Re: Fwd: Fwd: Agilent 82350b can't recover from read timeout?

Frank Mori Hess <[email protected]>
Newsgroups gmane.linux.hardware.gpib.general
Message-ID <CAJz5OpdUHcALebt7WUrZisN_hivzwr4-LwPJZD2VoHzihULc1A@mail.gmail.com> 
On Wed, Jul 31, 2019 at 8:08 PM Dirk Niggemann <[email protected]> wrote:
> I thought the issue was directly related to the particular device because i originally triggered the issue by sending an invalid command to the board.
> You don't actually need to send anything- just reading from the device without sending anything is sufficient,
>

Yeah, attempting a read that fails will leave the board out of the
ANRS state, causing tcs to fail.  Try modifying tms9914_aux.c by
changing tms9914_take_control so that it immediately returns
-ETIMEDOUT if "synchronous" is true.   So basically, you want to make
sure it never writes AUX_TCS to the  AUXCR register.
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