display.c

变频器调试参数的程序,1602的液晶显示器,AVR芯片,可以作为参考资料学习使用

#include "externh.h"
#define Pout_LCD_RS		((*((volatile PORTBIT *)&PORTB)).Bit5) 	
#define Pout_LCD_RW		((*((volatile PORTBIT *)&PORTD)).Bit3) 	
#define Pout_LCD_E		((*((volatile PORTBIT *)&PORTD)).Bit4) 	

#define Pout_LCD_D0		((*((volatile PORTBIT *)&PORTB)).Bit1)
#define Pout_LCD_D1		((*((volatile PORTBIT *)&PORTB)).Bit2)
#define Pout_LCD_D2		((*((volatile PORTBIT *)&PORTB)).Bit3)
#define Pout_LCD_D3		((*((volatile PORTBIT *)&PORTB)).Bit4)
#define Pout_LCD_D4		((*((volatile PORTBIT *)&PORTB)).Bit0)
#define Pout_LCD_D5		((*((volatile PORTBIT *)&PORTD)).Bit7)
#define Pout_LCD_D6		((*((volatile PORTBIT *)&PORTD)).Bit6)
#define Pout_LCD_D7		((*((volatile PORTBIT *)&PORTD)).Bit5)

#define DELAYTIME_1		10		//100
#define DELAYTIME_2		20		//200

U8 *string;
void LCDWrite(U8 cmd,U8 rs,U8 dat);
U8 LCDReadStatus(void);
void DispStr(U8 x,U8 y)
{//在(x,y)处显示字符串*string.
	U8 tmp;
	tmp = x&0x0f;
	if(ChkBit(y,0)) tmp |=0x40;
	tmp |=0x80;
	LCDWrite(1,0,tmp);
	while(*string){
		LCDWrite(1,1,*string);
		string++;
	}
}
void Cls(void)
{
	LCDWrite(1,0,1);
}
void SetDataPortOut(void)
{
	DDRB |=(1<<0)|(1<<1)|(1<<2)|(1<<3)|(1<<4);
	DDRD |=(1<<5)|(1<<6)|(1<<7);
}
void LCDInit(void)
{
	DDRB |=(1<<5);
	DDRD |=(1<<3)|(1<<4);
	SetDataPortOut();
	Delay(DELAYTIME_2);
	Pout_LCD_E=0;
	Pout_LCD_RW=0;
	Pout_LCD_RS=0;
	LCDWrite(0,0,0x38);
	Delay(DELAYTIME_1);
	LCDWrite(0,0,0x38);
	Delay(DELAYTIME_1);
	LCDWrite(0,0,0x38);
	Delay(DELAYTIME_1);
	LCDWrite(1,0,0x38);
	LCDWrite(1,0,0x08);
	LCDWrite(1,0,0x01);
	LCDWrite(1,0,0x06);
	LCDWrite(1,0,0x0c);
}
void LCDWrite(U8 cmd,U8 rs,U8 dat)
{
	U16 t1;
	if(cmd) LCDReadStatus();
	Pout_LCD_RW=0;
	if(rs)
		Pout_LCD_RS=1;	//对数据进行操作.
	else
		Pout_LCD_RS=0;	//对命令进行操作.
	
	if(ChkBit(dat,0)) Pout_LCD_D0=1;
	else			  Pout_LCD_D0=0;
	if(ChkBit(dat,1)) Pout_LCD_D1=1;
	else			  Pout_LCD_D1=0;
	if(ChkBit(dat,2)) Pout_LCD_D2=1;
	else			  Pout_LCD_D2=0;
	if(ChkBit(dat,3)) Pout_LCD_D3=1;
	else			  Pout_LCD_D3=0;
	if(ChkBit(dat,4)) Pout_LCD_D4=1;
	else			  Pout_LCD_D4=0;
	if(ChkBit(dat,5)) Pout_LCD_D5=1;
	else			  Pout_LCD_D5=0;
	if(ChkBit(dat,6)) Pout_LCD_D6=1;
	else			  Pout_LCD_D6=0;
	if(ChkBit(dat,7)) Pout_LCD_D7=1;
	else			  Pout_LCD_D7=0;
	Pout_LCD_E=1;
	for(t1=0;t1<50;t1++);
	Pout_LCD_E=0;
}
U8 LCDReadStatus(void)
{//读LCD的D7.
	U8 ch;
	ClrBit(DDRD,5);		//D7.
	Pout_LCD_E=0;
	Pout_LCD_RW=1;
	Pout_LCD_RS=0;
	Pout_LCD_E=1;
	while(1){
		if(!ChkBit(PIND,5)) break;		//D7.
	}
	Pout_LCD_E=0;
	SetBit(DDRD,5);
	return (ch);
}