[USRP-users] B200 mini chirp generation
michael.west at ettus.com
Mon Mar 14 17:40:26 EDT 2016
There is no need to modify the FPGA. Take a look at the tx_bursts example
for how to send repeated bursts with deterministic timing. Timing is
controlled by setting the time_spec in the tx_metadata_t structure.
On Mon, Mar 14, 2016 at 1:56 PM, Xingjian Chen via USRP-users <
usrp-users at lists.ettus.com> wrote:
> Have you guys try to continuously transmit a Chirp by B200 ? I am using
> tx_samples_from_file.c and coding in FPGA. What I did is that build a
> custom_dsp_tx.v like N210, save the chirp waveform in a register and trying
> to send that. However, my problem now is that I cannot send it
> continuously. (I can send it repeatedly by setting tx_samples_from_file.c.
> But that is not really continuously repeated since cpu timing is not
> deterministic). One point is that the tx signal is controlled by an enable
> signal generated by new_tx_control module. I don't know how to modify that.
> It always leads to "RuntimeError: CODEC loopback test failed."
> Xingjian Chen
> USRP-users mailing list
> USRP-users at lists.ettus.com
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