没有传感器，用手动的调节代替~
仿真原理图如下（proteus仿真工程文件可到本帖附件中下载）：
单片机源程序如下:
- #include<reg51.h>
- char code TAB[10]={ 0xc0,0xf9,0xa4,0xb0,0x99,
- 0x92,0x83,0xf8,0x80,0x98};
- #define ADC P0
- #define SCANP P1
- #define SEG7P P2
- sbit relay=P3^0;
- sbit LED=P3^1;
- unsigned char disp[4]={0,0,0,0};
- unsigned char _adc;
- void dataproc(unsigned int);
- void display(void);
- void delay1ms(char);
-
- main()
- {
- while(1)
- {
-
- _adc=ADC;
- dataproc(_adc);
- display();
- LED=0;
- if(disp[3]>=3)
- {
- relay=0;
- delay1ms(100);
- relay=1;
- delay1ms(100);
- }
-
- }
- }
- void dataproc(unsigned int data_in)
- {
- int results;
- results=data_in*196;
- disp[3]=results/10000;
- disp[2]=(results/1000)%10;
- disp[1]=(results/100)%10;
- disp[0]=(results/10)%10;
- }
- void display(void)
- {
- char i,scan;
- char times=20;
- while(--times>=0)
- {
- scan=1;
- for(i=0;i<4;i++)
- {
- SEG7P=0xff;
- SCANP=scan;
- SEG7P=TAB[disp[i]];
- delay1ms(4);
- scan<<=1;
- }
- }
- }
-
- ……………………
- …………限于本文篇幅 余下代码请从51黑下载附件…………
所有资料51hei提供下载:
烟雾报警.zip
(74.45 KB, 下载次数: 33)
|
