You may be better served by cross-posting this to the discuss-gnuradio
mailing list, where there may be more users of gr-radar than here.
Generally, a "late command" isn't a fatal error. What it basically
means is that the *application* (gr-radar) asked for a "timed" command,
but was unable to deliver that command before the time requested.
On 2022-01-05 04:29, mobizmn--- via USRP-users wrote:
I am trying to use the USRP echotimer block from gr-radar module. But
when I run the flowgraph containing this block, I get the following error:
|[INFO] [UHD] linux; GNU C++ version 7.5.0; Boost_106501;
UHD_3.15.0.0-70-g42b6fcf6|
|[INFO] [B200] Detected Device: B210|
|[INFO] [B200] Operating over USB 2.|
|[INFO] [B200] Initialize CODEC control...|
|[INFO] [B200] Initialize Radio control...|
|[INFO] [B200] Performing register loopback test... |
|[INFO] [B200] Register loopback test passed|
|[INFO] [B200] Performing register loopback test... |
|[INFO] [B200] Register loopback test passed|
|[INFO] [B200] Setting master clock rate selection to 'automatic'.|
|[INFO] [B200] Asking for clock rate 16.000000 MHz... |
|[INFO] [B200] Actually got clock rate 16.000000 MHz.|
|Using USRP Device (TX): |
|Single USRP:|
|Device: B-Series Device|
|Mboard 0: B210|
|RX Channel: 0|
|RX DSP: 0|
|RX Dboard: A|
|RX Subdev: FE-RX2|
|RX Channel: 1|
|RX DSP: 1|
|RX Dboard: A|
|RX Subdev: FE-RX1|
|TX Channel: 0|
|TX DSP: 0|
|TX Dboard: A|
|TX Subdev: FE-TX2|
|TX Channel: 1|
|TX DSP: 1|
|TX Dboard: A|
|TX Subdev: FE-TX1|
|Setting TX Rate: 2000000|
|[INFO] [B200] Asking for clock rate 32.000000 MHz... |
|[INFO] [B200] Actually got clock rate 32.000000 MHz.|
|Actual TX Rate: 2e+06|
|[INFO] [USRP2] Opening a USRP2/N-Series device...|
|[INFO] [USRP2] Current recv frame size: 1472 bytes|
|[INFO] [USRP2] Current send frame size: 1472 bytes|
|[WARNING] [UHD] Unable to set the thread priority. Performance may be
negatively affected.|
|Please see the general application notes in the manual for instructions.|
|EnvironmentError: OSError: error in pthread_setschedparam|
|Using USRP Device (RX): |
|Single USRP:|
|Device: USRP2 / N-Series Device|
|Mboard 0: N210r4|
|RX Channel: 0|
|RX DSP: 0|
|RX Dboard: A|
|RX Subdev: WBXv3 RX+GDB|
|TX Channel: 0|
|TX DSP: 0|
|TX Dboard: A|
|TX Subdev: WBXv3 TX+GDB|
|Setting RX Rate: 2000000|
|Actual RX Rate: 2e+06|
|set_min_output_buffer on block 1 to 2400|
|set_min_output_buffer on block 2 to 2400|
|terminate called after throwing an instance of 'std::runtime_error'|
|what(): Receiver error ERROR_CODE_LATE_COMMAND|
My transmit device is USRP B210 and the receiver is USRP N210. The
settings of the USRP Echotimer block are attached. What could be
causing this error?
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