pcdsdevices.digitizers.Qadc

class pcdsdevices.digitizers.Qadc(*args, **kwargs)

Class for older qadc, based on Abaco FMC126.

Ophyd Device Components

Attribute	Class	Suffix	Docs	Kind	Notes
ch0	EpicsSignalRO	:CH0		normal	Inherited from QadcBase
ch1	EpicsSignalRO	:CH1		normal	Inherited from QadcBase
ch2	EpicsSignalRO	:CH2		normal	Inherited from QadcBase
ch3	EpicsSignalRO	:CH3		normal	Inherited from QadcBase
config	EpicsSignal	:CONFIG		config	Inherited from QadcBase
gain0_i	EpicsSignal	:GAIN0_I		omitted
gain0_ni	EpicsSignal	:GAIN0_NI		omitted
gain1_i	EpicsSignal	:GAIN1_I		omitted
gain1_ni	EpicsSignal	:GAIN1_NI		omitted
gain2_i	EpicsSignal	:GAIN2_I		omitted
gain2_ni	EpicsSignal	:GAIN2_NI		omitted
gain3_i	EpicsSignal	:GAIN3_I		omitted
gain3_ni	EpicsSignal	:GAIN3_NI		omitted
ichan	EpicsSignal	:ICHAN		config
interleave	EpicsSignal	:INTERLEAVE		config
length	EpicsSignal	:LENGTH		config
off0_i	EpicsSignal	:OFF0_I		omitted
off0_ni	EpicsSignal	:OFF0_NI		omitted
off1_i	EpicsSignal	:OFF1_I		omitted
off1_ni	EpicsSignal	:OFF1_NI		omitted
off2_i	EpicsSignal	:OFF2_I		omitted
off2_ni	EpicsSignal	:OFF2_NI		omitted
off3_i	EpicsSignal	:OFF3_I		omitted
off3_ni	EpicsSignal	:OFF3_NI		omitted
out	EpicsSignalRO	:OUT		normal
rawdata	EpicsSignalRO	:RAWDATA		normal
start	EpicsSignal	:START		normal
train	EpicsSignal	:TRAIN		omitted
trig_delay	EpicsSignal	:TRIG_DELAY		config
trig_event	EpicsSignal	:TRIG_EVENT		config

Methods

configure(d: Dict[str, Any]) → Tuple[Dict[str, Any], Dict[str, Any]]

Configure the device for something during a run

This default implementation allows the user to change any of the configuration_attrs. Subclasses might override this to perform additional input validation, cleanup, etc.

Parameters:

d (dict) – The configuration dictionary. To specify the order that the changes should be made, use an OrderedDict.

Returns:

• (old, new) tuple of dictionaries

• Where old and new are pre- and post-configure configuration states.

describe() → OrderedDictType[str, Dict[str, Any]]

Provide schema and meta-data for read().

This keys in the OrderedDict this method returns must match the keys in the OrderedDict return by read().

This provides schema related information, (ex shape, dtype), the source (ex PV name), and if available, units, limits, precision etc.

Returns:

data_keys (OrderedDict) – The keys must be strings and the values must be dict-like with the event_model.event_descriptor.data_key schema.

get(**kwargs)

Get the value of all components in the device

Keyword arguments are passed onto each signal.get(). Components beginning with an underscore will not be included.

post_elog_status()

Post device status to the primary elog, if possible.

read() → OrderedDictType[str, Dict[str, Any]]

Read data from the device.

This method is expected to be as instantaneous as possible, with any substantial acquisition time taken care of in trigger().

The OrderedDict returned by this method must have identical keys (in the same order) as the OrderedDict returned by describe().

By convention, the first key in the return is the ‘primary’ key and maybe used by heuristics in bluesky.

The values in the ordered dictionary must be dict (-likes) with the keys {'value', 'timestamp'}. The 'value' may have any type, the timestamp must be a float UNIX epoch timestamp in UTC.

Returns:

data (OrderedDict) – The keys must be strings and the values must be dict-like with the keys {'value', 'timestamp'}

read_configuration() → OrderedDictType[str, Dict[str, Any]]

Dictionary mapping names to value dicts with keys: value, timestamp

To control which fields are included, change the Component kinds on the device, or modify the configuration_attrs list.

screen()

Open a screen for controlling the device.

Default behavior is the typhos screen, but this method can be overridden for more specialized screens.

status() → str

Returns a str with the current pv values for the device.

stop(*, success=False)

Stop the Device and all (instantiated) subdevices

summary()

trigger() → StatusBase

Trigger the device and return status object.

This method is responsible for implementing ‘trigger’ or ‘acquire’ functionality of this device.

If there is an appreciable time between triggering the device and it being able to be read (via the read() method) then this method is also responsible for arranging that the StatusBase object returned by this method is notified when the device is ready to be read.

If there is no delay between triggering and being readable, then this method must return a StatusBase object which is already completed.

Returns:

status (StatusBase) – StatusBase object which will be marked as complete when the device is ready to be read.

Attributes

configuration_attrs

connected

hints

kind

subscriptions: ClassVar[FrozenSet[str]] = frozenset({'acq_done'})