paomadeng.c

通过4位开关输入控制信号

#include <c8051f040.h>

unsigned char LED;

void config(void){
	WDTCN=0XDE;
	WDTCN=0XAD;
	SFRPAGE=0X0F;
	XBR0=0X00;
	XBR1=0X00;
	XBR2=0X40;
	XBR3=0X00;
	P5MDOUT=0XFF;
}

void delay(unsigned int x){
	unsigned int i;
	for(i=0;i<x;i++)
		{;}
}

void MoveLeft(unsigned char *x){
	if((*x&0x80)==0)
		*x<<=1;
		else{
			*x<<=1;
			*x|=0x01;
		}
}

void MoveRight(unsigned char * x){
	if((*x&0x01)==0)
		*x>>=1;
		else{
			*x>>=1;
			*x|=0x80;
		}
}

main(){
	unsigned char Mode,Dir,Speed_2,Speed_3,Speed_4;
	config();
	LED=0x3;
	while(1){
		Mode=P7;
		Dir=Mode&0x01;
		Speed_2=Mode&0x02;
		Speed_3=Mode&0x04;
		Speed_4=Mode&0x08;
		if(Dir==0){
			if(Speed_2==0){
				P5=LED;
				delay(40000);
				MoveLeft(&LED);	
				P5=LED;
				continue;
			}
			if(Speed_3==0){
				P5=LED;
				delay(20000);
				MoveLeft(&LED);
				P5=LED;
				continue;
			}
			if(Speed_4==0){
				P5=LED;
				delay(10000);
				MoveLeft(&LED);
				P5=LED;
				continue;
			}
		}
		else{
			if(Speed_2==0){
				P5=LED;
				delay(40000);
				MoveRight(&LED);	
				P5=LED;
				continue;
			}
			if(Speed_3==0){
				P5=LED;
				delay(20000);
				MoveRight(&LED);
				P5=LED;
				continue;
			}
			if(Speed_4==0){
				P5=LED;
				delay(10000);
				MoveRight(&LED);
				P5=LED;
				continue;
			}	
		}
	}
}