hello_led.c

郑亚民版的可编程逻辑器件开发软件quatus ii里的一些例程

#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)
{
  
  while (1) 
  {
    led = 0;
  
    IOWR_ALTERA_AVALON_PIO_DATA(0x00001000, led);
    i = 0;
    while (i<500000)
    {
      i++;
    }
    led = 1;
    IOWR_ALTERA_AVALON_PIO_DATA(0x00001000, led);
    i = 0;
    while (i<500000)
    {
      i++;
    }
  }
  return 0;
}