UsbX Device Controllers Driver

Nexus76 · ‎02-15-2023

Hi, I'm trying UsbX example with MCUXpresso IMXRT1170, I have imported the "evkmimxrt1170_usbx_device_composite_cdc_acm_cdc_acm"

so I'd like to understand the files presents into project directory "azure-rtos\usbx\usbx_device_controllers".

Here I have found files _ux_dcd_mcimx6_..... (USBX Component MCIMX6 Controller Driver), but in other SDK example there is _ux_dcd_nxp_.... (USBX Component NXP_DCI Controller Driver).

I don't find anyware these files surfing internet, but only in SDK.

The SDK project "evkmimxrt1170_usbx_lib" doesn't include the directory usbx_device_controllers !?!

It's my interest to understand where I find this files and how to use them.

Best regards

diego_charles · ‎02-16-2023

Hi @Nexus76

I hope you are doing well! Sorry for not reaching you out sooner.

Imported latest SDK 2.13, and I confirm the USBX library does not contain usbx_device_controllers folder.

The files contained in azure-rtos\usbx\usbx_device_controllers are adapted by Microsoft and some of them make reference to our SDK APIs.

diego_charles_2-1676587132104.png

So you should be able to find some documentation in:

https://learn.microsoft.com/en-us/azure/rtos/usbx/usbx-device-stack-about for USBX lib.
RT1170 SDK, see path: docs\USB\ for NXP USB stack information.

According to the AzureRTOS USBx (link above) user guide the drivers you are refering to are:

diego_charles_3-1676588085905.png

Each header for the NXP USB device controller is minimally commented by MSFT. And each function driver may point to our stack implementation.

I am sorry for not having more information to share at this time!

Let me know if there is any open point.

Diego