[USRP-users] setting FPGA and AD9862 register values on USRP1

Marcus Müller marcus.mueller at ettus.com
Tue Apr 28 09:43:00 EDT 2015

Hi Christian,

the FPGA registers won't be consistent with what you were used to
libusrp/usrper; that's really really old fashioned.

The point is that as soon as you're using an FPGA image that is not
matching your host UHD code, you won't be able to talk to your device
anymore -- so there's no UHD tool that can do what you want; you will
have to use these outdated tools if you want to use that FPGA image.

Best regards,

On 04/28/2015 01:03 PM, Christian via USRP-users wrote:
> Hi all,
> Is there with the current UHD a command line tool for USRP1 to set various FPGA / AD9862 registers to given values? Basically, I am looking for a substitute for the deprecated usrper, e.g. for "usrper write_fpga_reg 65 100" and "usrper 9862a_write 5 4".
> If there is no such tool in UHD, how else could I accomplish this individual register value writing?
> To provide some context - I am trying to run the USRP1 as a PID feedback controller as suggested in
> https://github.com/akeshet/USRP-PID-Controller
> I guess that I can flash the usrp firmware and the custom FPGA bitcode via uhd_usrp_probe --args fw=/path/to/file.ihx, fpga=/path/to/file.rbf but I am somewhat stuck with the necessary register updates...
> Thank you!
> Christian
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