Minor update to README and process_tp_data

Author: Martin

examples/data-processing/README.md

@@ -42,7 +42,9 @@ The basic concept works as follows:
 To use the Transport Protocol functionality in other scripts, you need to make minor modifications:
 
 1. Ensure that you import the `MultiFrameDecoder` class from `utils.py` 
-2. Specify the type via the `tp_type` variable and ensure you include this in the `extract_phys` function 
+2. Specify the type via the `tp_type` variable e.g. to `j1939` 
+3. After you've extract the normal raw dataframe, parse it to the `tp.combine_tp_frames` function as below
+4. Ensure you include `tp_type` in the `extract_phys` function
 
 See below example:
 

examples/data-processing/process_tp_data.py

@@ -43,9 +43,9 @@ def process_tp_example(devices, dbc_path, tp_type):
 process_tp_example(devices, dbc_paths, "j1939")
 
 # NMEA 2000 fast packet data (with GNSS position)
-devices = ["LOG_TP/94C49784"]
-dbc_paths = [r"dbc_files/tp_nmea_2.dbc"]
-process_tp_example(devices, dbc_paths, "nmea")
+# devices = ["LOG_TP/94C49784"]
+# dbc_paths = [r"dbc_files/tp_nmea_2.dbc"]
+# process_tp_example(devices, dbc_paths, "nmea")
 
 # UDS data across two CAN channels
 devices = ["LOG_TP/FE34E37D"]