def do_scan(self):
start = ur(self.config['Scan']['start']).m_as('V')
stop = ur(self.config['Scan']['stop']).m_as('V')
num_steps = int(self.config['Scan']['num_steps'])
delay = ur(self.config['Scan']['delay'])
self.scan_range = np.linspace(start, stop, num_steps) * ur('V')
self.scan_data = np.zeros(num_steps) * ur('V')
i = 0
for volt in self.scan_range:
self.daq.set_voltage(self.config['Scan']['channel_out'], volt)
measured_voltage = self.daq.get_voltage(
self.config['Scan']['channel_in'])
self.scan_data[i] = measured_voltage
i += 1
sleep(delay.m_as('s'))
def do_scan(self):
if self.is_running:
print('Scan already running')
return
self.is_running = True
start = ur(self.config['Scan']['start']).m_as('V')
stop = ur(self.config['Scan']['stop']).m_as('V')
num_steps = int(self.config['Scan']['num_steps'])
delay = ur(self.config['Scan']['delay'])
self.scan_range = np.linspace(start, stop, num_steps) * ur('V')
self.scan_data = np.zeros(num_steps) * ur('V')
i = 0
self.keep_running = True
for volt in self.scan_range:
if not self.keep_running:
break
self.daq.set_voltage(self.config['Scan']['channel_out'], volt)
measured_voltage = self.daq.get_voltage(
self.config['Scan']['channel_in'])
self.scan_data[i] = measured_voltage
i += 1
sleep(delay.m_as('s'))
self.is_running = False
def get_voltage(self, channel):
""" Retrieve the voltage from the device
Parameters
----------
channel : int
Channel number
Returns
-------
Quantity
The voltage read
"""
voltage_bits = self.driver.get_analog_input(channel)
voltage = voltage_bits * ur('3.3V') / 1023
return voltage
def finalize(self):
""" Set the outputs to 0V and finalize the driver """
self.set_voltage(0, ur('0V'))
self.set_voltage(1, ur('0V'))
self.driver.finalize()
def initialize(self):
""" Initialize the driver and sets the voltage on the outputs to 0 """
self.driver.initialize()
self.set_voltage(0, ur('0V'))
self.set_voltage(1, ur('0V'))
self.driver.set_analog_output(channel, value_int)
def get_voltage(self, channel):
""" Retrieve the voltage from the device
Parameters
----------
channel : int
Channel number
Returns
-------
Quantity
The voltage read
"""
voltage_bits = self.driver.get_analog_input(channel)
voltage = voltage_bits * ur('3.3V') / 1023
return voltage
def __str__(self):
return "Analog Daq"
if __name__ == "__main__":
daq = AnalogDaq('/dev/ttyACM0')
daq.initialize()
voltage = ur('3000mV')
daq.set_voltage(0, voltage)
input_volts = daq.get_voltage(0)
print(input_volts)
daq.finalize()
def __init__(self, config_file):
self.config_file = config_file
self.is_running = False # Variable to check if the scan is running
self.scan_range = np.array([0]) * ur('V')
self.scan_data = np.array([0]) * ur('V')
def initialize(self):
self.driver.initialize()
self.set_voltage(0, ur('0V'))
self.set_voltage(1, ur('0V'))
def get_voltage(self, channel):
voltage_bits = self.driver.get_analog_input(channel)
voltage = voltage_bits * ur('3.3V') / 1023
return voltage
def finalize(self):
self.set_voltage(0, ur('0V'))
self.set_voltage(1, ur('0V'))
self.driver.finalize()
