reverse-engineering - 找出 RS232 数据的 CRC 或 CHECKSUM-6ren

reverse-engineering - 找出 RS232 数据的 CRC 或 CHECKSUM

转载作者：行者123 更新时间：2023-12-04 17:58:57

我需要与 RS232 设备通信，我没有可用的规范或信息。

我发送一个 16 字节的命令并返回一个 16 字节的结果。最后一个字节看起来像是某种 crc 或校验和，我试过使用这个 http://miscel.dk/MiscEl/miscelCRCandChecksum.html没有运气。

任何人都可以对 crc/校验和算法进行逆向工程吗？这是使用 RS-232 监控程序捕获的一些数据:

01 80 42 00 00 00 00 00 00 00 00 00 00 00 01 B3
01 80 42 00 00 00 00 00 00 00 00 00 00 00 02 51
01 80 42 00 00 00 00 00 00 00 00 00 00 00 03 0F
01 80 42 00 00 00 00 00 00 00 00 00 00 00 04 8C
01 80 42 00 00 00 00 00 00 00 00 00 00 00 05 D2
01 80 42 00 00 00 00 00 00 00 00 00 00 00 06 30
01 80 42 00 00 00 00 00 00 00 00 00 00 00 07 6E
01 80 42 00 00 00 00 00 00 00 00 00 00 00 08 2F
01 80 42 00 00 00 00 00 00 00 00 00 00 00 09 71
01 80 42 00 00 00 00 00 00 00 00 00 00 00 0A 93
01 80 42 00 00 00 00 00 00 00 00 00 00 00 0B CD
01 80 42 00 00 00 00 00 00 00 00 00 00 00 0C 4E
01 80 42 00 00 00 00 00 00 00 00 00 00 00 0D 10
01 80 42 00 00 00 00 00 00 00 00 00 00 00 0E F2
01 80 42 00 00 00 00 00 00 00 00 00 00 00 0F AC
01 80 42 00 00 00 00 00 00 00 00 00 00 00 10 70
01 80 42 00 00 00 00 00 00 00 00 00 00 00 11 2E
01 80 42 00 00 00 00 00 00 00 00 00 00 00 12 CC
01 80 42 00 00 00 00 00 00 00 00 00 00 00 13 92
01 80 42 00 00 00 00 00 00 00 00 00 00 00 14 11
01 80 42 00 00 00 00 00 00 00 00 00 00 00 15 4F
01 80 42 00 00 00 00 00 00 00 00 00 00 00 16 AD
01 80 42 00 00 00 00 00 00 00 00 00 00 00 17 F3
01 80 42 00 00 00 00 00 00 00 00 00 00 00 18 B2
01 80 42 00 00 00 00 00 00 00 00 00 00 00 19 EC
01 80 42 00 00 00 00 00 00 00 00 00 00 00 1A 0E
01 80 42 00 00 00 00 00 00 00 00 00 00 00 1B 50
01 80 42 00 00 00 00 00 00 00 00 00 00 00 1C D3
01 80 42 00 00 00 00 00 00 00 00 00 00 00 1D 8D
01 80 42 00 00 00 00 00 00 00 00 00 00 00 1E 6F
01 80 42 00 00 00 00 00 00 00 00 00 00 00 1F 31
01 80 42 00 00 00 00 00 00 00 00 00 00 00 20 CE
01 80 42 00 00 00 00 00 00 00 00 00 00 00 21 90
01 80 42 00 00 00 00 00 00 00 00 00 00 00 22 72
01 80 42 00 00 00 00 00 00 00 00 00 00 00 23 2C
01 80 42 00 00 00 00 00 00 00 00 00 00 00 24 AF
01 80 42 00 00 00 00 00 00 00 00 00 00 00 25 F1
01 80 42 00 00 00 00 00 00 00 00 00 00 00 26 13
01 80 42 00 00 00 00 00 00 00 00 00 00 00 27 4D
01 80 42 00 00 00 00 00 00 00 00 00 00 00 28 0C
01 80 42 00 00 00 00 00 00 00 00 00 00 00 29 52
01 80 42 00 00 00 00 00 00 00 00 00 00 00 2A B0
01 80 42 00 00 00 00 00 00 00 00 00 00 00 2B EE
01 80 42 00 00 00 00 00 00 00 00 00 00 00 2C 6D
01 80 42 00 00 00 00 00 00 00 00 00 00 00 2D 33
