Re: [Discuss-gnuradio] clock synchronization by message passing
The GPSDO can provide an internal 10 MHz/1 PPS signal. I'm not sure if that's what you meant or not: https://www.ettus.com/product/details/GPSDO-KIT AFIAK, you cannot set the time of a USRP with a message. You may be able to use the XML_RPC block in gr-extras to call the function if it is exposed through gr-uhd. -John On Sun, Jun 16, 2013 at 10:30 AM, Jay Prakash jay.prakash.ec...@itbhu.ac.in wrote: how can we set the time of usrp by sending it message. I know there are function to (usrp.set_time_now()) do this from from top block variable but can this be done by sending message at usrp port . We can give internal reference signal of 10MHz but is there also a way to give pps signal internally i.e. without using any external hardware. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] clock synchronization by message passing
thanks for the clarification so i checked the new grextras wiki it has uhd_control block i guess that can be used for this job. Jay Prakash Senior Undergraduate Electronics Engineering IIT (BHU) VARANASI +91-9559475258 http://about.me/jay.prakash/ http://www.linkedin.com/profile/view?id=91120191trk=hb_tab_pro_top On Sun, Jun 16, 2013 at 11:05 PM, John Malsbury john.malsb...@ettus.comwrote: The GPSDO can provide an internal 10 MHz/1 PPS signal. I'm not sure if that's what you meant or not: https://www.ettus.com/product/details/GPSDO-KIT AFIAK, you cannot set the time of a USRP with a message. You may be able to use the XML_RPC block in gr-extras to call the function if it is exposed through gr-uhd. -John On Sun, Jun 16, 2013 at 10:30 AM, Jay Prakash jay.prakash.ec...@itbhu.ac.in wrote: how can we set the time of usrp by sending it message. I know there are function to (usrp.set_time_now()) do this from from top block variable but can this be done by sending message at usrp port . We can give internal reference signal of 10MHz but is there also a way to give pps signal internally i.e. without using any external hardware. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] clock synchronization by message passing
so i checked the new grextras wiki it has uhd_control block i guess that can be used for this job. uhd_control block supports only a subset of usrp-functions (exposed through gr-uhd) e.g. set_command_time, set/get_gain/freq etc BUT currently it doesn't support set_time_now() https://github.com/guruofquality/grextras/blob/master/lib/uhd_control_port.cpp -Adeel On Sun, Jun 16, 2013 at 11:06 AM, Jay Prakash jay.prakash.ec...@itbhu.ac.in wrote: thanks for the clarification so i checked the new grextras wiki it has uhd_control block i guess that can be used for this job. Jay Prakash Senior Undergraduate Electronics Engineering IIT (BHU) VARANASI +91-9559475258 http://about.me/jay.prakash/ http://www.linkedin.com/profile/view?id=91120191trk=hb_tab_pro_top On Sun, Jun 16, 2013 at 11:05 PM, John Malsbury john.malsb...@ettus.comwrote: The GPSDO can provide an internal 10 MHz/1 PPS signal. I'm not sure if that's what you meant or not: https://www.ettus.com/product/details/GPSDO-KIT AFIAK, you cannot set the time of a USRP with a message. You may be able to use the XML_RPC block in gr-extras to call the function if it is exposed through gr-uhd. -John On Sun, Jun 16, 2013 at 10:30 AM, Jay Prakash jay.prakash.ec...@itbhu.ac.in wrote: how can we set the time of usrp by sending it message. I know there are function to (usrp.set_time_now()) do this from from top block variable but can this be done by sending message at usrp port . We can give internal reference signal of 10MHz but is there also a way to give pps signal internally i.e. without using any external hardware. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] clock synchronization by message passing
