Re: [Discuss-gnuradio] help: cannot send after transport endpoint shutdown

[Eric Blossom]

On Thu, Jan 29, 2009 at 01:56:43PM +0800, Joreen Tan wrote:
> 
> If i want the usrp to act as both of a transmitter and a receiver at
> one station, meaning i want the usrp to be able to transmit and
> receive at the same time, which file should i activate instead?

Do you want to transmit and receive simultaneously or half-duplex?
I was under the impression that you were trying to do half-duplex.

Take a look at tunnel.py for a half-duplex example.

> I don't understand the following statement "Auto T/R" (Automatic
> Transmit/Receiver switching) handles it for you. With Auto T/R
> enabled, the receiver runs unless there are samples in the Transmit
> FIFO. This is handled in the FGPA", could you provide some sample
> code or example to illustrate how to achieve this

See tunnel.py (it's got a lame MAC, but it demonstrates auto_tr).

Eric