On 2021-09-10 12:08 p.m., Dobler, Anton wrote:
Is there any alternative to the standard GPIO UHD interface, that
allows me the desired speed and is this issue I see related to
gnuradio and its scheduler or rather to the UHD API for the GPIOs?
BR,
Anton
Every GPIO state transition requires a transaction across your network
interface, and then into the FPGA GPIO logic. That's the absolute upper
limit on
toggling the GPIOs from the host.
You can test how fast you can make this go with a "raw" UHD C++
program. Once you've established how fast it can potentially go, then
you start
evaluating how to approach this latency with GR. Right now, the
waters are very muddy, and I am not the one to comment on GR latencies, etc.
------------------------------------------------------------------------
*Von:* Marcus D. Leech <[email protected]>
*Gesendet:* Freitag, 10. September 2021 18:04
*An:* Dobler, Anton; [email protected]
*Betreff:* Re: AW: USRP, GPIO toggling and Gnuradio
On 2021-09-10 11:54 a.m., Dobler, Anton wrote:
I am extracting the package rate of a receive signal using a rather
complex GRC flowgraph, i.e. I am detecting the preamble of a receive
signal and generate a clock from here. This clock signal period is
within the range of 100us - 1ms.
Toggling GPIOs using the standard GPIO interface for signals this fast
is likely not going to be very speedy.
The GR experts will have to answer your other questions.
