ADS122S14: ADS122S14 IDAC Configuration Causes SPI Communication Failure

Part Number: ADS122S14
Other Parts Discussed in Thread: MSPM0G3507,

Hardware setup:

MCU: MSPM0G3507

ADC: ADS122S14

problem:The initialization using the DEMO program can communicate with the ADC. However, after modifying the initialization, I was unable to communicate with the ADC, and even when I used the DEMO program for initialization again, I still couldn't communicate with the ADC. Has the ADC failed?I need design a three-wire PT100 RTD measurement and two IDAC current source.Could you please help me analyze what caused this?

demo program:

demo.png

my program:

myself.png