#define _LCD_C_
#include "LCD.h"
#include <iom16v.h>
//==========================================
//函數(shù)名稱(chēng)：液晶模塊使能
//函數(shù)作用: 使能液晶
//入口參數(shù): 無(wú)
//返回類(lèi)型：無(wú)
//==========================================
void LCD_en_write(void)
{
  EN_SET;
  delay_nus(4);
  EN_CLR;
}

//==========================================
//函數(shù)名稱(chēng)：寫(xiě)指令
//函數(shù)作用:
//入口參數(shù): 液晶指令command
//返回類(lèi)型：無(wú)
//==========================================
void LCD_write_command(uchar command)
{
  delay_nus( 16 );
  RS_CLR;
  DB &= 0X0F;           //清高四位
  DB |= command & 0xf0; //寫(xiě)高四位
  LCD_en_write();
  command=command << 4;   //低四位移到高四位
  DB &= 0x0f;             //清高四位
  DB |= command & 0xf0;   //寫(xiě)低四位
  LCD_en_write();
  //delay_nms(2);         //清屏指令時(shí)間很長(zhǎng), 保險(xiǎn)起見(jiàn)，可以增加
}

//==========================================
//函數(shù)名稱(chēng)：寫(xiě)數(shù)據(jù)
//函數(shù)作用:
//入口參數(shù): 數(shù)據(jù)DATA
//返回類(lèi)型：無(wú)
//==========================================
void LCD_write_data(uchar DATA)
{
  delay_nus(16);
  RS_SET;           //RS=1
  DB &= 0X0f;       //清高四位
  DB |= DATA&0xf0;  //寫(xiě)高四位
  LCD_en_write();
  DATA = DATA << 4; //低四位移到高四位
  DB &= 0X0f;       //清高四位
  DB |= DATA&0xf0;  //寫(xiě)低四位
  LCD_en_write();
}

//==========================================
//函數(shù)名稱(chēng)：液晶初始化函數(shù)
//函數(shù)作用:
//入口參數(shù): 無(wú)
//返回類(lèi)型：無(wú)
//==========================================
void LCD_init( void )
{
  DB_DDR_OUT;
  LCD_write_command(0x28);
  LCD_en_write();           //********總結(jié)這里一定要加這液晶使能*********
  delay_nus(20);
  LCD_write_command(0x28);  //4位顯示
  LCD_write_command(0x0c);  //顯示開(kāi)
  LCD_write_command(0x01);  //清屏
  delay_nms(5);             //延時(shí)一定要長(zhǎng)
}

//==========================================
//函數(shù)名稱(chēng)：寫(xiě)地址
//函數(shù)作用:
//入口參數(shù): 行位置r, 列位置c
//返回類(lèi)型：無(wú)
//==========================================
void LCD_set_rc( uchar r, uchar c )
{
    uchar address;

    if (r == 1)
    address = 0x80 + c;
    else if(r == 2)
    address = 0xc0 + c;

    LCD_write_command( address );
}

//==========================================
//函數(shù)名稱(chēng)：寫(xiě)字符串
//函數(shù)作用: 在指定位置寫(xiě)一串字符串
//入口參數(shù): 行位置r， 列位置c, 字符串*s
//返回類(lèi)型：無(wú)
//==========================================
void LCD_write_string(uchar r, uchar c, uchar *s)
{
    LCD_set_rc( r, c ); //寫(xiě)地址

    while( *s )     	 	// 寫(xiě)顯示字符
    {
      LCD_write_data( *s );
      s++;
    }
}

void LCD_write_char(uchar r, uchar c, uchar DATA)				   //寫(xiě)字符
{
 	 LCD_set_rc( r, c );
	 LCD_write_data( DATA );
}

//==========================================
//函數(shù)名稱(chēng)：寫(xiě)字符數(shù)組
//函數(shù)作用: 在指定位置寫(xiě)一串字符串
//入口參數(shù): 行位置r， 列位置c, 字符數(shù)組chardata[], 字符個(gè)數(shù)
//返回類(lèi)型：無(wú)
//==========================================
void LCD_write_array( uchar r, uchar c, uchar array[] )
{
 	uchar i = 0;
    while( array[i] != '\0' )
	{
	 	 LCD_write_char( r, c, array[i] );
	     if( ++c == 16 )
		 {
		     if( r == 1 )
			 {   
			     c = 0;
				 r = 2;
		  	  	 LCD_write_char( r, c, array[i] );
			 }
			 
			 else if( r == 2 )
			 {
			  	 c = 0;
				 r = 1;
				 LCD_write_char( r, c, array[i] );
		     }
	     }
		 i++;
	}  
}

