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Altera_Forum's avatar
Altera_Forum
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16 years ago

Simply blink a led with uCLinux

Hi i want to blink a led inside my linux, i can do it without problems using NIOS2-IDE but not inside Linux! What do i need to enable in makemenuconfig?

Thanks.

This is my program.. 

#include <stdio.h># include </home/aprado/LinuxFPGA/NOMMU/nios2-linux/uClinux-dist/linux-2.6.x/include/asm-nios2/nios2.h>
int main(void)
{
 printf("hello world\n");
while(1){
*na_led_green = 1;
};
}

the error i get 

In file included from hello.c:2:
/home/aprado/LinuxFPGA/NOMMU/nios2-linux/uClinux-dist/linux-2.6.x/include/asm-nios2/nios2.h:82:28: asm/pio_struct.h: No such file or directory
hello.c: In function `main':
hello.c:7: error: `np_pio' undeclared (first use in this function)
hello.c:7: error: (Each undeclared identifier is reported only once
hello.c:7: error: for each function it appears in.)
hello.c:7: error: syntax error before ')' token

what is inside my ASM-NIOS2 

$ ls
asm-offsets.h  nios2.h

1 Reply

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    16 years ago

    Problem solved 

    
# include <stdio.h># define led_green (char*) 0x00681080 // Base adress in SOPC Builder
int main(void)
{
  int tempo,i;
  printf("time to keep led on\n");
  scanf("%i",&tempo);
  for (i=0; i<tempo; i++)
  {
    *led_green='1';
    usleep(1000);
  }
  *led_green = 0;
  return 0;
}

    my code