- /*
- STC15F104E 呼吸灯
- 时钟频率5.004MHz
- 灯在P3.2引脚
- By:Ansifa 2012-1-25
- */
- #include <REG51.h>
- sbit Pin = P3 ^ 3;
- void Delay(unsigned int a)
- {
- while( a-- != 0)
- {
- }
- }
- void Delay2(unsigned long a)
- {
- while( a-- != 0)
- {
- }
- }
- main()
- {
- int i, delaytime;
- bit mark = 0;
- int bright = 0;
- while(1)
- {
- if(bright == 0) Delay2(50000);
- if(bright == 255 || bright == 0) mark = !mark;
- if(mark == 1)
- {
- bright++;
- delaytime = 9;
- }
- else
- {
- bright--;
- delaytime = 4;
- }
- for(i = 0; i < 255; i++)
- {
- if(i < bright)
- {
- Pin = 0;
- Delay(delaytime);
- }
- else
- {
- Pin = 1;
- Delay(delaytime);
- }
- }
- }
- }
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