#include<at89x51.h>
void main()
{
float i;
while(1)
{
P1_0=!P1_0;
P1_1=!P1_1;
P1_2=!P1_2;
P1_3=!P1_3;
P1_4=!P1_4;
P1_5=!P1_5;
P1_6=!P1_6;
P1_7=!P1_7;
for(i=0;i<1000;i++);
}
}
void main()
{
float i;
while(1)
{
P1_0=!P1_0;
P1_1=!P1_1;
P1_2=!P1_2;
P1_3=!P1_3;
P1_4=!P1_4;
P1_5=!P1_5;
P1_6=!P1_6;
P1_7=!P1_7;
for(i=0;i<1000;i++);
}
}
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