It works by setting tx-blockid to 0/Radio_0 and tx-chan to 1. I think there is only one radio in E312 but two channels for tx and two channels for rx. Here is a reference below.
http://ettus.80997.x6.nabble.com/USRP-users-RFNoC-Radio-Select-B-E312-E310-and-GPSDO-td8395.html James ________________________________ From: USRP-users <usrp-users-boun...@lists.ettus.com> on behalf of Xingjian Chen via USRP-users <usrp-users@lists.ettus.com> Sent: Wednesday, January 9, 2019 10:37:20 PM To: USRP-users@lists.ettus.com Subject: [USRP-users] Fw: E312 rfnoc_radio_loopback.cpp FPGA image Dear all, I am working on the rfnoc_radio_loopback.cpp example in the latest UHD repository on my E312. This loopback example seems requires two radio blocks. May I know how to build the FPGA image to have two radios blocks on the device such as Radio_0 and Radio_1? Currently, I can build an image with only one radio by the following common: ./uhd_image_builder.py window fft -d e310 -t E310_RFNOC_sg3 -m 5 --fill-with-fifos Is there any existed image I should download for this rfnoc_radio_loopback example for E312? Thank you. James
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