[USRP-users] Receiving IO Block Error when Using RFNoC Split Stream

Jonathan Lockhart jlockhartrt at gmail.com
Thu Nov 14 15:32:45 EST 2019


Greetings EJ,

So went and dug out the E312 b/c I couldn't wait and unfortunately that
didn't resolve the issue I was experiencing. I cherry picked the new
split_stream block, I am using the same flow graph as provided before, but
when it goes to run on the E312 I get the following error.

Traceback (most recent call last):
  File "rfnoc_fosphor_radio_network_usrp.py", line 281, in <module>
    main()
  File "rfnoc_fosphor_radio_network_usrp.py", line 271, in main
    tb.start()
  File
"/home/root/localinstall/usr/lib/python2.7/site-packages/gnuradio/gr/top_block.py",
line 109, in start
    top_block_start_unlocked(self._impl, max_noutput_items)
  File
"/home/root/localinstall/usr/lib/python2.7/site-packages/gnuradio/gr/runtime_swig.py",
line 3671, in top_block_start_unlocked
    return _runtime_swig.top_block_start_unlocked(*args, **kwargs)
RuntimeError: uhd_rfnoc_SplitStream(9): missing connection from output port
0

Looks like something is missing from the split stream. I assume it needs to
be fixed in the verilog.

I attached a screenshot of the new, cleaned up GNU radio file. I had to
remove a FIFO and switch to using a throttle b/c I wasn't able to get it
all to fit in the bit file.

Regards,
Jon

On Wed, Nov 13, 2019 at 10:46 AM Jonathan Lockhart <jlockhartrt at gmail.com>
wrote:

