TMS320F28377S: What is the purpose of functions A, B, C in the main routine?

Part Number:TMS320F28377S

Hello.

I have a question.

I am using the sample code named as "MonoMtrServo_377s" in Control SUITE.

What is the purpose of the function in the description below in MonoMtrServo.c?

Can you tell me how to use it?

// Alpha states
void A0(void); //state A0
void B0(void); //state B0
void C0(void); //state C0

// A branch states
void A1(void); //state A1
void A2(void); //state A2
void A3(void); //state A3

// B branch states
void B1(void); //state B1
void B2(void); //state B2
void B3(void); //state B3

// C branch states
void C1(void); //state C1
void C2(void); //state C2
void C3(void); //state C3

Regards,

uchida-k