01 80 42 00 00 00 00 00 00 00 00 00 00 00 2E D1
01 80 42 00 00 00 00 00 00 00 00 00 00 00 2F 8F
01 80 42 00 00 00 00 00 00 00 00 00 00 00 30 53
01 80 42 00 00 00 00 00 00 00 00 00 00 00 31 0D
01 80 42 00 00 00 00 00 00 00 00 00 00 00 32 EF
01 80 42 00 00 00 00 00 00 00 00 00 00 00 33 B1
01 80 42 00 00 00 00 00 00 00 00 00 00 00 34 32
01 80 42 00 00 00 00 00 00 00 00 00 00 00 35 6C
01 80 42 00 00 00 00 00 00 00 00 00 00 00 36 8E
01 80 42 00 00 00 00 00 00 00 00 00 00 00 37 D0
01 80 42 00 00 00 00 00 00 00 00 00 00 00 38 91
01 80 42 00 00 00 00 00 00 00 00 00 00 00 39 CF
01 80 42 00 00 00 00 00 00 00 00 00 00 00 3A 2D
01 80 42 00 00 00 00 00 00 00 00 00 00 00 3B 73
01 80 42 00 00 00 00 00 00 00 00 00 00 00 3C F0
01 80 42 00 00 00 00 00 00 00 00 00 00 00 3D AE
01 80 42 00 00 00 00 00 00 00 00 00 00 00 3E 4C
01 80 42 00 00 00 00 00 00 00 00 00 00 00 3F 12
01 80 42 00 00 00 00 00 00 00 00 00 00 00 40 AB
01 80 42 00 00 00 00 00 00 00 00 00 00 00 41 F5
01 80 42 00 00 00 00 00 00 00 00 00 00 00 42 17
01 80 42 00 00 00 00 00 00 00 00 00 00 00 43 49
01 80 42 00 00 00 00 00 00 00 00 00 00 00 44 CA
01 80 42 00 00 00 00 00 00 00 00 00 00 00 45 94
01 80 42 00 00 00 00 00 00 00 00 00 00 00 46 76
01 80 42 00 00 00 00 00 00 00 00 00 00 00 47 28
01 80 42 00 00 00 00 00 00 00 00 00 00 00 48 69
01 80 42 00 00 00 00 00 00 00 00 00 00 00 49 37
01 80 42 00 00 00 00 00 00 00 00 00 00 00 4A D5
01 80 42 00 00 00 00 00 00 00 00 00 00 00 4B 8B
01 80 42 00 00 00 00 00 00 00 00 00 00 00 4C 08
01 80 42 00 00 00 00 00 00 00 00 00 00 00 4D 56
01 80 42 00 00 00 00 00 00 00 00 00 00 00 4E B4
01 80 42 00 00 00 00 00 00 00 00 00 00 00 4F EA
01 80 42 00 00 00 00 00 00 00 00 00 00 00 50 36
01 80 42 00 00 00 00 00 00 00 00 00 00 00 51 68
01 80 42 00 00 00 00 00 00 00 00 00 00 00 52 8A
01 80 42 00 00 00 00 00 00 00 00 00 00 00 53 D4
01 80 42 00 00 00 00 00 00 00 00 00 00 00 54 57
01 80 42 00 00 00 00 00 00 00 00 00 00 00 55 09
01 80 42 00 00 00 00 00 00 00 00 00 00 00 56 EB
01 80 42 00 00 00 00 00 00 00 00 00 00 00 57 B5
01 80 42 00 00 00 00 00 00 00 00 00 00 00 58 F4
01 80 42 00 00 00 00 00 00 00 00 00 00 00 59 AA
01 80 42 00 00 00 00 00 00 00 00 00 00 00 5A 48
01 80 42 00 00 00 00 00 00 00 00 00 00 00 5B 16
01 80 42 00 00 00 00 00 00 00 00 00 00 00 5C 95
01 80 42 00 00 00 00 00 00 00 00 00 00 00 5D CB
01 80 42 00 00 00 00 00 00 00 00 00 00 00 5E 29
01 80 42 00 00 00 00 00 00 00 00 00 00 00 5F 77
01 80 42 00 00 00 00 00 00 00 00 00 00 00 60 88
01 80 42 00 00 00 00 00 00 00 00 00 00 00 61 D6
01 80 42 00 00 00 00 00 00 00 00 00 00 00 62 34
