TPS65981EVM: FTDI Adapter Kit Connection

Jerry%20Leung

Intellectual 905 points

Part Number: TPS65981EVM

Hello,

I am working with a customer who is having trouble establishing a connection with the FTDI device from the EVM.

Below are a few questions already asked:

- Is the barrel jack plugged into the 81? If not, there will be no I2C or SPI communication to the device.

Yes, I have 20V and the LED comes on

- Are you able to read anything on the I2C scanner with the Utilities GUI?

Nothing. It seems to be acting like it doesn’t even see the FTDI at all

- Can you view the FTDI on your devices in windows?

I have 4 virtual COM ports that show up in the device manger (COM67-70)

He also mentioned that he has already tried installing on a different PC but has gotten the same result with the same error..

Please let me know if there are other things we can do to help solve this issue.

Thanks in advance,

Jerry

over 8 years ago

0 Jaime C over 8 years ago

TI__Intellectual 990 points

Hi Jerry,

Thank you for your post. We realize this is a common issue due to the way FTDI and different systems interact.

I would recommend first uninstall the Host Interface Tool. When you reinstall the tool ensure that you 'Uninstall all previous versions of FTDI' and install the FTDI drive that comes with the tool. We recommend using FTDI v2.08 (the latest is 2.12). This version comes with the tool and is found to be the most stable version. When you don't uninstall other versions, your system will use the latest one (whichever one that may be).

Jaime

0 user4996832 over 8 years ago in reply to Jaime C

TI__Prodigy 40 points

Hi Jaime,

I have a question about the same board and using the host utility GUI.

It works on Jerry's laptop showing the mode register as APP, but on mine it says that the mode register reads BOOT.

The I2C addresses shown after scanning are also different. Jerry's shows 0x0 and 0x3f. Mine shows 0x3f and 0x6b.

If you could provide some insight as to what might be incorrect, that would be much appreciated.

Thanks in advance!

Harrison

0 Jaime C over 8 years ago in reply to user4996832

TI__Intellectual 990 points

Hi Harrison,

This is most likely not related to a laptop/FTDI driver issue. Can you confirm that you are following these steps when you try to reading the registers?

1. Plug in the barrel jack, first.
2. Plug in the Micro-B USB (for FTDI connection).

Sometimes, when the Micro-B is plugged into before the 81 device gets power, the FTDI will hold the SPI lines up. When this happens the 81 will will be stuck in the boot mode.

If you have followed these steps and see the same results, let me know.

Thank you,

Jaime

0 user4996832 over 8 years ago in reply to Jaime C

TI__Prodigy 40 points

Thanks Jamie, plugging in the micro-b connector after the power made it work.

I don't see this advice in the EVM guide or other guides I looked at. Is there a document for procedures like this?

Thanks,

Harrison

0 Jaime C over 8 years ago in reply to user4996832

TI__Intellectual 990 points

Hi Harrison,

I'm glad I was able to help.

We are currently working on the next version of our tool. I will make a note to include all of these debugging tips in the next version of the Tool's User Guide.

Jaime

0 user4996832 over 8 years ago in reply to Jaime C

TI__Prodigy 40 points

Okay. Do you know when the new version will be released? Thanks!

Harrison

0 Jaime C over 8 years ago in reply to user4996832

TI__Intellectual 990 points

We currently don't have a target date set for the release, but I would recommend checking back in a month or two.

Jaime

Consider checking the "Verify Answer" button if I've answered the question to your satisfaction.

0 user4996832 over 8 years ago in reply to Jaime C

TI__Prodigy 40 points

Okay, sounds good. Thanks Jaime!

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TPS65981EVM: FTDI Adapter Kit Connection