15.1 LED呼吸灯

#include REGX52.Hsbit LEDP2^0;void Delay(unsigned int t){while(t--);}void main(){unsigned char Time,i;while(1){for(Time0;Time100;Time) //改变亮灭时间由暗到亮{for(i0;i20;i) //计次延时{LED0; //LED亮Delay(Time); //延时TimeLED1; //LED灭Delay(100-Time); //延时100-Time}}for(Time100;Time0;Time--) //改变亮灭时间由亮到暗{for(i0;i20;i) //计次延时{LED0; //LED亮Delay(Time); //延时TimeLED1; //LED灭Delay(100-Time); //延时100-Time}}}}