struct

Altera_Forum · ‎01-09-2007

The following code works fine:

# define RAMSHADOWBASE 0x01010000# define TESTVARIABLE (*(unsigned int*)RAMSHADOWBASE)

Now I want to add a struct on the same way. Thus I want to place a structure on a predefined adress in RAM memory.

Struct looks like:

struct Defs

{

unsigned int Nr;

unsigned int Place;

} lacingHole[40];

Somebody a solution for this?

Altera_Forum · ‎01-22-2007

Nobody a solution????

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originally posted by innotronics@Jan 9 2007, 10:40 AM

the following code works fine:

# define ramshadowbase 0x01010000# define testvariable (*(unsigned int*)ramshadowbase)

now i want to add a struct on the same way. thus i want to place a structure on a predefined adress in ram memory.

struct looks like:

struct defs

{

unsigned int nr;

unsigned int place;

} lacinghole[40];

somebody a solution for this?

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Altera_Forum · ‎01-22-2007

Hi innotronics,

There are two common ways of accomplishing what (I believe) you want:

1, access the structure via a pointer:

#define DEFSBASE  0x01010000
struct Defs *pDefs = (struct Defs *) DEFSBASE;
...
pDefs->Nr = <<whatever>>

or ...

2. put the structure in a named section ...

struct Defs  myDefs __attribute__ ((section (",defs")));
myDefs.Nr = <<whatever>>

... then locate the section where you want in your linker command file.

__defs_start = .;
    .defs :
    {
   *(.defs)
    }

Regards,

--Scott