Edgi_Talk_USB_Deepcraft Example Project

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Overview

This project runs on the Edgi-Talk M55 core and bridges onboard sensors to host tools over CherryUSB Device CDC ACM using a Protocol Buffers (nanopb) based streaming protocol.

At startup, firmware:

  1. Creates a protocol context (protocol_create) with a board UUID.

  2. Registers device drivers (currently microphone and LSM6DS3 IMU).

  3. Initializes USB CDC device transport.

  4. Enters a request-processing loop via protocol_process_request.

Default Configuration

Key macros in rtconfig.h:

  • RT_USING_CHERRYUSB = y

  • RT_CHERRYUSB_DEVICE = y

  • RT_CHERRYUSB_DEVICE_DWC2_INFINEON = y

  • RT_CHERRYUSB_DEVICE_CDC_ACM = y

  • RT_CHERRYUSB_DEVICE_TEMPLATE_CDC_ACM = y

USB identity from applications/deepcraft/deepcraft_usbd.c:

  • VID: 0x058B

  • PID: 0x027D

  • Product string: Imagimob Streaming Device

Integrated Device Capabilities

system_load_device_drivers() currently registers:

  • Microphone (PDM/PCM)

    • Options: gain, mono/stereo, sample frequency

    • Stream type: S16 output stream

  • LSM6DS3 IMU

    • Options: sample rate, accel range, gyro range, stream mode

    • Modes: Combined / Split / Only Accel / Only Gyro

Build and Flash

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

  2. Flash firmware via KitProg3 (DAP).

  3. Connect the board to host through Type-C and wait for CDC enumeration.

On successful startup, UART prints:

  • deepcraft: ready, waiting for host commands.

Deepcraft Studio Usage

  1. Download and install Deepcraft Studio: Install & Download Studio

  2. Create a blank project: Real-Time Data Streaming with PSOC Edge E84 HMI

  3. Connect the board to your PC with a USB data cable, then verify the device appears in Deepcraft Studio.

  1. Click the build/run option to enter the data collection window.

  1. Start recording and verify microphone plus 3-axis IMU data are streamed in real time.

For more tutorials, see: Data Collection Microphone

Host Communication Notes

  • Transport: USB CDC ACM

  • Encoding: nanopb / protobuf

  • Error recovery:

    • If request decode fails (PROTOCOL_STATUS_FAILED_TO_DECODE_REQUEST), firmware calls deepcraft_usbd_resync_rx() to clear and resync the RX ring buffer.

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