1. How to judge if the SPI communication is working or not?

1) Per measuring voltage for boost converter to judge.

    Usually the voltage should be above 16V, which indicates SPI communication is functioning.

2) Per the state of BUSY pin

    If BUSY pin outputs high/low level then it indicates SPI communication is functioning.

3) Per read temperature value from IC

    If the read is the same as the environment's, it indicates SPI communication is functioning.

4) Per SPI waveform from oscilloscope

    If the out put is consistent with what is in the specification, it indicates SPI communication is functioning.

2. Troubleshooting for abnormal SPI communication?

1) Check the IO config

2) Check the wiring

3) Check if the power is insufficient, which usually should be above 2.5V

4) Check the hardware SPI config