Re: [Discuss-gnuradio] usrp intraction with gnuradio

[sh.sharma]

Hi Nick & Jeremy,
 Thanks for your genius guide and it was very helpful from my side in
clearing the doubts.
And sorry i was a bit busy in some other work so was not able to post
quickly...

Right now i want to use thinkRF as baseboard for my purpose instead of
USRP...
 so what change i have to done in gnuradio 
And how i can i configure my system
to run usrp_rx_cfile with thinkRF as thinkRF_rx_cfile...

---can be --- as
what i have to make changes in the usrp_rx_cfile for thinkRF, so as it gives
me the cfile


I highly apologizes for any improper question or improper information...
thanks...   



Jeremy Quirke wrote:
> 
> There is no "code" that transfers data to/from the FPGA to the Cypress.
> 
> It is a purely a hardware transaction.
> 
> To be strictly correct, the USRP makes use of the programmable GPIF
> interface of the Cypress EZUSB, the programming of the GPIF is done in the
> *gpif*.c files. See chapter 10 of the EZUSB literature. The data is copied
> in/from the EZUSB FIFOs which are written/read by USB transfers. See
> usrp_main.c for the loop that sets up read/write transfers.
> 
> Regards,
> Jeremy
> 
> 
> 
> 
> 
>> -----Original Message-----
>> From: address@hidden
>> [mailto:address@hidden On Behalf
>> Of sh.sharma
>> Sent: Friday, 29 April 2011 4:19 PM
>> To: address@hidden
>> Subject: Re: [Discuss-gnuradio] usrp intraction with gnuradio
>> 
>> 
>> Hi Nick,
>>  Thanks for your geniune guide and it was very helpful from my side in
>> clearing the doubts which i had in my mind regarding the usrp block.
>> 
>> And i apologize again for the  confusion created by my other part of
>> the
>> post.
>> What i wanted to know is that , when  data got transfered from FPGA to
>> the
>> Cyprex chip , my doubt is that , is there any involvement of the c++
>> code in
>> transferring data from FPGA to Cyprex and vice versa.And if c++ code is
>> not
>> involved in the transaction then , .rbf file should have automatically
>> doing
>> that... I just wanted to know what part of the C++ code is used in the
>> data
>> transfer from fpga to cyprex chip.
>> 
>> and just want to confirm that data form cyprex is recived by libusb
>> function
>> "usb_bulk_read" called in "read" function of "fusb_ephandle_generic"
>> class
>> in a buff string & send to the usrp_source...
>> 
>> i apologize if my question is still not clear enough.
>> thanks
>> 
>> 
>> 
>> Nick Foster-4 wrote:
>> >
>> > On Wed, 2011-04-27 at 23:19 -0700, sh.sharma wrote:
>> >> sorry for insufficient information for my previous post i highly
>> >> apologize
>> >> for that ...
>> >>
>> >> what i wanted to ask was that...
>> >> i am trying to understand gnuradio & i want to know which part of
>> >> gnuradio
>> >> initially receive data from usrp...
>> >> I means , where in the gnuradio code does the work of actual reading
>> the
>> >> fifo in the Cyprex Fx2 USB with the help
>> >> of the libusb and the libpcap library...
>> >>
>> >> In trying to understand the my problem, i  start tracing
>> usrp_rx_cfile...
>> >> some of the work i have done & track a function named usb_bulk_read
>> >> called
>> >> in read function of fusb_ephandle_gfeneric class...
>> >> i think it reads data from usb(cyprex) part of USRP...
>> >> but i want to know that which part of the code in gnuradio/USRP
>> block
>> >> code
>> >> put the data in that cyprex part , and if this is automatically done
>> by
>> >> the
>> >> hardware board, then where is the code that is involve in this
>> >> transaction..
>> >
>> > If you're asking about the older gr-usrp drivers, then:
>> >
>> > gnuradio/usrp contains the driver that talks USB to the USRP, and the
>> > firmware and FPGA code that run on the USRP itself.
>> >
>> > gnuradio/gr-usrp contains the bridge that gets USRP data from the
>> driver
>> > into Gnuradio.
>> >
>> > The USRP has a Cypress FX2 USB controller which uses the GPIF
>> interface
>> > to talk to the Cyclone FPGA and read data from it. The firmware to
>> > control the FX2 is in the gnuradio/usrp/firmware directory. The
>> Cyclone
>> > FPGA code is in gnuradio/usrp/fpga. The firmware on the FX2 isn't
>> smart
>> > enough to do anything but SPI, I2C transfers, etc. so all the control
>> > and tuning logic is in the host side driver, in gnuradio/usrp/host.
>> >
>> >>
>> >> 1. my current objective is to know about the complete data path of
>> >> USRP--->rx_cfile....
>> >> i want to get the part from that the C++ takes control...
>> >>
>> >> 2. Or is it some of the important part id done other than C++ (means
>> >> verilog, matlab etc..) or these languages work only like drivers of
>> >> USRP...
>> >
>> > If you describe what you're trying to do, we might be able to give
>> you
>> > more specific suggestions.
>> >
>> > --n
>> >
>> >>
>> >> Thanks for any help...
>> >> & i highly apologize for any incorrect or illogical question...
>> >>
>> >>
>> >>
>> >> Nick Foster-4 wrote:
>> >> >
>> >> > On Wed, 2011-04-27 at 06:33 -0700, sh.sharma wrote:
>> >> >> How usrp intract with gnuradio...
>> >> >> data is sent by usrp to gnuradio
>> >> >>
>> >> >> or
>> >> >>
>> >> >> how gnuradio usrp block intract withgnuradio-core
>> >> >
>> >> > If you ask good, detailed questions about specific Gnuradio
>> topics, you
>> >> > will get good, detailed answers about specific Gnuradio topics.
>> >> > Otherwise, you'll get replies like this.
>> >> >
>> >> > --n
>> >> >
>> >> >
>> >> > _______________________________________________
>> >> > Discuss-gnuradio mailing list
>> >> > address@hidden
>> >> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>> >> >
>> >> >
>> >>
>> >
>> >
>> >
>> > _______________________________________________
>> > Discuss-gnuradio mailing list
>> > address@hidden
>> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>> >
>> >
>> 
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