MSP430F6779A: 3 Phase energy meter voltage phase sequence reverse connection detection

Part Number:MSP430F6779A

Hi,

I am working on 3 phase energy meter using MSP430F699A. Application Note - SLAA577G

I wanted to detect the R Y B Phase sequence reverse connection.

If input supply is connected in wrong Sequence (R B Y or  Y R B or B Y R), i wanted software to detect it.

How do i do this. Is the logic to detect reverse phase sequence is already implemented.