Hello, Can anybody tell me how to generate Look-Up table from the checksum alogorithm?
Regards, Abhijeet R. Mudgal.
There are no lookup tables for checksum, since a checksum is just a sum. You can't really gain anything by trying to look up an add operation.
Maybe you are talking about CRC - Cyclic Redundancy Check?
For CRC, there are many, many tables already built if you just google. Some tables are for crc16 in nibble mode. Some for crc16 in byte mode. Some are for crc16-ccitt. Some are for processing data with reversed bit order. Some are for crc32...
Note that for 8051 processors, you normally don't have a lot of RAM. So you do not want to create the CRC lookup table when the program starts, but instead compile the table directly into CODE.
Hello, I have Proprietary checksum with me which I can't give it to anybody and I want to generate Look-Up table from this code. Can you help me in this regard?
If it's proprietary, and you won't give the details to anyone, how can anyone possibly help you with it?!
And, surely, if it's your "checksum" then you must know how to calculate it?!
A PC-based spreadsheet application such as Excel can easily be used to calculate the table values; or just write yourself a simple 'C' program to do it...
Why would anyone develop their own proprietary checksum? Is it because Adler-32 or CRC or similar works too well?
Hello, I have its C code but which takes more time to calculate hence I want to write a code which takes values from Look-Up table. Can you please help me in this regard.
No, we can not. You have already said that the checksum is proprietary. That means that we just can not help!