嵌入式S3C2440:控制LED灯

发光二极管接口（左端）应为低电平

 

以LED1为例

LED1的接口为GPB5

void led_init(void)
{//配置GPB5功能为输出GPBCON &= ~(0x3 << 10);GPBCON |= (0x1 << 10);	//使GPB5输出高电平(关灯)GPBDAT |= (1 << 5);
}void led_on(void)
{GPBDAT &= ~(1 << 5);
}void led_off(void)
{GPBDAT |= (1 << 5);
}

int main(void)
{
//	unsigned int * gpbcon = (unsigned int *)0x56000010;led_init();while(1){led_on();led_off();}}