A quick update ...
I added
#include
to my includes and the following code to UHD_SAFE_MAIN:
=
uhd::device3::sptr usrp3 = usrp->get_device3();
uhd::rfnoc::dma_fifo_block_ctrl::sptr dmafifo_block_ctrl =
usrp3->get_block_ctrl(
Brian --
Thanks so much! I sprinkled my comments in below :
On Wed, Mar 10, 2021 at 1:42 PM Brian Padalino wrote:
> On Wed, Mar 10, 2021 at 12:39 PM Doug Blackburn wrote:
>
>> Brian,
>>
>> I've seen this using UHD-3.14 and UHD-3.15.LTS.
>>
>
> The DMA FIFO block default size is set here in
On Wed, Mar 10, 2021 at 12:39 PM Doug Blackburn wrote:
> Brian,
>
> I've seen this using UHD-3.14 and UHD-3.15.LTS.
>
The DMA FIFO block default size is set here in the source code for
UHD-3.15.LTS:
Brian,
I've seen this using UHD-3.14 and UHD-3.15.LTS.
I have performed some follow-on testing that raises more questions,
particularly about the usage of end_of_burst and start_of_burst. I talk
through my tests and observations below; the questions that these generated
are at the end ...
I
On Tue, Mar 9, 2021 at 10:03 PM Doug Blackburn via USRP-users <
usrp-users@lists.ettus.com> wrote:
> Hello --
>
> I've got some questions re: latency with the x300 over the 10GigE
> interface.
>
> If I use the latency_test example operating at a rate of 50 MSPS, I have
> no issues with a latency
Hah. Yes. Sorry for the confusion.
Sent from my iPhone
> On Mar 9, 2021, at 10:36 PM, Doug Blackburn wrote:
>
>
> Marcus,
>
> Thanks for your response; I believe I am. The math is spread over two lines:
>
> uhd::time_spec_t expectedTime = startTime + (double) ( num_tx_samps )
>
Marcus,
Thanks for your response; I believe I am. The math is spread over two
lines:
uhd::time_spec_t expectedTime = startTime + (double) ( num_tx_samps )
/ (double)usrp->get_tx_rate();
Best,
Doug
On Tue, Mar 9, 2021 at 10:20 PM Marcus D Leech
wrote:
> Shouldn’t
Shouldn’t you be scaling your num_tx_samples by the time per sample when
calculating the expectedTime?
Sent from my iPhone
> On Mar 9, 2021, at 10:03 PM, Doug Blackburn via USRP-users
> wrote:
>
>
> Hello --
>
> I've got some questions re: latency with the x300 over the 10GigE interface.
Hello --
I've got some questions re: latency with the x300 over the 10GigE
interface.
If I use the latency_test example operating at a rate of 50 MSPS, I have no
issues with a latency of 1ms. The latency test receives data, examines the
time stamp, and transmits a single packet.
I have an
