LP-AM243: USB DFU Configuration with no USB C PD Port

Hi Broydon,

If you have a USB 3.0 or 3.1 connector on your PC, you can buy a USB hub which has a USB C connector. Connect the USB hub to your PC and the USB C to your EVM. It should fix your problem.

Best regards,

Ming

Ming,

- thank you for the prompt reply

- your suggestion is the path I have been trying to take

- my PC has USB 3.0 connectors

- I bought a hub (Anker 332) last night to attempt to resolve this issue

- the hub has a USB C power in port (connected to 5V 20W wall adapter), a pass through male USB C cable, a USB C data port, and several USB 3.0 ports

- I can power the LaunchPad when the hub is connected to my 5V 20W USB C wall adapter and the board connected to the pass through cable

- i cannot power the LaunchPad when the hub is connected to my 5V 20W USB C wall adapter and the board connected to the USB C port, which is to be expected since the port is not power delivery capable

- in this configuration, I still cannot see the LaunchPad in Zadig when connecting my laptop to the USB 3.0 port on the hub

- I am having trouble finding a USB 3.0 hub that also features USB C with power delivery @ 5V/3A

- can I power the board through one of the 5V pins on the J1 or J2 headers and use the USB C connection between PC and LaunchPad only for data?

Thanks
Broydon

Hi Broydon,

My guess the 5V power from J1 or J2 will not work, because of the power up sequence has to be in place. I will forward your thread to a HW expert for further help.

Best regards,

Ming

Hi Broydon, 

For typical benchtop usage, you can power the board from a USB-C AC/DC 5V/3A converter. 

In the LP-AM243 User's Guide (https://www.ti.com/lit/ug/spruj12f/spruj12f.pdf) in the "Important Notices" section we included a note about possible, specific AC/DC converter models that can be used with the board. There are many options from many distributors, but that is a start. 

The board does require that the Type-C cable provide the proper CC1/CC2 enumeration voltage states to indicate that the supply is advertising 5V/3A operation. 

The LP-AM243 does not support receiving power over the 5V BoosterPack pins, only delivering it to attached BoosterPack boards. 

Please let me know if that helps. 

-Randy

Randy,

- apologies for the delay in reply, I have been away from this problem for a bit

- I can provide the proper power to the board for typical operation; however there is one step of the setup guide (section 'download, install and setup sdk and tools', subsection 'steps to install windows generic usb drivers') which requires me to install drivers from the launchpad to my workstation through the USB-C connector

- my workstation does not have USB C power delivery capabilities

- I have tried going through USB hubs in MANY configurations, but can never seem to find the 'AM64x DFU' device through the Zadig tool

- my most recent attempt was to get a USB C breakout board and force the CC lines to advertise 5V/3A

- this configuration powers the launchpad up properly (LD9 blinks once, LD6-8 on continuously afterward)

- however, I STILL cannot see the board through the Zadig tool

- are these drivers available from TI as opposed to having to install them from the launchpad? that would allow me to continue on with development past this roadblock

- this step is required to continue through the EVM Setup section of the Getting Started guide, as I cannot install the SBL DFU drivers that are required to run the SOC initialization binary

- these questions may be more appropriate for Ming at this point, as I have managed to connect the board to my workstation and get the LEDs in the correct configuration, however I am unable to install the 'windows generic USB drivers' and the drivers for using 'SBL DFU'

Thanks again for the help

Broydon