51單片機防盜報警，按鍵可觸發報警
單片機源程序如下:
- #include <REGX52.H>
- #include <INTRINS.H>//
- sbit feeq=P2^3;//看看原理圖是哪個管腳
- int i;
- void Delay(unsigned int xms) //可以給參數的延時函數給幾就是幾毫秒
- { unsigned char data i, j;
- while(xms)
- {
- i = 2;
- j = 239;
- do
- {
- while (--j);
- } while (--i);
- xms--;
- }
- }
- void main()
- {
- if(P3_1==0 || P3_0==0) //如果S2按鍵或S3按鍵按下
- { for(i=0;i<10;i++)
- {
- P1=0xF0;//1111 0000
- Delay(80);
- P1=0xFF;//1111 1111
- Delay(80);
- feeq=0;//停
- Delay(80);
- feeq=1;
- Delay(80);//響
- }
- }
- }
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