一、工具包安裝
pip install cantools python-can二、解析blf文件
一般情況下，解析blf需要dbc文件，當(dāng)然其實(shí)不用dbc也可以，只不過解析比較麻煩，推薦還是配合dbc解析，這個(gè)也是我們最常用的辦法。所以要用dbc，需要先加載dbc文件，這里需要cantools，代碼：
import cantools
import can
dbc_file = r"C:\Users\master01\Downloads\blf_conf\FS04通用_TBOX(1).dbc"
dbc = cantools.db.load_file(dbc_file)加載完dbc文件，就可以解析blf文件了，代碼
f = r"C:\Users\master01\Downloads\blfdata\問題blf\1.17-9-10.blf"
log_data = can.BLFReader(f)
for msg in log_data:
print(msg)打印結(jié)果是這樣的
Timestamp: 1673917200.026000 ID: 0301 S Rx DL: 8 1d b0 41 54 07 02 00 00 Channel: 0
Timestamp: 1673917200.026000 ID: 070b S Rx DL: 8 00 c8 0c b6 24 b8 24 b8 Channel: 0
Timestamp: 1673917200.028000 ID: 0322 S Rx DL: 8 00 00 00 00 00 00 03 00 Channel: 0
Timestamp: 1673917200.126000 ID: 030d S Rx DL: 8 00 14 00 00 00 00 00 00 Channel: 0
Timestamp: 1673917200.126000 ID: 0320 S Rx DL: 8 06 b1 00 00 00 00 07 00 Channel: 0
Timestamp: 1673917200.127000 ID: 0708 S Rx DL: 8 00 48 00 48 00 08 00 32 Channel: 0
Timestamp: 1673917200.129000 ID: 0712 S Rx DL: 8 00 06 81 0d 21 05 00 00 Channel: 0
Timestamp: 1673917200.271000 ID: 1821a7c1 X Rx DL: 8 02 2f 00 00 00 00 00 00 Channel: 0
Timestamp: 1673917200.321000 ID: 0110 S Rx DL: 8 05 36 16 67 00 09 20 6b Channel: 0
Timestamp: 1673917200.322000 ID: 0111 S Rx DL: 8 16 5d 00 00 d4 00 20 bf Channel: 0
Timestamp: 1673917200.322000 ID: 0112 S Rx DL: 8 49 32 00 10 00 16 6d 4c Channel: 0
Timestamp: 1673917200.326000 ID: 0300 S Rx DL: 8 00 3a c2 f8 00 00 00 00 Channel: 0
Timestamp: 1673917200.326000 ID: 0710 S Rx DL: 8 00 00 00 00 00 00 00 00 Channel: 0
Timestamp: 1673917200.427000 ID: 0709 S Rx DL: 8 0e 02 0e b0 4a 0c ff fe Channel: 0
Timestamp: 1673917200.427000 ID: 070a S Rx DL: 8 11 51 1f fd 46 de 1c 83 Channel: 0
Timestamp: 1673917200.428000 ID: 0711 S Rx DL: 8 02 df 00 09 02 d5 00 d4 Channel: 0
Timestamp: 1673917200.438000 ID: 0308 S Rx DL: 8 03 22 0a 3c 0a 00 00 2a Channel: 0
Timestamp: 1673917200.550000 ID: 03a1 S Rx DL: 8 00 00 06 b1 00 00 15 00 Channel: 0
Timestamp: 1673917200.550000 ID: 03a2 S Rx DL: 8 00 00 00 00 00 00 05 00 Channel: 0
Timestamp: 1673917200.633000 ID: 0270 S Rx DL: 8 00 67 67 00 00 00 00 a2 Channel: 0
Timestamp: 1673917200.638000 ID: 0307 S Rx DL: 8 41 14 03 c0 36 00 00 03 Channel: 0
Timestamp: 1673917200.638000 ID: 0309 S Rx DL: 8 1c 1c 1c 1c 1c 1c c3 50 Channel: 0
Timestamp: 1673917200.655000 ID: 03a0 S Rx DL: 8 06 b1 00 00 00 00 15 00 Channel: 0
Timestamp: 1673917200.657000 ID: 030a S Rx DL: 8 00 00 00 00 00 00 00 00 Channel: 0可以發(fā)現(xiàn)，時(shí)間戳解析出來了，其它的數(shù)據(jù)都是16進(jìn)制，沒法直接看，當(dāng)然我們?nèi)绻煜lf格式，可以自己把數(shù)據(jù)還原出來，但是既然已經(jīng)用第三方庫，我們當(dāng)然就不用自己解析了，而且仔細(xì)觀察一下即可發(fā)現(xiàn)，之前的加載dbc并沒有用上，所以這時(shí)一個(gè)重要的函數(shù)登場(chǎng)了，那就是dbc.decode_message(id,data)，具體代碼如下
decoded = {}
for msg in logdata:
try:
dec = dbc.decode_message(msg.arbitration_id, msg.data)
if dec:
for key, data in dec.items():
if key not in decoded:
decoded[key] = []
decoded[key].append([msg.timestamp, data])
except:
pass因?yàn)槲疫@里是最后把數(shù)據(jù)解析出來轉(zhuǎn)成mf4了，所以構(gòu)建了一個(gè)decoded字典，每個(gè)key里記一個(gè)信號(hào)，熟悉mf4的應(yīng)該知道，mf4里每個(gè)信號(hào)主要包含兩部分，一個(gè)是時(shí)間戳，一個(gè)是數(shù)據(jù)，有了這兩個(gè)，我們就可以創(chuàng)建mf4文件了，最后放上創(chuàng)建mf4的代碼文章來源：http://www.zghlxwxcb.cn/news/detail-505939.html
from asammdf import MDF,Signal
sigs = []
for k,v in decoded.items():
timestamps = [i[0] for i in v]
data = [i[1] for i in v]
s = Signal(data,timestamps,name=k)
sigs.append(s)
mdf = MDF()
mdf.append(sigs)
mdf.save("xx.mf4",overwrite=True)這樣就實(shí)現(xiàn)了blf文件的解析與轉(zhuǎn)換，當(dāng)然，轉(zhuǎn)換的格式很自由，只要熟悉相應(yīng)的格式，比如csv，hdf5，xlsx，json，pickle都可以，因?yàn)槲覀円呀?jīng)拿到原始數(shù)據(jù)了，保存成什么格式就很簡單了。文章來源地址http://www.zghlxwxcb.cn/news/detail-505939.html
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