无桥PFC中controlsuit中的例程问题

配置连线的时候， ADCDRV_1ch_Rlt2连的是Vbus;

#if (INCR_BUILD == 3)  // Closed Current Loop & closed volt loop Bridgeless PFC
//———————————————————————-
 // Lib Module connection to "nets" ADCDRV_1ch_Rlt1 = &Ipfc;
 ADCDRV_1ch_Rlt2 = &Vbus;
 ADCDRV_1ch_Rlt3 = &VL_fb;
 ADCDRV_1ch_Rlt4 = &VN_fb;

但是之前的定义*ADCDRV_1ch_Rlt3 // instance #3, Vbus，这个是什么情况？

// ADC
extern volatile long *ADCDRV_1ch_Rlt1; // instance #1, IpfcA
extern volatile long *ADCDRV_1ch_Rlt2; // instance #2, IpfcB
extern volatile long *ADCDRV_1ch_Rlt3; // instance #3, Vbus
extern volatile long *ADCDRV_1ch_Rlt4; // instance #4, VL_fb
extern volatile long *ADCDRV_1ch_Rlt5; // instance #5, VN_fb