Add test, limit to first 8 bits

src/ctapipe_io_lst/evb_preprocessing.py

@@ -52,7 +52,8 @@ def get_processings_for_trigger_bits(camera_configuration):
     tdp_action = camera_configuration.debug.ttype_pattern
 
     # first bit (no shift) is default handling
-    default = EVBPreprocessingFlag(int(tdp_action[0]))
+    # only look at the first byte for now (maximum 6 bits defied above)
+    default = EVBPreprocessingFlag(int(tdp_action[0]) & 0xff)
     actions = defaultdict(lambda: default)
 
     # the following bits refer to the entries in tdp_type
@@ -61,6 +62,7 @@ def get_processings_for_trigger_bits(camera_configuration):
         if trigger_bits == 0:
             continue
 
-        actions[TriggerBits(int(trigger_bits))] = EVBPreprocessingFlag(int(tdp_action[i]))
+        # only look at the first byte for now (maximum 6 bits defied above)
+        actions[TriggerBits(int(trigger_bits))] = EVBPreprocessingFlag(int(tdp_action[i]) & 0xff)
 
     return actions

src/ctapipe_io_lst/tests/test_evb_preprocessing.py

@@ -0,0 +1,56 @@
+import os
+from pathlib import Path
+from protozfits import File
+from ctapipe_io_lst import TriggerBits
+from ctapipe_io_lst.evb_preprocessing import EVBPreprocessingFlag
+
+import pytest
+
+
+test_data = Path(os.getenv('LSTCHAIN_TEST_DATA', 'test_data')).absolute()
+
+test_files = [
+    "20231214/LST-1.1.Run16102.0000_first50.fits.fz",  # has only baseline enabled
+    "20231218/LST-1.1.Run16231.0000_first50.fits.fz",  # baseline + gain selection for physics
+    "20231219/LST-1.1.Run16255.0000_first50.fits.fz",  # all corrections + gain selection for physics
+]
+
+all_corrections = EVBPreprocessingFlag.BASELINE_SUBTRACTION | EVBPreprocessingFlag.DELTA_T_CORRECTION | EVBPreprocessingFlag.PE_CALIBRATION | EVBPreprocessingFlag.PEDESTAL_SUBTRACTION
+
+expected = [
+    {
+        TriggerBits.MONO: EVBPreprocessingFlag.BASELINE_SUBTRACTION,
+        TriggerBits.STEREO: EVBPreprocessingFlag.BASELINE_SUBTRACTION,
+        TriggerBits.MONO|TriggerBits.PEDESTAL: EVBPreprocessingFlag.BASELINE_SUBTRACTION,
+        TriggerBits.MONO|TriggerBits.CALIBRATION: EVBPreprocessingFlag.BASELINE_SUBTRACTION,
+        TriggerBits.PEDESTAL: EVBPreprocessingFlag.BASELINE_SUBTRACTION,
+        TriggerBits.CALIBRATION: EVBPreprocessingFlag.BASELINE_SUBTRACTION,
+    },
+    {
+        TriggerBits.MONO: EVBPreprocessingFlag.BASELINE_SUBTRACTION | EVBPreprocessingFlag.GAIN_SELECTION,
+        TriggerBits.STEREO: EVBPreprocessingFlag.BASELINE_SUBTRACTION | EVBPreprocessingFlag.GAIN_SELECTION,
+        TriggerBits.MONO|TriggerBits.PEDESTAL: EVBPreprocessingFlag.BASELINE_SUBTRACTION | EVBPreprocessingFlag.GAIN_SELECTION,
+        TriggerBits.MONO|TriggerBits.CALIBRATION: EVBPreprocessingFlag.BASELINE_SUBTRACTION,
+        TriggerBits.PEDESTAL: EVBPreprocessingFlag.BASELINE_SUBTRACTION,
+        TriggerBits.CALIBRATION: EVBPreprocessingFlag.BASELINE_SUBTRACTION,
+    },
+    {
+        TriggerBits.MONO: all_corrections | EVBPreprocessingFlag.GAIN_SELECTION,
+        TriggerBits.STEREO: all_corrections| EVBPreprocessingFlag.GAIN_SELECTION,
+        TriggerBits.MONO|TriggerBits.PEDESTAL: all_corrections | EVBPreprocessingFlag.GAIN_SELECTION,
+        TriggerBits.MONO|TriggerBits.CALIBRATION: all_corrections,
+        TriggerBits.PEDESTAL: all_corrections,
+        TriggerBits.CALIBRATION: all_corrections,
+    },
+]
+@pytest.mark.parametrize(("test_file", "expected"), zip(test_files, expected))
+def test_get_processings_for_trigger_bits(test_file, expected):
+    from ctapipe_io_lst.evb_preprocessing import get_processings_for_trigger_bits
+
+    path = test_data / "real/R0/" / test_file
+
+    with File(str(path)) as f:
+        camera_config = f.CameraConfiguration[0]
+
+    result = get_processings_for_trigger_bits(camera_config)
+    assert result == expected