Hi,
I am receiving ERROR_CODE_LATE_COMMAND on occasion in my Rx-only
application and I'm wondering what could be the possible cause. It doesn't
happen often, and seems to occur in the middle of continuous streaming (not
at the start), often after having also received several Overflows.
Normally I associate Late errors with Tx (where the cause is often that a
timed sample arrived at the Tx radio after the time was already passed).
But, I suppose it could happen on Rx if I sent a command to start streaming
at some time in the past. However, such an error would occur right away at
the start of streaming - not after several seconds of successful streaming
and possibly a few Overflows. I can't think of a reason the radio would
issue a Late during the course of continuous streaming. No other commands
(such as gain changes) are being sent by my application during the
streaming.
Here's a little info about my Rx-only application in case it's relevant. I
have a custom FPGA build for a receive-only application where my RFNoC
graph looks like:
Radio=>DDC=>my_blocks=>host
There are actually 4 channels (and 4 host rx_streamers) and "my_blocks"
does some joint channel processing (similar to AddSub block). None of
my_blocks generate this Late error so it must be happening in the Radio,
DDC, or perhaps the rx_streamer.
Rob
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