lcd.h

这个源代码是关于MCS-51的无线接收

#include "main.h"
unsigned char databuffer[3];
#define LCD_Data P0
sbit	LCD_RS		=P1^2;
sbit	LCD_E		=P1^0;
sbit	LCD_WR		=P1^1;

/*
返回值Status:	当前地址计数器的值.
*/

unsigned char LCDBusyWait()							//等待LCD就绪
{
	unsigned char Status;
	LCD_RS=0;
	LCD_WR=1;
	LCD_Data=0xFF;
	LCD_E=1;
	Status=LCD_Data;
	LCD_E=0;
	while(Status & 0x80)
	{
//		if(ET0) OSWait(K_TMO,1);
		LCD_E=1;
		Status=LCD_Data;
		LCD_E=0;
	}
	LCD_WR=0;
	return Status;
}

void WriteLCD_Data(unsigned char Data)			//向LCD写入一个字节的数据
{
	LCDBusyWait();
	LCD_RS=1;
	LCD_Data = Data;
	LCD_E=1;
	LCD_E=0;
}

void WriteLCD_Command(unsigned char Command)	//向LCD写入一个字节的命令
{
	LCDBusyWait();
	LCD_RS=0;
	LCD_Data=Command;
	LCD_E=1;
	LCD_E=0;
}

//改变地址,实现了逐行显示
unsigned char ChangeAddress(unsigned char StartAddress)
{
	switch(StartAddress)
	{
		case 0x87:WriteLCD_Command(0x90);StartAddress=0x90;break;
		case 0x8F:WriteLCD_Command(0x98);StartAddress=0x98;break;
		case 0x97:WriteLCD_Command(0x88);StartAddress=0x88;break;
		default:StartAddress+=1;
	}
	return StartAddress;
}

/*
WriteLCD 从LCD输出一个字符串：
	StartAddress为起始地址；
	Size为字符串大小；
	Size==0 时由程序自己判断字符串结束标志，否则输出 Size 个字符，不够则填充空格；
	Charactors为要求输出的字符串；
*/
void WriteLCD(unsigned char StartAddress,unsigned char Size,unsigned char Charactors[])
{
	unsigned char *i=Charactors;	  //字符串的首地址
	WriteLCD_Command(StartAddress);
	if(Size) 		//Size不为0
	{
	//	bit Over=0;
		while(i<(Charactors+Size))		//判断字符串结尾
		{
			/*if(Over)
			{
				WriteLCD_Data(' ');i++;
				if(i>=(Charactors+Size)) break;
				WriteLCD_Data(' ');i++;
			}
			else
			{
//				unsigned char k;
				switch(((*i)*256)+(*(i+1)))
				{

				}
			} */
			WriteLCD_Data(*i);
			i++;
			WriteLCD_Data(*i);
			//i++;
			StartAddress=ChangeAddress(StartAddress); //改变地址,实现了逐行显示
		}
	}
	else			//Size为0
	{
		while(*i)						//判断字符串结尾,*i为0代表结束
		{
			WriteLCD_Data(*i);
			i++;
			WriteLCD_Data(*i);
			i++;
			StartAddress=ChangeAddress(StartAddress);
		}
	}
}
void WriteLcd_Number_4bit(unsigned char Address_4bit,unsigned int Number4bit)
{
	unsigned char Number4_H;			//存放高2位
	unsigned char Number4_L;			 //存放低2位
	Number4_H = Number4bit / 100;
	Number4_L = Number4bit % 100;
	WriteLCD_Number(Address_4bit,Number4_H);
	WriteLCD_Number(Address_4bit + 1,Number4_L);
} 


void WriteLcd_Number_6bit(unsigned char Address_6bit,unsigned char Number6bit)
{
    unsigned char Number6_H;
	unsigned int  temp;
	unsigned char Number4_H;			//存放高2位
	unsigned char Number4_L;			 //存放低2位
	Number6_H = Number6bit /10000; 
	temp=Number6bit-Number6_H*100;
	Number4_H = temp / 100;
	Number4_L = temp % 100;
	WriteLCD_Number(Address_6bit,Number6_H);
	WriteLCD_Number(Address_6bit+1,Number4_H);
	WriteLCD_Number(Address_6bit + 2,Number4_L);
} 
 

/*
//写入数字Number, Number为0-9999的四位数字
void WriteLCD_Number(unsigned char Address,unsigned char Number)
{
	if(Address) WriteLCD_Command(Address); 			//如果地址为0则自动接着原来的位置写.	否则按指定地址写
//	WriteLCD_Data((Number /1000) + 0x30);	   		//取出千位数字
	WriteLCD_Data((Number/100) + 0x30);	   	//取出百位数字
	WriteLCD_Data(Number % 100 / 10 + 0x30);	   		//取出十位数字
	WriteLCD_Data(Number % 10 + 0x30);	   	//取出个位数字
}
*/


//写入数字Number, Number为0-99的两位数字
void WriteLCD_Number(unsigned char Address,unsigned char Number)
{
	if(Address) WriteLCD_Command(Address); //如果地址为0则自动接着原来的位置写.	否则按指定地址写
	WriteLCD_Data((Number/10)+0x30);	   //取商,取出十位数字
	WriteLCD_Data((Number%10)+0x30);	   //取余,取出个位数字

}