Re: [Linux-gpib-general] GPIB device development

[Richard K. <ric...@gm...>]

Hello Dave

Ah okay....so how is the expected communication flow actually?

>From my understanding it looks like the controller ends his part after the
MTA5 command, which tells device 5 to respond...

So can the device just begin transferring data with last byte EOI set or
does the device also needs
to send those MTA/MLA as well prepending the payload?


thanks in advance
richard


Am Fr., 19. Juni 2020 um 09:48 Uhr schrieb dave penkler <dpe...@gm...
>:

> Hi Richard,
> ibterm by default tries to read a response after a send but will not
> report an error on timeout of the read.
> cheers,
> -Dave
>
> On Thu, 18 Jun 2020, 10:52 Richard Klingler, <ric...@gm...>
> wrote:
>
>> Good morning (o;
>>
>> As I decided to develop a GPIB device based on STM32F MCU I did a first
>> setup based on a Nucleo-F207ZG board with attached 75160/161 transceivers...
>>
>> In my test code I just check for DAV and set NRFD and NDAC accordingly....
>>
>> Interestingly...when I send for example a *IDN? query to my test device,
>> which doesn't send back any data (not yet ;o), I don't get any errors in
>> ibterm....so is this normal that ibterm doesn't wait for data and just
>> closes the communication?
>>
>> Currently I just send out the received commands/Data out the USB CDC
>> device...
>>
>> Sending *IDN? I get in my USB console:
>>
>> CMD: 40
>> CMD: 3F
>> CMD: 25
>> DAT: *
>> DAT: I
>> DAT: D
>> DAT: N
>> DAT: ?
>> CMD: 3F
>> CMD: 20
>> CMD: 45
>>
>> Or does it misread EOI and therefore closes the communication?
>>
>>
>> thanks in advance
>> richard
>>
>>
>>
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