EFlasher

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1 Introduction to eFlasher

The eFlasher (eMMC-flasher) utility is released by FriendlyElec for users to install an OS image on a FriendlyElec board's eMMC easily.
The eFlasher utility provides users with a GUI with multiple OS options.
The eFlasher utility has two versions: eflasher-gui and eflasher-console:
1) eflasher-gui: a GUI based eFlasher utility. When a board is connected to an LCD or HDMI monitor users can use this utility to install an OS easily;
2) eflasher-console: a commandline based eFlasher utility. When a board is connected to a serial terminal or logged in with SSH users can use it to install an OS;

2 Install eFlasher

  • Step 1: download an eflasher installation package

Go to the wiki page of the nano board you bought and download an eflasher file named as :XXXX-eflasher-YYYYMMDD-full.img.7z(the "XXXX" is the board type for the board you bought and "YYYYMMDD" is the release date of that eflasher file)
This package contains all the image files released by FriendlyElec such as Debian, Android5, Android4.4 and Ubuntu core(different boards may be provided with different OS image files)
Download a XXXX-eflasher-YYYYMMDD-full.img.7z file to a PC host and make an installation SD card with a windows utility: win32diskimager.rar

  • Step 2: make an installation SD card with eflasher

Extract the eflasher file and you will get an ".img" file.Insert an SD card(at least 8G) into a Windows PC and run the win32diskimager utility as administrator. On the utility's main window select your SD card's drive, the wanted image file and click on "write" to start flashing the SD card.
You can use "dd" under a Linux PC to flash this ".img" to your SD card too

  • Step 3: Start eFlasher

Insert this SD card to your board, press and hold the "BOOT" button, power on your board.

3 GUI Based eFlasher

By default after eFlash is started the GUI based version will be started. If your board is connected to an LCD or HDMI monitor you will see the following screen:

Eflasher-gui

Select your wanted OS to start installation.

4 Commandline Based eFlasher

If your board is not connected to any display device you can login your board via SSH and start the eflahser by running "eflasher". Here is what you expect to observe:

Eflasher-console


5 Automate OS Installation at System Startup

You can automate OS installation with eFlash at system startup in three ways:

  • No.1:on the GUI based eFlasher select your wanted OS and check the "Start automatically at startup" option on the "Ready to Go" window.
  • No.2:mount an SD card to a Windows PC and create an "eflasher.conf" file with notepad on the FAT section of your SD card(or open an existing "eflasher.conf") and type the following lines if you want to install a Debian OS:
[General]
autoStart=/mnt/sdcard/debian

The "autoStart" field specifies the path to your ROM. In this example the ROM is a Debian OS image file.

  • No.3:after your board starts open a terminal and create or edit "/mnt/sdcard/eflasher.conf" and type the lines presented in No.2 .

6 Make Your Own eFlasher

6.1 Manage Multiple OS Images with eFlasher

The eFlasher utility reads image files from the FAT section of an SD card. After an SD card is inserted to a Windows PC you can manage multiple OS images that exist in the SD card with eFlasher.
Under the FAT section of an SD card with multiple OS images each directory under the root directory contains an OS image. The name of such a directory should be named with letters or numbers
If the FAT section is not big enough to hold your multiple OS images you can store them in a USB drive with the same structure
For example there are four directories under the FAT section:
Eflasher-folder
They stand for four OS:
Eflasher-oslist

Files under an OS directory:
Configuration File:

env.conf environmental variables for setting up uboot and kernel parameters
info.conf system information:

title=Android 5 ---> OS name: Android 5
require-board=s5p4418 ---> SoC: S5P4418, options including S5P6818, H3, A64 etc
version=2016-11-17 ---> ROM's version number(or release date)
icon=androidos.png ---> icon
Here is a screenshot:
Eflasher-infoconf

Image File:

2ndboot.bin Second Boot
boot.img image file for boot section
bootloader U-Boot
cache.img image file for Android Cache section
system.img image file for system section
userdata.img image file for user data section
partmap.txt description file for partition map

These image files by default are included in an eFlasher file. These files can be downloaded from a board's corresponding wiki site. Usually an image file is located at the images-for-eflasher directory of a server. Here is how a S5P6818's directory looks like:

EImages-for-eflasher.png

You can download its image file and extract it to the FAT section of an SD card.

6.2 Make eflasher File with Your OS

Note: this only applies for 4418 and 6818 based boards
Here are the steps for making an eFlasher card with UbuntuCore for 4418 based boards:

git clone https://github.com/friendlyarm/sd-fuse_nanopi2.git
cd sd-fuse_nanopi2
sudo ./mkimage.sh eflasher
DEV=`sudo losetup -f`
sudo losetup ${DEV} s5p4418-eflasher-sd8g-$(date +%Y%m%d).img

If you make an eflasher card for 6818 based boards you need to change "sd-fuse_nanopi2.git" to "sd-fuse_nanopi3.git" and rename "s5p4418" to "s6p6818".

After these commands are successfully run an eflasher image named "s5p4418-eflasher-sd8g-YYYYMMDD.img" will be generated. But this image doesn't contain an OS file. Running the following commands will generate a UbuntuCore image file. You can use your OS image's file name to replace the "core-qte-images.tfz" to the following commands to insert your OS to the eflasher file: 

sudo partprobe ${DEV}
sudo mkfs.vfat ${DEV}p1 -n FRIENDLYARM
sudo mkdir -p /mnt/fat
sudo mount -t vfat ${DEV}p1 /mnt/fat
sudo wget -qO- http://112.124.9.243/dvdfiles/S5P4418/images-for-eflasher/core-qte-images.tgz | tar xvz -C /mnt/fat
sudo umount /mnt/fat
sudo losetup -d ${DEV}

For 6818 based boards change "http://112.124.9.243/dvdfiles/S5P4418" to "http://112.124.9.243/dvdfiles/S5P6818".

After these commands are successfully run an "s5p4418-eflasher-sd8g-YYYYMMDD.img" file with a Ubuntu core OS image will be generated. You can use the "dd" command to flash it to an SD card and flash your OS to your board's eMMC.

6.3 Make Your Own OS Image

6.3.1 Make Android Image for 4418/6818

First of all you need to compile your Android source code. After compilation is finished enter the "out/target/product/XXXXX" directory ("XXXXX" stands for a product's name. For example 4418 SoC's name is "nanopi2" and 6818 SoC's name is "nanopi3") and replace the following file with the one under the Android directory of the FAT section of your SD card:

Eflasher-replace-files.png


7 Update Log

7.1 July-26-2017

  • Released English Version

7.2 August-22-2017

  • Added section 6.2

7.3 March-10-2018

  • Updated sections 6.2 and 6.3
Retrieved from "https://wiki.friendlyelec.com/wiki/index.php?title=EFlasher&oldid=13486"