实际运用呼吸灯（电开版本）

这个呼吸灯是在蜂鸣器那块的，我估计是重载值什么的写错了，闪的速度有点过快，但是理论上应该没问题其实回过头看看，这玩意和后面那个串口与1602实例相比，可以说是不值一提了

代码如下
#include<reg52.h>
sbit PWMOUT=P1^3;
sbit ADDR0=P2^0;
sbit ADDR1=P2^1;
sbit ADDR2=P2^2;
sbit ENLED=P1^1;
unsigned long PeriodCnt=0;
unsigned char HighRH=0;
unsigned char HighRL=0;
unsigned char LowRH=0;
unsigned char LowRL=0;
unsigned char T1RH=0;
unsigned char T1RL=0;
void ConfigTimer1(unsigned int ms);
void ConfigPWM(unsigned int fr,unsigned char dc);
void main()
{
EA=1;
ADDR0=1;
ADDR1=1;
ADDR2=1;
ENLED=0;
ConfigPWM(100,10);
ConfigTimer1(50);
while(1);
}
void ConfigTimer1(unsigned int ms)
{
unsigned long tmp;
tmp=32768000/12;
tmp=(tmp*ms)/1000;
tmp=65536-tmp;
tmp=tmp+12;
T1RH=(unsigned char)(tmp>>8);
T1RL=(unsigned char)tmp;
TMOD&=0x0F;
TMOD|=0x10;
TH1=T1RH;
TL1=T1RL;
ET1=1;
TR1=1;
}
void ConfigPWM(unsigned int fr,unsigned char dc)
{
unsigned int high,low;
PeriodCnt=(32768000/12)/fr;
high=(PeriodCnt*dc)/100;
low=PeriodCnt-high;
high=65536-high+12;
low=65536-low+12;
HighRH=(unsigned char)(high>>8);
HighRL=(unsigned char)high;
LowRH=(unsigned char)(low>>8);
LowRL=(unsigned char)low;
TMOD&=0xF0;
TMOD|=0x01;
TH0=HighRH;
TL0=HighRL;
ET0=1;
TR0=1;
PWMOUT=1;
}
void AdjustDutyCycle(unsigned char dc)
{
unsigned int high,low;
high=(PeriodCnt*dc)/100;
low=PeriodCnt-high;
high=65536-high+12;
low=65536-low+12;
HighRH=(unsigned char)(high>>8);
HighRL=(unsigned char)high;
LowRH=(unsigned char)(low>>8);
LowRL=(unsigned char)low;
}
void InterruptTimer0() interrupt 1
{
if(PWMOUT==1)
{
TH0=LowRH;
TL0=LowRL;
PWMOUT=0;
}
else
{
TH0=HighRH;
TL0=HighRL;
PWMOUT=1;
}
}
void InterruptTimer() interrupt 3
{
static bit dir=0;
static unsigned char index=0;
unsigned char code table[13]={
5,18,30,41,51,60,68,75,81,86,90,93,95
};
TH1=T1RH;
TL1=T1RL;
AdjustDutyCycle(table[index]);
if (dir==0)
{
index++;
if(index>=12)
{
dir=1;
}
}
else
{
index--;
if(index==0)
{
dir=0;
}
}
}