Colorfly e708q1

= Identification = On the back of the device, the following is printed: E708 Q1 5.0V ⎓ 2.0 A Wi-Fi Colorfly GmbH
 * (Colorfly)
 * 7" TABLET PC

= Tips, Tricks, Caveats =

Boot from SDCard mode
How to prepare and Boot from MicroUSB:

1.Zero the beginning of the SD card: dd if=/dev/zero of=/dev/sdX bs=1M count=8

2.Start fdisk to partition the SD card: 2.1-fdisk /dev/sdX At the fdisk prompt, delete old partitions and create a new one: Type o. This will clear out any partitions on the drive. Type p to list partitions. There should be no partitions left. Now type n, then p for primary, 1 for the first partition on the drive, 2048 for the first sector, and then press ENTER to accept the default last sector. Write the partition table and exit by typing w.     2.2-Create and mount the ext4 filesystem: mkfs.ext4 /dev/sdX1 mkdir mnt mount /dev/sdX1 mnt 2.3-Download and extract the root filesystem (for example, arch linux): wget http://os.archlinuxarm.org/os/ArchLinuxARM-armv7-latest.tar.gz         bsdtar -xpf ArchLinuxARM-armv7-latest.tar.gz -C /mnt sync umount /mnt 3.Install the U-Boot bootloader:

Download git form denx.de: Edit sun6i-a31s-colorfly-e708-q1.dts to enable axp22x battery poweb: At the end of file add: &axp22x { backup = ;  }; Next how to compile U-Boot: 1-Configure u.boot for colorfly e708 make CROSS_COMPILE=arm-linux-gnueabihf- colorfly_e708_q1_defconfig 2-If necessary configure sources: make CROSS_COMPILE=arm-linux-gnueabihf- menuconfig 3-Compile u-Boot make CROSS_COMPILE=arm-linux-gnueabihf- 4-Install U-BOOT on MicroSD boot sectors: dd if=u-boot-sunxi-with-spl.bin of=/dev/sdb bs=1024 seek=8 5-Copy sun6i-a31s-colorfly-e708-q1.dtb (from ./arch/arm/dts/sun6i-a31s-colorfly-e708-q1.dtb) to /mnt/boot (partition /dev/sdb1)

4.boot.scr -boot.scr 1.mount /dev/sdb1 /mnt/ 2.boot.cmd (source): part uuid ${devtype} ${devnum}:${bootpart} uuid setenv bootargs console=${console} root=PARTUUID=${uuid} rw rootwait if load ${devtype} ${devnum}:${bootpart} ${kernel_addr_r} /boot/zImage; then if load ${devtype} ${devnum}:${bootpart} ${fdt_addr_r} /boot/dtbs/${fdtfile}; then if load ${devtype} ${devnum}:${bootpart} ${ramdisk_addr_r} /boot/initramfs-linux.img; then bootz ${kernel_addr_r} ${ramdisk_addr_r}:${filesize} ${fdt_addr_r}; else bootz ${kernel_addr_r} - ${fdt_addr_r}; fi; fi; fi                                   3.compile boot.cmd: mkimage -C none -A arm -T script -d boot.cmd boot.scr 4. Copy boot.scr to /mnt/boot cp boot.scr /mnt/boot 5. Umount /mnt sync umount /mnt

5. How to compile linux kernel 

Compile zImage with this options :

Download kernel: git clone git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git

1.Prepare compile kernel to suni allwinner: make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- sunxi_defconfig 2.Modify kernel propertiers(menu config): make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- menuconfig 2.1Kernel options (menu config) you can select this as modules(M): Wifi: 1-Networking support -->Wireless -->Cfg80211 2-Device drivers -->Network Device Support-->wireles Lan 3-Device drivers -->Staging drivers--> RTL8188 TouchScreen: -Device drivers -->Imput devices---> Goodix 911 OTG, filesystem (NTFS, DOS)..: 1-Device drivers -->USB suport---> Otg, Mass storage, etc.. 2-File systems--> NTFS, VFAT... 3.Compile Kernel: ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- make zImage (copy to microsd partitrion, in my case sdb1 (vfat) de ./arch/arm/boot/zImage to /mnt/boot/zImage) 4.Install Modules: mount second microsd partition to /mnt (mount /dev/sdb2 /mnt) ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- INSTALL_MOD_PATH=/mnt  make modules modules_install Now we have new modules in /mnt/lib/modules/4.6.0-rc2/... 5-Sync and umount /mnt: sync umount /mnt NOTE: In order to test battery status and charge (at now not soported at mailine kernel)download a modificied mainline kernel from https://github.com/micile/linux-sunxi/tree/AXP_Battery and compile zImage and modules witch sunxi_defconfig options. Insert the micro SD card into the colorfly e708 and apply 5V power. The default root password is root.

