system.c

本人开发的测量水的浊度的仪器

#include "system.h"

static data volatile uchar key=KEY_NONE;
static data volatile uchar pressed=0;
static data uchar timer;

uchar gettimer()
{
	return timer;
}

void cleartimer()
{
	timer = 0;
}

uchar readkey()
{
	uchar tmpkey=KEY_NONE;

	ET0 = 0;

	if(pressed)
	{
		pressed = 0;
		tmpkey = key;
		key = KEY_NONE;
	}
	
	ET0 = 1;
	return tmpkey;
}

void intx0() interrupt 0 {}
void intx1() interrupt 2 {}
void intt1() interrupt 3 {}
void ints() interrupt 4 {}

void intt0() interrupt 1
{
	unsigned char i,tmpkey;

	TH0 = 55535/256;
	TL0 = 55535%256;

	timer++;

	if(pressed) return;

	P0 = 0x1f;
	tmpkey = P0 & 0x1f;

	if(tmpkey == 0x1f && key != KEY_NONE)
	{
		pressed = 1;
		return;
	}
/**/
	key = KEY_NONE;
	for(i=0;i<5;i++)
	{
		if(!(tmpkey&0x01))
		{
			key = i+1;
			break;
		}
		tmpkey >>= 1;
	}
}
/*
void printtime()
{
	uchar buf[20];
	uchar second,minute,hour,date,month,year;

	if(gettimer() > 50)
	{
		cleartimer();

		second 	= readsecond();
		minute 	= readminute();
		hour 	= readhour();
		date 	= readdate();
		month 	= readmonth();
		year 	= readyear();
		sprintf(buf,"20%02bx/%02bx/%02bx %02bx:%02bx:%02bx",year,month,date,hour,minute,second);
		printstring8 (0,0,27,buf);//
	}
}
*/
void printtime()
{
	uchar buf[20];
	uchar second,minute,hour,date,month,year;

	if(gettimer() > 50)
	{
		cleartimer();

		second 	= readsecond();
		minute 	= readminute();
		hour 	= readhour();
		date 	= readdate();
		month 	= readmonth();
		year 	= readyear();
		sprintf(buf,"20%02bx-%02bx-%02bx",year,month,date);
		printstring16(0,0,26,buf);//
		sprintf(buf,"%02bx:%02bx:%02bx",hour,minute,second);
		printstring16(0,2,28,buf);//
	}
}