ex9_1.c

Practical DSP Applications in Communications Real-Time Digital Signal Processing Implementations,

/* 
    ex9_1.c - Example 9-1: Test cosine and sine function 
              by table lookup method 
              Calls cos_sin.asm and uses tab0_pi.asm
*/

#define LEN 0x100

extern void cos_sin(int, int *, int *);
int cos_a[LEN];   /* cosine buffer */
int sin_a[LEN];   /* sine buffer */
int alpha;  
int delta;                  

main()
{                      
	int i;
	
	alpha = 0;
	delta = 0x1000;         
	for (i=0; i<LEN; i++)
	{
	    alpha += delta;
	    cos_sin(alpha, &cos_a[i], &sin_a[i]);
    }                                     
    
}