Re: [Discuss-gnuradio] Auto T/R switching

[Eric Blossom]

On Fri, Jun 30, 2006 at 12:11:38PM -0400, Lee Patton wrote:
> On Tue, 2006-06-20 at 22:51 -0700, Eric Blossom wrote:
> 
> > [set_auto_tr()] is independent of the daughterboards.  
> > The daughterboards that care (right now only the RFX boards), set it
> > up to enable or disable part of the Tx and RX RF paths depending on
> > whether or not there's data to be transmitted in the FPGA fifo.
> > [Certain i/o pins on the RFX boards enable various pieces of h/w on
> > the d'boards]
> 
> How does it determine if there's data to be transmitted in the FPGA
> fifo?  Does it look for all zeros in the fifo, or does it have to do
> with the a transmitter block returning -1?

None of the above.  The FPGA fifo can tell you how full it is.

> I'm trying to transmit from Tx/Rx and receive on Rx2.  This is going
> okay except the transmit data is being repeated over and over, even
> after I return -1 from my transmitter block.

Eric