基于51单片机的火灾报警系统程序与电路原理图 -

#include <STC12C5A60S2.H>
#include "oled.h"
#include "adc.h"
#include "temp.h"
#include "key.h"
#define u8 unsigned char
#define u32 unsigned int
sbit Temp_LED = P3^5;
sbit Solu_LED = P3^6;
sbit Beep = P3^2;
u8 layout_static = 1;
u32 Temp_max = 200;
u32 Temp_min = 150;
u32 Solu_max = 60;
u32 Solu_min = 40;
int system_temp;
void DisplayTemp(u32 Temp)
{
OLED_ShowNum(48,2,Temp/10,2,16);
OLED_ShowNum(72,2,Temp%10,1,16);
}
void DisplayMQ2(u32 MQ2Val)
{
OLED_ShowNum(48,4,MQ2Val/10,2,16);
OLED_ShowNum(72,4,MQ2Val%10,1,16);
}
void LcdDisplay(int temp) //lcd显示
{
float tp;
if(temp< 0) //当温度值为负数
{
//因为读取的温度是实际温度的补码，所以减1，再取反求出原码
temp=temp-1;
temp=~temp;
tp=temp;
temp=tp*0.0625*100+0.5;
//留两个小数点就*100，+0.5是四舍五入，因为C语言浮点数转换为整型的时候把小数点
//后面的数自动去掉，不管是否大于0.5，而+0.5之后大于0.5的就是进1了，小于0.5的就
//算由?.5，还是在小数点后面。
}
else
{
tp=temp;//因为数据处理有小数点所以将温度赋给一个浮点型变量
//如果温度是正的那么，那么正数的原码就是补码它本身
temp=tp*0.0625*100+0.5;
//留两个小数点就*100，+0.5是四舍五入，因为C语言浮点数转换为整型的时候把小数点
//后面的数自动去掉，不管是否大于0.5，而+0.5之后大于0.5的就是进1了，小于0.5的就
//算加上0.5，还是在小数点后面。
}
system_temp = temp/10;
}
void OLED_MyInit()
{
OLED_Init(); //初始化OLED
OLED_Clear();
OLED_ShowCHinese(0,0,0);//超
OLED_ShowCHinese(18,0,1);//可
OLED_ShowCHinese(36,0,2);//爱
OLED_ShowCHinese(54,0,3);//的
OLED_ShowCHinese(72,0,4);//沈
OLED_ShowCHinese(90,0,5);//萌
OLED_ShowCHinese(108,0,6);//萌
OLED_ShowString(0,2,"Temp:",16);
OLED_ShowNum(48,2,00,2,16);//21
OLED_ShowString(64,2,".",16);
OLED_ShowNum(72,2,0,1,16);//21
OLED_ShowString(0,4,"Solu:",16);
OLED_ShowNum(48,4,0,2,16);//21
OLED_ShowString(64,4,".",16);
OLED_ShowNum(72,4,0,1,16);//21
OLED_ShowString(84,4,"%",16);
OLED_ShowString(0,6,"KEY1:System Set",16);
}
void layout_switch(u8 layout_static,u8 clear_static)
{
if(clear_static==1)OLED_Clear();
switch(layout_static)
{
case 1:
OLED_ShowCHinese(0,0,0);//超
OLED_ShowCHinese(18,0,1);//可
OLED_ShowCHinese(36,0,2);//爱
OLED_ShowCHinese(54,0,3);//的
OLED_ShowCHinese(72,0,4);//沈
OLED_ShowCHinese(90,0,5);//萌
OLED_ShowCHinese(108,0,6);//萌
OLED_ShowString(0,2,"Temp:",16);
OLED_ShowNum(48,2,21,2,16);//21
OLED_ShowString(64,2,".",16);
OLED_ShowNum(72,2,0,1,16);//21
OLED_ShowString(0,4,"Solu:",16);
OLED_ShowNum(48,4,0,2,16);//21
OLED_ShowString(64,4,".",16);
OLED_ShowNum(72,4,0,1,16);//21
OLED_ShowString(84,4,"%",16);
OLED_ShowString(0,6,"KEY1:System Set",16);
break;
case 2:
OLED_ShowCHinese(0,0,0);//超
OLED_ShowCHinese(18,0,1);//可
OLED_ShowCHinese(36,0,2);//爱
OLED_ShowCHinese(54,0,3);//的
OLED_ShowCHinese(72,0,4);//沈
OLED_ShowCHinese(90,0,5);//萌
OLED_ShowCHinese(108,0,6);//萌
OLED_ShowString(0,4,"Temp max set",16);
OLED_ShowString(0,6," Max:",16);
OLED_ShowNum(48,6,Temp_max/10,2,16);//21
OLED_ShowString(64,6,".",16);
OLED_ShowNum(72,6,Temp_max%10,1,16);//21
break;
case 3:
OLED_ShowCHinese(0,0,0);//超
