nitsm-python

Write code modules with the TestStand Semiconductor Module in python.

Note to End Users

This project is intended for use in automated device validation. Our primary focus is to provide a pythonic approach to automated testing with TestStand and TSM. More emphasis has been placed on simplicity and usability than execution time.

Python Version Support

nitsm supports python versions 3.6, 3.7, 3.8, 3.10, and 3.11. Newer versions of python might work, but it is not guaranteed. Python 2.7 is not supported.

Installation

pip install nitsm

nitsm requires NI TestStand 20.0 or higher and NI TestStand Semiconductor Module 20.0 or higher.

To use nitsm in conjunction with nimi-python, you must also install the appropriate NI instrument driver for each device you plan to use:

• NI-DCPower 20.6+
• NI-DMM
• NI-SCOPE
• NI-Digital
• NI-SWITCH
• NI-DAQmx
• NI-FGEN

Visit the nimi-python project for information on which python packages to install alongside each instrument driver.

Usage

Define code modules with the code_module decorator in the nitsm.codemoduleapi module. When called from TestStand, the decorator will convert the pywin32 COM object into an nitsm.codemoduleapi.SemiconductorModuleContext object.

import nidcpower
import nitsm.codemoduleapi

@nitsm.codemoduleapi.code_module
def source_current(tsm_context, pins, current_level):
    pin_query_context, sessions, channel_strings = tsm_context.pins_to_nidcpower_sessions(pins)
    for session, channel_string in zip(sessions, channel_strings):
        session.channels[channel_string].output_function = nidcpower.OutputFunction.DC_CURRENT
        session.channels[channel_string].current_level = current_level
        session.channels[channel_string].initiate()

Known Limitations

• Instrument alarms are currently not supported
• The Set Relays TestStand step is not supported when creating relay sessions in python
• See STATUS.md for additional information about the current state of the API and system tests