UPLED LED Driver

April 27, 2023 • 4 min read

Github Link

Thorlabs upLED Driver

This Thorlabs upLED driver can be controlled via USB communication.

Prerequisite

Please download and install the Thorlabs upLED Driver, which installs .dll files necessary to communicate with the upLED driver. This means you'll also need a computer running on Windows OS. Make sure to choose the right 32-bit or 64-bit version.

Example

Below, we provide an example showing you how to communicate with your led driver using a high-level API in python. The API is implemented as a wrapper on top of Thorlabs .dll.

import time
from upLED import TLUP

def main():
    dll_path = "path/to/your/dll/file.dll"  # Replace with the path to your DLL file.

    resource_name = "USB0::0x1313::0x8079::P1000000::INSTR"  # Replace with your upLED driver's resource name. Replace with the path to your DLL file. TLUP_64.dll for 64-bit system and TLUP_32.dll for 32-bit system.
    tlup = TLUP(dll_path)

    # Initialize the upLED driver
    instrument_handle = tlup.init(resource_name, id_query=True, reset_device=True)
    print(f"Initialized upLED driver with handle: {instrument_handle}")

    # Measure device temperature
    device_temperature = tlup.measure_device_temperature(instrument_handle)
    print(f"Measured device temperature: {device_temperature} °C")

    # Enable LED output
    enable_led_output = True
    tlup.switch_led_output(instrument_handle, enable_led_output)
    print(f"Enabled LED output")

    # Set LED current setpoint
    led_current_setpoint = 0.5
    tlup.set_led_current_setpoint(instrument_handle, led_current_setpoint)
    print(f"Set LED current setpoint to {led_current_setpoint} A")

    time.sleep(5)  # Let the LED output be enabled for 5 seconds

    # Disable LED output
    enable_led_output = False
    tlup.switch_led_output(instrument_handle, enable_led_output)
    print(f"Disabled LED output")

    # Close the upLED driver
    tlup.close(instrument_handle)
    print(f"Closed upLED driver with handle: {instrument_handle}")

if __name__ == "__main__":
    main()

This example code does the following:

Imports the necessary modules and the TLUP class from the upLED.py file provided.
Defines a main function that:
- Initializes the upLED driver with the given resource name.
- Measures the device temperature.
- Enables the LED output.
- Sets the LED current setpoint.
- Waits for 5 seconds with the LED output enabled.
- Disables the LED output.
- Closes the upLED driver.

Make sure to replace the dll_path variable with the correct path to your DLL file. Typically, TLUP_64.dll can be found inside C:\Program Files\IVI Foundation\VISA\Win64\Bin\TLUP_64.dll in 64-bit windows system and C:\Program Files (x86)\IVI Foundation\VISA\WinNT\Bin\TLUP_32.dll for 32-bit system. Replace resource_name with your LED driver's resource name.