OLED_ShowCHinese(18,0,1);//可
OLED_ShowCHinese(36,0,2);//爱
OLED_ShowCHinese(54,0,3);//的
OLED_ShowCHinese(72,0,4);//沈
OLED_ShowCHinese(90,0,5);//萌
OLED_ShowCHinese(108,0,6);//萌
OLED_ShowString(0,4,"Temp min set",16);
OLED_ShowString(0,6," Min:",16);
OLED_ShowNum(48,6,Temp_min/10,2,16);//21
OLED_ShowString(64,6,".",16);
OLED_ShowNum(72,6,Temp_min%10,1,16);//21
break;
case 4:
OLED_ShowCHinese(0,0,0);//超
OLED_ShowCHinese(18,0,1);//可
OLED_ShowCHinese(36,0,2);//爱
OLED_ShowCHinese(54,0,3);//的
OLED_ShowCHinese(72,0,4);//沈
OLED_ShowCHinese(90,0,5);//萌
OLED_ShowCHinese(108,0,6);//萌
OLED_ShowString(0,4,"Solu max set",16);
OLED_ShowString(0,6," Max:",16);
OLED_ShowNum(48,6,Solu_max/10,2,16);//21
OLED_ShowString(64,6,".",16);
OLED_ShowNum(72,6,Solu_max%10,1,16);//21
OLED_ShowString(84,6,"%",16);
break;
case 5:
OLED_ShowCHinese(0,0,0);//超
OLED_ShowCHinese(18,0,1);//可
OLED_ShowCHinese(36,0,2);//爱
OLED_ShowCHinese(54,0,3);//的
OLED_ShowCHinese(72,0,4);//沈
OLED_ShowCHinese(90,0,5);//萌
OLED_ShowCHinese(108,0,6);//萌
OLED_ShowString(0,4,"Solu min set",16);
OLED_ShowString(0,6," Min:",16);
OLED_ShowNum(48,6,Solu_min/10,2,16);//21
OLED_ShowString(64,6,".",16);
OLED_ShowNum(72,6,Solu_min%10,1,16);//21
OLED_ShowString(84,6,"%",16);
break;
default:
break;
}
}
int main(void)
{
u32 MQ2Val;
InitADC(); //初始化ADC
OLED_MyInit();
while(1)
{
MQ2Val = GetADCResult(0)*100;
MQ2Val = MQ2Val/255;
MQ2Val = MQ2Val * 10;
if(MQ2Val==1000)MQ2Val=990;
LcdDisplay(Ds18b20ReadTemp());
if((system_temp<Temp_min)||(system_temp>Temp_max))
{
Temp_LED = 0;//报警
Beep = 0;
}else
{
Temp_LED = 1;//不报警
}
if((MQ2Val<Solu_min)||(MQ2Val>Solu_max))
{
Solu_LED = 0;//报警
Beep = 0;
}else
{
Solu_LED = 1;//不报警
}
//如果报警灯都没亮。
if((Solu_LED == 1)&&(Temp_LED == 1))
{
Beep = 1;
}
if(layout_static == 1)
{
DisplayMQ2(MQ2Val);
DisplayTemp(system_temp);
}
switch(KeyScan())
{
case 1://Set
layout_static++;//视图切换
if(layout_static == 6)
{
layout_static = 1;
}
layout_switch(layout_static,1);
break;
case 2://up
if(layout_static == 2)
{
if(Temp_max!=990)//不超过99℃
Temp_max=Temp_max+10;
}else if(layout_static == 3)
{
if(Temp_min<Temp_max-10)//不超过最大值减1，保持区间
Temp_min=Temp_min+10;
}else if(layout_static == 4)
{
if(Solu_max!=990)//不超过99℃
Solu_max=Solu_max+10;
}else if(layout_static == 5)
{
if(Solu_min<Solu_max-10)//不超过最大值减1，保持区间
Solu_min=Solu_min+10;
}
layout_switch(layout_static,0);
break;
case 3://down
if(layout_static == 2)
{
if(Temp_max>Temp_min+10)
Temp_max=Temp_max-10;
}else if(layout_static == 3)
{
if(Temp_min!=10)
Temp_min=Temp_min-10;
}else if(layout_static == 4)
{
if(Solu_max>Solu_min+10)
Solu_max=Solu_max-10;
}else if(layout_static == 5)
{
if(Solu_min!=10)
Solu_min=Solu_min-10;
}
layout_switch(layout_static,0);
break;
default:
break;
}
}
}

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