Page 358 - Programming Microcontrollers in C

Digital Signal Processor Operations 343

#include “hc16.h”
#include “sim.h”
#include “qsm.h”

int putchar(char new_character);
void dprint (int c);
int handle_data(int new_data);

int data[64] @0x2000;
int coef[32] @0x2100;

void main(void)
{
int circular_conv(char, int*, char, int*);
int point[128],i,j,*ip;

/* initialize the SIM */
SYNCR.X=1; /* set the system freq to 16.78 MHz */
SYPCR.SWE=0; /* disable the watchdog */

/* initialize the SCI */
SCCR0.SCBR=55; /* set baud rate to 9600 */
SCCR2.TE=1; /* enable the transmit of the SCI */

for(i=0;i<64;i++)
data[i]=0x00;
for(i=0;i<32;i++)
coef[i]=0x100;
for(i=0;i<64;i++)
{
/* get new data—use 0x100 for this test */
ip=data+handle_data(0x100);
point[i]=circular_conv(64,ip,32,coef);
}
for(i=0;i<8;i++)
{
for(j=0;j<8;j++)
{
dprint(point[j+8*i]);
putchar(‘ ‘);
}