Re: [Discuss-gnuradio] Auto T/R Switching with Inband code

[George Nychis]

Ketan Mandke wrote:
> After doing some further testing, it seems that using
> "inband_2rxhb_2tx.rbf" allowed us to properly do automatic t/r
> switching (even with the use of just one channel). We could not get
> this functionality working correctly with "inband_1rxhb_1tx.rbf".
> Maybe this rbf was not rebuilt after applying whatever fixes George
> was referring to? Anyway, thanks a lot for your help.

OK so I had interest in this, and I think Brian and I understand why 
Auto T/R switching does not quite work right with the inband code.  For 
it to switch to the RX chain, tx_empty must be asserted.  However, this 
is a little bit of a misnomer with the in-band code because if you have 
a packet in the TX buffer pending on its timestamp, tx_empty is low 
since there really is something in the TX chain... but it's not 
transmitting!  That's the problem.  I am working on fixing up some of 
these things now.

- George