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| 1 | +# this script can be used to generate log files for the CANedge e.g. for testing WiFi transfer |
| 2 | + |
| 3 | +import os |
| 4 | +import hashlib |
| 5 | + |
| 6 | +# specify details of log files (device ID should match your test device) |
| 7 | +device_id = "534F281B" |
| 8 | +file_type = "MF4" |
| 9 | +sessions = 120 |
| 10 | +splits = 50 |
| 11 | +size_bytes = 2 * 1024 * 1024 |
| 12 | + |
| 13 | +# function for creating files |
| 14 | +def sha256_file(path): |
| 15 | + digest = hashlib.sha256() |
| 16 | + with open(path, "rb") as f: |
| 17 | + while True: |
| 18 | + buf = f.read(65536) |
| 19 | + if len(buf) == 0: |
| 20 | + break |
| 21 | + digest.update(buf) |
| 22 | + return digest.hexdigest().upper() |
| 23 | + |
| 24 | +# run loop to create log files in folders |
| 25 | +dir_path = os.path.dirname(os.path.abspath(__file__)) |
| 26 | + |
| 27 | +for session_no in range(1, sessions + 1): |
| 28 | + for split_no in range(1, splits + 1): |
| 29 | + tmp_file_name = "{}.mf4".format(split_no) |
| 30 | + tmp_file_path = os.path.join(dir_path, tmp_file_name) |
| 31 | + |
| 32 | + with open(tmp_file_path, "w+") as f: |
| 33 | + f.seek(size_bytes - 1) |
| 34 | + f.write("\0") |
| 35 | + |
| 36 | + # Calculate digest of file |
| 37 | + digest = sha256_file(tmp_file_path) |
| 38 | + |
| 39 | + # create folder name |
| 40 | + folder = f'{session_no}'.zfill(8) |
| 41 | + |
| 42 | + # Check whether the specified path exists or not |
| 43 | + isExist = os.path.exists(folder) |
| 44 | + |
| 45 | + if not isExist: |
| 46 | + # Create a new directory because it does not exist |
| 47 | + os.makedirs(folder) |
| 48 | + |
| 49 | + # Create file name |
| 50 | + new_file_name = folder + "\\" + f"{split_no}".zfill(8) + ".MF4" |
| 51 | + # new_file_name = "{}_{:08}_{:08}-{}.mf4".format(device_id, session_no, split_no, digest) |
| 52 | + new_file_path = os.path.join(dir_path, new_file_name) |
| 53 | + |
| 54 | + os.rename(tmp_file_path, new_file_path) |
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