[Discuss-gnuradio] External clock & code best practice (#uhd #clock #n210)

[Guenael JOUCHET]

Hello,

I use an external rubidium reference clock with my N210, everything
works fine with some patchs (python & c++ libs), but I failed with the
conventional way.

I found useful information on this page :
http://files.ettus.com/uhd_docs/manual/html/gpsdo.html
But this command below change nothing :/
  sudo ./usrp_burn_mb_eeprom --args addr=192... --key=gpsdo --val=external

Clock led remains off and the signal sampled is not locked (using for
exemple uhd_rx_cfile, uhd_fft.mod or osmocom_fft)

I solved my problem by patching my python scripts and the osmocom
library, but I wanted to know if I missed something somewhere.


For information, the line added to uhd_rx_cfile : (after the antenna
selection code)
  self._u.set_clock_config(uhd.clock_config.external(), 0)

And for osmocom lib : (uhd_source_c.cc, end of the constructor)
  _src->set_clock_source("external", 0);

Version used :
  FW image : 003.006.002-rc2
  linux; GNU C++ version 4.8.1; Boost_105300; UHD_003.006.002-64-g92b0b7ab

Any feedback appreciated.

Good day, Guenael