CodeWarrior for MCU中的主题 Re: Locating RAM variables

Locating RAM variables

Ben — Thu, 24 Jan 2013 14:58:51 GMT

Hello

I built several RAM arias in the project.

Please help me with CW C commands that will enable locating variables in a specific RAM zone.

(like SECTION in CW assembly).

TIA Benny

Re: Locating RAM variables

tiagomachado — Thu, 24 Jan 2013 16:38:37 GMT

In CW help, search for "@address".

From help menu:

Global Variable Address Modifier (@address)

Use the global variable address modifier to assign global variables to specific addresses.....

int glob @0x0500 = 10; // global variable "glob" is at 0x0500, initialized with 10

There are many other ways to use this modifier. Look there.

Hope it helps.

Re: Locating RAM variables

loosePointer — Thu, 24 Jan 2013 17:13:42 GMT

Have a look in the Linker Command File documentation.

You can tell the Linker to Place a symbol in a specific section, and address in your ".lcf"

This is how we place our software version at a known location.

___SOFTWARE_REVISION = 1;

WRITEW(0x05000000 + ___SOFTWARE_REVISION);

You could substitute the symbol for your array. But be carfull with the size of the array and the section it is in.

Re: Locating RAM variables

Ben — Fri, 25 Jan 2013 21:57:47 GMT

Thanks Tiago. I am trying it.

Re: Locating RAM variables

Ben — Fri, 25 Jan 2013 22:02:06 GMT

Thanks James, I'll have to check the lcf options. Do you have mapping sample in lcf?