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#include <reg51.h> #include <math.h> #define uchar unsigned char #define uint unsigned int #define PI 3.1415925 float alph; void delayms(uint x) { uchar i; while(x--); { for(i=0;i<123;i++); } } main() { uchar i; while(1) { for(alph=0;alph<2*PI;alph+=0.1) { P2=127+127*sin(alph); delayms(1); } } }
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