多种方式控制流水灯.doc

/1/位运算来控制流水灯 /* #include void delay(void) unsigned char i,j; for(i=0;i250;i+) for(j=0;j250;j+) ; void main(void) int i; while(1) P3=0xff; delay(); for(i=0;i8;i+) P3=P31; delay(); */ /2/ 用指针做函数参数来控制流水灯 #include void delay(void) unsigned int i; for(i=0;i20000;i+) /for(j=0;j200;j+) ; void liushui(unsigned char *p) unsigned char i; while(1) for(i=0;i8;i+) P3=*(p+i); delay(); void main(void) unsigned char code Tab=0xFE,0xFD,0xFB,0xF7,0xEF,0xDF,0xBF,0x7F; unsigned char *pointer; pointer=Tab; liushui(pointer); /3/用左移函数（_crol_()）来控制流水灯： /* #include #include sbit led=P30; void delay(void) unsigned char i,j; for(i=0;i200;i+) for(j=0;j200;j+) ; void main(void) P3=0xfe; delay(); while(1) P3=_crol_(P3,1);delay(); */4/运用条件编译控制流水灯/*#include#include #define MAX 100 void delay(void) unsigned char i,j; for(i=0;i200;i+) for(j=0;j80 P3=0xfe; while(1) P3=_crol_(P3,1);delay(); #else P3=0xf0; delay(); P3=0x0f; delay(); #endif */ /5/文件包含控制流水灯/* #include void delay(void) unsigned char i,j; for(i=0;i200;i+) for(j=0;j200;j+) ; void main(void) while(1) P3_0=0; delay(); P3_0=1; delay(); P3_1=0; delay(); P3_1=1; delay(); P3_2=0; delay(); P3_2=1; delay(); P3_3=0; delay(); P3_3=1; delay(); P3_4=0; delay(); P3_4=1; delay(); P3_5=0; delay(); P3_5=1; delay(); P3_6=0; delay(); P3_6=1; delay(); P3_7=0; delay(); P3_7=1; delay(); */ /6.用定时器T0查询方式控制p3口8位流水灯 /* #include #include void delay(void) unsigned char i,j; for(i=0;i200;i+) for(j=0;j200;j+) ; void main(void) int i=0; P3=0xfe; TMOD=0x01; TH0=(65336-46083)/256; TL0=(65336-46083)%256; TR0=1; while(1) while(TF0=0) ; TF0=0; P3=_crol_(P3,1);delay();i+; TH0=(65336-46083)/256; TL0=(65336-46083)%256;if(i=8)P3=0xfe; */7.用计数器查询方式，高四位以0.1s周期闪烁，地四位以0.5s周期闪烁/* #include sbit led1=P30; sbit led2=P31; sbit led3=P32; sbit led4=P33; sbit led5=P34; sbit led6=P35; sbit led7=P36; sbit led8=P37; void main(void) int i=0,j=0; TMOD=0X01; TH0=(65536-50000)/256; TL0=(65536-50000)%256; TR0=1; led1=led2=led3=led4=1; led5=led6=led7=led8=1; while(1) while(TF0=0) ; i+; j+; TF0=0; if(i=1) led1=led1; led2=led2; led3=led3; led4=led4; i=0; TH0=(65536-50000)/256; TL0=(65536-50000)%