Re: how to send a group execute trigger with python?

dave,
thanks for your suggestion. it almost worked. the only change I needed to
make was to send the payload as a byte array instead of a string

that is: replace:
string(b)

for:
bytes(b)

cheers


El mié, 6 ago 2025, 04:56, dave penkler <[email protected]> escribió:

> There is no python binding for TriggerList() but you can do it with
> gpib.command(board, string)
> where board is the minor of your adapter and string is composed of the
> unlisten command UNL 0x3f, the listen addresses of the instruments to
> trigger and the GET command 0x08.
> For device addresses 4 and 5 you could do something like:
>
> board = 0
> pad1 = 4
> pad2 = 5
> b = bytearray(4)
> b[0] = 0x3f
> b[1] = 0x20 + pad1
> b[2] = 0x20 + pad2
> b[3] = 0x08
> string = str(b)
> gpib.command(board, string)
>
> On Wed, 6 Aug 2025 at 06:50, Hernán Freschi <[email protected]> wrote:
>
>> I'm using the gpib module in python and I've set up a couple instruments,
>> a 34401A and a 53131A for external triggers.
>>
>> then I trigger them with
>> gpib.trigger(voltmeter)
>> gpib.trigger(counter)
>>
>> this is more than adequate for my application but given that both
>> instruments support GET (group execute trigger) command, I'd like to
>> trigger them this way. But I don't know how to call this from python. The
>> manual for the 34401A mentions:
>>
>> You can also trigger the multimeter from the HP-IB interface by
>> sending the IEEE-488 Group Execute Trigger (GET ) message.
>> The multimeter must be in the wait-for-trigger state. The following
>> statement shows how to send a GET using HP BASIC.
>>
>> TRIGGER 722 Group Execute Trigger
>>
>> How can I do this from Python?
>> _______________________________________________
>> Linux-gpib-general mailing list
>> [email protected]
>> https://lists.sourceforge.net/lists/listinfo/linux-gpib-general
>>
>>

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