buzzer.c

来自「该驱动程序是针对2410开发板的LED灯的驱动」· C语言 代码 · 共 44 行

#include "s3c2410.h"
#include "platform/smdk2410.h"
#include "types.h"

#define DELAYTIME	0x5000
#define BUZZER_ON	0
#define BUZZER_OFF	1

void delay(unsigned long n);
void buzzer(bool n);

int main(void)
{
	/* gpio initial */
	GPBCON = vGPBCON;

	while (1) {
		buzzer(BUZZER_ON);		/* buzzer off */
		delay(DELAYTIME);
		buzzer(BUZZER_OFF);		/* buzzer on */
		delay(DELAYTIME);
	}

	return 0;
}

/* delay some time */
void delay(unsigned long n)
{
	while (n--) {
		;
	}
}

/* control buzzer */
void buzzer(bool n)
{
	if (n) {
		GPBDAT |= n;
	} else {
		GPBDAT &= ~1;
	}
}