6. In order to calibrate touch screen, X11: 6.1. Edit 10-evdev.conf vim /usr/share/X11/xorg.conf.d/10-evdev.conf 6.2. Add this lines: Section "InputClass" Identifier     "calibration" MatchProduct   "Goodix Capacitive TouchScreen" Option "Calibration"   "4 1200 800 -1" Option "SwapAxes"      "1" EndSection


 * Devices on boad:

Bus 001 Device 002: ID 0bda:0179 Realtek Semiconductor Corp. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 * 1) lsusb

processor      : 0 model name     : ARMv7 Processor rev 3 (v7l) BogoMIPS       : 48.00 Features       : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm CPU implementer : 0x41 CPU architecture: 7 CPU variant    : 0x0 CPU part       : 0xc07 CPU revision   : 3
 * Info about CPU "cat /proc/cpuinfo"

processor      : 1 model name     : ARMv7 Processor rev 3 (v7l) BogoMIPS       : 48.00 Features       : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm CPU implementer : 0x41 CPU architecture: 7 CPU variant    : 0x0 CPU part       : 0xc07 CPU revision   : 3

processor      : 2 model name     : ARMv7 Processor rev 3 (v7l) BogoMIPS       : 48.00 Features       : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm CPU implementer : 0x41 CPU architecture: 7 CPU variant    : 0x0 CPU part       : 0xc07 CPU revision   : 3

processor      : 3 model name     : ARMv7 Processor rev 3 (v7l) BogoMIPS       : 48.00 Features       : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm CPU implementer : 0x41 CPU architecture: 7 CPU variant    : 0x0 CPU part       : 0xc07 CPU revision   : 3

Hardware       : Allwinner sun6i (A31) Family Revision       : 0000 Serial         : 16524251080XXXXX

ADB
This device does not have root access enabled by default. If USB debugging is enabled in settings on the tablet, run

echo -e '0x1f3a\n0x1002' >> .android/adb_usb.ini sudo bash -c 'echo SUBSYSTEM==\"usb\", ATTR{idVendor}==\"1f3a\", ATTRS{idProduct}==\"1002\", MODE=\"0666\", \ GROUP=\"plugdev\", SYMLINK+=\"android%n\" >> /etc/udev/rules.d/51-android.rules' udevadm control --reload-rules

in order to make

adb devices adb shell ..

work.

Recovery mode

 * 1) Power off the device
 * 2) Hold down the vol+ button
 * 3) Power on the device
 * 4) Release the vol+ button when recovery starts

= Device disassembly (voids warranty)=

The back cover uses snap-ins, but sits very tight on the front frame. Where the volume and power buttons sit, the plastic is so thin that it's very likely to break, when trying to remove the back cover. To start opening, be sure to pick a spot about one mm below the display at a place where no buttons or connection holes are situated. Remember that you will loose warranty doing this with most vendors.

Adding a serial port
Howto needed: Does the N7 Pro serial port guide to add a serial port work for this device too!?

= Pictures =

= Also known as =


 * Unofficial:
 * Since there are no firmware files publicly available to this date from Intenso, I've tried a couple of firmware images from different vendors listed on chinagadgetsreviews.blogspot.de to repair a non-booting E708 that just showed (Intenso)-Logo on start. Most of the firmwares from other vendors show black screens, have wrong display resolutions or non-working sound and, unfortunately, non-working touchscreen input.


 * Caution: If your QE708 is working fine, do not flash the below, but rather try to extract the stock rom firmware with sunxi-tools above and have someone with a broken one test your image.

.............................................................................. Discussion, firmware, etc


 * has some firmwares. They're stored on Baidu NetDisk. (The webpage and the netdisk are both in Chinese)

= See also =