01 80 42 00 00 00 00 00 00 00 00 00 00 00 63 6A
01 80 42 00 00 00 00 00 00 00 00 00 00 00 64 E9
01 80 42 00 00 00 00 00 00 00 00 00 00 00 65 B7
01 80 42 00 00 00 00 00 00 00 00 00 00 00 66 55
01 80 42 00 00 00 00 00 00 00 00 00 00 00 67 0B
01 80 42 00 00 00 00 00 00 00 00 00 00 00 68 4A
01 80 42 00 00 00 00 00 00 00 00 00 00 00 69 14
01 80 42 00 00 00 00 00 00 00 00 00 00 00 6A F6
01 80 42 00 00 00 00 00 00 00 00 00 00 00 6B A8
01 80 42 00 00 00 00 00 00 00 00 00 00 00 6C 2B
01 80 42 00 00 00 00 00 00 00 00 00 00 00 6D 75
01 80 42 00 00 00 00 00 00 00 00 00 00 00 6E 97
01 80 42 00 00 00 00 00 00 00 00 00 00 00 6F C9
01 80 42 00 00 00 00 00 00 00 00 00 00 00 70 15
01 80 42 00 00 00 00 00 00 00 00 00 00 00 71 4B
01 80 42 00 00 00 00 00 00 00 00 00 00 00 72 A9
01 80 42 00 00 00 00 00 00 00 00 00 00 00 73 F7
01 80 42 00 00 00 00 00 00 00 00 00 00 00 74 74
01 80 42 00 00 00 00 00 00 00 00 00 00 00 75 2A
01 80 42 00 00 00 00 00 00 00 00 00 00 00 76 C8
01 80 42 00 00 00 00 00 00 00 00 00 00 00 77 96
01 80 42 00 00 00 00 00 00 00 00 00 00 00 78 D7
01 80 42 00 00 00 00 00 00 00 00 00 00 00 79 89
01 80 42 00 00 00 00 00 00 00 00 00 00 00 7A 6B
01 80 42 00 00 00 00 00 00 00 00 00 00 00 7B 35
01 80 42 00 00 00 00 00 00 00 00 00 00 00 7C B6
01 80 42 00 00 00 00 00 00 00 00 00 00 00 7D E8
01 80 42 00 00 00 00 00 00 00 00 00 00 00 7E 0A
01 80 42 00 00 00 00 00 00 00 00 00 00 00 7F 54
01 80 42 00 00 00 00 00 00 00 00 00 00 00 80 61
01 80 42 00 00 00 00 00 00 00 00 00 00 00 81 3F
01 80 42 00 00 00 00 00 00 00 00 00 00 00 82 DD
01 80 42 00 00 00 00 00 00 00 00 00 00 00 83 83
01 80 42 00 00 00 00 00 00 00 00 00 00 00 84 00
01 80 42 00 00 00 00 00 00 00 00 00 00 00 85 5E
01 80 42 00 00 00 00 00 00 00 00 00 00 00 86 BC
01 80 42 00 00 00 00 00 00 00 00 00 00 00 87 E2
01 80 42 00 00 00 00 00 00 00 00 00 00 00 88 A3
01 80 42 00 00 00 00 00 00 00 00 00 00 00 89 FD
01 80 42 00 00 00 00 00 00 00 00 00 00 00 8A 1F
01 80 42 00 00 00 00 00 00 00 00 00 00 00 8B 41
01 80 42 00 00 00 00 00 00 00 00 00 00 00 8C C2
01 80 42 00 00 00 00 00 00 00 00 00 00 00 8D 9C
01 80 42 00 00 00 00 00 00 00 00 00 00 00 8E 7E
01 80 42 00 00 00 00 00 00 00 00 00 00 00 8F 20
01 80 42 00 00 00 00 00 00 00 00 00 00 00 90 FC
01 80 42 00 00 00 00 00 00 00 00 00 00 00 91 A2
01 80 42 00 00 00 00 00 00 00 00 00 00 00 92 40
01 80 42 00 00 00 00 00 00 00 00 00 00 00 93 1E
01 80 42 00 00 00 00 00 00 00 00 00 00 00 94 9D
01 80 42 00 00 00 00 00 00 00 00 00 00 00 95 C3
01 80 42 00 00 00 00 00 00 00 00 00 00 00 96 21
