write continuous data to sdram on DE0 nano board

Hi FJumaah,

Thanks for the reply!

Now I modify my code to use alt_ic_isr_register(...) function,

But unfortunately, the code is still stuck at the 65th press of the key😞

whether alt_ic_isr_register or alt_irq_register the results are the same.

#include <stdio.h>
#include <unistd.h>
#include "system.h"
#include "alt_types.h"
#include "io.h"
#include "altera_avalon_pio_regs.h"
#include "sys/alt_irq.h"
 
int bKeyPressed = 0;
int cnt = 1;
alt_u16 incre = 0;
alt_u16 data;
volatile int edge_capture;
 
void KEY_ISR(void* context){
 
        bKeyPressed = 1;
 
        // clear interrupt flag
        IOWR_ALTERA_AVALON_PIO_EDGE_CAP(KEY_BASE,0);
        printf("isr\n");
}
 
 
static void init_button_pio(){
 
	void* edge_capture_ptr = (void*) &edge_capture;
	// enable interrupt, 2-keybutton
	IOWR_ALTERA_AVALON_PIO_IRQ_MASK(KEY_BASE,0x03);
    // clear capture flag
    IOWR_ALTERA_AVALON_PIO_EDGE_CAP(KEY_BASE,0);
 
	#ifdef ALT_ENHANCED_INTERRUPT_API_PRESENT
    	alt_ic_isr_register(
    			KEY_IRQ_INTERRUPT_CONTROLLER_ID,
    			KEY_IRQ,
    			KEY_ISR,
    			edge_capture_ptr,
    			0x0);
    	printf("ENHANCED mode\n");
	#else
    	alt_irq_register (KEY_IRQ, edge_capture_ptr, KEY_ISR);
    	printf("LEGACY mode\n");
	#endif
 
}
 
 
int main()
{
	init_button_pio();
	IOWR(LED_BASE, 0, (alt_u8)0);
 
	while(1)
	{
		if(bKeyPressed)
		{
			bKeyPressed = 0;
 
			*((alt_u8*)NEW_SDRAM_CONTROLLER_0_BASE + incre) = cnt;
			data = *((alt_u8*)NEW_SDRAM_CONTROLLER_0_BASE + incre);
 
			printf("cnt = %d, ", cnt);
			printf("incre = %d, ", incre);
			printf("data=%x\n", data);
			IOWR(LED_BASE, 0, (alt_u8)data);
			cnt ++;
			incre += 1;
		}
	}
 
	printf("b\n");
  return 0;
}