Any advice on troubleshooting? I upgraded all my gnuradio files, remade
everything, tried taking out the daughterboard. Is this a problem with
board itself, or something that can be rectified? If I whacked a board I
Are there best practices for connecting and disconnecting the board?
I do power up -> usb in, and then when I’m down, power down -> usb out.
have only really messed with running code.
I periodically get this error, I just unplug the usrp and plug it back
and that usually fixes the problem.
I’m not sure if there is a reason that this happens, but the cable
cycling always fixed the problem for me (there were discussions in the
past about the reliability of the USB port’s solder connections, maybe
I have tried unplugging it and replugging it to no avail. I guess I
get why it can initialize and whatnot, but can’t send me a signal.
I checked system profiler, and while it does recognize the USRP Rev 4,
says that the maximum speed is 12mb. Could it be some problem has popped
with the USB interfacing? It seems most reasonable, as the programs load
and everything so the USB cord IS working (I imagine that configuring
USRP is not simply a writing operation and would involve sending info
back?), but USB2 isn’t?
Which Mac type are you using? PPC Mac’s built-in USB 2.0 isn’t good
enough; you’ll want a PC-card or PCI solution instead. My dual 1.25
GHz G4 Mac can do about 10 M-Bytes/s native, but with a $15 drop-in
USB 2.0 card, it can easily handle 32 MB/s. Intel Mac’s have good USB
2.0, and even the least expensive of them can easily handle 32 MB/s …
amazing what a difference a different architecture makes.
On PPC Macs using native USB, make sure your total data transport
(both input and output) is “low” … meaning decimate / interpolate as
much as possible in the FPGA.
I am on a 2nd gen macbook, so it does have USB2. The weirdest part is a)
that it DID work and b) that the USRP still can get the firmware and
whatnot, but it’s only when it starts polling for stuff that it seems
I just tested my computer with a different USRP, and it works, leading
believe that there is something (weird) wrong with my USRP unit
have any idea what these things are prone to, or if there’s something I
do to restore to to a pristine, “factory state,” for troubleshooting?
just frustrating because it worked one day, stopped working the next.