ex2_main.c

来自「Startup Example 1 for Arm GCC」· C语言 代码 · 共 22 行

/* ex2_main.c */

#define IOSET1 (*((volatile unsigned long *) 0xE0028014))
#define IODIR1 (*((volatile unsigned long *) 0xE0028018))
#define IOCLR1 (*((volatile unsigned long *) 0xE002801C))

int main (void)
{
	/* Define the LED pins P1.[16..23] as output */
	IODIR1 = 0x00FF0000;

	/* Clear all pins */
	IOCLR1 = 0x00FF0000;

	/* LED[7:0]; even on (high), odd off (low) */
	IOSET1 = 0x00550000;

	while(1);
	return 0;
}