Remote communication error

[Andrew Cagney]

> Hi,
> 
> I set up a remote debug using USB port. I got some message like: Remote
> communication error: Connection timed out. And this can happen at the
> begin of the debug or after I already did some debug commands. But the
> whole remote debug works fine for the serial port. I think I didn't add
> USB interface correctly. Could anyone point me which code related to the
> remote communication error, and why this happens? 
> 
> Thanks a lot 

That it works with a simple serial device and not USB suggests a bug in 
the kernel or h/w.  GDB (assuming this is with a standard GDB) uses 
identical code to drive both devices.

You can use "(gdb) set debug serial" to see exactly what GDB is doing 
when it hangs.

ANdrew