BMP581 I3C Not Working

[choongay]

Hi,
I can get BMP581 to work with I2C and SPI, but not I3C.
Attached is the screenshot for sending a SETDASA command.
It returned NACK for static address.
The static address is 0x46.
I am using SparkFun Pressure Sensor - BMP581 (Qwiic).
What do I missed?

Thanks.

 

[BSTRobin]

Hi choongay,

With your host FPGA, has it successfully communicated with other I3C slave devices?

[choongay]

Hi, Robin.

No, I don't have other I3C slave device.

[BSTRobin · Accepted solution]

Hi choongay,

The waveform of your host's I3C does not meet the I3C specification. We suggest that you refer to the I3C specification to communicate with BMP581.

[choongay]

Hi, Robin.

I still face other issue after fixing the repeated start.

I am getting a response 0x63 for GETBCR command. 

This is not an expected value.

Is it a valid command to read the BCR using static address?

I did tried SETDASA but unable to set the dynamic address as I cannot communicate with the sensor using dynamic address.

The oscilloscope shows unexpected ACK on address which confuse me.

The screenshot shows I am using 0x13.

The first digit may be ignored by the sensor, I am not sure.

But I did tried with other value also such as 0x12.

Another question is does the I3C works with pull up resistors?

I am using 100KHz - 200KHz and my setup cannot disable the pull up on the fly.

Thank you very much.