On 2022-07-07 05:51, STEFANI, Maurizio (External) via USRP-users wrote:
HI,
I need to program the ubx-160 via FPGA using my VHDL code.
Basically the UBX-160 is managed by a PLD but I have not the data
format and protocol to be used.
Is there someone can help me with these info about the format to
program the ubx?
Thank you in advance
Maurizo stefani
Because programming of the synthesizers, RF switches, and
variable-attenuators is rather complicated and highly "procedural", all
of that is done in host
software. The USRPs have always had the doctrine that the
FPGA/motherboard doesn't really "know" anything about the daugtercards,
but simply
facilitates "register" writes/reads via SPI and I2C for the host
software--the FPGA is "dumb" in this respect.
Programming the UBX-160 may require not only a dozen or more I2C/SPI (I
don't recall off the top of my head whether this card is all-SPI or
all-I2C or a mixture)
reads/writes, but also a bunch of *calculations* to help decide what
to write into those registers. This is why it is typically done on the
host.
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