Constant Array in C

[Suraj143]

In assembly we writing tables in program memory.But in C language we are writing an array in the PIC memory.How can I store my array in program memory without wasting valuable RAM?

short num=0;
short ssd [10]={0,1,2,3,4,5,6,7,8,9,};

void main (){
	TRISB=0x00;
	PORTB=0x00;

while(1){
	PORTB=ssd[num];
	num++;
	if(num==10)num=0;
	delay_ms(1000);
	}
}

 

[nsaspook]

In assembly we writing tables in program memory.But in C language we are writing an array in the PIC memory.How can I store my array in program memory without wasting valuable RAM?

short num=0;
short ssd [10]={0,1,2,3,4,5,6,7,8,9,};

void main (){
	TRISB=0x00;
	PORTB=0x00;

while(1){
	PORTB=ssd[num];
	num++;
	if(num==10)num=0;
	delay_ms(1000);
	}
}

In C18 you could use:
const rom short ssd [10]={0,1,2,3,4,5,6,7,8,9,};

 

[Suraj143]

Hi I use mikroC. will it support that?

 

[Ian Rogers]

Just lookup the "const" keyword in your documentation... In hitech I just use const int ssd[] = {1,2,3,4,5,6,7,8};

No need to specify the size of the array as it's initialized as well.

 

[Suraj143]

Guys I tried like this.

const short ssd[10]={0,1,2,3,4,5,6,7,8,9};

But in debug window it shows it still wasted RAM from 20h onwards.

 

[Ian Rogers]

You can find this on page 136 of your manual

According to the mikroC manual it's initialized like this using the code keyword.

const short code ssd[10]={0,1,2,3,4,5,6,7,8,9};

 

[Suraj143]

Hi Ian this code works.

const short ssd[10]={0,1,2,3,4,5,6,7,8,9};

Thanks