#include <reg51.h>
#include <absacc.h>

#include "82c79.h"
      
/********************** 共陰段碼表******************************/
uchar code	LED[] = { 
              0xF3,0x60,0xB5,0xF4,0x66,0xD6,0xD7,0x70,0xF7,0xF6,
//            "0"  "1"   "2"  "3"  "4"  "5"  "6"  "7"  "8"  "9" 
              0x77,0xC7,0x93,0xE5,0x97,0x17,0x37,0x67,0x00 	};
//            "A"  "B"  "C"   "D"  "E"  "F"  "P"  "H"  "熄滅符"

void Delay_8279()                       
{
	uchar i;
	for(i=0;i<200;i++);
}

void SendCmd(uchar DATA)
{
	Cmd8279 =DATA;
	Delay_8279();     	//延時
}

void SendDat(uchar DATA)               
{
  	Dat8279 = DATA;
	Delay_8279();     	//延時
}

void GetKey()
{
	SendCmd(0x40);
	key = Dat8279;
} 

//8279初始化
void Init8279()
{    
    SendCmd(0x00); 		//8字符顯示，左端輸入，內部譯碼雙鍵互鎖
	SendCmd(0x34);   	//設定CLK端的輸入時鐘的分頻系數為31
	SendCmd(0xd3); 		//清除命令 顯示RAM的所有單元均置為零
	IT0=1;
	IE0=1;
	EX0=1;
	EA=1;
}

//數碼管顯示清除
void DispClear()
{
	SendCmd(0xd3); 		
}

//數碼管定位顯示數字
void DispNum(uchar nLed,uchar Num)  
{
    SendCmd(nLed+0x80);
	SendDat(LED[Num]);
}

//數碼管定位顯示16進制數，nLed為個位數字位置
void DispHex(uchar nLed,uchar Hex)  
{
	DispNum(nLed,Hex%16);
	DispNum(nLed+1,Hex/16);
}

//數碼管定位顯示10進制數，nLed為個位數字位置
void DispDec(uchar nLed,uchar Dec)  
{
	DispNum(nLed,Dec%10);
	DispNum(nLed+1,Dec/10);
}
void int0(void) interrupt 0 using 1
{
	GetKey();
}