东月之神

#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)
{
     const unsigned char table[10]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F};
     const unsigned char bit_set[4]={0xFE,0xFD, 0xFB, 0xF7};
     alt_u8 seg = 0;
     alt_u8 bit = 0;
     volatile int i, j;
    
     while(1)
     {
         for(i = 0; i < 4; i++)
         {
            seg = table[i];
            bit = bit_set[i];
            IOWR_ALTERA_AVALON_PIO_DATA(SEG_PIO_BASE, seg);
            IOWR_ALTERA_AVALON_PIO_DATA(BIT_PIO_BASE, bit);
            j = 0;
            while(j < 200)
                j++;
         }
   }
   return 0;
}