LCD1602

介绍

引脚及应用电路

原理图

内部结构框图

存储器结构

时序结构

LCD1602指令集

LCD1602操作流程

字符,字符串

编写LCD1602代码

LCD1602.c

#include <REGX52.H>

sbit LCD_RS=P2^6; //1数据0指令
sbit LCD_RW=P2^5; //1读0写
sbit LCD_E=P2^7; //1数据有效,下降沿执行

#define LCD_DataPort P0

void LCD_Delay1ms(void)	//@12.000MHz
{
	unsigned char data i, j;

	i = 2;
	j = 239;
	do
	{
		while (--j);
	} while (--i);
}

void LCD_WriteCommand(unsigned char Command)
{
	LCD_RS=0;
	LCD_RW=0;
	LCD_DataPort=Command;
	LCD_E=1;
	LCD_Delay1ms();
	LCD_E=0;
	LCD_Delay1ms();
}

void LCD_WriteData(unsigned char Data)
{
	LCD_RS=1;
	LCD_RW=0;
	LCD_DataPort=Data;
	LCD_E=1;
	LCD_Delay1ms();
	LCD_E=0;
	LCD_Delay1ms();
}

void LCD_Init()
{
	LCD_WriteCommand(0x38); //八位数据接口,两行显示,5*7点阵
	LCD_WriteCommand(0x0C); //显示开,光标关,闪烁关
	LCD_WriteCommand(0x06); //数据读写操作后,光标自动加一,画面不动
	LCD_WriteCommand(0x01); //清屏
}

void LCD_SetCursor(unsigned char Line,unsigned char Column)
{
	if(Line==1)
	{
		LCD_WriteCommand(0x80|(Column-1)); //设置光标位置
	}
	else
	{
		LCD_WriteCommand(0x80|(Column-1)+0x40);
	}
}

void LCD_ShowChar(unsigned char Line,unsigned char Column,unsigned char Char)
{
	LCD_SetCursor(Line,Column);
	LCD_WriteData(Char);
}

void LCD_ShowString(unsigned char Line,unsigned char Column,unsigned char *String)
{
	unsigned char i;
	LCD_SetCursor(Line,Column);
	for(i=0;String[i]!='\0';i++)
	{
		LCD_WriteData(String[i]);
	}
}

int pow(int X,int Y)
{
	int Res=1;
	while(Y--)
	{
		Res*=X;
	}
	return Res;
}

void LCD_ShowNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length)
{
	LCD_SetCursor(Line,Column);
	while(Length--)
	{
		LCD_WriteData(Number/pow(10,Length)%10+'0');
	}
}

void LCD_ShowSignedNum(unsigned char Line,unsigned char Column,int Number,unsigned char Length)
{
	unsigned int Number1;
	LCD_SetCursor(Line,Column);
	if(Number>=0)
	{
		LCD_WriteData('+');
		Number1=Number;
	}
	else
	{
		LCD_WriteData('-');
		Number1=-Number;
	}
	while(Length--)
	{
		LCD_WriteData(Number1/pow(10,Length)%10+'0');
	}
}

void LCD_ShowHexNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length)
{
	unsigned char SingleNumber;
	LCD_SetCursor(Line,Column);
	while(Length--)
	{
		SingleNumber=Number/pow(16,Length)%16;
		if(SingleNumber>9)
		{
			LCD_WriteData(SingleNumber+'A'-10);
		}
		else
		{
			LCD_WriteData(SingleNumber+'0');
		}
	}
}

void LCD_ShowBinNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length)
{
	unsigned char SingleNumber;
	LCD_SetCursor(Line,Column);
	while(Length--)
	{
		LCD_WriteData(Number/pow(2,Length)%2+'0');
	}
}

LCD1602.h

#ifndef __LCD1602_H__
#define __LCD1602_H__

void LCD_WriteCommand(unsigned char Command);
void LCD_Init();
void LCD_ShowChar(unsigned char Line,unsigned char Column,unsigned char Char);
void LCD_ShowString(unsigned char Line,unsigned char Column,unsigned char *String);
void LCD_ShowNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length);
void LCD_ShowSignedNum(unsigned char Line,unsigned char Column,int Number,unsigned char Length);
void LCD_ShowHexNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length);
void LCD_ShowBinNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length);

#endif

main.c

#include <REGX52.H>
#include "LCD1602.h"
#include "Delay.h"

void main()
{
	LCD_Init();
	LCD_ShowBinNum(1,1,0xA5,8);
	LCD_ShowString(1,16,"Welcome to China!");
	
	while(1)
	{
		Delay(200);
		LCD_WriteCommand(0x18);
		Delay(200);
	}
}

运行效果

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