ARM用按键控制蜂鸣器频率

#define GPFCON (*(volatile unsigned *)0x56000050)
#define GPFCON (*(volatile unsigned *)0x56000054)
#define GPFCON (*(volatile unsigned *)0x56000058)
#define GPBCON (*(volatile unsigned *)0x56000010)
#define GPBCON (*(volatile unsigned *)0x56000014)
#define GPBCON (*(volatile unsigned *)0x56000018)
void Delay(int count)
{
 unsigned int i;
 while(--count!=0)
 {
  for(i=0;i<0xfff;i++);
 }
}

void BEEP_ON()
{
 GPBDAT|=0x01; //GPBDAT第一位控制蜂鸣器，低电平响，高电平停
}

void BEEP_OFF()
{
 GPBDAT&=0xfffe;
}

void BeepCount(unsigned char count)
{
 unsigned int time;
 time=count*120;
 if(time!=0)