/******************************************************
*function: Tangoc48_WR_Reg
*description: write data to Tango c48 register，
*input: reg Tangoc48 address register：
*buf data to be written
*len date's length
*return:  0-succeeded 1-failed
********************************************************/
uint8_t Tangoc48_WR_Reg(u16 reg,uint8_t *buf,uint8_t len)
{
   uint8_t i ;
   uint8_t ret=0;
   IIC_Start();
   IIC_Send_Byte(0XB8); //write command
   IIC_Wait_Ack();
   if(reg>0xFF)
   {
      IIC_Send_Byte(reg>>8); //high 8bit address
      IIC_Wait_Ack();
      IIC_Send_Byte(reg&0XFF); //low 8bit address
      IIC_Wait_Ack();
   }
   else
   {
      IIC_Send_Byte(reg); //low 8bit address
      IIC_Wait_Ack();
   }
   for(i=0;i<len;i++)
   {
      IIC_Send_Byte(buf[i]); //send data
      ret=IIC_Wait_Ack();
      if(ret)break;
   }
   IIC_Stop();
   return ret;
}

/******************************************************
*function: Tangoc48_RD_Reg
*description: read from Tangoc48 address
*input: reg Tango c48 address of register：
*buf data
*Len data length
*return：0-succeeded 1-failed
********************************************************/
void Tangoc48_RD_Reg(u16 reg,uint8_t *buf,uint8_t len)
{
   uint8_t i;
   IIC_Start();
   IIC_Send_Byte(0XB8); //write command
   IIC_Wait_Ack();
   if(reg>0xFF)
   {
      IIC_Send_Byte(reg>>8); //send high 8bit address
      IIC_Wait_Ack();
      IIC_Send_Byte(reg&0XFF); //send low 8bit address
      IIC_Wait_Ack();
      IIC_Start();
      IIC_Send_Byte(0XB9); //send read command
      IIC_Wait_Ack();
   }
   else
   {
      IIC_Send_Byte(reg);
      IIC_Wait_Ack();
      IIC_Start();
      IIC_Send_Byte(0XB9); //send write command
      IIC_Wait_Ack();
   }
   for(i=0;i<len;i++)
   {
      buf[i]=IIC_Read_Byte(i==(len-1)?0:1); //send data
      delay_ms(1);
   }
   IIC_Stop();
}

/******************************************************
*function：Tangoc48_WriteOneByte()
*description: Tangoc48CXX write data to chosen address
*input： WriteAddr target address
*DataToWrite: data
*return： void
********************************************************/
void Tangoc48_WriteOneByte(uint8_t WriteAddr,uint8_t DataToWrite)
{
IIC_Start();
IIC_Send_Byte(0XB8); //send write address data
IIC_Wait_Ack();
IIC_Send_Byte(WriteAddr); //send target address
IIC_Wait_Ack();
IIC_Send_Byte(DataToWrite); //send data
IIC_Wait_Ack();
IIC_Stop(); 
delay_ms(10);
}

/******************************************************
*function：Tangoc48_ReadOneByte()
*description： read from an address in Tangoc48XX 
*input： ReadAddr: read from address
*return： temp--- readed data
********************************************************/
uint8_t Tangoc48_ReadOneByte(uint8_t ReadAddr)
{
uint8_t temp=0;
IIC_Start();
IIC_Send_Byte(0XB8); //send address0XB8
IIC_Wait_Ack();
IIC_Send_Byte(ReadAddr); //read address
IIC_Wait_Ack();
IIC_Start();
IIC_Send_Byte(0XB9); //receive mode
IIC_Wait_Ack();
temp=IIC_Read_Byte(0);
IIC_Stop(); 
return temp;