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BQ4050: The device does not respond to requests when working through a PC with SMBus

Vladislav Nikishov

Prodigy 30 points

Part Number: BQ4050
Other Parts Discussed in Thread: EV2400

Hello,

I use a PC that has an appropriate API for working with SMBus. But on the oscilloscope it can be seen that passing the command to the address 0x16 from the board does not receive an ACK answer. Using the programmer EV2400 and Battery Management Studio everything works well, and the data from the device comes. What could be the problem?

Regards

Vladislav

over 6 years ago

0 Batt over 6 years ago

TI__Mastermind 42535 points

The gauge is only the slave. You need a proper bus master. If you use the ev2400 it does the bus mastering.

0 Vladislav Nikishov over 6 years ago in reply to Batt

Prodigy 30 points

Therefore, authentication is not necessary, and the only problem is that my PC is not a SMBus master?

0 Batt over 6 years ago in reply to Vladislav Nikishov

TI__Mastermind 42535 points

Is your PC running a host software that handles bus mastering? If not, yes. That is why it's not communicating.

0 Vladislav Nikishov over 6 years ago in reply to Batt

Prodigy 30 points

I found the answer. The device address was 0x0B, not 0x16. Don't know why