MLCSlowController Class Reference
[Modules]

Inheritance diagram for MLCSlowController:

List of all members.

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Detailed Description

to be done

Author:

sergio.didomizio@ge.infn.it

The purpose of this module is to handle parallelization in the load curves procedure.

• Config example:

      module LCSlowController
      verbosity = info
      enable = true
      InitBias = 1.543
      InitGain = 448
      InitResistance = 54
      GroupSize = 10
      SleepAfterChange = 10
      BiasStep = 0.1
      StepMode = log
      endmod
      

• Parameters
  • InitBias [ float = 0.]: Value for the partition of internal bias system. This value ranges from 0 to 10 and remains the same for the whole load curves procedure. The real bias voltage is given by InitBias/10*ExternalBias, where ExternalBias is the external bias voltage (in volts), that is different for each load curve point.
  • InitGain [ float = 448]: Initial gain
  • InitResistance [float = 54]: Initial load resistance in GOhm. Valid values are 54 and 10.86
  • GroupSize [ int = 10 ]: Number of channel to process in each load curves group
  • SleepAfterChange [ int = 10 ]: Time in seconds to wait after each change in electronics
  • BiasStep [ double = 0.1 ]: external bias step size in V (distance between curve points)
  • StepMode [ string = log ] Select the way external bias is increased (linear or logarithmic). Allowed values are "lin" and "log". This variable controls the number of steps (each of size BiasStep) that will be used to increment external bias. In case of lin, the number of step is always one. In case of log, the number of steps is given by the integer part of the current external bias in V.

Public Member Functions
	MLCSlowController (QSequence *s)
	constructor
virtual	~MLCSlowController ()
	destructor
void	Init ()
	Init method.
QEvent *	Do (QEvent *ev)
	return immediately if there are still measurements to be performed with current electronics configuration, or prepare new configuration if there are no channels that are still waiting for a measurement with current one
void	Done ()
	Done method.
Private Types
enum	QLCStepMode { QLC_STEP_LINEAR, QLC_STEP_LOG }
Private Member Functions
void	GroupChannels (const std::list< unsigned short > &channels)
	group logical channels in subgroups
void	InitConfig (QLCSlowConfig &conf, const bool polarity)
	init QLCMeasConfig object with default front end settings values
void	GetInitParameters ()
	get parameters for first measurement from config file (or elsewhere). See config example for the list of init parameters
virtual bool	PopulateNextConfig ()
	determine electronics configuration for next set of measurements and apply to hardware
bool	IncrementExternalBias (int step=0)
	increment or decrement external bias
float	GetExtBiasStepSize () const
	get step size (in Volts) for external bias incrementation
void	SetExtBiasStepSize (const float size)
	set step size (in Volts) for external bias incrementation
Private Attributes
std::vector< std::list< unsigned short > >	fGroups
	vector of logical channel subgroups. Each element is in turn a list of logical channels belonging to a given subgroup
short	fDefaultBias
short	fDefaultGain
bool	fDefaultResistance
float	fExtBiasStepSize
float	fDefaultExternalBias
bool	fAdjustOffsetAtStartup
QLCStepMode	fStepMode
	step mode, defaults to QLC_STEP_LOG

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Member Enumeration Documentation

enum MLCSlowController::QLCStepMode [private]

possible modes for external bias voltage incrementation

Enumerator:

QLC_STEP_LINEAR	bias voltage is incremented by the same amount at each step
QLC_STEP_LOG	the smaller the bias voltage, the smaller the incrementation step size

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Member Function Documentation

void MLCSlowController::Init

(

)

[virtual]

Init method.

This method reads init values from cfg, create channel groups to be processed at each iteration of the load curves sequence and initialize the QLCSlowConfigHandler singleton.

Implements QModule.

void MLCSlowController::GroupChannels

(

const std::list< unsigned short > &

channels

)

[private]

group logical channels in subgroups

Parameters:

channels

list of all logical channels to be grouped

channels are grouped in ascending order and with the group size specified in the cfg file

void MLCSlowController::InitConfig	(	QLCSlowConfig &	conf,
		const bool	polarity
	)			[private]

init QLCMeasConfig object with default front end settings values

Parameters:

	conf	QLCMeasConfig object to be initialized (passed by reference)
	polarity	bias polarity to be set in new configuration

bool MLCSlowController::PopulateNextConfig

(

)

[private, virtual]

determine electronics configuration for next set of measurements and apply to hardware

Returns:

false unless all curves are done and the measurement can be stopped

bool MLCSlowController::IncrementExternalBias

(

int

step = 0

)

[private]

increment or decrement external bias

Parameters:

step

number of step for incrementation, defaults to 0 (automatic). Step size is set by calling SetExtBiasStepSize(). Positive values will increase external bias, while negative values will decrement it. In case of 0 number of steps is determined automatically based on the value of the variable fStepMode.

Returns:

true on success, false on failure

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Member Data Documentation

short MLCSlowController::fDefaultBias [private]

bias voltage used for 1st measurement

short MLCSlowController::fDefaultGain [private]

gain used for 1st measurement

bool MLCSlowController::fDefaultResistance [private]

load resistance used for 1st measurement

float MLCSlowController::fExtBiasStepSize [private]

external bias incrementation step size in V

bool MLCSlowController::fAdjustOffsetAtStartup [private]

if true the offset is adjusted at the startup to the value hardcoded in QLCSlowConfigHandler::ApplyConfig()

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The documentation for this class was generated from the following files:

• /usr/local/cuore/pkg/moddaq/MLCSlowController.hh
• /usr/local/cuore/pkg/moddaq/MLCSlowController.cc

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