Turn on 4 leds nios II

Altera_Forum · ‎06-20-2013

hello,

I have a FPGA Cyclone III ep3c25. I use NIOS II, I turn on the first LED. Now how to turn the 4 LEDs.

i use this code to blink first led.

#include <stdio.h># include "system.h"# include "altera_avalon_pio_regs.h"
int main()
{
  printf("Hello from Nios II!\n");
int count=0;
int delay;
  while(1)
  {
	  		IOWR_ALTERA_AVALON_PIO_DATA(LED_PIO_BASE,count & 0x01);
	  	       delay=0;
	               while(delay < 2000000)
                       {
		                delay++;
	                 }
                         count++;
  }
  return 0;
}

Altera_Forum · ‎06-20-2013

Replace count & 0x01 with count & 0x0F and all your 4 LEDs will toggle according to the count binary code

Altera_Forum · ‎06-20-2013

only first led blinking :(

i use sopc of kits/standards

Altera_Forum · ‎06-21-2013

Are the LEDs correctly connected to upper bits of PIO port?

Are the PIO/LED signals correctly assigned to the FPGA pins driving the LEDs?

If the PIO has bidir capability, are the upper PIO pins configured as outputs?