hongwai.c

此程序主要是通过红外检测物体是否落下

#include "89c2051.h"
#define NOKEY        1
#define KEY_BACK	 2
#define KEY_FORWARD  3
bit autostate = 0;
unsigned char switchl = 0;
unsigned char workstate = 0;
unsigned char timerdelay = 0;
unsigned int timertime = 0;
unsigned int timertime1 = 0;
void delay(unsigned int temp)
{
	unsigned char i;
	unsigned int j;
	for(j=0;j<temp;j++)
	{
		for(i=0;i<255;i++);
	}
}
void chip_init(void)
{
	P3M1 = 0x80;
	TMOD = 0x01;
	AUXR = 0x00;
	TH0  = 0xff;
	TL0  = 0xf5;/////9c
	IE   = 0x82;
	TR0  = 1;
	SH00T = 0;
	SWITCH = 1;
	BACK = 1;
	RECEIVE = 1;
	FORWARD = 1;
	P_UNLOAD = 0;
	P_LOAD  = 0;
}
unsigned char key(void)
{
	if(SWITCH!=switchl)
	{
		delay(10);
		if(SWITCH!=switchl)
		{
			switchl = SWITCH;
			if(SWITCH==0)
			{
				workstate = 0;
			}
			else
			{
				workstate = 1;
			}
		}
	 }
	 if(!FORWARD)
	 {
	 	delay(10);
		if(!FORWARD)
		{
			return(KEY_FORWARD);
		}
		else
		{		
			return(NOKEY);	
		}
	 }
	 if(!BACK)
	 {
		delay(10);
		if(!BACK)
		{
			return(KEY_BACK);
		}
		else
		{
			return(NOKEY);
		}
	}
}
void timer0_inter(void) interrupt TF0_VECTOR
{
	TH0  = 0xff;
	TL0  = 0xf5;////9c
	SH00T = ~SH00T;
	if(timerdelay<200)
	{
		timerdelay++;
	}
}
void timer_delay(void)
{
	if(timerdelay>=180)
	{
		timertime++;
		timertime1++;
		timerdelay = 0;
	
	}
}
void main(void)
{
	unsigned char keytemp;
	chip_init();
	while(1)
	{
		timer_delay();
		keytemp = key();
		if(workstate)
		{
			LED_A = 0;
			LED_H = 1;
			if(RECEIVE)
			{
				if(timertime1>600)
				{
					P_UNLOAD = 0;
					P_LOAD   = 1;
					autostate =1;
				}
				timertime = 0;
			}
			else
			{
				if(autostate)
				{
					if(timertime>=200)
					{
						P_UNLOAD = 0;
						P_LOAD   = 0;
						autostate = 0;
					}
				}
				else
				{
					P_UNLOAD = 0;
					P_LOAD   = 0;	
				}
				timertime1 = 0;
			}
		}
		else
		{
			LED_A = 1;
			LED_H = 0;
			if(keytemp == KEY_BACK)
			{
				P_UNLOAD = 1;
				P_LOAD   = 0;
			}
			else if(keytemp == KEY_FORWARD)
			{
				P_UNLOAD = 0;
				P_LOAD   = 1;
			}
			else
			{
				P_UNLOAD = 0;
				P_LOAD   = 0;
			}
		} 
	}
}