OK6410 timer accurately controls buzzer

For various instructions, please refer to the previous article on LED control: http://www.51hei.com/mcu/2503.html. Since the source code provided by Feiling is not a program for the timer to accurately control the buzzer, I wrote one myself. Comrades in the group who need the bare metal program source code can download it from my space by themselves. The program debugging is available. Please pay attention to add Feiling's int.s file, otherwise it cannot be compiled in CodeWarrior. For files with various conditions, please refer to Feiling paf. Here I only provide the program code.

 #define GPFCON (*(volatile unsigned*)(0x7F0080A0))
#define GPFDAT (*(volatile unsigned*)(0x7F0080A4))
#define GPFPUD (*(volatile unsigned*)(0x7F0080A8))

#define PCLK 66000000 
#define HCLK 133000000 

#define TCFG0 (*(volatile unsigned*)(0x7F006000))
#define TCFG1 (*(volatile unsigned*)(0x7F006004))
#define TCON (*(volatile unsigned*)(0x7F006008))
#define TCNTB0 (*(volatile unsigned*)(0x7F00600C))
#define TCMPB0 (*(volatile unsigned*)(0x7F006010))
#define TCNTO0 (*(volatile unsigned*)(0x7F006014))
#define TCNTB1 (*(volatile unsigned*)(0x7F006018))
#define TCMTB1 (*(volatile unsigned*)(0x7F00601C))
#define TCNTO1 (*(volatile unsigned*)(0x7F006020))
#define TCNTB2 (*(volatile unsigned*)(0x7F006024))
#define TCNTO2 (*(volatile unsigned*)(0x7F00602C))
#define TCNTB3 (*(volatile unsigned*)(0x7F006030))
#define TCNTO3 (*(volatile unsigned*)(0x7F006038))
#define TCNTB4 (*(volatile unsigned*)(0x7F00603C))
#define TCNTO4 (*(volatile unsigned*)(0x7F006040))
#define TINT_CSTAT (*(volatile unsigned*)(0x7F006044))

void udelay(unsigned int num)
{
unsigned int val;
val=PCLK/1000000-1;
TCFG0&=~(0xff<<8);
TCFG0|=(0x00<<8);
TCFG1&=~(0xf<<8);
TCFG1|=(0x0<<8);
TCNTB2=val;
TCON&=~(0xf<<12);
TCON|=(0xb<<12);
TCON&=~(2<<12);
while(num--)
{
while(TCNTO2>=val>>1);
while(TCNTO2>1);
}
}
void init(void)
{
GPFCON&=~(2<<30);
GPFCON|=(1<<30);
GPFPUD&=~(0x3<<(2*15));
GPFDAT|=(0x8000);
}

void beep_off(void)
{
GPFDAT|=0x8000;
}

void beep_on(void)
{
GPFDAT&=0x7fff;
}
void beep(void)
{
while(1)
{
int i,j;
beep_on();
for(i=0;i<1000;i++)
udelay(1000);
beep_off();
for(j=0;j<5000;j++)
udelay(1000);
}

}
int main()
{
init();
beep();
}

 
int.s
IMPORT      main
    
AREA |C$$code|, CODE, READONLY
global start

start    
    bl        main
    
    END