so do we have any other block to do that. I did'nt find XML_RPC block in the new gr-extras Jay Prakash Senior Undergraduate Electronics Engineering IIT (BHU) VARANASI +91-9559475258 http://about.me/jay.prakash/ http://www.linkedin.com/profile/view?id=91120191trk=hb_tab_pro_top On Sun, Jun 16, 2013 at 11:43 PM, Adeel Anwar adeela...@gmail.com wrote: so i checked the new grextras wiki it has uhd_control block i guess that can be used for this job. uhd_control block supports only a subset of usrp-functions (exposed through gr-uhd) e.g. set_command_time, set/get_gain/freq etc BUT currently it doesn't support set_time_now() https://github.com/guruofquality/grextras/blob/master/lib/uhd_control_port.cpp -Adeel On Sun, Jun 16, 2013 at 11:06 AM, Jay Prakash jay.prakash.ec...@itbhu.ac.in wrote: thanks for the clarification so i checked the new grextras wiki it has uhd_control block i guess that can be used for this job. Jay Prakash Senior Undergraduate Electronics Engineering IIT (BHU) VARANASI +91-9559475258 http://about.me/jay.prakash/ http://www.linkedin.com/profile/view?id=91120191trk=hb_tab_pro_top On Sun, Jun 16, 2013 at 11:05 PM, John Malsbury john.malsb...@ettus.comwrote: The GPSDO can provide an internal 10 MHz/1 PPS signal. I'm not sure if that's what you meant or not: https://www.ettus.com/product/details/GPSDO-KIT AFIAK, you cannot set the time of a USRP with a message. You may be able to use the XML_RPC block in gr-extras to call the function if it is exposed through gr-uhd. -John On Sun, Jun 16, 2013 at 10:30 AM, Jay Prakash jay.prakash.ec...@itbhu.ac.in wrote: how can we set the time of usrp by sending it message. I know there are function to (usrp.set_time_now()) do this from from top block variable but can this be done by sending message at usrp port . We can give internal reference signal of 10MHz but is there also a way to give pps signal internally i.e. without using any external hardware. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] clock synchronization by message passing
XML_RPC block in the new gr-extras XML_RPC would have been subject to the same limitations. It could only call set_time_next_pps if set_time_next_pps was in the uhd_sink/source blocks. Maybe you can update them to include the function. Let me ask a more fundamental questions - why do you want to reset the time? -John On Sun, Jun 16, 2013 at 11:20 AM, Jay Prakash jay.prakash.ec...@itbhu.ac.in wrote: so do we have any other block to do that. I did'nt find XML_RPC block in the new gr-extras Jay Prakash Senior Undergraduate Electronics Engineering IIT (BHU) VARANASI +91-9559475258 http://about.me/jay.prakash/ http://www.linkedin.com/profile/view?id=91120191trk=hb_tab_pro_top On Sun, Jun 16, 2013 at 11:43 PM, Adeel Anwar adeela...@gmail.com wrote: so i checked the new grextras wiki it has uhd_control block i guess that can be used for this job. uhd_control block supports only a subset of usrp-functions (exposed through gr-uhd) e.g. set_command_time, set/get_gain/freq etc BUT currently it doesn't support set_time_now() https://github.com/guruofquality/grextras/blob/master/lib/uhd_control_port.cpp -Adeel On Sun, Jun 16, 2013 at 11:06 AM, Jay Prakash jay.prakash.ec...@itbhu.ac.in wrote: thanks for the clarification so i checked the new grextras wiki it has uhd_control block i guess that can be used for this job. Jay Prakash Senior Undergraduate Electronics Engineering IIT (BHU) VARANASI +91-9559475258 http://about.me/jay.prakash/ http://www.linkedin.com/profile/view?id=91120191trk=hb_tab_pro_top On Sun, Jun 16, 2013 at 11:05 PM, John Malsbury john.malsb...@ettus.com wrote: The GPSDO can provide an internal 10 MHz/1 PPS signal. I'm not sure if that's what you meant or not: https://www.ettus.com/product/details/GPSDO-KIT AFIAK, you cannot set the time of a USRP with a message. You may be able to use the XML_RPC block in gr-extras to call the function if it is exposed through gr-uhd. -John On Sun, Jun 16, 2013 at 10:30 AM, Jay Prakash jay.prakash.ec...@itbhu.ac.in wrote: how can we set the time of usrp by sending it message. I know there are function to (usrp.set_time_now()) do this from from top block variable but can this be done by sending message at usrp port . We can give internal reference signal of 10MHz but is there also a way to give pps signal internally i.e. without using any external hardware. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] clock synchronization by message passing
