untitled.c

报警器同步控制模块

#include <pic.h> 
unsigned int sync;
const timing[4]={0x16,0x14,0x17,0x11};
bit down,startplus,syncplus;
union
{
	struct
	{	
		unsigned b0:1;
		unsigned b1:1;
		unsigned b2:1;
		unsigned b3:1;	
		unsigned b4:1;
		unsigned b5:1;
		unsigned b6:1;
		unsigned b7:1;
	}bits;
	unsigned char word;
}signal,count;

void scankey(void);
void interrupt ISR(void)
{
	//RD0=!RD0;
	if(T0IE & T0IF)
	{
		//RBIF=0;
		INTF=0;		
		T0IF=0;
		RC3=!RC3;
//		RBIE=0;
		INTE=0;
		T0IF=0;
		T0IF=0;
		TMR0=0x86;
		RC4=1;
		if(!syncplus){++sync;RC1=0;if(sync>12){syncplus=1;sync=0;RC1=1;}}		
		if(syncplus && (!startplus)){++sync;}		
		if(sync>500){startplus=1;sync=0;RC1=0;}//sync>976
		if(startplus)
		{		
		if(count.bits.b1){RC0=signal.bits.b4;}		
		if(count.bits.b2){RC0=signal.bits.b3;}
		if(count.bits.b3){RC0=signal.bits.b2;}
		if(count.bits.b4){RC0=signal.bits.b1;}
		if(count.bits.b5){RC0=signal.bits.b0;}
		if(count.bits.b6){RC0=1;}
		if(count.bits.b7)
			{count.word=1;syncplus=0;startplus=0;sync=0;RC1=1;RC0=1;}
		count.word<<=1;	
		if(!T0IE){count.word=1;}
		}
		RC4=0;
	}
}
void main(void)
{
	//
	down=0;
	syncplus=0;
	startplus=0;	
	TRISC=0;
	PORTC=0;

	RAPU=0;
	INTCON=0;
	WPUA=0X37;	
	PORTA=0;
	CMCON=0X07;
	ANSEL=0;
	TRISA=0xff;	
	PORTA=0XFF;
	
	T0IF=0;
	T0IE=0;	
	OPTION=0x02;
	TMR0=0x86;
	count.word=0x01;
	
	GIE=1;
	while(1)
	{
		scankey();
		RC5=down;	
	}
}
void scankey(void)
{
	static bit other1,other2,other3,other4;
	if(!down)
	{
	down=1;	
	other1=RA1 & RA2 & RA4;
	other2=RA0 & RA4 & RA2;
	other3=RA0 & RA1 & RA4;
	other4=RA0 & RA1 & RA2;
	if((!RA0)&&(other1)){signal.word=0x16;T0IF=0;T0IE=1;}
	if((!RA1)&&(other2)){signal.word=0x14;T0IF=0;T0IE=1;}
	if((!RA2)&&(other3)){signal.word=0x17;T0IF=0;T0IE=1;}
	if((!RA4)&&(other4)){signal.word=0x11;T0IF=0;T0IE=1;}
			RC0=1;			
			count.word=0x01;		
	}	
	if(RA0 & RA1 & RA2 & RA4)
	{
		signal.word=0;
		down=0;count.word=0x01;
		sync=0;syncplus=0;startplus=0;
		T0IF=0;
		T0IE=0;
		RC1=1;
	}			
}