array in constant?

[SpiritHunter]

hi every one. i am fresh here. i got a problem with coding about arrays.

what i wanted to do is to create an array which have a series of constants that i won't be changing during runtime.

i believe there is a code which is like " a var byte[10] " is possible but this required the pic's ram and the ram is pretty limited. so, can i create the array as in constant or as code which i can den use later on?

futher more, how to put in data in array mode? which some thing like " a[] = {1 2 3 4 5 6 7} "

thank you

[Bruce]

LOOKUP a,[1,2,3,4,5,6,7],b.

a & b would be byte variables. a = the index pointer. b = the byte variable
the constant value from the table is placed in.

a = 1
LOOKUP a,[1,2,3,4,5,6,7],b

b now = 2.

This creates a constant array in ROM similar to const char a[]={1,2,3,4,5,6,7};
in C where b=a[1].

[SpiritHunter]

this means that i can put
LOOKUP A,[.......],B

but how can i refer to the A later on?

eg. lookup a,[ 1 2 3 ],b

den how can i do like x= a[1] + a[2] ?

[Bruce]

If you need x= a[1] + a[2] then you'll need to create a standard array of
RAM variables.

Or do something like this;

Main:
     a = 1
     GOSUB GetConst
     X = b
     a = 2
     GOSUB GetConst
     X = X + b ' now X = a[1]+a[2]
     GOTO Main

GetConst:
     LOOKUP a,[1,2,3,4,5,6,7],b
     RETURN

[SpiritHunter]

thanks alot bruce, i think i understand already. will try out 2moro.

[SpiritHunter]

wow.. thanks.... o ya... 1 more question... how many constant can i write in a single bracket? and... is there a problem if i write like this?

LOOKUP a,[1,2,3,4,5,6,7
,b

[SpiritHunter]

wow.. thanks.... o ya... 1 more question... how many constant can i write in a single bracket? and... is there a problem if i write like this?

LOOKUP a,[1,2,3,4,5,6,7
,8,9,10],b