beep_test.c.bak

uboot底层驱动

int sound_flag = 0;
int sound_time = 0;
void beep_test(void)
{
		int i, k;
 
	   // *(volatile unsigned int *)(0x1000c010) = 0X000013fa;
	   	//  *(volatile unsigned int *)(0x1000c010) = 0X181a;
	   	 *(volatile unsigned int *)(0x1000c010) = 0X181a;
	   	 for(i = 1; i<0x5; i++)
	   	 {
	   	 	for (k = 0; k < 0xffffff; k++) ;

         *(volatile unsigned long *)(0x1000c018) = 0Xff*i;
		// *(volatile unsigned long *)(0x1000c014) = 0xefffffff;
		 }
		//*(volatile unsigned long *)(0x1000c018) = 0X0000ffff;//PWM2_P?a?ü?ú??′??÷
        

		*(volatile unsigned int *)(0x1000c010) = 0 ;
		

	
}