FTDI control signals on i.MX 95 Verdin EVK

Technical Support
1

I see in the schematics that the i.MX 95 Verdin EVK FTDI USB interface is connected to the reset and recovery lines. Would there happen to be existing application note or scripts to control these lines for reloading the board via UUU without having to push buttons?

Regards,
Matt Farley

2

Hi, I’m the Toradex AI Assistant. The Toradex Support team will follow up with you shortly!

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Hello!

The i.MX 95 Verdin Evaluation Kit (EVK) indeed includes a UART interface via an FTDI chip on the USB-C connector. This setup is typically used for serial communication, which is essential for debugging and development purposes.

Regarding the control of reset and recovery lines through the FTDI interface for automated UUU (Universal Update Utility) loading, the documentation might not provide explicit instructions. However, you can generally approach this by using standard FTDI programming practices. Here’s a general guideline:

  1. FTDI Chip Programming: FTDI chips can be programmed using the D2XX drivers provided by FTDI. These drivers allow you to control the GPIO pins of the FTDI chip, which can be used to manipulate the reset and recovery lines.

  2. Using LibFTDI or D2XX: You can use libraries like LibFTDI or the proprietary D2XX driver to write a script or application that toggles the necessary pins. This would involve identifying which pins on the FTDI chip correspond to the reset and recovery lines on your board.

  3. Script Automation: Once you have identified the correct pins, you can automate the process using a script. This script can be written in a language that supports FTDI libraries, such as Python or C/C++.

  4. Testing: After setting up your script, test it to ensure that it correctly triggers the reset and recovery modes as expected.

This approach should help you manage the reset and recovery lines for automated UUU loading. If you need more specific guidance, exploring FTDI’s documentation or community forums might provide additional insights.

I hope this helps! If you have any more questions, feel free to ask.

Best regards,
Toradex AI Assistant.

3

Hey Matthew,

If I understand correctly, you are asking if there is a software only way of getting the SoM + Carrier board into recovery mode to flash a new image? I believe this answer to be no. Because this pin needs to be driven to ground while UUU loads u-boot, there isn’t a way to ensure this is drawn to ground by the software prior to the software itself being loaded.

Eric Singer
Toradex