Hi, On the X310, the crossbar is limited to 16 ports. Of the 16 ports, only 10 are available because the other 6 are already occupied: 2x 10GigE, 1x PCIe, 2x Radio Core RFNoC blocks, 1x DmaFIFO RFNoC block.
Jonathon On Thu, Apr 4, 2019 at 11:03 PM Jason Matusiak via USRP-users < usrp-users@lists.ettus.com> wrote: > I don't know why this would be, but it almost feels like a hex issue > somewhere. Where are you setting the block size to 10? It feels like > something is interpreting that as 0x10, and I think 16 is a magic number > that is too large. > > ------------------------------ > *From:* USRP-users <usrp-users-boun...@lists.ettus.com> on behalf of > Armin Schmidt via USRP-users <usrp-users@lists.ettus.com> > *Sent:* Thursday, April 4, 2019 4:13 AM > *To:* USRP-users@lists.ettus.com > *Subject:* [USRP-users] Maximal number of RFNoC-blocks > > Hallo everyone and Ettus development team, > > We use uhd 3.14 rc1 and we have the strange behaviour, that after the > magic number of 10 RFNoC-blocks on the FPGA, we get the following error: > > [ERROR] [UHD] Exception caught in safe-call. > in ctrl_iface_impl<_endianness>::~ctrl_iface_impl() [with > uhd::endianness_t _endianness = (uhd::endianness_t)0u] > at /home/gab2/rfnoc/src/uhd/host/lib/rfnoc/ctrl_iface.cpp:60 > this->send_cmd_pkt(0, 0, true); -> EnvironmentError: IOError: Block ctrl > (CE_13_Port_00) 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)0u; uint64_t = > long unsigned int] > at /home/gab2/rfnoc/src/uhd/host/lib/rfnoc/ctrl_iface.cpp:155 > > terminate called after throwing an instance of 'uhd::io_error' > what(): EnvironmentError: IOError: Block ctrl (CE_00_Port_30) packet > parse error - EnvironmentError: IOError: Expected SID: 02:30>00:00 > Received SID: 00:12>02:00 > Aborted (core dumped) > > It is not a problem of the FPGA-Capacity and also not a timing issue. So > it seems to be somehow a hardcoded limit from ettus. Does someone know how > to stretch this limit? So 10 RFNoC-blocks works just fine, but with 12 we > get this error! It is also not dependant of the type of blocks, we put on > the FPGA. > > Many thanks for your help! > > Armin Schmidt > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >
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