> Greetings EJ,
>
> Thanks for the info. I haven't had time to grab the new block as my dev
> box is packed for moving this weekend. I will get it downloaded and try it
> as soon as I can.
>
> Regards,
> Jon
>
> On Sat, Nov 9, 2019 at 9:48 AM EJ Kreinar <ejkreinar at gmail.com> wrote:
>
>> Hi there,
>>
>> Just want to chime in since I recently went through the upgrade process
>> to UHD-3.14...
>>
>> Can you confirm you're using uhd-3.14? If so, this is actually a split
>> stream fpga bug caused by the commit Jon referred to, not the "not enough
>> bandwidth" problem.
>>
>> Fortunately, rather than referring the old commit, the bug seems to have
>> been fixed in October on the master branch: https://
>> github.com/EttusResearch/fpga/commit/1102779f49d44c9e8b88ce7251d203eb62ae26c9
>> (but not yet ported onto 3.14)
>>
>> I just cherry-picked 1102779f onto my UHD-3.14 and it cleaned it up for
>> me.
>>
>> I assume this will eventually make it to the UHD-3.14 branch? But if not
>> the cherry pick works fine
>>
>> EJ
>>
>>
>> On Fri, Nov 8, 2019, 2:43 PM Jonathan Lockhart via USRP-users <
>> usrp-users at lists.ettus.com> wrote:
>>
>>> Jonathon,
>>>
>>> I will give that a try and see if it works.
>>>
>>>
>>> Nick,
>>>
>>> If the revert on Split_Stream fails, I will try switching from ce_clk to
>>> bus_clk and give that a try.
>>>
>>>
>>> Regards,
>>> Jon
>>>
>>> On Fri, Nov 8, 2019 at 1:52 PM Nick Foster <bistromath at gmail.com> wrote:
>>>
>>>> Jonathon (Pendlum), correct me if I'm wrong, but I think this is the
>>>> usual split-stream-demands-more-bandwidth-than-RFNoC-bus-allows problem.
>>>>
>>>> Jonathan (Lockhart), if I'm right, then in your
>>>> rfnoc_ce_auto_inst_e310.v, if you change the ce_clk/ce_rst in the
>>>> noc_block_split_stream instantiation to bus_clk/bus_rst, this may fix the
>>>> problem.
>>>>
>>>> Nick
>>>>
>>>> On Fri, Nov 8, 2019 at 10:20 AM Jonathon Pendlum <
>>>> jonathon.pendlum at ettus.com> wrote:
>>>>
>>>>> Hi Jon,
>>>>>
>>>>> Can you try reverting commit e39334fe on the fpga repo and rebuilding
>>>>> your bitstream? Let me know if that makes a difference or not.
>>>>>
>>>>> Jonathon
>>>>>
>>>>> On Sat, Nov 9, 2019 at 12:13 AM Jonathan Lockhart via USRP-users <
>>>>> usrp-users at lists.ettus.com> wrote:
>>>>>
>>>>>> Greetings Nick,
>>>>>>
>>>>>> Here is the screenshot of my GR flow graph, though it shouldn't
>>>>>> matter as the Split_Stream RFNoC Block I believe is a failure of the python
>>>>>> or Verilog but the solutions in the link I sent in my previous email did
>>>>>> not resolve the issue.
>>>>>>
>>>>>> [image: Screenshot from 2019-11-08 10-06-50.png]
>>>>>>
>>>>>> Regards,
>>>>>> Jon
>>>>>>
>>>>>> On Thu, Nov 7, 2019 at 5:33 PM Nick Foster <bistromath at gmail.com>
>>>>>> wrote:
>>>>>>
>>>>>>> Can you be more specific about what your flowgraph looks like?
>>>>>>>
>>>>>>> On Thu, Nov 7, 2019 at 2:22 PM Jonathan Lockhart via USRP-users <
>>>>>>> usrp-users at lists.ettus.com> wrote:
>>>>>>>
>>>>>>>> Greetings,
>>>>>>>>
>>>>>>>> I was wondering if anyone had encountered the following error and
>>>>>>>> had a way to fix it?
>>>>>>>>
>>>>>>>> [INFO] [UHD] linux; GNU C++ version 4.9.2; Boost_105700;
>>>>>>>> UHD_3.14.1.HEAD-0-g0347a6d8
>>>>>>>> [INFO] [E300] Loading FPGA image:
>>>>>>>> /home/root/localinstall/e300.bit...
>>>>>>>> [INFO] [E300] FPGA image loaded
>>>>>>>> [INFO] [E300] Detecting internal GPS
>>>>>>>> .... [INFO] [E300] GPSDO found
>>>>>>>> [INFO] [E300] Initializing core control (global registers)...
>>>>>>>>
>>>>>>>> [INFO] [E300] Performing register loopback test...
>>>>>>>> [INFO] [E300] Register loopback test passed
>>>>>>>> [INFO] [0/Radio_0] Initializing block control (NOC ID:
>>>>>>>> 0x12AD100000000000)
>>>>>>>> [WARNING] [RFNOC] Can't find a block controller for key
>>>>>>>> SplitStream, using default block controller!
>>>>>>>> [INFO] [0/SplitStream_0] Initializing block control (NOC ID:
>>>>>>>> 0x5757000000000000)
>>>>>>>> [ERROR] [UHD] Exception caught in safe-call.
>>>>>>>>   in ctrl_iface_impl<_endianness>::~ctrl_iface_impl() [with
>>>>>>>> uhd::endianness_t _endianness = (uhd::endianness_t)1u]
>>>>>>>>   at
>>>>>>>> /home/jon/rfnoc_3.14.1.1/src/uhd/host/lib/rfnoc/ctrl_iface.cpp:52
>>>>>>>> this->send_cmd_pkt(0, 0, true); -> EnvironmentError: IOError: Block
>>>>>>>> ctrl (CE_01_Port_21) no response packet - AssertionError: bool(buff)
>>>>>>>>   in uint64_t ctrl_iface_impl<_endianness>::wait_for_ack(bool,
>>>>>>>> double) [with uhd::endianness_t _endianness = (uhd::endianness_t)1u;
>>>>>>>> uint64_t = long long unsigned int]
>>>>>>>>   at
>>>>>>>> /home/jon/rfnoc_3.14.1.1/src/uhd/host/lib/rfnoc/ctrl_iface.cpp:142
>>>>>>>>
>>>>>>>> Traceback (most recent call last):
>>>>>>>>   File "rfnoc_fosphor_network_usrp.py", line 283, in <module>
>>>>>>>>     main()
>>>>>>>>   File "rfnoc_fosphor_network_usrp.py", line 272, in main
>>>>>>>>     tb = top_block_cls(fft_size=options.fft_size,
>>>>>>>> fpga_path=options.fpga_path, freq=options.freq, gain=options.gain,
>>>>>>>> host_ip_addr=options.host_ip_addr, samp_rate=options.samp_rate,
>>>>>>>> tdecay=options.tdecay, trise=options.trise)
>>>>>>>>   File "rfnoc_fosphor_network_usrp.py", line 43, in __init__
>>>>>>>>     self.device3 = variable_uhd_device3_0 =
>>>>>>>> ettus.device3(uhd.device_addr_t( ",".join(('type=e3x0',
>>>>>>>> "master_clock_rate=%d,fpga=%s" % (samp_rate,fpga_path))) ))
>>>>>>>>   File
>>>>>>>> "/home/root/localinstall/usr/lib/python2.7/site-packages/ettus/ettus_swig.py",
>>>>>>>> line 1307, in make
>>>>>>>>     return _ettus_swig.device3_make(*args, **kwargs)
>>>>>>>> RuntimeError: EnvironmentError: IOError: [0/SplitStream_0]
>>>>>>>> sr_read64() failed: EnvironmentError: IOError: Block ctrl (CE_01_Port_21)
>>>>>>>> no response packet - AssertionError: bool(buff)
>>>>>>>>   in uint64_t ctrl_iface_impl<_endianness>::wait_for_ack(bool,
>>>>>>>> double) [with uhd::endianness_t _endianness = (uhd::endianness_t)1u;
>>>>>>>> uint64_t = long long unsigned int]
>>>>>>>>   at
>>>>>>>> /home/jon/rfnoc_3.14.1.1/src/uhd/host/lib/rfnoc/ctrl_iface.cpp:142
>>>>>>>>
>>>>>>>> This is only occurring when I use the split stream block in RFNoC.
>>>>>>>> I have tried the fixes in [1] but unfortunately they have not helped. Also,
>>>>>>>> fix 1, I can't seem to before b/c I am missing the file
>>>>>>>> rfnoc_ce_auto_inst_<device>.v  as shown from the output when
>>>>>>>> attempting a "find" command in Ubuntu.
>>>>>>>>
>>>>>>>> find: ‘rfnoc_ce_auto_inst_e310.v’: No such file or directory
>>>>>>>>
>>>>>>>> I ran it on both ~/* and /* with no luck.
>>>>>>>>
>>>>>>>> Regards,
>>>>>>>> Jon Lockhart
>>>>>>>>
>>>>>>>> [1]
>>>>>>>> https://kb.ettus.com/RFNoC#Why_do_I_have_a_command_timeout_error.3F
>>>>>>>>
>>>>>>>> _______________________________________________
>>>>>>>> USRP-users mailing list
>>>>>>>> USRP-users at lists.ettus.com
>>>>>>>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>>>>>>>>
>>>>>>> _______________________________________________
>>>>>> USRP-users mailing list
>>>>>> USRP-users at lists.ettus.com
>>>>>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>>>>>>
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