caproto.server.PvpropertyByte¶

class caproto.server.PvpropertyByte(*, pvname: str, group: PVGroup, pvspec: PVSpec, doc: str | None = None, record: str | Type[T_RecordFields] | None = None, logger: Logger | None = None, **kwargs)[source]¶

Read-write 8-bit CHAR data for pvproperty for bytes.

Methods

`auth_read`(hostname, username, data_type, *)	Get DBR data and native data, converted to a specific type
`auth_write`(hostname, username, data, ...[, ...])	Data write hook for clients.
`calculate_length`(value)	Calculate the number of elements given a value
`check_access`(hostname, username)	This always returns `AccessRights.READ\|AccessRights.WRITE`.
`get_field`(field)	Get a field by name.
`is_compatible_array`(value)	Check if the provided value is a compatible array.
`post_state_change`(state, new_value)	This is called by the server when it exits its StateUpdateContext.
`pre_state_change`(state, new_value)	This is called by the server when it enters its StateUpdateContext.
`preprocess_value`(value)	Pre-process values destined for verify_value and write
`publish`(flags)	Publish data to appropriate queues matching the SubscriptionSpec.
`read`(data_type)	The top-level read method, with a specific requested data type.
`subscribe`(queue, sub_spec, sub)	Subscribe a queue for the given subscription specification.
`unsubscribe`(queue, sub_spec)	Unsubscribe a queue for the given subscription specification.
`update_fields`(value)	This is a hook to update field instance data.
`verify_value`(value)	The top-level dbr-facing "write" method.
`write`(value, *[, flags, verify_value, ...])	Write data from native Python types.
`write_from_dbr`(data, data_type, metadata, *)	Write data from a provided DBR data type.
`write_metadata`([publish, units, precision, ...])	Write metadata, optionally publishing information to clients.

Attributes

`alarm`	The ChannelAlarm associated with this data
`data_type`
`default_value`
`epics_timestamp`	EPICS timestamp as (seconds, nanoseconds) since EPICS epoch.
`length`	The number of elements (length) of the current value
`lower_alarm_limit`	Read-only access to lower_alarm_limit data
`lower_ctrl_limit`	Read-only access to lower_ctrl_limit data
`lower_disp_limit`	Read-only access to lower_disp_limit data
`lower_warning_limit`	Read-only access to lower_warning_limit data
`max_length`	The maximum number of elements (length) this channel can hold
`severity`	Alarm severity
`status`	Alarm status
`timestamp`	UNIX timestamp in seconds.
`units`	Read-only access to units data
`upper_alarm_limit`	Read-only access to upper_alarm_limit data
`upper_ctrl_limit`	Read-only access to upper_ctrl_limit data
`upper_disp_limit`	Read-only access to upper_disp_limit data
`upper_warning_limit`	Read-only access to upper_warning_limit data
`value`	Read-only access to value data
`field_inst`
`fields`
`getter`
`group`
`log`
`name`
`putter`
`pvname`
`pvspec`
`record_type`
`scan`
`shutdown`
`startup`
`max_subscription_backlog`