Subversion Repositories wdsp

#include "../support/support.h"
#include "../support/board.h"
#include "../support/uart.h"
#include "coefs_sos.h"
 
#include "../support/spr_defs.h"
 
#define IIR_BASE 0x9d000000
#define IIR_CONTROL 0
#define IIR_DATA 4
#define IIR_STATUS 8
#define IIR_NSECTT 12
#define IIR_GAIN 16
#define IIR_COEFF 20
 
void uart_print_str(char *);
void uart_print_long(unsigned long);
 
// Dummy or32 except vectors
void buserr_except(){}
void dpf_except(){}
void ipf_except(){}
void lpint_except(){}
void align_except(){}
void illegal_except(){}
/*void hpint_except(){
 
}*/
void dtlbmiss_except(){}
void itlbmiss_except(){}
void range_except(){}
void syscall_except(){}
void res1_except(){}
void trap_except(){}
void res2_except(){}
 
 
void uart_interrupt()
{
    char lala;
    unsigned char interrupt_id;
    interrupt_id = REG8(UART_BASE + UART_IIR);
    if ( interrupt_id & UART_IIR_RDI )
    {
        lala = uart_getc();
        uart_putc((lala>>1)&0xff);
 
 
//        uart_putc('A');
 
 
//uart_print_short(lala);
 //       uart_putc('\n');
    }
}
 
 
void uart_print_str(char *p)
{
        while(*p != 0) {
                uart_putc(*p);
                p++;
        }
}
 
void uart_print_long(unsigned long ul)
{
  int i;
  char c;
 
 
  uart_print_str("0x");
  for(i=0; i<8; i++) {
 
  c = (char) (ul>>((7-i)*4)) & 0xf;
  if(c >= 0x0 && c<=0x9)
    c += '0';
  else
    c += 'a' - 10;
  uart_putc(c);
  }
 
}
 
void uart_print_short(unsigned long ul)
{
  int i;
  char c;
  char flag=0;
 
 
  uart_print_str("0x");
  for(i=0; i<8; i++) {
 
  c = (char) (ul>>((7-i)*4)) & 0xf;
  if(c >= 0x0 && c<=0x9)
    c += '0';
  else
    c += 'a' - 10;
  if ((c != '0') || (i==7))
    flag=1;
  if(flag)
    uart_putc(c);
  }
 
}
 
 
char str[100];
 
int main()
{
int c,k,j,r_in,r_out;
	uart_init();
 
	int_init();
	int_add(UART_IRQ,&uart_interrupt);
 
 
//Nsections-1
		REG32(IIR_BASE+IIR_NSECTT)=NSECT-1;
 
//Gain
		REG32(IIR_BASE+IIR_GAIN)=(int)gk;
 
//Coef Write
    for (k=0;k<(6*NSECT);k++){
        	REG32(IIR_BASE+IIR_COEFF+(k*4))=(int)SOS[k];
		r_out=REG32(IIR_BASE+IIR_COEFF+(k*4));
 
    }
 
uart_print_str("IIR filter impulse response :\n ");
 
                //Writes kronecker delta
 
       		REG32(IIR_BASE+IIR_DATA)=(int)(32767);
		REG32(IIR_BASE+IIR_CONTROL)=1;//Start
		while(REG32(IIR_BASE+IIR_STATUS)==0) ;
		REG32(IIR_BASE+IIR_STATUS)=1;
 
 
                //Waits for filtering 
		while(REG32(IIR_BASE+IIR_STATUS)==0) ;
		REG32(IIR_BASE+IIR_STATUS)=1;
 
//Reads filter output
r_out=REG32(IIR_BASE+IIR_DATA);
		int10_to_str(r_out,str,-10);
	   	uart_print_str(str);
			uart_putc(' ');
 
 
     //Writes 999 zeros
    for (k=0;k<((1000)-1);k++){
		REG32(IIR_BASE+IIR_DATA)=0;
		REG32(IIR_BASE+IIR_CONTROL)=1;//Start
 
                //Waits for filtering 
		while(REG32(IIR_BASE+IIR_STATUS)==0) ;
		REG32(IIR_BASE+IIR_STATUS)=1;
 
//Reads filter output
r_out=REG32(IIR_BASE+IIR_DATA);
		int10_to_str(r_out,str,-10);
	   	uart_print_str(str);
			uart_putc(' ');
 
	}
 
	report(0xdeaddead);
	or32_exit(0);
}