摘要：
1 #include 2 3 void delay(unsigned int i); 4 void SHR(unsigned char beginchar,unsigned char count,unsigned char stepcount,bit opretor,unsigned int delaytime); 5 6 void main() 7 { 8 unsigned int i; 9 P2=0xff;10 11 while(1)12 { 13 for(i=0;i0;i--)28 ... 阅读全文