TWRP device tree for Archos Hello 5 (ac50hello)

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Develloppement status :

Blocking checks

• Correct screen/recovery size
• Working Touch, screen
• Backup to internal/microSD
• Restore from internal/microSD
• reboot to system
• ADB

Medium checks

• update.zip sideload
• UI colors (red/blue inversions)
• Correct screen orientation
• Screen goes off and on
• F2FS/EXT4 Support, exFAT/NTFS where supported
• all important partitions listed in mount/backup lists
• backup/restore to/from external (USB-OTG) storage
• backup/restore to/from adb (https://gerrit.omnirom.org/#/c/15943/)
• decrypt /data
• Correct date

Minor checks

• MTP export
• reboot to bootloader
• reboot to recovery
• poweroff
• battery level
• temperature
• encrypted backups
• input devices via USB (USB-OTG) - keyboard, mouse and disks
• USB mass storage export
• set brightness
• vibrate
• screenshot
• partition SD card

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Miscellaneous :

How to compile TWRP :

croot; export ALLOW_MISSING_DEPENDENCIES=true; export PATH=$PWD/bin:$PATH; source build/envsetup.sh; lunch omni_ac50hello-userdebug; mka clean; mka recoveryimage

https://github.com/minimal-manifest-twrp/platform_manifest_twrp_omni/tree/twrp-8.1

If you get an error from out/soong/.intermediates/external/selinux/checkpolicy/checkpolicy/linux_x86_64/gen/lex/external/selinux/checkpolicy/policy_scan.c do this then rebuild

croot; mv prebuilts/misc/linux-x86/flex/flex-2.5.39 prebuilts/misc/linux-x86/flex/flex-2.5.39.old; ln -s /usr/bin/flex prebuilts/misc/linux-x86/flex/flex-2.5.39

https://www.programmersought.com/article/8508930654/

If you get a fatal error: 'ext4crypt_tar.h' file not found do this then rebuild

croot; cp bootable/recovery/crypto/ext4crypt/ext4crypt_tar.h bootable/recovery/

If you get a SyntaxError from Python this may mean that your /bin/python is Python3 but Android 8.1 needs Python2, so do this then rebuild

https://wiki.archlinux.org/index.php/Android#Setting_up_the_build_environment

Unsigned Stock rom extracted by none other than me :

https://drive.google.com/file/d/1xBjN4QrCB_QOoR1nHTn25CGDdWrMkYng/view?usp=sharing

Thanks :

• https://forum.xda-developers.com/t/guide-porting-twrp-without-source.3843473/ ❤️❤️❤️ for making possible to make kind of an initial draft of porting TWRP
• https://github.com/imasaru/android_device_tree_template ❤️❤️ for the beginner script
• https://github.com/wadimaks/android_device_mediatek_mt6580/ ❤️ for informations and flags (TARGET_USE_CUSTOM_LUN_FILE_PATH, TW_CUSTOM_CPU_TEMP_PATH...) for the mt6580
• http://forum.xda-developers.com/showthread.php?p=32965365 basis for how to port and compile TWRP
• https://github.com/ShivamKumarJha/android_tools script to make proprietary-files.txt and vendor_prop.mk

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About Device

Component	Specs
Chipset	MediaTek MT6580
CPU	ARM Cortex-A7, Quad-Core, 1.3GHz
GPU	ARM Mali-400 MP, 500MHz
Memory	2GB (soldered)
Shipped Android Version	8.1 (Oreo)
Storage	16GB eMMC
MicroSD	Up to 128 GB
Battery	3000 mAh, Li-Ion (non-removable)
Display	Landscape 1280x720 pixels, 5"
Front Camera	5.0 MP + Physical obturation system
Rear Camera	N/A
Wifi	2.4GHz
Cellular	N/A
Bluetooth	v4.0 BLE
GPS	Yes
Vibration Motor	N/A
USB	Micro USB, No OTG
Release Date	2018
Treble Compatibility	ARM 32-bit, A-only