caproto.ioc_examples.mirror.Mirror

class caproto.ioc_examples.mirror.Mirror(*args, target, **kwargs)

Subscribe to a PV and serve its value.

The default prefix is mirror:.

Mirror pvproperties

Attribute	Suffix	Docs	Type	Notes	Alarm Group
value	value		float	Read-only Startup

Methods

group_read(instance)	Generic read called for channels without get defined
group_write(instance, value)	Generic write called for channels without put defined

Attributes

default_values
type_map
type_map_read_only
pvdb
attr_pvdb
attr_to_pvname
groups

pvproperty methods

value.startup(self, instance, async_lib)

Source code: value.startup

    @value.startup
    async def value(self, instance, async_lib):
        # Note that the asyncio context must be created here so that it knows
        # which asyncio loop to use:
        self.client_context = Context()

        self.pv, = await self.client_context.get_pvs(self.target)

        # Subscribe to the target PV and register self._callback.
        self.subscription = self.pv.subscribe(data_type='time')
        self.subscription.add_callback(self._callback)