topic Re: assigning constant data into code space in Classic/Legacy CodeWarrior

assigning constant data into code space

stevec — Thu, 28 Aug 2008 20:14:58 GMT

I am porting an application over from the Keil C51 compiler. I am storing some constants in code space and the C51 code is

void say(unsigned char word, unsigned char offset)
{
    unsigned long word_address;

    // word address high byte table
    code unsigned char addresstablehi[] = { 0x00,0x00,0x00,0x00,0x01,0x01,0x04,0x07 ,0x08 } ;
    .
    .
How do I perform this in CW.
The address table values are calculated by another program which produces a text file in the correct format so that I can cut and paste into the compiler, so I would hope the CW code would be similar.

Steve

Re: assigning constant data into code space

J2MEJediMaster — Thu, 28 Aug 2008 22:34:39 GMT

Doing I quick search on this forum, I found the following link which might get you started.

Also, it would probably help if you mentioned what version of CodeWarrior you're using and what MCU you're targeting.

---Tom

Re: assigning constant data into code space

stevec — Thu, 28 Aug 2008 22:52:05 GMT

Thanks, I'm using CW 5.7 and using an MC9S08RE16.

Re: assigning constant data into code space

CompilerGuru — Fri, 29 Aug 2008 04:48:04 GMT

Make your table static const.
For globals const alone is enough, but for locals you have to make them static (function static) too, otherwise CW will still allocate them on the stack.

Daniel