Hi Eesa I am not sure if this will help, but in some of our code where we reuse the USRP in another thread, I only create the handle once and pass that to both threads (instead of calling multi_usrp::make in each thread), something like: uhd::usrp::multi_usrp::sptr pUSRP = uhd::usrp::multi_usrp::make(strUSRPArgs); cTXClass tx(pUSRP); cRXClass rx(pUSRP);
Regards Leon From: eesa.nik...@gmail.com <eesa.nik...@gmail.com> Date: Thursday, 08 June 2023 at 07:56 To: usrp-users@lists.ettus.com <usrp-users@lists.ettus.com> Subject: [USRP-users] Creating TX usrp and RX usrp objects using Two different threads using X310 You don't often get email from eesa.nik...@gmail.com. Learn why this is important<https://aka.ms/LearnAboutSenderIdentification> [The e-mail server of the sender could not be verified (SPF Record)] Hi dears, I created a TX usrp an RX usrp object (using uhd::usrp::multiusrp::make()) using two different threads. When I try to set subdevice for them the first thread can set subdevice successfully but hte later fails to set it and throw an excption with this error message: "Error: map::at". (Example setting=> TX subdev=A:0, antenna=TX/RX; RX subdev=A:0 (or B:0), antenna= RX2) If I comment the methods to set subdevice for the later thread (e.g. for RX: rx_usrp->set_rx_subdev_spec("B:0")) my code works correctly. I wonder why this problem is for! As UHD examples such as txrx_loopback_tofile, set subdevice for both TX and RX separately and it works fine. The only difference between this example and mine is that I am using two different threads. It is worth noting that my code works correctly for N200 usrp. My UHD version is "UHD 4.3.0.0.-0g1f8fd345" Can anyone help me to resolve this issue? Thank you. Eesa
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