S Mande wrote:
1) Do I need a 3rd party tool to transfer my code to the FPGA on USRP ?
I remember using a JTAG cable and Active-HDL for this task when i worked
with Aldec procesors.
I'm sure there are multiple ways to do this, but I just use the existing
usrp framework to load the RBF file onto the fpga. That is, when I
generate a new RBF file, I throw it into
/usr/local/share/usrp/rev4/std_2rxhb_2tx.rbf and load it up with my own
C application that links to libusrp.so. It's the quick and dirty way,
but hey, it works.
2) I believe that the firmware is loaded everytime I run GNU radio. Is
it that I replace the existing fpga Verilog firmware code ( .v file
) from its existing location .i.e. gnuradio folder
with my modified Verilog firmware code ?
The RBF file that is loaded is picked up from a predetermined location.
In my case, with a rev 4 usrp, it's
/usr/local/share/usrp/rev4/std_2rxhb_2tx.rbf. In your quartus project,
the file you want is in usrp/fpga/toplevel/usrp_std/usrp_std.rbf
If you replace the file in /usr/local... with a new rbf file, the
gnuradio code will load it next time you power cycle/run the USRP.
-Roshan
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