51单片机-模块化编程

模块化编程

1.划分模块

c51里面一般都采用模块化的编程方式，比如一个延时函数，如果不采用模块化的设计，每创建一个工程文件都需要对此函数进行编写和声明，这样代码的利用率大大降低，而且代码饿耦合度也比较高，为此c51模块化采用 **.c 和 **.h两种格式的文件对重复率比较高的代码进行模块化设计，以演示函数为例：

delay.c
void delay(unsigned int xms){
	unsigned char i,j;
	while(xms--){
		i = 2;
		j = 239;
		do{
			while(--j);
		}while(--i);
	}
}

dealy.h
 #ifndef __DELAY_H__
 #define __DELAY_H__
 void delay(unsigned int xms);
 #endif

此时只需在main.c中引用即可

#include<regx51.h>
#include "dealy.h"
void main(){
    P2_0 = 1;
    delay(200);
    P2_0 = 1;
    dealy(200);
}

便可以实现对led的闪烁功能

LCD1602模块控制显示屏显示字符串

#include<regx51.h>
#include "LCD1602.H"
void main(){
	LCD_init();
	LCD_ShowString(1,3,"hello word");
	LCD_ShowString(2,3,"made by wiselee");
	
	while(1);


}

显示结果为 hello word made by wiselee

附录 LCD1602的代码

LCD1602.C
#include <REGX52.H>

//寮曡剼閰嶇疆锛?
sbit LCD_RS=P2^6;
sbit LCD_RW=P2^5;
sbit LCD_EN=P2^7;
#define LCD_DataPort P0

//鍑芥暟瀹氫箟锛?
/**
  * @brief  LCD1602寤舵椂鍑芥暟锛?2MHz璋冪敤鍙欢鏃?ms
  * @param  鏃?
  * @retval 鏃?
  */
void LCD_Delay()
{
	unsigned char i, j;

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

/**
  * @brief  LCD1602鍐欏懡浠?
  * @param  Command 瑕佸啓鍏ョ殑鍛戒护
  * @retval 鏃?
  */
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();
}

/**
  * @brief  LCD1602鍐欐暟鎹?
  * @param  Data 瑕佸啓鍏ョ殑鏁版嵁
  * @retval 鏃?
  */
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();
}

/**
  * @brief  LCD1602璁剧疆鍏夋爣浣嶇疆
  * @param  Line 琛屼綅缃紝鑼冨洿锛?~2
  * @param  Column 鍒椾綅缃紝鑼冨洿锛?~16
  * @retval 鏃?
  */
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));
	}
}

/**
  * @brief  LCD1602鍒濆鍖栧嚱鏁?
  * @param  鏃?
  * @retval 鏃?
  */
void LCD_Init()
{
	LCD_WriteCommand(0x38);//鍏綅鏁版嵁鎺ュ彛锛屼袱琛屾樉绀猴紝5*7鐐归樀
	LCD_WriteCommand(0x0c);//鏄剧ず寮€锛屽厜鏍囧叧锛岄棯鐑佸叧
	LCD_WriteCommand(0x06);//鏁版嵁璇诲啓鎿嶄綔鍚庯紝鍏夋爣鑷姩鍔犱竴锛岀敾闈笉鍔?
	LCD_WriteCommand(0x01);//鍏夋爣澶嶄綅锛屾竻灞?
}

/**
  * @brief  鍦↙CD1602鎸囧畾浣嶇疆涓婃樉绀轰竴涓瓧绗?
  * @param  Line 琛屼綅缃紝鑼冨洿锛?~2
  * @param  Column 鍒椾綅缃紝鑼冨洿锛?~16
  * @param  Char 瑕佹樉绀虹殑瀛楃
  * @retval 鏃?
  */
void LCD_ShowChar(unsigned char Line,unsigned char Column,char Char)
{
	LCD_SetCursor(Line,Column);
	LCD_WriteData(Char);
}

