constant array

[tass]

hellow all
i have a problem to get the address of a constant array in the program memory in order to pass it as a parameter to a function the constant is declared in a separate module :

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module Mymodule
public const MyArray() as byte = (.............)

and the code of the programm is like this

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dim addr as longword
...
...
add = addresssof(MyArray(0))
mysub(addr)

the compiler error is : the expression can not be passed by refernce
is there another solution?

[octal]

use this:

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addr = @MyArray

note that you can pass your CONST ARRAY directly as a param to your sub by specifiying ByRefConst as param passing type.


regards
octal

[tass]

I testet it but i have the same merror message
and i cant pass my const as a param because i must access the data by calculating its position in the array witch is too long (30 Kbytes)

[David Barker]

copy and paste this code

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Public Const MyArray() As Byte = (1,2,3,4,5)
Dim addr As Word
addr = @MyArray
End

then compile. Do you still see an error message?

> and i cant pass my const as a param because i must
> access the data by calculating its position in the array
> witch is too long (30 Kbytes)

Arrays are passed by reference, not value.

[tass]

thanks DAVID it's OK realy there isn't a problem because a have done a mistake because i wrote in the code @MyArray() so using @MyArray whithout brackets was the solution
I have used this big const array to test the porting of MPFS2.c to swordfih basic and it's works fine now , i hope that i will finish the porting of the rest of the microchip TCT/IP stack in 2-3 weeks when i purchase a licene (now i'm using SE version)

[David Barker]

Good luck with that - let us know how you get on...