Edge Impulse firmware for ST B-L475E-IOT01A

Edge Impulse enables developers to create the next generation of intelligent device solutions with embedded Machine Learning. This repository contains the Edge Impulse firmware for the ST B-L475E-IOT01A development board. This device supports all Edge Impulse device features, including ingestion, remote management and inferencing.

Note: Do you just want to use this development board with Edge Impulse? No need to build this firmware. See the instructions here for a prebuilt image and instructions. Or, you can use the data forwarder to capture data from any sensor.

Requirements

Hardware

• DISCO-L475VG-IOT01A development board.

Software

• Node.js 10.16 or higher.

• Git - make sure git is in your PATH.

• Mercurial - make sure hg is in your PATH.

• GNU ARM Embedded Toolchain 9-2019-q4-major.

• STLink tools.

  Installation via Homebrew is the easiest:

  $ brew install stlink
  

• Mbed CLI.

  Installation via pip is the easiest:

  $ pip install mbed-cli
  

Unpack the GNU ARM Embedded Toolchain, and configure Mbed CLI to use it via:

$ mbed config -G GCC_ARM_PATH ~/toolchains/gcc-arm-none-eabi-9-2019-q4-major/bin/
$ mbed config -G TOOLCHAIN GCC_ARM
$ mbed config -G PROTOCOL SSH

Building the device firmware

1. Clone this repository:

   $ git clone https://github.com/edgeimpulse/firmware-st-b-l475e-iot01a
   

2. Update dependencies:

   $ mbed deploy
   

3. Fix an outdated file in the mbed-os dependency:

   cp source/edge-impulse-sdk/CMSIS/Core/Include/cmsis_gcc.h mbed-os/cmsis/TARGET_CORTEX_M/cmsis_gcc.h
   

4. Build and flash this project:

   $ mbed compile -t GCC_ARM -m DISCO_L475VG_IOT01A --profile=debug -f
   

5. Attach a serial monitor to the board on baud rate 115,200 to see the output.

   On macOS you can use Serial.app (recommended!) or connect via screen:

   1. Find the handle for your board:

      $ ls /dev/tty.usbm*
      /dev/tty.usbmodem401203
      

   2. Then connect via:

      $ screen /dev/tty.usbmodem401203 115200
      

   3. To exit, press: CTRL+A then CTRL+\ then press y.

Debugging through Visual Studio Code

1. Install STLink:

   $ brew install stlink
   

2. Install mbed-vscode-generator:

   $ npm install mbed-vscode-generator -g
   

3. Generate the debugger files (run from the root folder of this project, not from the firmware folder):

   $ mbed-vscode-generator -i firmware/ -o .vscode/ --debugger stlink
   

4. Just press 'Run' in Visual Studio Code to build and debug.

If the debugger does not properly detach, run killall st-util.