Fix AI_start_delay_ticks logic so it actually works.

Author: dihm

labscript_devices/NI_DAQmx/blacs_tabs.py

@@ -192,6 +192,7 @@ def initialise_GUI(self):
                     'AI_term': properties['AI_term'],
                     'AI_range': properties['AI_range'],
                     'AI_start_delay': properties['AI_start_delay'],
+                    'AI_start_delay_ticks': properties['AI_start_delay_ticks'],
                     'clock_terminal': clock_terminal,
                 },
             )

labscript_devices/NI_DAQmx/blacs_workers.py

@@ -534,9 +534,9 @@ def transition_to_buffered(self, device_name, h5file, initial_values, fresh):
             self.buffered_chans = sorted(set(chans), key=split_conn_AI)
         self.h5_file = h5file
         self.buffered_rate = device_properties['acquisition_rate']
-        if device_properties['AI_start_delay'] == None:
+        if device_properties['start_delay_ticks']:
             # delay is defined in sample clock ticks
-            self.AI_start_delay = device_properties['AI_start_delay_ticks']*self.buffered_rate
+            self.AI_start_delay = self.AI_start_delay_ticks*self.buffered_rate
         self.acquired_data = []
         # Stop the manual mode task and start the buffered mode task:
         self.stop_task()

labscript_devices/NI_DAQmx/labscript_devices.py

@@ -80,7 +80,7 @@ class NI_DAQmx(IntermediateDevice):
                 "wait_monitor_minimum_pulse_width",
                 "wait_monitor_supports_wait_completed_events",
             ],
-            "device_properties": ["acquisition_rate"],
+            "device_properties": ["acquisition_rate","start_delay_ticks"],
         }
     )
     def __init__(
@@ -207,7 +207,9 @@ def __init__(
             msg = """AI termination {0} not supported by this device."""
             raise LabscriptError(dedent(msg.format(AI_term))) 
         if AI_term == 'Diff':
-            self.AI_range = AI_range_Diff  
+            self.AI_range = AI_range_Diff
+        # define AI_start_delay in ticks, assumes AI_start_delay_ticks is defined
+        self.start_delay_ticks = (AI_start_delay != None)  
         self.num_AO = num_AO
         self.num_CI = num_CI
         self.ports = ports if ports is not None else {}