Hi, Thank you both for your help! :) I had started myself patching UHD for the job like Sylvain did, but that scared me a bit since I didn't want to stump on the feet of the library and risk having some strange behaviour, therefore I preferred to ask first ;) Have a nice day! Rob
On 12 September 2017 at 22:15, Julian Arnold <jul...@elitecoding.org> wrote: > 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 >
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