01 80 42 00 00 00 00 00 00 00 00 00 00 00 97 7F
01 80 42 00 00 00 00 00 00 00 00 00 00 00 98 3E
01 80 42 00 00 00 00 00 00 00 00 00 00 00 99 60
01 80 42 00 00 00 00 00 00 00 00 00 00 00 9A 82
01 80 42 00 00 00 00 00 00 00 00 00 00 00 9B DC
01 80 42 00 00 00 00 00 00 00 00 00 00 00 9C 5F
01 80 42 00 00 00 00 00 00 00 00 00 00 00 9D 01
01 80 42 00 00 00 00 00 00 00 00 00 00 00 9E E3
01 80 42 00 00 00 00 00 00 00 00 00 00 00 9F BD
01 80 42 00 00 00 00 00 00 00 00 00 00 00 A0 42
01 80 42 00 00 00 00 00 00 00 00 00 00 00 A1 1C
01 80 42 00 00 00 00 00 00 00 00 00 00 00 A2 FE
01 80 42 00 00 00 00 00 00 00 00 00 00 00 A3 A0
01 80 42 00 00 00 00 00 00 00 00 00 00 00 A4 23
01 80 42 00 00 00 00 00 00 00 00 00 00 00 A5 7D
01 80 42 00 00 00 00 00 00 00 00 00 00 00 A6 9F
01 80 42 00 00 00 00 00 00 00 00 00 00 00 A7 C1
01 80 42 00 00 00 00 00 00 00 00 00 00 00 A8 80
01 80 42 00 00 00 00 00 00 00 00 00 00 00 A9 DE
01 80 42 00 00 00 00 00 00 00 00 00 00 00 AA 3C
01 80 42 00 00 00 00 00 00 00 00 00 00 00 AB 62
01 80 42 00 00 00 00 00 00 00 00 00 00 00 AC E1
01 80 42 00 00 00 00 00 00 00 00 00 00 00 AD BF
01 80 42 00 00 00 00 00 00 00 00 00 00 00 AE 5D
01 80 42 00 00 00 00 00 00 00 00 00 00 00 AF 03
01 80 42 00 00 00 00 00 00 00 00 00 00 00 B0 DF
01 80 42 00 00 00 00 00 00 00 00 00 00 00 B1 81
01 80 42 00 00 00 00 00 00 00 00 00 00 00 B2 63
01 80 42 00 00 00 00 00 00 00 00 00 00 00 B3 3D
01 80 42 00 00 00 00 00 00 00 00 00 00 00 B4 BE
01 80 42 00 00 00 00 00 00 00 00 00 00 00 B5 E0
01 80 42 00 00 00 00 00 00 00 00 00 00 00 B6 02
01 80 42 00 00 00 00 00 00 00 00 00 00 00 B7 5C
01 80 42 00 00 00 00 00 00 00 00 00 00 00 B8 1D
01 80 42 00 00 00 00 00 00 00 00 00 00 00 B9 43
01 80 42 00 00 00 00 00 00 00 00 00 00 00 BA A1
01 80 42 00 00 00 00 00 00 00 00 00 00 00 BB FF
01 80 42 00 00 00 00 00 00 00 00 00 00 00 BC 7C
01 80 42 00 00 00 00 00 00 00 00 00 00 00 BD 22
01 80 42 00 00 00 00 00 00 00 00 00 00 00 BE C0
01 80 42 00 00 00 00 00 00 00 00 00 00 00 BF 9E
01 80 42 00 00 00 00 00 00 00 00 00 00 00 C0 27
01 80 42 00 00 00 00 00 00 00 00 00 00 00 C1 79
01 80 42 00 00 00 00 00 00 00 00 00 00 00 C2 9B
01 80 42 00 00 00 00 00 00 00 00 00 00 00 C3 C5
01 80 42 00 00 00 00 00 00 00 00 00 00 00 C4 46
01 80 42 00 00 00 00 00 00 00 00 00 00 00 C5 18
01 80 42 00 00 00 00 00 00 00 00 00 00 00 C6 FA
01 80 42 00 00 00 00 00 00 00 00 00 00 00 C7 A4
01 80 42 00 00 00 00 00 00 00 00 00 00 00 C8 E5
01 80 42 00 00 00 00 00 00 00 00 00 00 00 C9 BB
01 80 42 00 00 00 00 00 00 00 00 00 00 00 CA 59
01 80 42 00 00 00 00 00 00 00 00 00 00 00 CB 07
