Add support for writing neuromag122 data to BIDS

.github/workflows/unit_tests.yml

@@ -144,7 +144,7 @@ jobs:
       uses: actions/cache@v3
       with:
         path: ${{ env.pythonLocation }}
-        key: test-0-${{ env.pythonLocation }}-${{ env.os }}-${{ hashFiles('setup.cfg') }}-${{ hashFiles('test_requirements.txt') }}
+        key: test-1-${{ env.pythonLocation }}-${{ env.os }}-${{ hashFiles('setup.cfg') }}-${{ hashFiles('test_requirements.txt') }}
 
     - name: Install Python dependencies using pip
       run: |

doc/whats_new.rst

@@ -63,6 +63,7 @@ Detailed list of changes
 - When writing data containing :class:`mne.Annotations` **and** passing events to :func:`~mne_bids.write_raw_bids`, previously, annotations whose description did not appear in ``event_id`` were silently dropped. We now raise an exception and request users to specify mappings between descriptions and event codes in this case. It is still possible to omit ``event_id`` if no ``events`` are passed, by `Richard Höchenberger`_ (:gh:`1084`)
 - When working with NIRS data, raise the correct error message when a faulty ``format`` argument is passed to :func:`~mne_bids.write_raw_bids`, by `Stefan Appelhoff`_ (:gh:`1092`)
 - Fixed writing data preloaded from a format that's not supported by BIDS, by `Richard Höchenberger`_ (:gh:`1101`)
+- Fixed writing data from neuromag system having 122 sensors, by `Alexandre Gramfort`_ (:gh:`1109`)
 
 :doc:`Find out what was new in previous releases <whats_new_previous_releases>`
 

mne_bids/pick.py

@@ -34,6 +34,7 @@ def get_coil_types():
                         FIFF.FIFFV_COIL_VV_MAG_T1,
                         FIFF.FIFFV_COIL_VV_MAG_T2,
                         FIFF.FIFFV_COIL_VV_MAG_T3,
+                        FIFF.FIFFV_COIL_NM_122,
                         FIFF.FIFFV_COIL_MAGNES_MAG,
                         FIFF.FIFFV_COIL_BABY_MAG),
                 megrefmag=(FIFF.FIFFV_COIL_KIT_REF_MAG,

mne_bids/tests/test_write.py

@@ -3897,3 +3897,22 @@ def test_unknown_extension(_bids_validate, tmp_path):
 
     write_raw_bids(raw, bids_path, allow_preload=True, format='FIF')
     _bids_validate(bids_root)
+
+
+@testing.requires_testing_data
+def test_write_neuromag122(_bids_validate, tmp_path):
+    """Test writing Neuromag122 data to BIDS."""
+    bids_root = tmp_path / 'bids'
+    raw_fname = data_path / 'MEG' / 'sample' / 'sample_audvis_trunc_raw.fif'
+    raw = mne.io.read_raw_fif(raw_fname, allow_maxshield=True)
+    raw.info["line_freq"] = 50  # power line frequency as required by BIDS
+    raw.pick('mag')
+    for c in raw.info['chs']:
+        c['coil_type'] = FIFF.FIFFV_COIL_NM_122
+
+    bids_path = BIDSPath(subject="01", task="wordreport", run="01",
+                         root=bids_root,
+                         extension=".fif", datatype="meg")
+    write_raw_bids(raw, bids_path, overwrite=True, allow_preload=True,
+                   format="FIF")
+    _bids_validate(bids_root)