LAUNCHXL-F280025C: PMbus debug problem

Hi, 

Can you please add more details to your questions?

Which PMBus command did you try to run? 

Are you using two Launch-xl F280025C boards - one as master/controller and the other as slave/target?

Best Regards

Siddharth

Hi Siddharth

PU:

TMS320F280025C

Hardware platform:

        LAUNCHXL-F280025C

Software code:

        pmbus_over_i2c, TI's official DEMO source code

IDE development environment:

        Code Composer Studio Version: 11.0.0.00012

Compiler version:

           TUE v21.6.0.LTS

A detailed description of the problem:

           The PMBUS stack uses the TI official source code, and with pmbus_over_i2c,the hostwrites data normally.

The host reads the data abnormally, the data does not answer, pulls the SCL line down, resulting in the bus BUSY not being able to communicate properly.

Read the data i2c bus timing diagram:

Gabriel, 

Will look into it and get back to you in a couple of days.

Will use the examples (28002x_pmbus_over_i2c_master) and (28002x_pmbus_over_i2c_slave) to reproduce the issue that you are seeing.

Can you let if you are seeing this issue for a particular PMBus command?

Best Regards

Siddharth