interrupt.c

单片机的下位端

#include <sys.h>

extern UCHAR command;
extern bit receiveFlag;
extern bit sendFlag;
extern bit timerFlag;
extern data UCHAR *p;
typedef struct
{	signed int d[30];
	UINT front,rear;
}ASEQ;
extern ASEQ sq;

void int0() interrupt 0
{
    //todo
} 

void timer0() interrupt 1
{
	TH0 = TIMER0/256;
    TL0 = TIMER0%256;
	sq.d[sq.front] = AD7895();
	if((sq.d[sq.front]&0x0800) == 0x0800)               //negitive
		sq.d[sq.front] |= 0xf000;
	sq.front++;
	if(sq.front >= 30)
	{
		timerFlag = 1;
    	TR0 = 1;
		sq.front=0;
	}
}

void int1() interrupt 2
{
    //todo 
}

void timer1() interrupt 3
{
    //todo
}

void serial() interrupt 4
{
	static UCHAR temp = 0;
	if(RI)                   //the receive process 
	{
		RI = 0;
		if(RB8)              //receive the address
		{
			temp = SBUF;
			if(temp == LOCALCELL || temp == COMMON)
				SM2 = 0;
		}
		else                 //receive the command
		{
			temp = SBUF;
			receiveFlag = 1;
    		SM2 = 1;
			switch(temp)
			{
				case QUERY:    command = 1; break;
				case GATHER:   command = 2; break;
				case TRANSFER: command = 3; break;
				default:       command = 0;
			}
			TEST_START = 1;
		}
		temp = 0;
	}
	else if(TI && (temp!=6))
	{
	    TB8 = 0;         //sign data flag 
	    TI = 0;
        temp++;
		SBUF = *p++;
	}
	else if(TI)
	{
		TI = 0;
		temp = 0;
		sendFlag = 1;
	}
}