I think i can use set_command_time (which i guess set the next time of transmission/command?). how can i make the usrp send its time when configured for synchronization? Jay Prakash Senior Undergraduate Electronics Engineering IIT (BHU) VARANASI +91-9559475258 http://about.me/jay.prakash/ http://www.linkedin.com/profile/view?id=91120191trk=hb_tab_pro_top On Sun, Jun 16, 2013 at 11:58 PM, John Malsbury john.malsb...@ettus.comwrote: XML_RPC block in the new gr-extras XML_RPC would have been subject to the same limitations. It could only call set_time_next_pps if set_time_next_pps was in the uhd_sink/source blocks. Maybe you can update them to include the function. Let me ask a more fundamental questions - why do you want to reset the time? -John On Sun, Jun 16, 2013 at 11:20 AM, Jay Prakash jay.prakash.ec...@itbhu.ac.in wrote: so do we have any other block to do that. I did'nt find XML_RPC block in the new gr-extras Jay Prakash Senior Undergraduate Electronics Engineering IIT (BHU) VARANASI +91-9559475258 http://about.me/jay.prakash/ http://www.linkedin.com/profile/view?id=91120191trk=hb_tab_pro_top On Sun, Jun 16, 2013 at 11:43 PM, Adeel Anwar adeela...@gmail.comwrote: so i checked the new grextras wiki it has uhd_control block i guess that can be used for this job. uhd_control block supports only a subset of usrp-functions (exposed through gr-uhd) e.g. set_command_time, set/get_gain/freq etc BUT currently it doesn't support set_time_now() https://github.com/guruofquality/grextras/blob/master/lib/uhd_control_port.cpp -Adeel On Sun, Jun 16, 2013 at 11:06 AM, Jay Prakash jay.prakash.ec...@itbhu.ac.in wrote: thanks for the clarification so i checked the new grextras wiki it has uhd_control block i guess that can be used for this job. Jay Prakash Senior Undergraduate Electronics Engineering IIT (BHU) VARANASI +91-9559475258 http://about.me/jay.prakash/ http://www.linkedin.com/profile/view?id=91120191trk=hb_tab_pro_top On Sun, Jun 16, 2013 at 11:05 PM, John Malsbury john.malsb...@ettus.com wrote: The GPSDO can provide an internal 10 MHz/1 PPS signal. I'm not sure if that's what you meant or not: https://www.ettus.com/product/details/GPSDO-KIT AFIAK, you cannot set the time of a USRP with a message. You may be able to use the XML_RPC block in gr-extras to call the function if it is exposed through gr-uhd. -John On Sun, Jun 16, 2013 at 10:30 AM, Jay Prakash jay.prakash.ec...@itbhu.ac.in wrote: how can we set the time of usrp by sending it message. I know there are function to (usrp.set_time_now()) do this from from top block variable but can this be done by sending message at usrp port . We can give internal reference signal of 10MHz but is there also a way to give pps signal internally i.e. without using any external hardware. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] clock synchronization by message passing
how can i make the usrp send its time when configured for synchronization? I might be misunderstanding the question, but here's an answer. The USRP source outputs stream tags on the first sample when streaming. The three tags are 1) rx_time 2) rx_rate 3) frequency. Using (1) and (2), you should be able to determine and track the time of the USRP. You would use set_command_time for anything with commands - gpio, tuning, etc. This is in the control plane. You do timed bursts in the data plane with stream tags - tx_sob, tx_time, tx_eob. If these terms are foreign to you, Google introduction to stream tags by Tom R. -John On Sun, Jun 16, 2013 at 12:02 PM, Jay Prakash jay.prakash.ec...