EEpromPointer

Hi all,

I got some code from a colleague, when compiling, i notice i get errors when pointing to eeprom.

for example:

i have a boolean stored in eeprom:
Set_value[$08C8] : boolean;

UParaPntr : pointer;
UParaPntr:= (@Set_value);

The compiler givers me the error:
"Error: Pointer to EEprom not possible"

When my colleague compiles, everyting works fine.

I know i need to call a special function to get/set the value in eeprom using a pointer.
but it goes wrong when i make the pointer refere to the eeprom address..

Do i have to set some special bit to enable pointers to EEprom?

The only difference between my version and the one of my colleague is that he has a newer version of the compiler.
(i am working with revision 5.04.32, but when i read the changes since my version, i notice nothing about pointer to eeprom)

Regards,
Flor

Hi Flor,

the information you give is quite frugal. Anyway, I have added

{$EEPROM}
StructConst
Set_value[$08C8] : boolean = TRUE;

to my program header, I have added

{$IDATA}
Var
UParaPntr : pointer;

to my variable definition and I added into the source just before the main loop

UParaPntr:= (@Set_value);

Everything compiles fine. (ACRco 5.04.72) I have tried an older version of the compiler (5.04.24), and that compiled too.

For further investigation it would be helpful, if you post a full, tiny test program, that shows the error.

Michael

Hi Merlin,

No, i declaired my variable in eeprom,
The pointer is declaired in another unit, as a variable in ram...

the error "Pointer to EEprom not possible", referes to all the lines where i let the pointer point to the variables stored in eeprom..

unit E_Dec;
interface
{$IDATA}
const
.....

{$EEPROM}
var
...
Set_value[$08C8] : boolean;

---------------------------------------------

procedure xxx;
var
UParaPntr : pointer;
begin
UParaPntr:= (@Set_value);
end


But when i open the project in the old IDE, using version 5.04.32, i stell get the errors.

The good news is that i updated the software and now everything compiles as it should (5.04.77).
So i'll be working in version 5.04.77 from now on.

Thanks for looking into the problem anyway,

Regards,
Flor