pylab_ml.smu.tti.base_tti.TTI

class TTI(**kwargs)

Bases: create_attributes, Measure

Baseclass Interface to the TTI Power Supply Instruments.

The TTI baseclass can connect to TTI Power Supply instruments

ask=inst.query('

READ?’) write and read the answer

__init__(**kwargs)

Connect and initialize.

Parameters:

• addr (int) – interface address

• interface (Interface) – gpib, usbserial

• backend (str) – visa backend is either ‘@ni’ for NI-Library or ‘@py’ for pure python pyvisa-py backend. On default it uses ‘@ni’ on win32 and ‘@py’ on other platforms.

Example: Initialization

>>> instrument = TTI(addr=24)   # GPIB or USB address
>>> instrument.init()           # connect and initialize instrument

Methods

__init__(**kwargs)	Connect and initialize.
clear()	Clear error status.
close([force])	Close connection to instrument.
createattributes(dictionary[, parent, ...])	Create attributes or methods from a dictionary.
errmsg()	Read Execution Error Register.
find_names()	find_names() returns list of identifiers strings, lhs of = assignments
help()
identify([showInstName])	Identify message.
init([identify])	Connect to TTI instrument and initialize.
local()	Switch back to local instrument control.
message([message])	Device has no display, message display to logger.info.
mfilter(input)
mqtt_add(client, instrument[, liste, qos])	Add the instrument to mqtt.
mqtt_disconnect()	Remove the instrument from mqtt.
publish(topic, value)	Publish topic as type='cmd' with paylad=value.
publish_get(function_name, value)	Publish function_name as type='get' with paylad=value.
publish_set(function_name, value)	Publish function_name as type='set' with paylad=value.
read()	Read the instruent directly.
reset()	Reset and switch beep off.
setup_inst()	Start setup instrument settings, called from class instruments.
write(cmd)	Write direct to instrument.

Attributes

channel	Set/get channel number if the instrument have more than one channel.
command
current	Measure DC current of actual Channel.
i_clamp	Set the current clamping (A) of actual Channel.
id	Query IDN.
instName	Return with instname or instname[ch] if it has channels.
interchoices	Abstract for static class variable interchoices, to list interfaces statically.
measurecnt	Set/get the number of measurement to be carried out in a loop.
mqtt_enable
mqtt_list
mqtt_status	Getter for the mqtt_status.
ocp	Get/Set over current protection trip point at x Amps.
onoff	Get/Set the Output-State of actual Channel.
ovp	Get/Set over voltage protection trip point at x Volts.
sense	Get/Set sense.
state	Get/Set Standard Event Status Enable Register.
voltage	Get/Set voltage.
ATTR_ERROR	if something wrong with your called methode, than set the result to self.ATTR_ERROR
attrLast	last set/get attribute name.
attrLastvalue	last set attribute value.

ATTR_ERROR

if something wrong with your called methode, than set the result to self.ATTR_ERROR

class Sense(value)

Bases: Enum

Enum for Sense control.

local = 0

value for sense mode = local

remote = 1

value for sense mode = remote

attrLast

last set/get attribute name.

attrLastvalue

last set attribute value.

property channel

Set/get channel number if the instrument have more than one channel.

you can also use:

>>> vdd[0].voltage = 5           # set voltage from channel 0
>>> vdd[1].current = 0.1         # set current from channel 1
>>> v = vdd[1].voltage           # measure voltage from channel 1

clear()

Clear error status.

close(force=False)

Close connection to instrument.

createattributes(dictionary, parent=None, child=None, childname='')

Create attributes or methods from a dictionary.

syntax from the dictionary see example in the class documentation.

Parameters:

dictionary (dict) – {attribute/methode name : (Device command for read/write) , range, call functions}.

Returns:

None.

property current

Measure DC current of actual Channel.

errmsg()

Read Execution Error Register.

find_names()

find_names() returns list of identifiers strings, lhs of = assignments

property i_clamp

Set the current clamping (A) of actual Channel.

property id

Query IDN.

identify(showInstName=False)

Identify message.

init(identify=False)

Connect to TTI instrument and initialize.

property instName

Return with instname or instname[ch] if it has channels.

abstract property interchoices

Abstract for static class variable interchoices, to list interfaces statically.

json = <module 'json' from '/home/runner/miniconda3/envs/test/lib/python3.9/json/__init__.py'>

local()

Switch back to local instrument control.

property measurecnt

Set/get the number of measurement to be carried out in a loop.

TODO: this function is not running yet, it is only a dummy

if the result == None than this function not implemented. The return value for the measurement is calculated togetheer with the mfilter setting.

message(message=None)

Device has no display, message display to logger.info.

mqtt_add(client, instrument, liste='#', qos=0)

Add the instrument to mqtt.

calling from base_instrument, after the instrument (device) has been create. Normally you have not to use this function, only base_instrument use it.

Returns:

None.

mqtt_disconnect()

Remove the instrument from mqtt.

calling from base_instrument, if the instrument are closing. Normally you have not to use this function, only base_instrument use it.

Returns:

None.

property mqtt_status

Getter for the mqtt_status.

property ocp

Get/Set over current protection trip point at x Amps.

property onoff

Get/Set the Output-State of actual Channel.

0 = Output off

1 = Output on

property ovp

Get/Set over voltage protection trip point at x Volts.

publish(topic, value)

Publish topic as type=’cmd’ with paylad=value.

publish_get(function_name, value)

Publish function_name as type=’get’ with paylad=value.

publish_set(function_name, value)

Publish function_name as type=’set’ with paylad=value.

read()

Read the instruent directly.

reset()

Reset and switch beep off.

property sense

Get/Set sense.

‘local’ = Local sensing (2-Wire)

‘remote’ = Remote sensing (4-Wire)

setup_inst()

Start setup instrument settings, called from class instruments.

property state

Get/Set Standard Event Status Enable Register.

see QL355T Instruction Manual for more details

property voltage

Get/Set voltage.

write(cmd)

Write direct to instrument.

Example: send command reset :

>>> inst.write('*RST')