i.MX EasyEVSE MPU Meta Layer

This repository holds the needed additional configuration to prepare the i.MX Linux BSP and build the i.MX EasyEVSE Linux demo.

Yocto Image

The following instructions are abbreviated. Please consult the i.MX Linux Yocto Project User's Guide for specific details.

• Default Build

  repo init -u https://github.com/nxp-imx-support/nxp-easyevse-mpu-manifest.git -b release/easyevse-mpu-2.0 -m imx-6.1.55-2.2.0_evse.xml
  repo sync

• Download the Plug & Trust Middleware (04.05.00)

  • Login to NXP.com and download the EdgeLock SE05x Plug & Trust Middleware 04.05.00
  • Copy the downloaded se05x_mw_v04.05.00.zip file to the directory where you ran repo sync above.

• Build the Image

  DISTRO=fsl-imx-wayland MACHINE=imx93evk-easyevse . imx-setup-easyevse.sh -b imx93 -r humble
  bitbake imx-image-easyevse

Note: The image is configured by default for use with the LVDS display (DY1212W-4856).

• Optional: To use the older MIPI-DSI display (MX8-DSI-OLED1A), disable LVDS display support before the final build step from above.

  echo 'DISTRO_FEATURES:remove = "LVDS_DISPLAY_SUPPORT"' >> conf/local.conf
  bitbake imx-image-easyevse

• Optional: Disable SE050 authentication in the ISO 15118 stack before the final build step from above.

  echo 'FEATPROD_PKCS11_SUPPORTED ?= "OFF"' >> conf/local.conf
  bitbake imx-image-easyevse

• Install the image to eMMC or SDCard

  The same image shall be flashed to both the EVSE and EV boards.

  Consult the i.MX Linux User's Guide for details connecting to and flashing the system image on the boards.

  • Configure the board to boot in "Download mode"

  • Flash the imx-image-easyevse WIC image compiled above. E.g., using UUU:

    cd tmp/deploy/images/imx93evk-easyevse
    uuu -b emmc_all imx-boot imx-image-easyevse-imx93evk-easyevse.wic.zst

  • Boot the image on eMMC or SDCard

Provisioning the SE050

Provisioning the SE050 is only necessary once.

• Make sure the SE050 is plugged and working

  OPENSSL_CONF=/etc/ssl/openssl11_sss_se050.cnf nxp_iot_agent_demo
  se05x_GetInfo

• Run provision script

  cd ~/res/se05x/
  ./provision.sh

Clearing the SE050

In certain cases, the SE050 memory may need to be purged and then re-provisioned.

• Configure the ssscli tool

  cd /opt/ssscli
  pip3 uninstall cryptography
  pip3 install 'cryptography<38'
  python3 setup.py develop

• Connect to the SE050 and clear its internal memory

  cd ~
  ssscli connect se05x t1oi2c /dev/i2c-0:0x48
  ssscli se05x reset

• Re-provision the SE050 as instructed above

If you continue to experience difficulties, it might be necessary to unassign your SE050 device at edgelock2go.com and reassign it to the device group within the EdgeLock 2GO platform.

Wi-Fi Configuration

Both connection to a typical Access Point (AP) via the mlan0 interface Wi-Fi Direct (WFD) via the wfd0 interface and can be used. Please refer to the i.MX Linux Reference Manual and NXP Wireless SoC Features and Release Notes for Linux for specific Wi-Fi details.

Connection to an AP uses the mlan0 interfaces. Wi-Fi Direct uses the wfd0 interface.

• Edit the /etc/wpa_supplicant/wpa_supplicant-interface.conf file, choosing the appropriate mlan0 or wfd0 for interface.

  ctrl_interface=/var/run/wpa_supplicant
  ctrl_interface_group=0
  update_config=1
  ap_scan=1
  
  network={
  	key_mgmt=WPA-PSK
  	ssid="NAME-OF-YOUR-NETWORK"
  	psk="PASSWORD"
  }
  

• Enable the systemd wpa_supplicant@interface service to start on next boot and, optionally, start it immediately. Again, choose mlan0 or wfd0 as appropriate for the interface name. E.g.,

  • AP:

    systemctl enable wpa_supplicant@mlan0
    systemctl start wpa_supplicant@mlan0

  • WFD:

    systemctl enable wpa_supplicant@wfd0
    systemctl start wpa_supplicant@wfd0

Preparing the ROS demos

Configure the cloud.conf file with your credentials (consult the EasyEVSE User Guide). This is necessary only on the EVSE system.

• EVSE

  cp .nxp-easyevse/cloud.conf ./
  vi cloud.conf

Run the Demo

• EVSE

  .nxp-easyevse/evse-startup.sh all

• EV

  ./stx_pev_eth

Dependencies

• meta-imx: https://github.com/nxp-imx/meta-imx/
• meta-iot-cloud: https://github.com/intel-iot-devkit/meta-iot-cloud
• nxp-easyevse-mpu: https://github.com/nxp-imx-support/nxp-easyevse-mpu

Supported Boards

• NXP i.MX 93 EVK (imx93evk)

Releases

Releases are tracked against the i.MX Linux software releases. Supported releases are listed below.

• Mickledore
  • 6.1.55_2.2.0

Reference

• i.MX Linux Yocto Project User's Guide
• i.MX Linux User's Guide
• EdgeLock SE05x Plug & Trust Middleware 04.05.00