程序部分
$ ^( w0 U# |6 v8 d4 f+ I! v; W* E#include <reg51.h>; s" Z0 d) a `. `& V
void delay (unsigned int i)
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7 M1 J6 K% t& r! hunsigned int k;2 W8 h5 \% G! ]& B* B+ B# w) n
for (k=0;k<i;k++);
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8 h p5 n0 A" e, j* E9 ~' Lvoid main()
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unsigned char aa,i;( n! X& h; R9 j3 r- j4 Y y" V
while(1)% c0 I8 Z1 {5 g* i" f2 Z' ?# v' Z6 k
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aa=0x80;
1 i$ Z' o, \1 Q3 @for(i=0;i<8;i++)
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P1=aa;& Q( I( r: a' R: z
delay(25000);6 j9 P& [7 \7 E& N# Z3 ~3 D+ A6 d
aa>>=1;//左移
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}
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发表于 2017-10-15 21:28:18
