void BQ27421_Config(void)
{
	u8 Rec_data=0;
	int Temp=0,checksum82=0;
	u16 Csum=0,Des_cap=0,Down_vol=0,Des_eng=0,Tap_num=0;
	BQ27421_Write_Memory(0x00,0x00,0x80);	//?a¡¤aD???0x8000
	BQ27421_Write_Memory(0x00,0x00,0x80);	
	BQ27421_Write_Memory(0x00,0x13,0x00);	//?????¡ê¨º?
	delay_ms(2000);
	
	Rec_data=BQ27421_Read_Memory(0x06);	
	if((Rec_data&0x10))	
	{
		BQ27421_Write_Byte(0x61,0x00);	//?a¨º?D¡äRAM 
		BQ27421_Write_Memory(0x3e,0x52,0x00);	//D¡ä¨¨?¨¦¨¨??2?¨ºy
	
		Csum=    BQ27421_Read_Memory(0x60);
		Des_cap= BQ27421_Read_Memory(0x4A);		//?¨¢3?¨¤¡ä¨¦¨¨??¦Ì?3?¨¨Y¨¢?
		Down_vol=BQ27421_Read_Memory(0x50);		//1???¦Ì??1
		Des_eng= BQ27421_Read_Memory(0x4C);		//¦Ì?3?¨¨Y¨¢?
		Tap_num= BQ27421_Read_Memory(0x5B);		//¨¦¨¨????¨¢¡Â¦Ì?¨¢¡Â
		
		//¡À¨º¡Á?¦Ì??a0x40+X?a¦Ì??¡¤¨ºy
		BQ27421_Write_Byte(0x4A,Designcapacity>>8);		//¨¦¨¨??¦Ì?3?¨¨Y¨¢?4A 0x0190		400MA
		BQ27421_Write_Byte(0x4B,Designcapacity&0xff);
		BQ27421_Write_Byte(0x50,terminatevoltage>>8);	//?¦Ì¨ª31?¡À?¦Ì??150 0x0D48		3400MV
		BQ27421_Write_Byte(0x51,terminatevoltage&0xff);
		BQ27421_Write_Byte(0x4C,DesignEnergy>>8);		//¨¦¨¨??¦Ì??¡ä¨¨Y¨¢?4C 0x05C8		400*3.7v
		BQ27421_Write_Byte(0x4D,DesignEnergy&0xff);	
		BQ27421_Write_Byte(0x5B,Taperrate>>8);			//??¨¢¡Â¦Ì?¨¢¡Â¨¨Y¨¢?5B 0x0056		86	
		BQ27421_Write_Byte(0x5C,Taperrate&0xff);
		
//		Temp=(255-(u8)(Csum&0xff)-(u8)((Csum>>8)&0xff)-(u8)(Des_cap&0xff)-(u8)((Des_cap>>8)&0xff))%256;
//		checksum82=(u8)255-((Temp+((Designcapacity>>8)&0xff)+(Designcapacity&0xff))%256);
		
		
		Temp=(255 -((Csum>>8)&0xff)-(Csum&0xff)-((Des_cap>>8)&0xff)-(Des_cap&0xff)-((Down_vol>>8)&0xff)-(Down_vol&0xff)-((Des_eng>>8)&0xff)-(Des_eng&0xff)-((Tap_num>>8)&0xff)-(Tap_num&0xff) )%256;
		checksum82=(u8)(255- ( (Temp+((Designcapacity>>8)&0xff)+(Designcapacity&0xff)+((terminatevoltage>>8)&0xff)+(terminatevoltage&0xff)+((DesignEnergy>>8)&0xff)+(DesignEnergy&0xff)+((Taperrate>>8)&0xff)+(Taperrate&0xff) ) %256));			
//		if(checksum82!=0xbc)
		BQ27421_Write_Byte(0x60,checksum82);

		BQ27421_Write_Memory(0x3e,0x42,0x00);	//¨ª?3??????¡ê¨º?
		delay_ms(1000);	
	}
	Rec_data=BQ27421_Read_Memory(0x06);		
	if((Rec_data&0x10)==0)			//¨¨?1?¡ä|¨®¨²?a¡¤a¡Á¡ä¨¬?
	{
		BQ27421_Write_Memory(0x00,0x20,0x00);//?¨¹¡¤a¨¦¨¨¡À?¡¤??¨º¦Ì??¡¤
	}
}