def set_trigger(self,
channel_name,
threshold=0.,
direction='RISING',
is_enabled=True,
delay=0,
auto_trigger=0):
"""Set the oscilloscope trigger condition.
:param channel_name: the source channel for the trigger (e.g. 'A')
:param threshold: the trigger threshold (in V)
:param direction: the direction in which the signal must move to cause
a trigger
:param is_enabled: (boolean) enable or disable the trigger
:param delay: the delay between the trigger occuring and the start of
capturing data, in number of sample periods
:param auto_trigger: the maximum amount of time to wait for a trigger
before starting capturing data in miliseconds
The direction parameter can take values of 'ABOVE', 'BELOW', 'RISING',
'FALLING' or 'RISING_OR_FALLING'.
"""
channel = _get_channel_from_name(channel_name)
threshold = self._rescale_V_to_adc(channel_name, threshold)
direction = _get_trigger_direction_from_name(direction)
assert_pico_ok(
ps.ps3000aSetSimpleTrigger(self._handle, is_enabled, channel,
threshold, direction, delay,
auto_trigger))
def setTrigger(self,
channel,
enable=1,
threshold=1024,
direction=3,
delay=0,
autoTrigger_ms=5000):
# Sets up single trigger
# Handle = Chandle
# Source = ps3000A_channel_B = 0
# Enable = 0
# Threshold = 1024 ADC counts
# Direction = ps3000A_Falling = 3
# Delay = 0
# autoTrigger_ms = 1000
self.status["trigger"] = ps.ps3000aSetSimpleTrigger(
self.chandle, channel, enable, threshold, direction, delay,
autoTrigger_ms)
assert_pico_ok(self.status["trigger"])
# enabled = 1 # coupling type = PS3000A_DC = 1 # range = PS3000A_10V = 8 # analogue offset = 0 V chARange = 8 status["setChA"] = ps.ps3000aSetChannel(chandle, 0, 1, 1, chARange, 0) # Sets up single trigger # Handle = Chandle # Enable = 0 # Source = ps3000A_channel_A = 0 # Threshold = 1024 ADC counts # Direction = ps3000A_Falling = 3 # Delay = 0 # autoTrigger_ms = 1000 status["trigger"] = ps.ps3000aSetSimpleTrigger(chandle, 1, 0, 1024, 3, 0, 1000) # Setting the number of sample to be collected preTriggerSamples = 40000 postTriggerSamples = 40000 maxsamples = preTriggerSamples + postTriggerSamples # Create buffers ready for assigning pointers for data collection bufferAMax = (ctypes.c_int16 * maxsamples)() bufferAMin = (ctypes.c_int16 * maxsamples)() # Setting the data buffer location for data collection from channel A # Handle = Chandle # source = ps3000A_channel_A = 0 # Buffer max = ctypes.byref(bufferAMax) # Buffer min = ctypes.byref(bufferAMin)