On 19/10/2011 12:41 PM, xi yang wrote:
Hi, Marcus and Sean,
I'm a little bit confused by the relationship between UHD and gnuradio.
I thought we can use either UHD or gnuradio, just UHD provides some
unique interfaces for the products from Ettus.
Do you mean that our old ofdm codes that work on USRP1 cannot be used
anymore?
We are working on Non-Contiguous OFDM and our previous codes can
disable some subcarriers on USRP1.
Because we want to do FFT on FPGA, we change to use USRP E100, but
codes on the host are useless now?
In the "old days" prior to about 2 years ago, the USRP2 and USRP1
devices (all that existed at the time) had their own individual APIs, and
applications/examples were written *knowing* which interface type
they were using.
Then along came UHD, which provides a universal API for all of Ettus'
devices, and gr-uhd is the little piece of "glue" that glues Gnu Radio
to the UHD device stack.
But hardly anyone converted their examples to use UHD, and that task is
now being done by Tom Rondeau and others.
Further, some of the new devices, notably E100, B100, N2XX, and newer
daughtercards are only available with a UHD driver interface.
So any applications/examples that haven't been ported to using UHD
cannot work with non-UHD devices, and the E100 USRP-type device
only "speaks" UHD.
The "next" branch has examples that have been converted to use UHD,
which should "just work" on your E100 platform. Although not
all the examples have been converted yet.
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