FAQs/Howtos

This howto section describes some basic procedures on a running EVAcharge SE device.

USB recovery mode

The USB recovery mode is activated when:

  • EVAcharge SE is powered on without a bootable image in the eMMC
  • Boot selector jumpers (JP6, JP7) are configured for USB

Note: During USB recovery mode the i.MX28 attached LEDs are off.

Flashing

The eMMC flash can be programmed via NXP’s Manufacturing Tool MfgTool (registration required). This uses the USB recovery mode of the i.MX28. In this mode the MfgTool transfers a small piece of software into i.MX28’s RAM, which is capable to access the device’s eMMC flash.

Requirements:

  • Windows(tm) PC with USB 2.0 interface
  • NXP MfgTool 1 for i.MX28

Note: USB 3.0 isn’t supported by MfgTool

Required steps:

  • Extract the ZIP archive with the Linux image
  • Copy the complete EVAcharge directory (e.g. EVAcharge) into NXP MfgTool Profile directory (<MfgToolInstallDir>/Profiles)
  • Configure EVAcharge SE in USB recovery mode
  • Power the EVAcharge SE with 12 V
  • Connect the Windows PC with the EVAcharge SE via a USB-A-Male to USB-A-Male cable (at first time this triggers a driver installation)
  • Start MfgTool
  • Press the button “Scan devices”
  • After the EVAcharge SE has been found the button on the right should be named as “Start” and green
  • Select the profile (is the same as the directory name copied above) which should be flashed via the drop-down list
  • Now press the button “Start” and wait until the writing process has been finished
  • Finally press the button “Stop” and disconnect the EVAcharge SE from USB and power
  • Before using the EVAcharge SE the boot selector jumpers must configured for eMMC again

Ethernet Bridging

It’s possible to use the EVAcharge SE as an Ethernet to Powerline bridge.

In order to setup a bridge automatically during boot then follow these steps:

  • boot up EVAcharge SE and log in via Debug UART

  • rename the existing network configuration:

    mv /etc/network/interfaces /etc/network/interfaces.orig

  • create a new /etc/network/interfaces with the following content:

    source /etc/network/interfaces.d/*

auto lo br0
iface lo inet loopback

iface eth0 inet manual
iface eth1 inet manual

# Bridge setup
iface br0 inet static
  bridge_ports eth0 eth1
  bridge_maxwait 2
  address 192.168.37.250
  netmask 255.255.255.0
  post-up /sbin/brctl setfd br0 0

  • finally restart the network interfaces:

    /etc/init.d/networking restart