Dear Munir, Your experiment confirms my theory: you cannot drive a single USRP from two applications.
You need a custom application. I am no expert on Gnuradio, but I very much doubt you can achieve your objective with it. You should try writing a C/C++ application (or python with the new API if performance is not a major concern). Claudio On 08/25/2017 09:44 AM, Muhammad Munir wrote: > Dear Claudio, > Thanks for the reply. > I connected a single USRP with two PCs and tried to access USRP using two > different host PCs. When a USRP is engaged with one host, the other can not > get access to USRP. It means, we can access USRP by a single host at a > time. > The problem with the solution you suggested is that Gnuradio support for > communication between two applications is only through TCP or UDP which is > not reliable. I connected the application as given in figure. It gives USRP > underflow or overflow error. (UUUUUUUUUUUUUU or DDDDDDDDDDDD). > > Regards: > Munir > > > On Fri, Aug 25, 2017 at 12:16 PM, Claudio Cicconetti < > cciccone...@mbigroup.it> wrote: > >> Dear Muhammad, >> 1. Yes, it is possible to connect an N200 to a switch, then you can use >> any PC connected to that as the host for the USRP device. Just make sure >> the switch is GbE (1000 Mb/s), not Fast Ethernet (10/100 Mb/s). Note >> that this approach has been discouraged by Ettus in the past for a >> number of reasons, but it works in practice. >> >> 2. No, it is not possible for multiple applications to use the same USRP >> device, regardless of whether they reside in the same host or in >> different hosts in a LAN. >> >> If you really need to access the same USRP (any series) from two >> applications, then you have to use a "broker": a single application >> drives the USRP, then it dispatches/receives data via network or any >> other mechanism (shared memory, whatever) to/from other applications, >> possibly on different hosts. This solution is 100% in your hands: AFAIK >> there are not examples from Ettus on this. >> >> Note: the N200 has a single ADC/DAC, therefore I am assuming you have in >> mind some kind of TDD operation. >> >> Ciao, >> Claudio >> >> On 08/25/2017 07:41 AM, Muhammad Munir via USRP-users wrote: >>> Hi, >>> The USRP N200 has two channels. I want data of each channel to two >>> different computers (PCs). There is only one Ethernet connection is >>> available with USRP. My questions are >>> 1. Is it possible to connect a single USRP with two different PCs >> connected >>> on a same network through Ethernet switch? >>> 2. Is it possible to stream two channels of USRP to two different PCs? >>> Please Let me know the solution? >>> >>> Thanks in advance >>> Muhammad Munir >>> >>> >>> >>> _______________________________________________ >>> USRP-users mailing list >>> USRP-users@lists.ettus.com >>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >>> >> >> > _______________________________________________ USRP-users mailing list USRP-users@lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
