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BQ78350-R1: how to communicate msp430fr6989 to Bq78350 via smbus

Part Number: BQ78350-R1
Other Parts Discussed in Thread: MSP430FR6989, BQ78350, BQ76940, EV2400, BQSTUDIO

For bms , 1. I am trying to communicate msp430fr6989 to BQ78350 companion controller via smbus but i am not able to see the ack in DSO.

2. schematics to communicate the msp430 to AFE BOARD is attached below.

here msp430 will connect to bq78350 via smbus and that bq78350 will internally communicate bq76940 via i2c.Here we are not using ev2400 to communicate .we need only msp430 to communiate the afe board

Q1 : How to communicate excatly to BQ78350 through smbus to get a ACK.

Q2: Acutally msp430 is 3.3v and bq78350 is operating at 2.5v whether it will work when two voltage is different and what is the solution for this ?

Q3. Any pull up is required to communicate?

Q4 : Please share the related sample code how to communicate with msp430fr6989 to Bq78350 via smbus.

Q5 :Is there any shunts need to be modified in afe evalution board ?

please reply to the above question

thanks & regards

senthilvel