HI All, I'm running the same setup as last time I emailed-4 X310s, 1gig ethernet, Ubuntu 17.04, UHD 3.96 and GNU Radio 3.7.12. My flowgraph is 8 complex inputs into a USRP sink, and I can attach it if need be. Each input is a some wave of different frequency, at a 2M sample rate.
Anyways, the new flowgraph solved the previous problem of not even starting and freezing almost immediately. However this one has 3 different errors that I can't pinpoint. I never get them at the same time, but i get them each about half of the time whenever I execute the flowgraph in grc or call top_block.py from the terminal. Here are the two errors copied and pasted below. [WARNING] [X300] x300_dac_ctrl: front-end sync failed. unexpected FIFO depth [0x0] Or thread[thread-per-block[24]: <block gr uhd usrp sink (1)>]: RuntimeError: x300_dac_ctrl: front-end sync failed. unexpected FIFO depth [0x0] The 0x0 can be other hex values too, like 0x7 for example. The first error, it doesn't transmit but keeps running while on the second it just fails entirely. Note-I am not using RFNoC, it just a normal imahe downloaded with uhd_images_downloader The other error is: terminate called after throwing an instance of 'uhd::io_error' what(): EnvironmentError: IOError: [1/DmaFIFO_0] sr_read64() failed: EnvironmentError: IOError: Block ctrl (CE_00_Port_30) no response packet - AssertionError: bool(buff) in uint64_t ctrl_iface_impl::wait_for_ack(bool) at /home/mcl-sdvlc/prefix/default_prefix/src/uhd/host/lib/rfnoc/ctrl_iface.cpp:197 While I know the top one is a FPGA error, I'm not sure what the second is. Finally, when it does run, sometimes one of the USRPs is not transmitting or not transmitting on both channels, though there are no error messages. Thanks,Rich
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