ADC on RCM6710

I'm add ADC type ADS7870 on RCM6710. I'm use pin :
PB0 for SCLK, PE0 for Busy, PD4 for SDI, PD5 for SDO and PE3 for CS.
I'm already modify ADCCS-LOW and ADCCS_HIGH on ADC_ADS7870.LIB to PE3,
other pin already same. On RCM67xx.LIB, port already setting for
output and input.
Running sample program AD_CAL_CHAN.C with random voltage but result all 0.

I'm test sample program and ADC library use RCM4200 and running well.

Maybe have special setting in RCM6710 ?

Thanks.
Stev