hello_world.c

基于FPGA的音频分析仪

#include <string.h>
#include "sys/alt_irq.h"
#include "alt_types.h"
#include "stdio.h"
#include "altera_avalon_pio_regs.h"
#include "system.h"

alt_u8 scan_cord;
/*中断服务程序*/
static void cus_avalon_keyboard_irq (void* context, alt_u32 id)
{
   scan_cord=IORD(KEYBOARD_0_BASE,0);
   printf("%x\n",scan_cord);
}


void main(void)
{
   int i;
   scan_cord=IORD(KEYBOARD_0_BASE,0);
   alt_irq_register (KEYBOARD_0_IRQ, KEYBOARD_0_BASE, cus_avalon_keyboard_irq);
   while(1)
   {
     i++;
   }
}