#include "reg51.h"
#include "absacc.h"
#include "intrins.h"
#include "math.h"
#include "string.h"
#define uint unsigned int
#define uchar unsigned char
#define menxian 3.2
#define menxian2 4.5
uchar ZKB1 = 0;
uchar click;
uchar controlflag = 0;
uchar k;
uchar n=5;
uchar shezhi=0;
uchar flagAD=0;
uchar flagSY=0;
uint count=0;
uint Num;
sbit Tlc549_Clk = P1^0 ;
sbit Tlc549_Data = P1^1;
sbit Tlc549_Cs = P1^2;
sbit LED = P2^0;
sbit kz= P3^2;
sbit pwm= P2^1;
uchar Tlc549(void) //AD549采集电压
{
uchar i;
uint TT=0;
Tlc549_Cs =0;
for(i=0;i<8;i++) //这儿多个{
{
Tlc549_Clk =1;
TT=TT<<1;
if(Tlc549_Data==1)
TT=TT+1;
Tlc549_Clk =0;
}
Tlc549_Cs =1;
Num = TT;
return Num;
}
float AD_turn(uchar i)
{
float ff;
ff=5.0/255*i;
return ff;
}
//这儿多个}
void Timer_init(void)
{
TMOD=0x01;
TH0=0xFF;
TL0=0x06; //赋初值
EA=1;
ET0=1;
EX0=1;
IT0=1;
LED=0;
}
void main()
{
float bian;
Timer_init();
while(1)
{
k=Tlc549(); //读取AD采集的光照传感器的数值
bian=AD_turn(k); //读取AD采集的光照传感器的数值转换成电压
if(bian>menxian) //电压值高于门限
{
flagAD=1;//光照低于一定的值，黑天
}
else
{
flagAD=0;//白天
}
if(flagAD&&flagSY)//黑天且有声音
{
TH0=0xFF;
TL0=0x06;
TR0=1;
LED=1;//打开LED灯
count=0;
flagSY=0;
EX0 = 0;
controlflag = 1;
}
if(bian>menxian2) //pwm ////////////////////////////////
{
ZKB1 = 50;
}
else
{
ZKB1 =140-bian*20;//255档归为100级，及占空比100%可调
}
}
}
void Timer_inter(void) interrupt 1
{
count++;
if (controlflag == 1)
{
if(count>60000)
{
count=0;
LED=0;
EX0 = 1;
controlflag = 0;
}
}
TH0=0xFF;
TL0=0x06; //定时250us
TR0=1;
++click;
if (click>100) click=0; //靠这个定时计数来实现PWM控制周期
if (click { pwm=0; } else { pwm=1; } } //////////////////////////////////////////////////////////////////////// void Extra_inter(void) interrupt 0 { if (kz == 1) { flagSY=1; } else { flagSY=0; } }
