点亮发光二极管的两种程序:
+ C8 j% N# q* _7 A#include<reg52.h>7 G5 e4 L, y6 M. J8 b
sbit led=P0^0;9 N. y" }# u3 b# Z4 W
void Delay()) w9 V5 Z3 h4 b c: U/ }
{
: y, ?3 z: G/ R1 b/ runsigned char i,j;6 p+ q; X3 q/ j: y" B
for(i=0; i<255 ;i++;)
: P7 [: e+ z# Y! e for(j=0; j<255 ;j++;)( w9 ^, B) B: ~" P9 b* d/ O2 I
}
1 B9 M% I9 s# qvoid main()
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while(1)
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led=0;$ s( @! O9 r+ B3 D2 s
Delay();0 \% U/ B* @; E
led=1;
# W4 k' O7 _% j% h0 M9 cDelay();; ]3 U4 r; k6 P/ ^
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} |