Seems we’re on the right track here. $180 programming cable and I also found 
FX3 source code on github. Need to figure out what compiler to use to compile 
the FX2 code or upload the raw binary using the $180 programming cable. 

I also created an NI account and sent in a service request. They quoted $450 to 
fix/replace the B205mini. Seems like a good deal. But since I have two boards 
with the same issue thats $900. 

Thanks,
Bill Weedon

On May 6, 2025, at 7:45 PM, Marcus D. Leech <patchvonbr...@gmail.com> wrote:

On 06/05/2025 18:56, Bill weedon wrote:
> I suspect the device was wiped as you stated. Is there a remedy to bring it 
> back to factory standards? There is a mictor connector with FX3 JTAG but 
> requires mating connector, programmer and binary image.
> Thanks,
> Bill Weedon
There is this:

https://www.ettus.com/all-products/jtag-fx3-cable-24/

There's a bootloader image here:

/usr/share/uhd/images/usrp_b200_bl.img

I don't know if that image can be programmed over JTAG, or some other image is 
required.  There is a utility:

/usr/lib/uhd/utils/b2xx_fx3_utils

That is used *when the device actually appears on USB*.   In your case, "side 
loading" through JTAG--->FX3 is not something I
  have a procedure for, but, like I said, I'm trying to find out.


> 
> On May 6, 2025, at 5:43 PM, Marcus D. Leech <patchvonbr...@gmail.com> wrote:
> 
> On 06/05/2025 16:55, w...@appliedradar.com wrote:
>> We tried plugging the unit into several PC’s and laptops, and it seems the 
>> device is not enumerating. I am starting to think the FX3 EEPROM is corrupt. 
>> Is there a way for the user to reset the FX3 firmware to factory setting? Is 
>> a programming cable, FX3 image, and programmer available?
>> 
>> 
> I'm trying to find that out.  If it won't enumerate, there's no way to give 
> the FX3 a factory-fresh boot image over USB.
> 
> This has happened so rarely in the 15  years I've supported USRP devices that 
> I don't have a procedure committed to memory.
> 
> Is it possible that this device was "wiped" according to military security 
> standards for such devices?
> 
> 
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