-trouble-getting-the-user-peripheral-kernel-module-to-work/234220/13 "2015-02-24T21:32:50Z")

</div>

On 02/20/2015 12:00 PM, Sarunas Kalade wrote:

> Sorry for potentially being a source of temporal madness : / Let me know if I  
> can provide any more info that could be useful.
> 
> Just FYI about recreating the issue: I tried it on a desktop Ubuntu 14.04, a  
> fresh Ubuntu 14.04 VM, a Debian VM and just now on a colleagues Ubuntu 12.04 VM.
> 
> Worst case I’ve still got the prebuilt filesystem, which works fine. Just need  
> to do some more reading on the FPGA side of things.
> 
> Thanks for taking the time to help out!

OK, we got to the bottom of this. Recent versions of repo barfed on the  
manifest. I’ve updated the manifest and things work now. Sorry for the  
problems.

Philip

---

<div class="post-metadata">

**Author:** ![Sarunas\_Kalade](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/65b543/32.png) [@Sarunas\_Kalade](https://www.ruby-forum.com/u/Sarunas_Kalade)\
**Post date:** [February 25, 2015, 1:01pm UTC](https://www.ruby-forum.com/t/gnu-radio-on-zynq-trouble-getting-the-user-peripheral-kernel-module-to-work/234220/14 "2015-02-25T13:01:25Z")

</div>

Awesome. The manifest works perfectly for me now.

Thank you : )

Sarunas

* * *

From: Philip B. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
Sent: 24 February 2015 20:31  
To: Sarunas Kalade; [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
Subject: Re: [Discuss-gnuradio] GNU Radio on Zynq - trouble getting the  
user\_peripheral kernel module to work

On 02/20/2015 12:00 PM, Sarunas Kalade wrote:

> Sorry for potentially being a source of temporal madness : / Let me know if I  
> can provide any more info that could be useful.
> 
> Just FYI about recreating the issue: I tried it on a desktop Ubuntu 14.04, a  
> fresh Ubuntu 14.04 VM, a Debian VM and just now on a colleagues Ubuntu 12.04 VM.
> 
> Worst case I’ve still got the prebuilt filesystem, which works fine. Just need  
> to do some more reading on the FPGA side of things.
> 
> Thanks for taking the time to help out!

OK, we got to the bottom of this. Recent versions of repo barfed on the  
manifest. I’ve updated the manifest and things work now. Sorry for the  
problems.

Philip