50 74HC154译码器应用.rar

/*************** writer:shopping.w ******************/ #include <reg52.h> #define uint unsigned int #define uchar unsigned char void Delay(uint x) { uchar i; while(x--) { for(i=0;i<120;i++); } } void main() { while(1) { P2 = (P2+1)%16; Delay(50); } }