IWR6843ISK: I2C output to J5 connector

user5310849

Part Number: IWR6843ISK

Hello TI, we are facing one problem when trying generating I2C output. We tried ping demo (successfully pinging existing connected units). I believe we have switched the board correctly as described here: https://e2e.ti.com/support/sensors-group/sensors/f/sensors-forum/913878/compiler-iwr6843isk-which-pin-is-scl-and-sda-in-mmwaveicboost-carried-board?tisearch=e2e-sitesearch&keymatch=iwr6843ISK%2525252525252520i2c

Unfortunately, we can't find anything on the oscilloscope when monitoring pins on the J5 connector. See also the attached pictures of switched board (we believe correctly).

Kind regards, Lukas

over 3 years ago

0 Alec May over 3 years ago

TI__Genius 17265 points

Hi Lukas,

Have the signals been pinxmued to the proper pins in the software that you are using?

Best Regards,
Alec

0 user5310849 over 3 years ago in reply to Alec May

Intellectual 730 points

I guess so, we use stock I2C mater test code as is. I guess that it would not be able to ping existing units on the board then. Or am I missing something?

0 Alec May over 3 years ago in reply to user5310849

TI__Genius 17265 points

Hi,

Just to be clear, you are running the I2C test code located at <mmWave_SDK_Loc>/packages/ti/drivers/i2c/test correct?

Best Regards,
Alec

0 user5310849 over 3 years ago in reply to Alec May

Intellectual 730 points

Yes, this is exactly the test code we are using.

0 Alec May over 3 years ago in reply to user5310849

TI__Genius 17265 points

Hi,

Can you confirm via CCS debug that the Test is successfully running? if you use the the prebuilt binary for this test and run it via CCS Debug, the console should output the status of the test. If you could run that and post the CCS debug output and the matching Oscilloscope output, that may help us to narrow down your issue.

Best Regards,
Alec

0 user5310849 over 3 years ago in reply to Alec May

Intellectual 730 points

As I wrote in the beginning, we have an output of the ping test and it is the same like in this thread: https://e2e.ti.com/support/sensors-group/sensors/f/sensors-forum/913878/compiler-iwr6843isk-which-pin-is-scl-and-sda-in-mmwaveicboost-carried-board?tisearch=e2e-sitesearch&keymatch=iwr6843ISK%2525252525252520i2c

But nothing to be seen on the oscilloscope in the same moment...

0 Connor Desmond over 3 years ago in reply to user5310849

TI__Expert 7510 points

Hello,

If you could please provide me with a picture of your setup. This will help me make sure that all the connections are correct.

Best regards,

Connor Desmond

0 user5310849 over 3 years ago in reply to Connor Desmond

Intellectual 730 points

If you mean switches and jumpers, it is in the first post.

0 Connor Desmond over 3 years ago in reply to user5310849

TI__Expert 7510 points

Hello,

If you could please provide some images of the your test probes from your oscilloscope to your ICBOOST that would provide some context for me.

Best regards,

Connor Desmond

0 user5310849 over 3 years ago in reply to Connor Desmond

Intellectual 730 points

We have probes connected like this.

0 Connor Desmond over 3 years ago in reply to user5310849

TI__Expert 7510 points

Hello,

Thank you for the image that looks correct. Next, are you trying to view the ping example that you mentioned earlier in thread, or are you trying to view I2C data from temp/current sensors that are connected via I2C interface? Is the ping example is what you are trying to measure could you please provide the path location of the demo that you are using.

Best,

Connor Desmond

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IWR6843ISK: I2C output to J5 connector