Proteus仿真74LS138译码器应用+代码+DSN

/*************** 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() { P2 = 0x00; while(1) { P2 = (P2+1)%8; Delay(50); } }