P0口和P2口组成的16位流水灯
#include<stc90.h>void delay(unsigned int s){
while(s--);
}
void P0_LED(void){
unsigned char a;
unsigned char i;
a=0xFE;
i=8;
while(i--){
P0=a;
delay(6000);
a=a << 1;
a=a|0x01;
if(a==0xFF) a=0xFE;
if(i==0) P0=0xFF;
}
}
void P2_LED(void){
unsigned char a;
unsigned char i;
a=0xFE;
i=8;
while(i--){
P2=a;
delay(6000);
a=a << 1;
a=a|0x01;
if(a==0xFF) a=0xFE;
if(i==0) P2=0xFF;
}
}
void main(void){
while(1){
P0_LED();
P2_LED();
}
}
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