def pressureTask(pressureIndex, period):
"""Set the selected pressure channel to a random value every [period] seconds"""
minPressure, maxPressure = fgt_get_pressureRange(pressureIndex)
while not cancellationToken:
pressureOrder = random.random() * maxPressure
fgt_set_pressure(pressureIndex, pressureOrder)
print("task {}: New pressure order: {:.2f} mbar".format(
pressureIndex, pressureOrder))
time.sleep(period)
from __future__ import print_function
import time
from Fluigent.SDK import fgt_init, fgt_close
from Fluigent.SDK import fgt_set_pressure, fgt_get_pressure, fgt_get_pressureRange
## Initialize the session
# This step is optional, if not called session will be automatically
# created
fgt_init()
## Set and read pressure
# Set pressure to 20 mbar on first pressure channel of the list
# mbar is the default unit at initialization
fgt_set_pressure(0, 20)
# Wait 5 seconds for the pressure to settle
print('Waiting 5 seconds...')
time.sleep(5)
# Read pressure value
pressureMeasurement = fgt_get_pressure(0)
print('Current pressure: {}'.format(pressureMeasurement))
## Create a pressure ramp profile
# The ramp goes from device minimal to maximal pressure in 10 steps
# Create the pressure steps
pressureIndex, pressureOrder))
time.sleep(period)
## Initialize the session
# This step is mandatory before starting threads at the same time
fgt_init()
## Create the threads
# Thread 1: drives the first pressure channel (index 0) every 2 seconds
thread1 = Thread(target=pressureTask, args=(0, 2))
# Thread 2: drives the second pressure channel (index 1) every 5 seconds
thread2 = Thread(target=pressureTask, args=(1, 5))
try:
# Start the threads
thread1.start()
thread2.start()
# Wait 10 seconds
time.sleep(10)
finally:
# Stop the threads
cancellationToken = True
thread1.join()
thread2.join()
# Reset pressure on all channels
for pressure_index in range(fgt_get_pressureChannelCount()):
fgt_set_pressure(pressure_index, 0)
## Close the session
fgt_close()
print('Waiting 5 seconds...')
time.sleep(5)
# Read sensor value
sensorMeasurement = fgt_get_sensorValue(0)
print('Current sensor value: {:.2f}'.format(sensorMeasurement))
## Create a sinusoidal profile
# The profile oscillates between the minimum and the maximum sensor value
# Create the sine wave setpoints
amplitude = (maxSensor - minSensor)
offset = minSensor
sinePoints = [(sin(angle * pi / 180) + 1) / 2 for angle in range(0, 360, 10)]
setpoints = [value * amplitude + offset for value in sinePoints]
for sensorSetpoint in setpoints:
# Set new setpoint
print('Set sensor regulation to {:.2f}'.format(sensorSetpoint))
fgt_set_sensorRegulation(0, 0, sensorSetpoint)
# Wait 1 second
time.sleep(1)
# Read sensor value
sensorMeasurement = fgt_get_sensorValue(0)
print('Current sensor value: {:.2f}'.format(sensorMeasurement))
## Close the session
# Set pressure to 0 before closing. This also stops the regulation
fgt_set_pressure(0, 0)
fgt_close()