01 80 42 00 00 00 00 00 00 00 00 00 00 00 CC 84
01 80 42 00 00 00 00 00 00 00 00 00 00 00 CD DA
01 80 42 00 00 00 00 00 00 00 00 00 00 00 CE 38
01 80 42 00 00 00 00 00 00 00 00 00 00 00 CF 66
01 80 42 00 00 00 00 00 00 00 00 00 00 00 D0 BA
01 80 42 00 00 00 00 00 00 00 00 00 00 00 D1 E4
01 80 42 00 00 00 00 00 00 00 00 00 00 00 D2 06
01 80 42 00 00 00 00 00 00 00 00 00 00 00 D3 58
01 80 42 00 00 00 00 00 00 00 00 00 00 00 D4 DB
01 80 42 00 00 00 00 00 00 00 00 00 00 00 D5 85
01 80 42 00 00 00 00 00 00 00 00 00 00 00 D6 67
01 80 42 00 00 00 00 00 00 00 00 00 00 00 D7 39
01 80 42 00 00 00 00 00 00 00 00 00 00 00 D8 78
01 80 42 00 00 00 00 00 00 00 00 00 00 00 D9 26
01 80 42 00 00 00 00 00 00 00 00 00 00 00 DA C4
01 80 42 00 00 00 00 00 00 00 00 00 00 00 DB 9A
01 80 42 00 00 00 00 00 00 00 00 00 00 00 DC 19
01 80 42 00 00 00 00 00 00 00 00 00 00 00 DD 47
01 80 42 00 00 00 00 00 00 00 00 00 00 00 DE A5
01 80 42 00 00 00 00 00 00 00 00 00 00 00 DF FB
01 80 42 00 00 00 00 00 00 00 00 00 00 00 E0 04
01 80 42 00 00 00 00 00 00 00 00 00 00 00 E1 5A
01 80 42 00 00 00 00 00 00 00 00 00 00 00 E2 B8
01 80 42 00 00 00 00 00 00 00 00 00 00 00 E3 E6
01 80 42 00 00 00 00 00 00 00 00 00 00 00 E4 65
01 80 42 00 00 00 00 00 00 00 00 00 00 00 E5 3B
01 80 42 00 00 00 00 00 00 00 00 00 00 00 E6 D9
01 80 42 00 00 00 00 00 00 00 00 00 00 00 E7 87
01 80 42 00 00 00 00 00 00 00 00 00 00 00 E8 C6
01 80 42 00 00 00 00 00 00 00 00 00 00 00 E9 98
01 80 42 00 00 00 00 00 00 00 00 00 00 00 EA 7A
01 80 42 00 00 00 00 00 00 00 00 00 00 00 EB 24
01 80 42 00 00 00 00 00 00 00 00 00 00 00 EC A7
01 80 42 00 00 00 00 00 00 00 00 00 00 00 ED F9
01 80 42 00 00 00 00 00 00 00 00 00 00 00 EE 1B
01 80 42 00 00 00 00 00 00 00 00 00 00 00 EF 45
01 80 42 00 00 00 00 00 00 00 00 00 00 00 F0 99
01 80 42 00 00 00 00 00 00 00 00 00 00 00 F1 C7
01 80 42 00 00 00 00 00 00 00 00 00 00 00 F2 25
01 80 42 00 00 00 00 00 00 00 00 00 00 00 F3 7B
01 80 42 00 00 00 00 00 00 00 00 00 00 00 F4 F8
01 80 42 00 00 00 00 00 00 00 00 00 00 00 F5 A6
01 80 42 00 00 00 00 00 00 00 00 00 00 00 F6 44
01 80 42 00 00 00 00 00 00 00 00 00 00 00 F7 1A
01 80 42 00 00 00 00 00 00 00 00 00 00 00 F8 5B
01 80 42 00 00 00 00 00 00 00 00 00 00 00 F9 05
01 80 42 00 00 00 00 00 00 00 00 00 00 00 FA E7
01 80 42 00 00 00 00 00 00 00 00 00 00 00 FB B9
01 80 42 00 00 00 00 00 00 00 00 00 00 00 FC 3A
01 80 42 00 00 00 00 00 00 00 00 00 00 00 FD 64
01 80 42 00 00 00 00 00 00 00 00 00 00 00 FE 86
01 80 42 00 00 00 00 00 00 00 00 00 00 00 FF D8

