Edgi_Talk_M55_USB_UVC CherryUSB Example Project

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Overview

This project runs on the Edgi-Talk M55 core and enables CherryUSB host mode on the Infineon DWC2 controller, with USB Video Class (UVC) host support enabled by default.

At startup, firmware calls usbh_initialize(0, USBHS_BASE, NULL) to bring up USB host. The main loop toggles the green LED (P16_6) as a liveness indicator.

Default Configuration

Key macros in rtconfig.h:

  • RT_USING_CHERRYUSB = y

  • RT_CHERRYUSB_HOST = y

  • RT_CHERRYUSB_HOST_DWC2_INFINEON = y

  • RT_CHERRYUSB_HOST_MSC = y

  • RT_CHERRYUSB_HOST_VIDEO = y

This gives a ready baseline for UVC device enumeration and further video application integration.

Build and Flash

  1. Build in RT-Thread Studio or with SCons.

  2. Flash firmware via KitProg3 (DAP).

  3. Connect a UVC camera (or other USB device) to the Type-C port.

Configuration

Open RT-Thread Studio:

RT-Thread Settings -> USB -> CherryUSB

Recommended checks:

  • Enable RT_CHERRYUSB_HOST

  • Select RT_CHERRYUSB_HOST_DWC2_INFINEON as host IP

  • Enable RT_CHERRYUSB_HOST_VIDEO for UVC

  • Keep or disable MSC and other host classes as needed

If extra USB parameters are needed, edit:

  • libraries/Common/board/ports/usb/usb_config.h

Runtime Result

  1. Plug a USB camera into the board’s USB-OTG interface.

../../../_images/USB-Connect.png

  1. After boot, the system automatically detects camera capabilities (resolution, format, and related information).

../../../_images/usb-uvc.png

  1. In the MSH terminal, run usbh_uvc_start 0 320 240 (0 = YUYV, 1 = MJPEG, resolution 320x240).

Note: Select parameters based on your USB camera’s actual supported modes. The maximum supported resolution is only 432x240.

../../../_images/usb-lcd.png

  1. Check the serial log output. Frame-rate information is printed once per second.

Startup Sequence

The M55 core depends on the M33 boot flow. Recommended flashing order:

+------------------+
|   Secure M33     |
|  (Secure Core)   |
+------------------+
          |
          v
+------------------+
|       M33        |
| (Non-Secure Core)|
+------------------+
          |
          v
+-------------------+
|       M55         |
| (Application Core)|
+-------------------+

Notes

Note: RT-Thread Studio 2.2.9 or newer is recommended.

  • If this M55 project does not run, flash Edgi_Talk_M33_Blink_LED first.

  • Enable CM55 in the M33 project:

    RT-Thread Settings -> Hardware -> select SOC Multi Core Mode -> Enable CM55 Core

config