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Re: [Discuss-gnuradio] some problems about usrp motherboard that i make
Re: [Discuss-gnuradio] some problems about usrp motherboard that i make by myself
Thu, 22 Jul 2010 11:03:22 -0700
On Wed, Jul 21, 2010 at 08:48:46PM -0700, tonygc wrote:
> who can tell me the reason? any help will be appreciated...
Bringing up new hardware (even if you think it's a perfect copy of
somebody else's design) is always a challenge. It requires a wide
range of skills, patience, test equipment and the ability to figure
out how to debug a problem.
Most people I know learned these skills by working side-by-side at a
bench with people who had more experience than they did, both looking
at the same board...
A couple of things to check:
Are the power supplies as expected?
Do the clocks look good?
Can you load code into the FX2?
Can you load an FPGA image into the FPGA?
> tonygc wrote:
> > although there's no PCB of USRP motherboard, i make the PCB by myself.
> > there's no change of the motherboard, according to the schs. after
> > finishing the PCB and all components soldering, i burn the eeprom of the
> > motherboard by /gnuradio/usrp/firmware/src/usrp2/burn-usrp4-eeprom.
> > finally, its leds blinks. that's a small success for me. when i plug in
> > the rfx400 and run benchmark_tx.py, there's a sign that it's working
> > because it displays it's transmitting signals with
> > .......................... unfortunately, the receiver receives nothing...
> > then i use the probe to detect whether USRP works, and the probe displays
> > that it can detect the USRP and the daughterboard. it's the same as the
> > board bought from Ettus. i'm confused. the daughterboard is also ok on
> > the USRP motherboard bought from Ettus.
> > anyone can help me? i don't know how to deal with this problem... thank
> > you for your help!