倒数第二个字节似乎是一个序列号，当它到达 FF 时从 00 开始。我已经包含了从 00 到 FF 的整个范围，以便更容易猜测 crc/checksum 方法。

无法添加评论，所以我将在这里添加信息:

当前面的 15 个字节都相等时，最后一个字节是相同的。
这是设备: http://www.intelektron.com/productos/tya_rei4000.htm

更正
(而且我认为我在软件中发现了一个错误)设备本身在倒数第二个字节到达 FF 后从 00 重新开始，但是向设备发送命令的软件在到达 FF 时从 01 重新开始。无论如何，我认为倒数第二个序列字节与 crc/校验和问题无关。

澄清
列出的数据是软件发送的命令，设备的回复没有列出。设备响应上述每个命令，发送一行存储的数据，例如:

80 01 C2 80 85 01 25 65 57 37 19 32 01 04 76 17

这一行包含一个 4 字节的卡号、时间和日期等，我认为与 crc/校验和问题无关。

附加信息:

我一直在探索该软件的 VB6 ocxs 并得到了这个:

Object: clsCRC8
Object: basComunicaciones2
Private sub Proc_1_0_30305330
  loc_30305352: var_8 = 30301198h
  loc_30305373: call basComunicaciones2.SetPropA(edi, arg_8, ebx)
  loc_30305376: var_4 = 0
End Sub

Private sub Proc_1_1_303053A0
  loc_303053C2: var_8 = 303011A0h
  loc_303053E2: call MSVBVM60.DLL.__vbaBoolVarNull(basComunicaciones2.Caption = %x1, arg_8, ebx)
  loc_303053EB: If MSVBVM60.DLL.__vbaBoolVarNull(basComunicaciones2.Caption <> %x1 <>  arg_8 Then GoTo loc_303054B8
  loc_303053F7: var_24 = FFFFFFFFh
  loc_303053FE: var_2C = 11
  loc_30305405: ecx = True
  loc_3030540D: call MSVBVM60.DLL.__vbaUI1I2
  loc_3030541C: edx = edx - 0001h
  loc_30305429: If edx-0001h < 0 Then GoTo loc_30305499
  loc_3030542B: 
  loc_30305443: di = di - basComunicaciones2.%x1 = GetIDsOfNames(%x2) 'Ignore this
  loc_30305447: If di < Me.GetTypeInfo Then GoTo loc_3030544F
  loc_30305449: Err.Raise
  loc_3030544F: 
  loc_30305451: GoTo loc_30305459
  loc_30305453: Err.Raise
  loc_30305459: 
  loc_3030546B: eax = "" And 000000FFh
  loc_30305478: If ecx+eax xor eax < 257 Then GoTo loc_30305480
  loc_3030547A: Err.Raise
  loc_30305480: 
  loc_30305492: var_18 = Var_Ret_1
  loc_30305495: If edi <= Me = %x1 Then GoTo loc_3030542B
  loc_30305499: 
  loc_3030549F: not al
  loc_303054A1: var_18 = Var_Ret_1
  loc_303054A4: var_24 = 0
  loc_303054AB: var_2C = 11
  loc_303054B2: ecx =
  loc_303054B8: 
  loc_303054DC: Exit Sub
End Sub

Private sub Proc_1_2_30306410
  loc_30306432: var_8 = 303011A8h
  loc_3030644F: var_38 = &H4011
  loc_30306489: If Len(Hex()) >= 2 Then GoTo loc_303064A1
  loc_3030649F: var_18 = 808463756 & var_18
  loc_303064A1: 
  loc_303064A6: GoTo loc_303064C1
  loc_303064C0: Exit Sub
  loc_303064C1: 
End Sub

我很确定这会计算数据的 CRC8:

方法Calcular(Paquete As , CantidadDeBytes As Integer) As Unsigned Small Integer
vbpComunicaciones2 的成员(缓存).clsCRC8
在接口(interface) _clsCRC8 中定义

任何人都可以对此有所了解吗？可悲的是，我不能。

最佳答案

答案在这里:http://blog.sina.com.cn/s/blog_5a1d5bca0100bjvx.html

0xff - 来自上述链接的算法结果，一切都匹配。花了我 2 个下午和我得到的帮助，但最终还是成功了。

当然，由于 Gerhard 发布的链接，我或多或少地理解了该代码的作用。谢谢你。

关于reverse-engineering - 找出 RS232 数据的 CRC 或 CHECKSUM，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/2650749/

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reverse-engineering - 找出 RS232 数据的 CRC 或 CHECKSUM