Problems with CRC table

I have a C8051F340 cygnal processor and a section of code that does a CRC calculation. The calculation uses a 256 variable 16 bit integer thats initialized at compile time. Like this:
static const uint16_t fcstab[256] = { initialization values };

The code compiles, but locks up before it gets to main with this variable and its initialization. If i take out the initialization and leave the variable simply declared, the code runs fine.

I've tried pdata, and idata keywords, but it seems like the array is too large. Any ideas? Thanks.

 RE: Problems with CRC table

static const uint16_t fcstab[256] = { initialization values };
Guessing that your uint16_t does not include a memory area qualifier, you are "initializing" the registers, the stack and each and every DATA and IDAT variable.

"initializing" the stack in the middle of the code WILL blow whatever you are doing.

Erik

PS why have you declared the toolset 'none' the F340 (at least regarding tools) is a '51.

 RE: Problems with CRC table

static const uint16_t fcstab[256] = { initialization values };

Write "code" instead of "const", and it'll probably work out a good deal better.

 RE: Problems with CRC table

Thanks! "code" instead of "const" worked! What does the code keyword do?

 RTFM!

"'code' instead of 'const' worked! What does the code keyword do?"

You should never consider a problem to be fixed if you don't understand why your changes fixed it...

The code keyword extension is described here:

http://www.keil.com/support/man/docs/c51/c51_le_code.htm
http://www.keil.com/support/man/docs/c51/c51_le_pgmmem.htm

Sounds like you need to spend some time familiarising yourself with the contents of the C51 Manual

Possibly also the so-called "bible" for the 8051:

Chapter 1 - 80C51 Family Architecture:
http://www.nxp.com/acrobat_download/various/80C51_FAM_ARCH_1.pdf

Chapter 2 - 80C51 Family Programmer's Guide and Instruction Set:
http://www.nxp.com/acrobat_download/various/80C51_FAM_PROG_GUIDE_1.pdf

Chapter 3 - 80C51 Family Hardware Description:
http://www.nxp.com/acrobat_download/various/80C51_FAM_HARDWARE_1.pdf