With Codewarrior (hc12 v3.1), I am have specified in the prm file that a checksum be added, with this code in the prm: // Generate the checksum: computed only on page 3e. CHECKSUM CHECKSUM_ENTRY METHOD_CRC16 OF READ_ONLY 0x3E8000 TO 0x3EBFFD INTO READ_ONLY 0x3EBFFE SIZE 2 UNDEFINED 0xff END END
This will compute a CRC16 on most of Page 3e and store it in the last two bytes. This is nice as it keeps me from having to make a post linker cript/program to insert my own checksum.
The hc12 build tools manual covers how to set this up, and it works. However, I have a small issue. Metrowerks provides C utilities for verifying this checksum. So, how do I verify this if I only use assembly? I could easily write a routine to do so, except that I have no clue what algorithm was used to generate the crc16 (polynomial, etc).
