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<== Date ==> <== Thread ==>
Subject: asynDriver - update record (timestamp), on no change
From: Joao Afonso via Tech-talk <[email protected]>
To: "[email protected]" <[email protected]>
Date: Thu, 28 Feb 2019 17:16:39 +0000
Hello,

I have an asyn driver IOC that periodically receives new data, updates the parameters (and timestamps), and runs the callbacks for the "I/O Intr" records.

It has an extra thread that runs something like this:

while(1)
{
    int value = wait_for_data();
    setIntegerParam(dev_addr, param_id, value)
    updateTimeStamp();
    callParamCallbacks(dev_addr);
}

However, 'callParamCallbacks' will not update the record timestamp if the value received keeps being the same.
From what I understand, this is the intended behaviour of asynDriver - no updates if data is the same -, but I would like to know if there a way to enforce it (to update the record timestamp)?

One possible solution I think will work is to update the parameter with a random value first, to trigger the 'new data' flag, but it feels like an hack...

Example:
setIntegerParam(dev_addr, param_id, 0)
setIntegerParam(dev_addr, param_id, value)


Thank you,
Joao Afonso
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