/**
  * @brief  鍦↙CD1602鎸囧畾浣嶇疆寮€濮嬫樉绀烘墍缁欏瓧绗︿覆
  * @param  Line 璧峰琛屼綅缃紝鑼冨洿锛?~2
  * @param  Column 璧峰鍒椾綅缃紝鑼冨洿锛?~16
  * @param  String 瑕佹樉绀虹殑瀛楃涓?
  * @retval 鏃?
  */
void LCD_ShowString(unsigned char Line,unsigned char Column,char *String)
{
	unsigned char i;
	LCD_SetCursor(Line,Column);
	for(i=0;String[i]!='\0';i++)
	{
		LCD_WriteData(String[i]);
	}
}

/**
  * @brief  杩斿洖鍊?X鐨刌娆℃柟
  */
int LCD_Pow(int X,int Y)
{
	unsigned char i;
	int Result=1;
	for(i=0;i<Y;i++)
	{
		Result*=X;
	}
	return Result;
}

/**
  * @brief  鍦↙CD1602鎸囧畾浣嶇疆寮€濮嬫樉绀烘墍缁欐暟瀛?
  * @param  Line 璧峰琛屼綅缃紝鑼冨洿锛?~2
  * @param  Column 璧峰鍒椾綅缃紝鑼冨洿锛?~16
  * @param  Number 瑕佹樉绀虹殑鏁板瓧锛岃寖鍥达細0~65535
  * @param  Length 瑕佹樉绀烘暟瀛楃殑闀垮害锛岃寖鍥达細1~5
  * @retval 鏃?
  */
void LCD_ShowNum(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(10,i-1)%10+'0');
	}
}

/**
  * @brief  鍦↙CD1602鎸囧畾浣嶇疆寮€濮嬩互鏈夌鍙峰崄杩涘埗鏄剧ず鎵€缁欐暟瀛?
  * @param  Line 璧峰琛屼綅缃紝鑼冨洿锛?~2
  * @param  Column 璧峰鍒椾綅缃紝鑼冨洿锛?~16
  * @param  Number 瑕佹樉绀虹殑鏁板瓧锛岃寖鍥达細-32768~32767
  * @param  Length 瑕佹樉绀烘暟瀛楃殑闀垮害锛岃寖鍥达細1~5
  * @retval 鏃?
  */
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');
	}
}

/**
  * @brief  鍦↙CD1602鎸囧畾浣嶇疆寮€濮嬩互鍗佸叚杩涘埗鏄剧ず鎵€缁欐暟瀛?
  * @param  Line 璧峰琛屼綅缃紝鑼冨洿锛?~2
  * @param  Column 璧峰鍒椾綅缃紝鑼冨洿锛?~16
  * @param  Number 瑕佹樉绀虹殑鏁板瓧锛岃寖鍥达細0~0xFFFF
  * @param  Length 瑕佹樉绀烘暟瀛楃殑闀垮害锛岃寖鍥达細1~4
  * @retval 鏃?
  */
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');
		}
	}
}

/**
  * @brief  鍦↙CD1602鎸囧畾浣嶇疆寮€濮嬩互浜岃繘鍒舵樉绀烘墍缁欐暟瀛?
  * @param  Line 璧峰琛屼綅缃紝鑼冨洿锛?~2
  * @param  Column 璧峰鍒椾綅缃紝鑼冨洿锛?~16
  * @param  Number 瑕佹樉绀虹殑鏁板瓧锛岃寖鍥达細0~1111 1111 1111 1111
  * @param  Length 瑕佹樉绀烘暟瀛楃殑闀垮害锛岃寖鍥达細1~16
  * @retval 鏃?
  */
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');
	}
}

LCD1602.H
#ifndef __LCD1602_H__
#define __LCD1602_H__

//鐢ㄦ埛璋冪敤鍑芥暟锛?
void LCD_Init();
void LCD_ShowChar(unsigned char Line,unsigned char Column,char Char);
void LCD_ShowString(unsigned char Line,unsigned char Column,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