MCP3428 SPS

long MCP3426::readADC()
{

    raw_adc = 0;

    while(CheckConversion() == 1);

    switch (SPS)
    {
  
        case 12:
                raw_adc = data[0];
                raw_adc &= 0b00001111;
                raw_adc = raw_adc << 8;
                raw_adc |= data[1];

                if(raw_adc > 2047)
                {
                    raw_adc = raw_adc - 4096;
                }
        
                // raw_adc = raw_adc * LSB(1 mV)/PGA for PGA = 1;
        
                break;
    
        case 14:
                raw_adc = data[0];
                raw_adc &= 0b00111111;
                raw_adc = raw_adc << 8;
                raw_adc |= data[1];

                if(raw_adc > 8191)
                {
                    raw_adc = raw_adc - 16384;
                }
        
                // raw_adc = raw_adc * LSB(250 µV)/PGA for PGA = 1;
       
                break;
    
        case 16:

                raw_adc = data[0];
                raw_adc = raw_adc << 8;
                raw_adc |= data[1];

                if(raw_adc > 32767)
                {
                    raw_adc = raw_adc - 65536;
                }
            
                // raw_adc = raw_adc * LSB(62.5 µV)/PGA for PGA = 1;
      
                break;
    }
    return raw_adc;
}