EV2400: How to target a different device? My board has 2 i2c BQ devices on it.

Hi,

You can force open the correct .bqz for the BQ76952, BQstudio should then connect to the monitor.

Regards,

Evan

How do you do that?

Hi,

Open Bqstudio with no communication connected and select the monitor from the list of .bqz.

Regards,

Evan

This doesn't seem to work. The software still connects to the BQ34Z100 at address 0xAA but with the profile for BQ76952, so all the data is scrambled.

Yea this does not work. Even if I start up with i2c unplugged, using the BQ76952 profile, then plug in the i2c, it detects and loads the BQ34Z100 anyway.

I used an i2c scanner program to confirm that both chips are alive on the i2c bus.

Hi,

After discussing with my team, you will need to disconnect i2c for the BQ34z100 and then reconnect i2c after BQstudio has successfully connected to the monitor.

The thread below had a similar issue.

(+) BQ76952: Communication problem with fuel gauge and battery monitor - Power management forum - Power management - TI E2E support forums

Regards,

Evan

Wow, that is wildly impractical. I'm working with a nearly production ready version of my board and it does not have a way to isolate the chips nondestructively.

Can you fix the BQ Studio software? Addressing a specific chip ought to be a basic requirement for this software.

Hey Steve,

How is the board designed? Ideally, the design should include an MCU that can communicate to 2 I2C devices in parallel and have two output I2C connectors for use externally. Then 2 EV2400 can be connected and used with BQstudio.

Regards,

Nick Richards

the MCU is an ESP32-S3, on a daughter board.

I have both BQ chips on the main board, on the same i2c lines. Since that's what i2c is designed for..............

I'm just going to have to modify some prototypes since the BQ studio isn't capable of addressing the chips properly.

Hello Steve, 

That is the best course of action.

Regards,

Nick Richards