@itbhu.ac.in wrote: I think i can use set_command_time (which i guess set the next time of transmission/command?). how can i make the usrp send its time when configured for synchronization? Jay Prakash Senior Undergraduate Electronics Engineering IIT (BHU) VARANASI +91-9559475258 http://about.me/jay.prakash/ http://www.linkedin.com/profile/view?id=91120191trk=hb_tab_pro_top On Sun, Jun 16, 2013 at 11:58 PM, John Malsbury john.malsb...@ettus.comwrote: XML_RPC block in the new gr-extras XML_RPC would have been subject to the same limitations. It could only call set_time_next_pps if set_time_next_pps was in the uhd_sink/source blocks. Maybe you can update them to include the function. Let me ask a more fundamental questions - why do you want to reset the time? -John On Sun, Jun 16, 2013 at 11:20 AM, Jay Prakash jay.prakash.ec...@itbhu.ac.in wrote: so do we have any other block to do that. I did'nt find XML_RPC block in the new gr-extras Jay Prakash Senior Undergraduate Electronics Engineering IIT (BHU) VARANASI +91-9559475258 http://about.me/jay.prakash/ http://www.linkedin.com/profile/view?id=91120191trk=hb_tab_pro_top On Sun, Jun 16, 2013 at 11:43 PM, Adeel Anwar adeela...@gmail.comwrote: so i checked the new grextras wiki it has uhd_control block i guess that can be used for this job. uhd_control block supports only a subset of usrp-functions (exposed through gr-uhd) e.g. set_command_time, set/get_gain/freq etc BUT currently it doesn't support set_time_now() https://github.com/guruofquality/grextras/blob/master/lib/uhd_control_port.cpp -Adeel On Sun, Jun 16, 2013 at 11:06 AM, Jay Prakash jay.prakash.ec...@itbhu.ac.in wrote: thanks for the clarification so i checked the new grextras wiki it has uhd_control block i guess that can be used for this job. Jay Prakash Senior Undergraduate Electronics Engineering IIT (BHU) VARANASI +91-9559475258 http://about.me/jay.prakash/ http://www.linkedin.com/profile/view?id=91120191trk=hb_tab_pro_top On Sun, Jun 16, 2013 at 11:05 PM, John Malsbury john.malsb...@ettus.com wrote: The GPSDO can provide an internal 10 MHz/1 PPS signal. I'm not sure if that's what you meant or not: https://www.ettus.com/product/details/GPSDO-KIT AFIAK, you cannot set the time of a USRP with a message. You may be able to use the XML_RPC block in gr-extras to call the function if it is exposed through gr-uhd. -John On Sun, Jun 16, 2013 at 10:30 AM, Jay Prakash jay.prakash.ec...@itbhu.ac.in wrote: how can we set the time of usrp by sending it message. I know there are function to (usrp.set_time_now()) do this from from top block variable but can this be done by sending message at usrp port . We can give internal reference signal of 10MHz but is there also a way to give pps signal internally i.e. without using any external hardware. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] clock synchronization by message passing
I went through the stream tagging pdf. The tags from source has time,freq and rate. I am interested in insuring that transmitter sets a particular frequency of transmission ie Tx_Next_freq and time at which the transmitter starts sending data packets at an instance. The set_command_time as you suggested should work. I see the features being implemented in Pre-cog.Can I get a heading of how has these two features been insured? The sole purpose of my questions is setting a synchronized frequency hopping and unbroken data transfer at these hopping channels. I have a set of TX frequencies [f1,f2,..fn] and Receiver two has the knowledge of the frequency table. Now I have a file and want to send certain chunks at different frequencies and insure Receiver receives them without error. For this Receiver will have to be synchronized with Tx and hop instances of rx/tx should not be lagging. Setting time of transmission/freq hop from tx side and getting rx_time info from tags can help in establishing the channel I want. Please help me figuring out the synchronization with respect to Pre-cog implementation. Jay Prakash On Mon, Jun 17, 2013 at 12:43 AM, John Malsbury john.malsb...