5. 51单片机 LCD1602调试工具

本专栏所有引脚及端口 代码及注解 选择的是BST-V51 单片机

需结合具体的单片机原理图进行分析

接下来的本专栏都选择该单片机及其原理图分析来进行操作

以后的学习中都对此类进行模块化编程，将各个模块分开进行设计和编写，最后调用就行，不会模块化编程的友友可以先去第4节看

使用 LCD1602 液晶屏作为调试窗口，提供类似 printf 函数的功能，可实时观察单片机内部数据的变换情况，便于调试和演示。

#ifndef __LCD1602_H__
#define __LCD1602_H__


void LCD_Init();  //初始化
void LCD_ShowChar(unsigned char Line,unsigned char Column,unsigned char Char);  //显示一个字符
void LCD_ShowString(unsigned char Line,unsigned char Column,unsigned char *String); //显示字符串
void LCD_ShowNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length); //显示十进制数字
void LCD_ShowSignedNum(unsigned char Line,unsigned char Column,int Number,unsigned char Length);   //显示有符号十进制数字
void LCD_ShowHexNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length);  //显示十六进制数字
void LCD_ShowBinNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length);  //显示二进制数字
void LCD_ShowOctNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length);  //显示八进制数字
void LCD_SetCursor(unsigned char Line,unsigned char Column);    //光标
#endif

需要注意：选择的是 STC89C5xRC 系列芯片(头文件)

1ms 延时函数为 11.0592MHZ

不同的 LCD1602 需要选用不同的引脚，所以引脚定义有所不同需根据原理图进行定义

 

#include 
#include 

//引脚定义
sbit LCD_RS=P1^0;
sbit LCD_RW=P1^1;
sbit LCD_E=P2^5;
#define LCD_DataPort P0


void LCD_Delay()		//@11.0592MHz  1ms
{
	unsigned char i, j;
	_nop_();
	i = 2;
	j = 199;
	do
	{
		while (--j);
	} while (--i);
}



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


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


void LCD_Init(void)
{
	LCD_WriteCommand(0x38); //0011 1000设置数据存储器
	LCD_WriteCommand(0x0C); //0000 1111开启光标(0x0f); 0x0C关闭光标显示  
	LCD_WriteCommand(0x06);
	LCD_WriteCommand(0x01);
}


void LCD_SetCursor(unsigned char Line,unsigned char Column)
{
	if(Line==1)
	{
		LCD_WriteCommand(0x80|(Column-1));
	}
	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]!='';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('0'+Number/LCD_Pow(10,i-1)%10);
	}
}



void LCD_ShowOctNum(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('0'+Number/LCD_Pow(8,i-1)%8);
	}
}


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('0'+Number1/LCD_Pow(10,i-1)%10);
	}
}


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


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('0'+Number/LCD_Pow(2,i-1)%2);
	}
}

注意：需要将 LCD1602.h 和 LCD1602.c 两个文件添加到工程文件 Project 项目目录下

然后在主函数目录下进行调用 main.c

#include 
#include "LCD1602.h"
//#include 

void main(){
    LCD_Init(); //LCD 初始化
    LCD_ShowChar(1,1,'A'); //在 1 行 1 列显示字符 A
    LCD_ShowString(1,3,"Hello"); //在 1 行 3 列显示字符串 Hello
    LCD_ShowNum(1,9,66,2); //在 1 行 9 列显示数字 66，长度为 2
    LCD_ShowSignedNum(1,12,-88,2); //在 1 行 12 列显示有符号数字-88，长度为 2
    LCD_ShowHexNum(2,1,0xA5,2); //在 2 行 1 列显示十六进制数字 0xA5，长度为 2
    LCD_ShowBinNum(2,4,0xA5,8); //在 2 行 4 列显示二进制数字 0xA5，长度为 8
    LCD_ShowChar(2,13,0xDF); //在 2 行 13 列显示编码为 0xDF 的字符
    LCD_ShowChar(2,14,'C'); //在 2 行 14 列显示字符 C
    while(1){

        }
}

转载于：博客园