#include	"7segfun.h"
#define  Dataport P1
#define  SeleWei P2 //选择的是低4位 最低位选个位
unsigned char code LED[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x00,0x40,0x79};//符号+ － E
 //{0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xff,0XBF,0X86}; //共阳 － E
 //{0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x00,0x40,0x79}; //共阴 空 - E
unsigned char code wei[]={0xfe,0xfd,0xfb,0xf7};//低--高
unsigned char num[]={1,2,3,4},N;
void seg_delay(unsigned int k)
{for(;k>0;k--);}

void int2num(int x)
{	if(x>=0){
	num[3]=x>999?(x/1000)%10:10;//
	}
	else
	{  x=-x;
	   	num[3]=11;	  // 负号的位置
		}
	num[2]=x>99?(x/100)%10:10;//	
	num[1]=x>9?(x/10)%10:10;//
    num[0]= x%10;//
}



void Dispnum( int x)
{ 
	unsigned char k;
	int2num(x);		
	for(k=0;k<4;k++)
			{ Dataport=0;//消隐共阴0x00,共阳0xff
				SeleWei=wei[k];//个位先
				
				Dataport=LED[num[k]];//;
        seg_delay(200);
				}

}

//排列num[3]num[2]num[1]num[0]
void Float2Num(float val)//
{
	unsigned int tmp;
	if(val>-99.9&&val<999.9)
	{
		if(val<0) //先确定最高位是否要符号的
	   {	num[3]=11;//符号负数
		    val=-val;
	    }
	  else
	   	num[3]=10;  
 	    
		if(100.0<=val&&val<999.9)   //xxx.x
		{
			N=1; // 小数点1位
			tmp=(unsigned int)(val*10.0);//即倒数第二位
			num[3]=tmp/1000;
		}
		 if(10.0<=val&&val<100.0)//xx.xx
		{ 			
			if(num[3]==10)
			{N=2;// 小数点2位
			tmp=(unsigned int)(val*100.0); 
			num[3]=tmp/1000;}
			else
			{N=1; 
			 tmp=(unsigned int)(val*10.0);
			}
		}
		
		if(0.0<=val&&val<10.0)//xx.xx
		{ 			
			if(num[3]==10)
			{N=2;// 小数点2位
			tmp=(unsigned int)(val*100.0); 
			}
			else
			{N=2; 
			 tmp=(unsigned int)(val*100.0);
			}
		}	
      
	   num[2]=(tmp/100)%10;
	   num[1]=(tmp/10)%10;
	   num[0]=tmp%10;
	}
else//超出了显示范围ERR
{                                                
	num[3]=10;// 空	 
  num[2]=10; //	空
	num[1]=12;	// E
	num[0]=0;	//O
}
	
	
}

void Dispval(float x)
{
unsigned char k;
//ValtoNum(x);//
Float2Num(x);
for(k=0;k<4;k++)
			{ Dataport=0x00;//消隐0X00共阴  、0xFF共阳
				SeleWei=SeleWei|0x0f;
				SeleWei=SeleWei&wei[k];//个位先 wei[]={0xf7,0xfb,0xfd,0xfe}
				
				if(k==N) 
					Dataport=LED[num[k]]|0x80;	 //共阴
				//	Dataport=(LED[num[k]]&0x7F);	 //共阳
				else
				  Dataport=LED[num[k]];
        seg_delay(200);
				}
}