Hi @ll,
i am a a newbie to DSP's and have a lot of questions. My first problem
is the perfomance.
I have a ADSP-BF535 EZ-Kit Lite.
There is an example how to alternate blinking PF0/PF2 and PF1/PF3 using
a delay loop
I try to get the max. performance but i couldn't alternate the pins
faster then with 8 MHz. Please tell me how to modify the C-Source to
get the max. perfomance.
/*****************************************************************************/
/***This program alternates blinking PF0/PF2 and PF1/PF3 using a delay
loop***/
/***This program is written in C. */
/* This program also shows an example on how to modify the C run-time
header***/
/*****************************************************************************/
#include <sys/exception.h>
#include <sys/excause.h>
#include "defBF535.h"
#define DELAY_LOOP 0xFFFFF
/*global variables*/
volatile unsigned short * fio_dir_reg;
volatile unsigned short * fio_set_reg;
volatile unsigned short * fio_clr_reg;
/*function prototype*/
void delay(void);
/*void main()*/
void main()
{
fio_dir_reg = (unsigned short *)FIO_DIR;
fio_set_reg = (unsigned short *)FIO_FLAG_S;
fio_clr_reg = (unsigned short *)FIO_FLAG_C;
/* set PF0 - PF3 as output */
*fio_dir_reg = (unsigned short)0x000F;
asm("ssync;");
int a,b,c;
for(;;)
{
/* clear all the LED */
*fio_set_reg = (unsigned short)0x000F;
/* set LED to 0xA pattern */
*fio_clr_reg = (unsigned short)0x000F;
}
}
/* simple delay routine */
void delay()
{
unsigned long i;
for(i=0; i<DELAY_LOOP; i++)
{
asm("nop;nop;nop;nop;");
}
return;
}
Thank's
mswierzy