⚡️ TI AM62x EVSE SDK MEETS UW Tacoma! 🔌

Organization of this repository

The repository contains multiple independent branches

• main:

  this branch contains the software for the AM62x MCU in the firmware folder and its board support driver for the EVerest framework in the everest-module folder

• kirkstone:

  this branch contains the OpenEmbedded layer, which is necessary for building a system image containing all the necessary software and drivers in order to run a charging station

• repo-manifest:

  this branch contains a manifest for the repo and specifies other necessary layer dependencies

Building the system image

This section assumes, that you have minimal experience using the OpenEmbedded framework.

• install repo (see https://gerrit.googlesource.com/git-repo/)

• use repo to fetch all layers:

  repo init -u https://github.com/phytec-labs/uw-am62x-evse-sdk.git -b repo-manifest
  
  repo sync
  # will fetch all repositories

• source the open-embedded environment script:

  # do this in the folder, where you ran repo init
  . poky/oe-init-build-env
  #^- note the space

• to setup the neccessary bitbake layers, replace the file build/conf/bblayers.conf with the following content:

  # POKY_BBLAYERS_CONF_VERSION is increased each time build/conf/bblayers.conf
  # changes incompatibly
  POKY_BBLAYERS_CONF_VERSION = "2"
  
  BBPATH = "${TOPDIR}"
  BBFILES ?= ""
  
  BSPDIR := "${@os.path.abspath(os.path.dirname(d.getVar('FILE', True)) + '/../..')}"
  
  BBLAYERS ?= " \
    ${BSPDIR}/poky/meta \
    ${BSPDIR}/poky/meta-poky \
    ${BSPDIR}/poky/meta-yocto-bsp \
    ${BSPDIR}/meta-arm/meta-arm \
    ${BSPDIR}/meta-arm/meta-arm-toolchain \
    ${BSPDIR}/meta-ti/meta-ti-bsp \
    ${BSPDIR}/meta-ti/meta-ti-extras \
    ${BSPDIR}/meta-ti-evse \
    ${BSPDIR}/meta-everest \
    ${BSPDIR}/meta-flutter \
    ${BSPDIR}/meta-openembedded/meta-oe \
    ${BSPDIR}/meta-openembedded/meta-python \
    ${BSPDIR}/meta-openembedded/meta-networking \
    ${BSPDIR}/meta-clang \
    ${BSPDIR}/meta-evergreen \
    "

• edit the file build/conf/local.conf and replace MACHINE setting with:

  MACHINE ??= "phyboard-lyra-am62xx"

  and append the following lines at the end:

  DISTRO_FEATURES:append = " systemd"
  DISTRO_FEATURES_BACKFILL_CONSIDERED += "sysvinit"
  VIRTUAL-RUNTIME_init_manager = "systemd"
  VIRTUAL-RUNTIME_initscripts = "systemd-compat-units"

• finally build the ti-evse-image:

  bitbake ti-evse-image

• after the image is complete, you can write it to a sd-card:

  xzcat build/tmp/deploy/images/phyboard-lyra-am62xx/ti-evse-image-phyboard-lyra-am62xx.wic.xz | sudo dd of=/dev/sdX bs=4M status=progress; sudo sync

• now you are ready to insert the sd card into the AM62x EVM and boot it as described here

If you have a complete Charging development kit you should now be ready to charge a car! By default Basic PWM charging is enabled. EVerest can be configured with the config files found in /etc/everest to e.g. change the maximum current, enable OCPP or enable ISO15118-2 AC charging.

Contact Pionix at contact at pionix.com to learn more about EVerest and ISO15118-2 options without Java!

Building the MCU firmware

Note: this is only necessary if you want to modify the MCU firmware. A recent binary of the firmware is already included in the image.

1.

Install CCStudio and follow its setup instructions. Furthermore you'll need to install the AM62x MCU+ SDK. Look here for instructions on how to do that.

2. Checkout out the MCU firmware from this repository:

   git clone https://github.com/phytec-labs/uw-am62x-evse-sdk.git

3. Start CCStudio and import the firmware folder from the checkout via File->Import... (choose CCS Projects)
4. Now you should be ready to modify and compile the firmware. For instructions on how to load and unload the firmware, you might find what you are looking for here.