507cbd841448001e12559e261070f3e7

de2板上的led显示程序

#include "system.h"
#include "altera_avalon_pio_regs.h"
#include "alt_types.h"

int main (void) __attribute__ ((weak, alias ("alt_main")));

int alt_main (void)
{
  alt_u8 led = 0x2; 
  volatile int i;
  
  while (1) 
  {
   for(i=0;i<300000;i++);
   led = 0x1;
   *(unsigned int *)LED_PIO_BASE = led;
   for(i=0;i<300000;i++);
   led = 0x2;
   *(unsigned int *)LED_PIO_BASE = led;
  }

  return 0;
}