[嵌入式]51单片机在无源蜂鸣器上循环演奏低音“DO、RE、MI、FA、SO、LA、SI”这7个音调。

题目：在无源蜂鸣器上循环演奏低音“DO、RE、MI、FA、SO、LA、SI”这7个音调。

音调表：

?编程思路：

#include <reg52.h>
#include "TimeInit.h"
#define Fosc (11059200L)
unsigned char i=0￡?
unsigned char	cnt=0;	
//char Tone[]={'D','R','M','F','S','L','x'};

code unsigned char FreqH[]={0xF8,0xF9,0xFA,0xFA,0xFB,0xFB,0xFC};
code unsigned char FreqL[]={0x8B,0x5B,0x14,0x66,0x03,0x8F,0x0B};
sbit beep=P3^7;


void main(void)
{
	T0Init(10);
	T1Init(50); 
	while(1);
}
void T0Tnt(void) interrupt 1
{	

	VTH0=FreqH[i];
	VTL0=FreqL[i];

	TH0=VTH0;
	TL0=VTL0;
	beep=~beep;
	
}
void T1Tnt(void) interrupt 3
{
	TH1=VTH1;
	TL1=VTL1;
	cnt++;
	if(cnt>=10)
	{
		cnt=0;
		i++;
		if(i>=7)
		{
			i=0;
		}
		
	}	
}

?

#include <TimeInit.h>

#define Fosc (11059200L)
unsigned char VTH0,VTL0,VTH1,VTL1;
void T0Init(unsigned int vT0) 
{
	TMOD=(TMOD&0xf0)|0x01;
	VTH0=(65536-vT0*11/12)/256;
	VTL0=(65536-vT0*11/12)%256;
	TH0=VTH0;
	TL0=VTL0;
	EA=1;
	ET0=1;
	TR0=1;
}
void T1Init(unsigned char vT1) 
{
	TMOD=(TMOD&0x0f)|0x10;
	VTH1=(65536-vT1*Fosc/12000)/256;
	VTL1=(65536-vT1*Fosc/12000)%256;
	TH1=VTH1;
	TL1=VTL1;
	EA=1;
	ET1=1;
	TR1=1;
}

?

?

#ifndef _TIMEINIT_H_
#define _TIMEINIT_H_

#include <reg52.h>
#define Fosc (11059200L)

extern unsigned char VTH0,VTL0,VTH1,VTL1;
extern void T0Init(unsigned int vT0);
extern void T1Init(unsigned char vT1);

#endif 

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