- Hex_to_Dec

unsigned char Hex_to_Dec(unsigned char Hex_High, unsigned char Hex_Low)
{
    unsigned char k;    
    unsigned char Result;
    unsigned char hex[2];
    unsigned char val[2];
    
    hex[0] = Hex_High;    
    hex[1] = Hex_Low;    
    
    for(k = 0; k < 2; k++) // 0 ~ 1
    {
        if(hex[k] >= '0' && hex[k] <= '9')
        {
           val[k] = hex[k] - 48;
        }
        else if(hex[k] >= 'a' && hex[k] <= 'f')
        {
           val[k] = hex[k] - 97 + 10;   
        }
        else if(hex[k] >= 'A' && hex[k] <= 'F')
        {
           val[k] = hex[k] - 65 + 10;
        }
        
             if(k == 0) Result = val[k] << 4;        
        else if(k == 1) Result |= val[k] << 0;        
    }    
 
    return Result;        
}