main.c

胶印机印刷控制程序

#include <reg51.h>

#define STEP_COU	133

sbit CON_DIR	=	P1^5;
sbit CON_PUL	=	P1^6;
#define DIR_FOR		0
#define DIR_BACK	1

sbit B_F	=	P3^3;
sbit B_B	=	P3^4;
sbit B_STEP	=	P3^5;
sbit PLC_FOR	=	P1^4;
sbit PLC_BACK	=	P1^3;
sbit PLC_STEP	=	P1^2;

sbit WDI	=	P3^0;

unsigned char workMod;

#define MSG_NONE	0
#define MSG_FOR		1
#define MSG_BACK	2
#define MSG_STEP	3

#define WORK_NONE	0
#define WORK_FOR	1
#define WORK_BACK	2
#define WORK_STEP	3

void StepOne();

bit testFor()
{
	unsigned char i;

	for(i=0;i<2;i++)
	{
		if (PLC_FOR==0) return 0;
	}
	return 1;
}

bit testBack()
{
	unsigned char i;

	for(i=0;i<2;i++)
	{
		if (PLC_BACK==0) return 0;
	}
	return 1;
}

bit testStep()
{
	unsigned char i;

	for(i=0;i<100;i++)
	{
		if (PLC_STEP==0) return 0;
	}
	return 1;
}

void delay(unsigned long l)
{
	while(l!=0)
	{
		WDI=!WDI;
		l--;
	}
}

unsigned char getMessage()
{
	WDI=!WDI;
	B_F=1;
	B_B=1;
	B_STEP=1;
	if (B_F==0)
	{
		return MSG_FOR;
	}
	if (B_B==0)
	{
		return MSG_BACK;
	}
	if (B_STEP==0)
	{
		return MSG_STEP;
	}
	return MSG_NONE;
}

void main()
{
	bit b_for,b_back,b_step;

	workMod=WORK_NONE;
	CON_DIR=DIR_BACK;

	while(1)
	{
		b_for=testFor();
		b_back=testBack();
		b_step=testStep();
		switch(getMessage())
		{
		case MSG_NONE:
			break;
		case MSG_FOR:
			if(workMod!=WORK_FOR)
 		    {
				workMod=WORK_FOR;
				CON_DIR=DIR_FOR;
			}
			else
			{
				workMod=WORK_NONE;
			}
			delay(10000);
			break;
		case MSG_BACK:
			if(workMod!=WORK_BACK)
 		    {
				workMod=WORK_BACK;
				CON_DIR=DIR_BACK;
			}
			else
			{
				workMod=WORK_NONE;
			}
			delay(10000);
			break;
		case MSG_STEP:
			if(workMod==WORK_NONE)
			{
				workMod=WORK_STEP;
				StepOne();
				workMod=WORK_NONE;
			}
			break;
		}
		if (b_step==1)
		{
			StepOne();
		}
		if( (workMod==WORK_NONE) && (b_for==0) && (b_back==0) )
		{
			CON_PUL=1;
		}
		else
		{
			if(b_for==1)
			{
				CON_DIR=DIR_FOR;
			}
			else if(b_back==1)
			{
				CON_DIR=DIR_BACK;
			}
			CON_PUL=0;
			delay(5);
			CON_PUL=1;
			delay(20);					
		}
	}
}

void StepOne()
{
	unsigned char i;

	CON_DIR=DIR_FOR;
	for(i=0;i<STEP_COU;i++)
	{
		WDI=!WDI;
		CON_PUL=0;
		delay(5);
		CON_PUL=1;
		delay(20);					
	}
	delay(10000);
}