best look up table implementation in C

Altera_Forum · ‎11-02-2015

Hello all,

I am doing a project that required to have a look up table for my C programming coding, i read there are several tutorial that i could refer but wish to seek for the best code efficient usage, any tips?

BR, Ray

Altera_Forum · ‎11-03-2015

Hey, you can implement this with a set of arrays...just make this simple as possible.

check this out

"http://www.edaboard.com/thread178540.html"

Altera_Forum · ‎11-04-2015

did you manage to try out? you can either just print out the data for checking or use a debug to view those variable create..

Altera_Forum · ‎11-05-2015

Yeap, initial testing looks good.... any way to optimize this to use lower memory? I'm using a MAX 10 here,,, limited resources.

Altera_Forum · ‎11-13-2015

how huge is your looks up table? I believe still able to fit in your MAX10.

Altera_Forum · ‎01-30-2017

You may check this

Code:


# define NUMBER_OF_ROWS 5
# define NUMBER_OF_COLS  4
static int myArray =
{
{5, 10, 15, 20},
{12, 10, 8, 8},
{24, 22, 20, 18},
{34, 32, 30, 29},
{46, 43, 43, 43}
};
void main(void)
{ int i, j;
printf("\n The contents of myArray are:\n");
for (i = 0; i < NUMBER_OF_ROWS; i++)
{ for(j = 0; j < NUMBER_OF_COLS; j++)
printf("%5d", myArray);
printf("\n");
}
}

But, since your rows and colums are not in sequence, so you may have either full lookup table (10 rows, 20 colums) or you need to divide your X and Y by specific value (rows divide by 2, colums divide by 5) to access the table