@ettus.comwrote: how can i make the usrp send its time when configured for synchronization? I might be misunderstanding the question, but here's an answer. The USRP source outputs stream tags on the first sample when streaming. The three tags are 1) rx_time 2) rx_rate 3) frequency. Using (1) and (2), you should be able to determine and track the time of the USRP. You would use set_command_time for anything with commands - gpio, tuning, etc. This is in the control plane. You do timed bursts in the data plane with stream tags - tx_sob, tx_time, tx_eob. If these terms are foreign to you, Google introduction to stream tags by Tom R. -John On Sun, Jun 16, 2013 at 12:02 PM, Jay Prakash jay.prakash.ec...@itbhu.ac.in wrote: I think i can use set_command_time (which i guess set the next time of transmission/command?). how can i make the usrp send its time when configured for synchronization? Jay Prakash Senior Undergraduate Electronics Engineering IIT (BHU) VARANASI +91-9559475258 http://about.me/jay.prakash/ http://www.linkedin.com/profile/view?id=91120191trk=hb_tab_pro_top On Sun, Jun 16, 2013 at 11:58 PM, John Malsbury john.malsb...@ettus.comwrote: XML_RPC block in the new gr-extras XML_RPC would have been subject to the same limitations. It could only call set_time_next_pps if set_time_next_pps was in the uhd_sink/source blocks. Maybe you can update them to include the function. Let me ask a more fundamental questions - why do you want to reset the time? -John On Sun, Jun 16, 2013 at 11:20 AM, Jay Prakash jay.prakash.ec...@itbhu.ac.in wrote: so do we have any other block to do that. I did'nt find XML_RPC block in the new gr-extras Jay Prakash Senior Undergraduate Electronics Engineering IIT (BHU) VARANASI +91-9559475258 http://about.me/jay.prakash/ http://www.linkedin.com/profile/view?id=91120191trk=hb_tab_pro_top On Sun, Jun 16, 2013 at 11:43 PM, Adeel Anwar adeela...@gmail.comwrote: so i checked the new grextras wiki it has uhd_control block i guess that can be used for this job. uhd_control block supports only a subset of usrp-functions (exposed through gr-uhd) e.g. set_command_time, set/get_gain/freq etc BUT currently it doesn't support set_time_now() https://github.com/guruofquality/grextras/blob/master/lib/uhd_control_port.cpp -Adeel On Sun, Jun 16, 2013 at 11:06 AM, Jay Prakash jay.prakash.ec...@itbhu.ac.in wrote: thanks for the clarification so i checked the new grextras wiki it has uhd_control block i guess that can be used for this job. Jay Prakash Senior Undergraduate Electronics Engineering IIT (BHU) VARANASI +91-9559475258 http://about.me/jay.prakash/ http://www.linkedin.com/profile/view?id=91120191trk=hb_tab_pro_top On Sun, Jun 16, 2013 at 11:05 PM, John Malsbury john.malsb...@ettus.com wrote: The GPSDO can provide an internal 10 MHz/1 PPS signal. I'm not sure if that's what you meant or not: https://www.ettus.com/product/details/GPSDO-KIT AFIAK, you cannot set the time of a USRP with a message. You may be able to use the XML_RPC block in gr-extras to call the function if it is exposed through gr-uhd. -John On Sun, Jun 16, 2013 at 10:30 AM, Jay Prakash jay.prakash.ec...@itbhu.ac.in wrote: how can we set the time of usrp by sending it message. I know there are function to (usrp.set_time_now()) do this from from top block variable but can this be done by sending message at usrp port . We can give internal reference signal of 10MHz but is there also a way to give pps signal internally i.e. without using any external hardware. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org
Re: [Discuss-gnuradio] clock synchronization by message passing
