Hey, In case you haven't already adopted the straight forward approach mentioned by Sylvain I just dug out the tool I mentioned and moved it to my github account [1].
I quickly compiled and linked against a recent version of UHD (3.9.6) to confirm that it still works. Build as usual: mkdir build cd build cmake .. make You can then run the "main" program as follows: ./main --list to see a list of all available filters with their corresponding paths. Then, you can write new filter coefficients with: ./main --write_fir --path=<path from run with --list option> e.g.: ./main --write_fir --path=/mboards/0/dboards/A/rx_frontends/A/filters/FIR_1 this will update the coefficients of FIR_1 and then read the filter again to check if the coefficients have been updated. However, the tool is definitely not polished in any way and does not check whether or not the new coefficients actually take effect. If they still don't then let me know and I'll try to create a more complete example application. [1] https://github.com/jarn0ld/uhd-filter-tool Cheers, Julian On Tuesday, September 12, 2017 5:16:56 PM CEST Sylvain Munaut wrote: > Personally I'm using a patched UHD where I expose the SPI device : > > > diff --git a/host/lib/usrp/b200/b200_impl.cpp > b/host/lib/usrp/b200/b200_impl.cpp index a513e1336..01c1e3b51 100644 > --- a/host/lib/usrp/b200/b200_impl.cpp > +++ b/host/lib/usrp/b200/b200_impl.cpp > @@ -549,6 +549,8 @@ b200_impl::b200_impl(const uhd::device_addr_t& > device_addr, usb_device_handle::s > _adf4001_iface = boost::make_shared<b200_ref_pll_ctrl>(_spi_iface); > } > > + _tree->create<spi_iface::sptr>(mb_path / ("spi")).set(_spi_iface); > + > //////////////////////////////////////////////////////////////////// > // Init codec - turns on clocks > //////////////////////////////////////////////////////////////////// > > > Then in my code I can get the SPI object : > > uhd::spi_iface::sptr spi = > usrp->get_device()->get_tree()->access<uhd::spi_iface::sptr>("/mboards/0/spi > ").get(); > > and use read_spi / write_spi to control any register I want. > > > Cheers, > > Sylvain -- Julian Arnold, M.Sc. Institute for Networked Systems RWTH Aachen University Kackertstrasse 9 52072 Aachen Germany _______________________________________________ USRP-users mailing list USRP-users@lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