//返回整形數(shù)據(jù)的長(zhǎng)度
char lengh_longint( long unsigned datalongint )
{
    long signed datatmp = datalongint;
    uchar data_n = 0;
    while( datatmp != 0 )
    {
        datatmp /= 10;
        data_n++;
    }

    if( datalongint == 0 )
    {
        data_n = 1;
    }

    return data_n;
}


//==========================================
//函數(shù)名稱(chēng)：顯示一個(gè)整型數(shù)據(jù)
//函數(shù)作用: 在指定位置顯示整數(shù)
//入口參數(shù): 行位置r， 列位置c, 字符數(shù)組dataint[]
//返回類(lèi)型：無(wú)
//==========================================
void LCD_write_datalongint( uchar r, uchar c, long int dataint )
{
    uchar datachar1[8];
    uchar datachar2[8];
    uchar n = 0;
    uchar i =0;
    uchar k =0;        //取字符個(gè)數(shù)
    uchar kk = 0;      //取字符個(gè)數(shù)
	long int datainttmp = dataint;
	
    while( datainttmp != 0 )
    {
        datachar1[n++] = ( datainttmp % 10 ) + 0x30;  //轉(zhuǎn)換為字符
        datainttmp /= 10;
    }

    if( dataint != 0 )                   //*/*//*/
    {
        k = n - 1;
        kk = n;

        for( i = 0; i < kk; i++, k-- )
        {
            datachar2[k] = datachar1[i];               //將數(shù)字符串倒過(guò)來(lái)
        }

	    LCD_set_rc( r, c );
        for( i = 0; i < kk; i++ )
        {
            LCD_write_char( r, c++, datachar2[i] );
        }
    }
    
    else
    LCD_write_char( r, c, '0' );
}

//==========================================
//函數(shù)名稱(chēng)：顯示一個(gè)實(shí)型數(shù)據(jù)
//函數(shù)作用: 在指定位置顯示實(shí)型數(shù)據(jù)
//入口參數(shù): 行位置r， 列位置c, 浮點(diǎn)型數(shù)據(jù)datafloat, 放大倍p, 倍數(shù)mm, 
//返回類(lèi)型：無(wú)
//示例    ：LCD_write_datafloat( 1, 2, 0.0123, 10000, 4)
//==========================================
void LCD_write_datafloat( uchar r, uchar c, float datafloat, uint p, uint mm)
{
    uchar zhengshu_no = 0;
    uchar whole_fact_n;
    uchar xiaoshu_act_n;
    uchar ling_n;
    
    
    uchar i = 0;
    uchar n = 0;
    uchar k = 0;
    uchar kk = 0;
    uchar datachar1[9];
    uchar datachar2[9];
    uint zhengshu;                 //定義變量zhengshu來(lái)存放實(shí)數(shù)的整數(shù)部分
    uint xiaoxhu;                  //定義變量xiaoshu來(lái)存放實(shí)數(shù)的小數(shù)部分
    
    long int datawhole;
    long int datawholetmp;
    
    uchar zhengshu_n = 0;          //定義整數(shù)部分整數(shù)位數(shù)
    uchar xiaoshu_n = 0;           //定義小數(shù)部分整數(shù)位數(shù)
    uchar datawhole_n = 0;             //定義實(shí)數(shù)放大后的位數(shù)
    float datatemp1_f;
    float datatemp2_f;
    
    datatemp1_f = datafloat;
    datatemp2_f = datafloat;

    zhengshu = ( uint )datatemp1_f;       //取實(shí)數(shù)的整數(shù)部分

    zhengshu_n = lengh_longint( zhengshu );       //如果整數(shù)部分為0, 則只有一位整數(shù), 取整數(shù)位數(shù)
    
    datawhole = datatemp1_f * p;         //將實(shí)數(shù)放大，變成整數(shù), datawhole為放大后的數(shù)

    datawhole_n = lengh_longint( datawhole ); //如果整數(shù)部分為0, datawhole_n 不一定等于小數(shù)的位數(shù)

    whole_fact_n = mm + zhengshu_n;           ///*/*實(shí)際

    if( zhengshu  == 0 )
    {
        xiaoshu_act_n = lengh_longint( datawhole );
        ling_n = mm - xiaoshu_act_n;   //如果整數(shù)為0, 小數(shù)有效位為xiaoshu_act_n
    }

    else xiaoshu_act_n = mm;

    ling_n = mm - xiaoshu_act_n;  //用ling_0記錄小數(shù)部分前面0的位數(shù)

    for( i = 0; i < xiaoshu_act_n; i++ )
    {
        datachar1[n++] = ( datawhole % 10 ) + 0x30;  //轉(zhuǎn)換為字符
        datawhole /= 10;
    }

    k = n - 1;
    kk = n;                                         //記錄存入的個(gè)數(shù)

   for( i = 0; i < kk; i++, k-- )
    {
        datachar2[k] = datachar1[i];               //將數(shù)字符串倒過(guò)來(lái)
    }
	
	LCD_write_datalongint( r, c, zhengshu );    //顯示整數(shù)部分
	c = c + zhengshu_n;
	LCD_write_char( r, c, '.' );
    c++;
    for( i = 0; i < ling_n; i++ )            
    {
        LCD_write_char( r, c++, '0' );
    }

    for( i = 0; i < kk; i++ )
    {
        LCD_write_char( r, c++, datachar2[i] );
    }
}