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implement a "baton IOC" #63

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tacaswell opened this issue May 15, 2019 · 0 comments

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tacaswell commented May 15, 2019

Write a (caproto) IOC to hold a "baton" string.

The idea is that:

at init the bsui "takes the baton" by writing a unique key to the IOC
at call time the RE (via a pre-processor) checks that it "still has the baton" (that is its key is still in the baton PV), if not fail to start
provide a method that will "steal the baton" to get control of the beamline again

For complex beamlines with more that one end station shared hardware it may be worth generalizing to a baton per shared Device / endstation.

xref bluesky/bluesky#17

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