[USRP-users] USRP2 and UHD 3.8.3

Ian Buckley ianb at ionconcepts.com
Thu Apr 23 14:06:19 EDT 2015


Jonathon,
The source code for both USRP2 and N210 was updated at the same commit with the new FPGA compat number (78eab419fdcdc18f4da8fd33f267af6c4d0494f6).
Hoever because nothing changed *functionally* on USRP2 someone forgot to re-build USRP2 images for inclusion in the updated binary image package.
You are not affected because you build your FPGA from source…it only affects (typical) users who get pre-built FPGA's from Ettus.


-Ian

On Apr 23, 2015, at 10:47 AM, Jonathan Hedstrom via USRP-users <usrp-users at lists.ettus.com> wrote:

> Hi Martin,
> 
> Working on a MIMO project with eight USRP2's. I updated everything last night to uhd.git/release_003_008_003-1 ('uhd_usrp_probe' reports UHD_003.008.003-0-g87dfdc3c) and a custom FPGA image based on fpga.git/UHD-3.8.3. Everything seems to be working correctly. Looking at u2_core.v it seems that the compatibility version is correctly changed to v11.1 (from 10.1 previously). What am I missing?
> 
> Is this only a problem if you're using the usrp2_fpga.bin image downloaded with the uhd_images_downloader app? I didn't test this.
> 
> [ jonathan hedstrom ]
> 
> On Thu, Apr 23, 2015 at 11:12 AM, Martin Braun via USRP-users <usrp-users at lists.ettus.com> wrote:
> Dear USRP2 users,
> 
> (*Note:* this does not affect N2x0, or any other device! Only USRP2,
> with the SD-Card).
> 
> The latest release (3.8.3) has an issue where UHD won't let you use
> USRP2s. Apologies for missing that during testing and RC phases. Latest
> maint (and master) contain a fix for this, and future releases will also
> work.
> 
> If you need to run USRP 2 with a stable release, we recommend 3.8.2,
> although the USRP2 code (both host- and FPGA-side) has not changed in a
> long time, so older versions will also work.
> 
> So, what happened? Our latest release actually had some changes for
> N2x0, mostly related to UBX fixes. As a consequence, we updated the N2x0
> FPGA images, and increased the compat number. On USRP2, nothing was
> changed at all, but due to shared host driver code, UHD is looking for
> the same compat number on both devices. Since we didn't touch USRP2
> specifically, it fell through in our testing.
> 
> This fix simply provides separate compat numbers for USRP2 and N2x0. The
> actual FPGA image for USRP2 never changed, so you don't need to burn the
> SD card for this. If you already did, that's also fine -- the current
> FPGA images for USRP2 are legit.
> 
> Cheers,
> 
> Martin
> 
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