7 segments display

Microtronix provides an example in their uclinux porting.

Maybe you could tell us where to find that example. I would be very interested too and haven't managed to find any examples.

Finally got this working. This example controls leds and 7-segment display. Tested with Nios II Development Kit, Cyclone II Edition. Disable processor type and features -> enable leds, seven segment display from kernel configuration to disable default blinking code.

#include <errno.h># include <stdio.h>
# include "nios2_system.h"
void nr_pio_showhex(int value)
{
  static unsigned char _hex_digits_data = {
    0x01, 0x4f, 0x12, 0x06, 0x4c, 0x24, 0x20, 0x0f, 0x00, 0x04, // 0-9
    0x08, 0x60, 0x72, 0x42, 0x30, 0x38                      // a-f
  };
  int led_value;
  // Left Hand Digit, goes to PIO bits 8-14
  led_value = _hex_digits_data;
  led_value |= (_hex_digits_data) << 8;
  na_seven_seg_pio->np_piodata = led_value;
}
int main (int argc, char* argv)
{
  int i;
  long x;
  np_pio *led;
  //np_pio *seven_seg;
   
  led = na_led_pio;
  //seven_seg = na_seven_seg_pio;
  
  while(1) {
    led->np_piodata = i;
    //seven_seg->np_piodata = i;
    nr_pio_showhex(i);
    i++;
    for(x=0; x<655350; x++);
  }
   
  return 0;
}

The software example/template "count binary", which ships with the Nios II IDE, also has some 7 segment display stuff. You'll have better luck using the style of coding in the examples shipped with the IDE.