Messages in this thread | | | Subject | Re: [PATCH v3 3/4] counter: Add character device interface | From | David Lechner <> | Date | Mon, 22 Jun 2020 09:08:48 -0500 |
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On 6/21/20 2:53 PM, William Breathitt Gray wrote: > Synapses simply indicate a change in a Count value
Ah, ok. I understand now that synapse is the wrong term for things like the change in direction event or error events.
> For example, in the dual-axes positioning table scenario, a user > application would likely want to know the exact X and Y position at the > time of a given event -- that means an event should provide two Count > values (and possibly associated device flags) when it occurs. I'm not > sure yet how the struct counter_event should be defined in order to > support this; we will need to indicate the format of data as well as > provide the data itself. Perhaps, we can handle this by providing an > unique id field so that only a single datum (e.g. a single count value) > is provided via the value field, but subsequent struct counter_event > items share the same id so that the user knows that a particular datum > is part of a larger group of data for a specific event.
The timestamp could act as the "id" to correlate multiple values of a single event.
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