74HC573 + Beeper(有源)

code can’t beat picture

void CloseBeeper()
{
 P2 = (P2 & 0x1F) | 0xA0;	//關閉Beeper
 P0 &= 0xAF;
 P2 = 0x00;
 
 P2 = (P2 & 0x1F) | 0x80;	//關閉LED
 P0 = 0x00;
 P2 = 0x00;
}