def do_scan(self):
"""Does a scan of an analog output while recording an analog input. It doesn't take any arguments,
it relies on having the proper properties set in the dictionary properties['Scan']
"""
self.running_scan = True
start = Q_(self.properties['Scan']['start'])
stop = Q_(self.properties['Scan']['stop'])
step = Q_(self.properties['Scan']['step'])
port_in = self.properties['Scan']['port_in']
port_out = self.properties['Scan']['port_out']
delay = Q_(self.properties['Scan']['delay'])
self.stop_scan = False
units = start.u
stop = stop.to(units)
num_points = (stop - start) / step
num_points = int(num_points.m_as(''))
scan = np.linspace(start, stop, num_points + 1)
self.xdata_scan = scan
self.ydata_scan = np.zeros((num_points + 1))
i = 0
for value in scan:
if self.stop_scan:
break
value = value * units
self.daq.set_analog_value(port_out, value)
sleep(delay.m_as('s'))
data = self.read_analog(port_in).m_as('V')
self.ydata_scan[i] = data
i += 1
self.running_scan = False
def do_scan(self):
"""Does a scan of an analog output while recording an analog input. It doesn't take any arguments,
it relies on having the proper properties set in the dictionary properties['Scan']
"""
if self.running_scan:
raise Warning('Trying to start a second scan')
start = Q_(self.properties['Scan']['start'])
stop = Q_(self.properties['Scan']['stop'])
step = Q_(self.properties['Scan']['step'])
channel_in = self.properties['Scan']['channel_in']
channel_out = self.properties['Scan']['channel_out']
delay = Q_(self.properties['Scan']['delay'])
units = start.u
stop = stop.to(units)
num_points = (stop - start) / step
num_points = round(num_points.m_as('')) + 1
scan = np.linspace(start, stop, num_points) * units
self.xdata_scan = scan
self.ydata_scan = np.zeros(num_points) * units
i = 0
self.running_scan = True
for value in scan:
self.daq.set_analog_value(int(channel_out), value)
sleep(delay.m_as('s'))
self.ydata_scan[i] = self.daq.get_analog_value(int(channel_in))
i += 1
self.running_scan = False