On 03/19/2018 07:23 PM, Dan CaJacob via USRP-users wrote:
> I seem to recall that the 8-bit OTW format isn't implemented for RFNoC
> yet... I could use that too.
We currently support u8 and sc8 modes for OTW. If your block can do
8-bit samples, UHD will know how to handle that. We also have s8 for
signed, real, 8-bit samples.

-- M

> 
> On Mon, Mar 19, 2018 at 9:07 PM Adam Parower via USRP-users
> <usrp-users@lists.ettus.com <mailto:usrp-users@lists.ettus.com>> wrote:
> 
>     Hello everyone,
> 
> 
>     I am trying to figure out how to receive complex 8-bit integer
>     samples from a USRP containing a custom RFNoC flowgraph. If I didn't
>     require RFNoC and could use the legacy UHD C++ API instead, this
>     would be trivial; I would simply set both the host format and
>     on-the-wire format in my stream arguments to "sc8". However, when I
>     do the same thing in my RFNoC-based application, I get the following
>     error message:
> 
>     Error: RuntimeError: [RX Streamer] Conflicting OTW types defined:
>     args.otw_format = 'sc8' <=> stream_sig.item_type = 'sc16'
> 
> 
>     I understand that the value of stream_sig.item_type comes from the
>     <source> port in the XML block declaration of the block to which my
>     rx_streamer points, but editing the <type> field there does not
>     produce the desired result. To correctly stream 8-bit samples, would
>     I have to, say, implement a custom RFNoC block to repackage 16-bit
>     samples into 8-bit samples at half the sample rate, discarding the 8
>     LSBs? Or is there a simpler way to do this?
> 
> 
>     Thank you in advance for your assistance.
> 
> 
>     Adam Parower
> 
>     _______________________________________________
>     USRP-users mailing list
>     USRP-users@lists.ettus.com <mailto:USRP-users@lists.ettus.com>
>     http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
> 
> -- 
> Very Respectfully,
> 
> Dan CaJacob
> 
> 
> _______________________________________________
> 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

Reply via email to