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[Discuss-gnuradio] Issues with USRP2 firmware
From: |
Matthias Wilhelm |
Subject: |
[Discuss-gnuradio] Issues with USRP2 firmware |
Date: |
Tue, 20 Apr 2010 15:22:42 +0200 |
Hi,
I'm currently working on a few changes to the FPGA image, but I ran into some
strange issues that I want to bring up here.
1. It seems that txrx_edk10.1_3.3git-645-gb811e87.bin from the binary builds in
http://gnuradio.org/releases/usrp2-bin/trunk/ is not properly working with both
the latest provided u2_rev3.bin as well as a custom build one from the latest
git version of the gnuradio firmware. The hardware boots up, the LEDs flash
correctly, and the find_usrp2 also works, but the usrp2_fft.py seems to work at
first, but the samples provided seem like noise, although in normal operation
signals are visible. Additionally, switching the channel seems to work as well,
but there is just different levels of noise everywhere. When changing the
decimation value from 16 to 4, the fft (and probably the hardware) hangs.
Revision txrx_edk10.1_3.3git-594-g02616cf8.bin seems to work correctly.
Either I'm doing it wrong, or there are some issues with the firmware. I tried
this with the XCVR2450 board.
2. The Xilinx tools in version 11.1 are without patches not able to generate
the bitstream, even make proj failed. The build also fails because it needs
more RAM than available with a self-made project. With the latest service pack
(sp 5) the software is able to produce a .bin file, but not even the LEDs flash
with this version. There are a lot of warnings, so I cannot tell what the
problem is, but it seems that successful compilation is not enough to make it
work. I made an .ise file with make proj and imported it into ISE, so maybe
some vital information got lost in the process, but since the logic is given i
cant understand how something could go wrong here. 10.1 sp3 works correctly as
expected.
I'm willing to play around with 11.1 a bit more, so if you have some ideas on
how to debug this, I can invest some time into this.
Matthias
- [Discuss-gnuradio] Issues with USRP2 firmware,
Matthias Wilhelm <=