| Neil Kurzman 08/06/07 11:22 Read: 712 times Ny USA |
#142823 - The formula Responding to: John Myers's previous message |
This is in VB6, but it translates well. and Make your own tables
Public Function CRC8Byte(ByVal Data As Byte, ByVal CRC As Byte) As Byte Dim j As Integer Dim k As Integer Const POLY = &H107 'X8 + X2 + X1 + 1 'Const POLY = &H12F 'X8 + X5 + X3 + X2 + X1 + 1 '8 7654 3210 '1 0010 1111 j = (Data Xor CRC) And &HFF For k = 1 To 8 If (j And &H80) Then j = (j * 2) Xor POLY Else j = j * 2 End If Next k CRC8Byte = j And &HFF |
| Topic | Author | Date |
| How to create a crc table? | John Myers | 08/04/07 02:33 |
| simple | Jan Waclawek | 08/04/07 08:10 |
| RE: simple | John Myers | 08/04/07 15:34 |
| I said it\'s simple | Jan Waclawek | 08/04/07 17:33 |
| Thank you | John Myers | 08/04/07 18:27 |
| Protocols | Andy Neil | 08/06/07 07:48 |
| examples | Jan Waclawek | 08/06/07 08:05 |
| Runtime Computed Table?? | Michael Karas | 08/04/07 09:14 |
| RE: Runtime...? | John Myers | 08/04/07 16:02 |
| table is not necessary | Jan Waclawek | 08/04/07 17:41 |
| Benchmark | John Myers | 08/04/07 18:16 |
| I did benchmarks as such on AVR | Michael Karas | 08/04/07 19:38 |
| Similar findings | Russell Bull | 08/04/07 21:05 |
| no beavers that I've tended to!! | Michael Karas | 08/04/07 22:50 |
| not bitwise.... | Jan Waclawek | 08/05/07 02:45 |
| Better is a strong word | Neil Kurzman | 08/05/07 21:19 |
| Also comment about SMBus PEC Code... | Michael Karas | 08/05/07 21:30 |
| The Table | Neil Kurzman | 08/06/07 11:19 |
| The Nibble Table for Poly 107 | Neil Kurzman | 08/06/07 11:20 |
| The formula | Neil Kurzman | 08/06/07 11:22 |
| Have you seen this? | Richard Erlacher | 08/06/07 18:42 |
| Now I have | Neil Kurzman | 08/06/07 21:26 |
Yes, that is a Key Document! | Andy Neil | 08/07/07 02:45 |