CCS/TMS320F28034: Address of Variables/Functions....

Dear Ki,

     Good afternoon,

     I can not open the Link  ：）

     My problem is :

when I define a global Variables, I can find the address at .MAP file;

But I can't not find the address of STATIC Variables in a .C file  and temporary Variables in Funcs ;

How can I know these variables are allocated at the right address ?

    tks a lot !

    have a nice day !

Things like local variables would get allocated at run time so you would not know right after compilation.

What I mean is :

     when the program is running in the Chip , how does it allocate the local variables ? what is the mechanism ? 

     How can I know if it's running out of RAM space ?

     tks

Jacky Xiao1 said:

But I can't not find the address of STATIC Variables in a .C file

Please see this forum thread.

Jacky Xiao1 said:

and temporary Variables in Funcs

Those addresses are relative to the stack pointer (SP).  So they are different every time the function runs.

Thanks and regards,

-George

Good morning George,

     for the temporary variables, it's relatived to Stack Pointer!

     if there is a multi task OS in the DSP , the SP will point to  different task's stack space when running different tasks,  so  the temprary variables will be at different task's stack space , is that right ?

     for the static variables, how do I add the link option at CCS so that I can see the address in the MAP file ?

tks

have a nice day !

• Version of the host OS : win 10
• Provide exact version number of CCS : 5.4.0

Jacky Xiao1 said:

 if there is a multi task OS in the DSP , the SP will point to  different task's stack space when running different tasks,  so  the temprary variables will be at different task's stack space , is that right ?

That's probably right.  But it depends on the details of how the multi-tasking OS works.  

Jacky Xiao1 said:

for the static variables, how do I add the link option at CCS so that I can see the address in the MAP file ?

Use the linker option --mapfile_contents=sym_defs.

Thanks and regards,

-George

Good afternoon George,

       For the uCOS situation (every task have it's own stack space).

       the temprary variables will be at it's related task's stack space , is that right ?

      tks 

have a nice day !

You are probably right.  Because I am not familiar with uCOS, so I cannot say for sure.

Thanks and regards,

-George