LCD1602调试工具

LCD作为显示屏是单片机工作返回数据最直观的体现。

下面将以模块化编程的思想调用LCD进行显示。

如下代码就是LCD的模块，显示时调用即可；

#include 

sbit LCD_RS=P2^6;
sbit LCD_RW=P2^5;
sbit LCD_EN=P2^7;
#define LCD_DataPort P0

void LCD_Delay()
{
	unsigned char 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_EN=1;
	LCD_Delay();
	LCD_EN=0;
	LCD_Delay();
}


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


void LCD_SetCursor(unsigned char Line,unsigned char Column)
{
	if(Line==1)
	{
		LCD_WriteCommand(0x80|(Column-1));
	}
	else if(Line==2)
	{
		LCD_WriteCommand(0x80|(Column-1+0x40));
	}
}


void LCD_Init()
{
	LCD_WriteCommand(0x38);
	LCD_WriteCommand(0x0c);
	LCD_WriteCommand(0x06);
	LCD_WriteCommand(0x01);
}


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


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


int LCD_Pow(int X,int Y)
{
	unsigned char i;
	int Result=1;
	for(i=0;i0;i--)
	{
		LCD_WriteData(Number/LCD_Pow(10,i-1)%10+'0');
	}
}


void LCD_ShowSignedNum(unsigned char Line,unsigned char Column,int Number,unsigned char Length)
{
	unsigned char i;
	unsigned int Number1;
	LCD_SetCursor(Line,Column);
	if(Number>=0)
	{
		LCD_WriteData('+');
		Number1=Number;
	}
	else
	{
		LCD_WriteData('-');
		Number1=-Number;
	}
	for(i=Length;i>0;i--)
	{
		LCD_WriteData(Number1/LCD_Pow(10,i-1)%10+'0');
	}
}


void LCD_ShowHexNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length)
{
	unsigned char i,SingleNumber;
	LCD_SetCursor(Line,Column);
	for(i=Length;i>0;i--)
	{
		SingleNumber=Number/LCD_Pow(16,i-1)%16;
		if(SingleNumber<10)
		{
			LCD_WriteData(SingleNumber+'0');
		}
		else
		{
			LCD_WriteData(SingleNumber-10+'A');
		}
	}
}


void LCD_ShowBinNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length)
{
	unsigned char i;
	LCD_SetCursor(Line,Column);
	for(i=Length;i>0;i--)
	{
		LCD_WriteData(Number/LCD_Pow(2,i-1)%2+'0');
	}
}

当然考虑到显示屏更新显示时速度较快，人眼不能识别出来，所以还有一个延迟函数，用于消隐（这里就不书写了，前一章有）以下是主函数调用的方法：LCD1602的.h文件

#ifndef __LCD1602_H__
#define __LCD1602_H__

void LCD_Init();
void LCD_ShowChar(unsigned char Line,unsigned char Column,char Char);// (1,1,'A')显示一个字符；一行:一列:字符
void LCD_ShowString(unsigned char Line,unsigned char Column,char *String);//(1,3,"Hello")显示字符串；若超出那一排则会缺失；
void LCD_ShowNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length);//(1,9,123,3)显示十进制数字;最后的“3”是指显示数字的长度(因为定义类型为0~65535所以范围是1~5)，本例子若最后一位为“2”则不显示最高位即为“23”;
void LCD_ShowSignedNum(unsigned char Line,unsigned char Column,int Number,unsigned char Length);//(1,13,-66,2)显示有符号十进制数字;符号不算在“2”中，但符号显示是从13位开始;
void LCD_ShowHexNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length);//(2,1,0xA8,2)显示十六进制数字;
void LCD_ShowBinNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length);//(2,4,0xAA,8)显示二进制数字;

#endif

主函数：

#include 
#include "LCD1602.h"
#include "Delay.h"

int Result=0;

void main()
{
	LCD_INit();
	LCD_ShowChar(1,1,'A');
	LCD_ShowString(1,3,"Hello");
	LCD_ShowNum(1,9,123,3);
	LCD_ShowSignedNum(1,13,-66,2);
	LCD_ShowHexNum(2,1,0xA8,2);
	LCD_ShowBinNum(2,4,0xAA,8);
 
	while(1)
	{
		 Result=Result+1;
	   LCD_ShowNum(2,14,Result,3);
		 Delay(1000);
	}
}