On 06/16/2013 02:13 PM, Adeel Anwar wrote: so i checked the new grextras wiki it has uhd_control block i guess that can be used for this job. uhd_control block supports only a subset of usrp-functions (exposed through gr-uhd) e.g. set_command_time, set/get_gain/freq etc BUT currently it doesn't support set_time_now() https://github.com/guruofquality/grextras/blob/master/lib/uhd_control_port.cpp I didnt add every possible setting. But I am happy to add more on request! I'm gathering that someone would like to make a configuration and control block that could perform the synchronization tasks w/ a GPSDO or some external clock and time source. The intention of the UHDControlPort block was to help clean up much of the messy control logic in pre-cog. We were passing messages into a python block that was executing python functions onto the flowgraph. Sure it worked though :-) But now there is an API to do configuration and control nicely. My intention with the UHDControlPort was to allow for frequency hopping control in a programatic way (and other stuff too). The UHDControlPort block uses the property interface to expose device properties that can be set by another entity -- like some sort of configuration block. https://github.com/guruofquality/gras/wiki/Properties So lets say the control block intended to frequency hop and perform a new transmission: 1) This control block would find the UHDControlPort in the element tree (you would probably do this once in the notify_active() callback). 2) The control block calls uhd_control_block-set(command_time, t0); uhd_control_block-set(tx_freq, new_freq); 3) The control block now causes a time-tagged message to be sent to the transmit chain. control_block - packet_framer - modulator - usrp_sink The time of the transmission would be t0 + some delta to allow the command of tuning the frontend to have settle time. -josh ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] clock synchronization by message passing
On 06/16/2013 10:44 PM, Josh Blum wrote: On 06/16/2013 02:13 PM, Adeel Anwar wrote: so i checked the new grextras wiki it has uhd_control block i guess that can be used for this job. uhd_control block supports only a subset of usrp-functions (exposed through gr-uhd) e.g. set_command_time, set/get_gain/freq etc BUT currently it doesn't support set_time_now() https://github.com/guruofquality/grextras/blob/master/lib/uhd_control_port.cpp I didnt add every possible setting. But I am happy to add more on request! I'm gathering that someone would like to make a configuration and control block that could perform the synchronization tasks w/ a GPSDO or some external clock and time source. OK, exposed access to time source, clock source, and time registers. Use it in good health! https://github.com/guruofquality/grextras/commit/341f351159961acc0bb6e46402e9ed28d618cd64 -josh ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] clock synchronization by message passing
Josh, I didnt add every possible setting. But I am happy to add more on request! I'm gathering that someone would like to make a configuration and control block that could perform the synchronization tasks w/ a GPSDO or some external clock and time source. I think it will also be very useful to add set_rate() get_rate. This will help in dynamic re-configuration of Tx-RX Bandwidth to/from USRP. USRP source/sink blocks already generates a tag on sampling-rate change . Thanks, Adeel On Mon, Jun 17, 2013 at 8:40 AM, Josh Blum j...@joshknows.com wrote: On 06/16/2013 10:44 PM, Josh Blum wrote: On 06/16/2013 02:13 PM, Adeel Anwar wrote: so i checked the new grextras wiki it has uhd_control block i guess that can be used for this job. uhd_control block supports only a subset of usrp-functions (exposed through gr-uhd) e.g. set_command_time, set/get_gain/freq etc BUT currently it doesn't support set_time_now() https://github.com/guruofquality/grextras/blob/master/lib/uhd_control_port.cpp I didnt add every possible setting. But I am happy to add more on request! I'm gathering that someone would like to make a configuration and control block that could perform the synchronization tasks w/ a GPSDO or some external clock and time source. OK, exposed access to time source, clock source, and time registers. Use it in good health! https://github.com/guruofquality/grextras/commit/341f351159961acc0bb6e46402e9ed28d618cd64 -josh ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
