Page 355 - Programming Microcontrollers in C

340 Chapter 6 Large Microcontrollers

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]=i*0x100;
for(i=0;i<32;i++)
coef[i]=(31-i)*0x100;

for(i=0;i<64;i++)
{
ip=data+i;
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(‘ ‘);
}
putchar(0xd);
putchar(0xa);
}
}

int putchar(char new_character)
{
while(SCSR.TDRE==0); /* wait until transmit buffer empty */
SCDR=new_character;/* send out byte and reset TDRE */
}
void dprint (int c)
{
if(c<0)
{
putchar(‘-’);
c=-c;
}
if ( c/10)
dprint(c/10);
putchar(c%10+’0');
}
Listing 6-11: A Test Program for Circular Convolution