On Tue, Jan 23, 2018 at 02:11:21AM +0000, Sarah Tran via USRP-users wrote:
> Hi All,
>
> I would like to change the center freq of my UHD Sink depending on who the
> receiver is. So I wrote a custom block that will read what the destination
> mac address is for a packet, and send a message to change the center freq
> based on what destination address it is. This is the format for how I
> write the message:
>
> {
> message_port_register_out(PDU_PORT_ID);
> }
> command = pmt::make_dict();
> command = pmt::dict_add(command, pmt::mp(“freq”),
> pmt::mp(2.412e9));
> command = pmt::dict_add(command, pmt::mp(“chan”),
> pmt::mp(0));
> message_port_pub(PDU_PORT_ID, command);
>
> I saw from other mailing list posts, that this was the syntax they used,
> but I can’t get it to actually the center frequency. Is there something I
> am doing wrong? I am using uhd version 3.10 and GRC version 3.7.11.1.Sarah, this looks fine. Are you sure the messages are being received? Do you see any log statements to that effect? -- Martin
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