Sequencer procedure

This section provides an easy-to-understand overview of the functions executed in a SweepMe! Module. These functions are forwarded to a Driver if the Module can load drivers.

SweepMe! version 1.5.4 or higher

Sequencer Start:

connect()	For all items from root to leaf: get and open a port object to communicate with a device.
initialize()	For all items from root to leaf: Set values and configurations for devices to prepare for measurement.
If a new branch is entered and the module was not part of the previous branch:
configure()	For all items from root to leaf: Set device configuration.
poweron()	For all items from root to leaf: Powers on the device.
If an item of the sequencer starts its parameter variation:
signin()	Calls reconfigure() if needed. Can be used to perform actions before parameter variation starts.
For each measurement point:
Each step is performed for all items from root to leaf before the next step is started:
start()	Preparation before applying a new value.
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apply()	Only called if the sweep value changes: Sets a new value to a device.
reach()	Only called if apply() was called: Wait to reach the new value or start reaching a certain condition
sleephold()	Sleeps during hold time while set values are applied.
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adapt()	Adapts measurement devices to new conditions.
adapt_ready()	Ensures all devices have adapted.
trigger_ready()	Prepares devices to be triggered.
trigger	Deprecated, continued for a while.
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measure()	Initiates/Triggers a measurement.
request_result()	Requests a result from the device buffer.
read_result()	Reads a result from the port buffer.
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process_data()	Processes measured data after the measurement finishes.
call(	Mandatory: Returns values to SweepMe! as defined by self.variables.
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process()	Deprecated, continued for a while.
finish()	Cleans up before the next measurement.
For each measurement point:
signout()	Optionally performs actions after parameter variation.
Leaving a branch and the module is not part of the next branch or run is stopped by error:
poweroff()	For all items from root to leaf: Switch off modules and devices.
unconfigure()	For all items from root to leaf: Unconfigure modules and devices.
End of sequencer of run is stopped by error
deinitialize()	For all items from root to leaf: Resets the status for any other user of the equipment.
disconnect()	For all items from root to leaf: Closes the port object.

General rules

• At the beginning of a measurement, modules and drivers use connect and initialize. At the end deinitialize and [[disconnect] to bring the module or the driver back to an idle state and to close the connection.
• When a module gets active, i.e. it is part of an active branch, it runs configure and poweron. If a module is not active anymore it runs poweroff and reconfigure.
• At each measurement point, i.e. a combination of setpoint iteration steps of the all modules in a branch, a couple of functions are called to perform the measurement point such as start, apply, reach, adapt, measure, call to name the most important ones.