led.c

来自「英培特ARM教学平台EDUKIT-III」· C语言 代码 · 共 49 行

/*
 * led.c
 */

#include "s3c2410.h"

#define LED_ON	0x00
#define LED_OFF	0xff
#define LED1_ON	0xd0
#define LED2_ON 0x70
#define LED3_ON 0xe0
#define LED4_ON	0xb0

#define DELAYTIME	0x5000

void delay(unsigned int n)
{
	while (n--) {
		;
	}
}

void led_on(char n)
{
	if (n == 1) {
		GPFDAT = LED1_ON;
	} else if (n == 2) {
		GPFDAT = LED2_ON;
	} else if (n == 3) {
		GPFDAT = LED3_ON;
	} else if (n == 4) {
		GPFDAT = LED4_ON;
	} else if (n == 0) {
		GPFDAT = LED_OFF;
	} else {
		GPFDAT = LED_ON;
	}
}

void led_circle(void)
{
	unsigned char i;

	for (i=1; i<5; i++) {
		led_on(i);
		delay(DELAYTIME);
	}
}