VIA Technologies ARTiGO A935 User manual

QUICK START GUIDE
VIA ARTiGO A935
Android 10.0 EVK
1.00-21032023

Copyright
Copyright © 2023 VIA Technologies Incorporated. All rights reserved.
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VIA Technologies makes no warranes, implied or otherwise, in regard to this document and to the products described in this document.
The informaon provided in this document is believed to be accurate and reliable as of the publicaon date of this document. However,
VIA Technologies assumes no responsibility for the use or misuse of the informaon (including use or connecon of extra device/
equipment/add-on card) in this document and for any patent infringements that may arise from the use of this document. The informaon
and product specicaons within this document are subject to change at any me, without noce and without obligaon to nofy any
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VIA Technologies, Inc. reserves the right the make changes to the products described in this manual at any me without prior noce.
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VIA ARTiGO A935 Android 10.0 EVK Quick Start Guide
Revision History
Version Date Remarks
1.00 21/03/2023 Inial release

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VIA ARTiGO A935 Android 10.0 EVK Quick Start Guide
Table of Contents
1. Introducon.................................................................................................................................................... 1
1.1 EVK Package Contents........................................................................................................................... 1
1.1.1 Firmware Folder Contents ............................................................................................................. 1
1.1.2 Document Folder Contents............................................................................................................ 1
1.1.3 Tool Folder Contents...................................................................................................................... 1
1.2 Version Informaon and Supported Features....................................................................................... 2
2. Image Installaon .......................................................................................................................................... 3
2.1 Installing with the Fastboot Mode........................................................................................................ 3
3. Hardware Funcons ....................................................................................................................................... 6
3.1 Enabling ADB Debugging ...................................................................................................................... 6
3.2 Changing the Kernel Debug Level ......................................................................................................... 6
3.3 Checking the BSP Version...................................................................................................................... 6
3.4 DVFS...................................................................................................................................................... 7
3.5 MTK NeuroPilot AI APU Hardware Acceleraon ................................................................................... 8

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VIA ARTiGO A935 Android 10.0 EVK Quick Start Guide
1. Introducon
This Quick Start Guide provides an overview of how to boot the Android image for the VIA ARTiGO A935 and
congure the supported hardware funcons in the build.
The VIA ARTiGO A935 Android 10.0 EVK is developed based on the MediaTek Android 10.0 BSP, and it enables
the hardware features of the VIA ARTiGO A935.
1.1 EVK Package Contents
There are three folders in the package listed as below.
Firmware folder Descripon
VIA_ARTiGO_A935_Android_10.0_EVK.zip Android evaluaon image
Document folder Descripon
VIA_ARTiGO_A935_Android_10.0_EVK_Quick_Start_Guide.pdf Quick Start Guide
Tool folder Descripon
VIA_Android_USB_Driver.zip VIA USB driver
PoseDetector_Image.apk A sample test program
1.1.1 Firmware Folder Contents
VIA_ARTiGO_A935_Android_10.0_EVK.zip: Contains the precompiled Android image for evaluang the VIA
ARTiGO A935.
1.1.2 Document Folder Contents
VIA_ARTiGO_A935_Android_10.0_EVK_Quick_Start_Guide.pdf: This Quick Start Guide provides an overview
on how to boot the Android image for the VIA ARTiGO A935 and congure the supported hardware funcons
in the build.
1.1.3 Tool Folder Contents
VIA_Android_USB_Driver.zip: The VIA driver for ADB-over-USB.
PoseDetector_Image.apk: A sample program to test MTK NeuroPilot AI APU hardware acceleraon.

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VIA ARTiGO A935 Android 10.0 EVK Quick Start Guide
1.2 Version Informaon and Supported Features
• Kernel version: 4.14.141
• Evaluaon image: Android 10.0
• Development based on MediaTek Android 10.0 BSP
• Supports eMMC boot
• Supports HDMI display
• Supports HDMI audio output
• Supports COM port as RS-232 mode (TX/RX)
• Supports 10/100Mbps Ethernet port
• Supports MediaTek MT6357 Line-out and Mic-in
• Supports MediaTek MT6631 Wi-Fi 802.11ac and Bluetooth 5.0
• Supports VIA EMIO-2573 (EC25) 4G LTE mobile broadband miniPCIe module
• Supports MediaTek NeuroPilot AI APU hardware acceleraon

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VIA ARTiGO A935 Android 10.0 EVK Quick Start Guide
2. Image Installaon
This secon explains the setup procedures for boong from the eMMC.
The precompiled images are provided in the "Firmware" folder.
2.1 Installing with the Fastboot Mode
Follow the steps below to install Android EVK image:
Step 1
Prepare the "fastboot tool" and install the "VIA USB driver" into your Windows 10 host machine.
To get the "fastboot tool" for Windows, please refer to the "SDK Plaorm Tools release notes" chapter on the
Android developer website hps://developer.android.com/studio/releases/plaorm-tools.
To install the "VIA USB driver", right-click "android_winusb" and select "Install".
Then click "Install" when the installer opens.
When the installer nishes, it will show a conrmaon message "The operaon completed successfully".
Step 2
Connect the Windows 10 host machine and the VIA ARTiGO A935 through the Micro USB 2.0 port using the
Micro USB cable.
Micro USB 2.0 OTG
Micro USB 2.0 port diagram

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VIA ARTiGO A935 Android 10.0 EVK Quick Start Guide
Step 3
Plug in the AC-to-DC power adapter to power on the VIA ARTiGO A935.
If the EVK image is not installed, the VIA ARTiGO A935 will stop at "fastboot: processing commands" as shown
in the debug console below. Proceed to step 4 directly.
Fastboot Mode
If the EVK image is already installed, use the following command to enter the Fastboot Mode on your Windows
10 host machine.
D:\platform-tools>adb shell reboot bootloader
Note:
Make sure the Windows 10 host machine detects the VIA ARTiGO A935 as an ADB device.
Step 4
Extract the VIA_ARTiGO_A935_Android_10.0_EVK.zip les on your Windows 10 host machine.
To install the image, use the following command:
D:\VIA_ARTiGO_A935_Android_10.0_EVK>set PATH=D:\platform-tools;%PATH%
D:\VIA_ARTiGO_A935_Android_10.0_EVK>viaash.exe --android
VIA: Operating system is Android
VIA: installing preloader.img
VIA: installing GPT.img
VIA: erasing proinfo partition
VIA: erasing boot_para partition
VIA: installing cam_vpu1.img
VIA: installing cam_vpu2.img
VIA: installing cam_vpu3.img
VIA: erasing nvram partition
VIA: installing protect1.img
VIA: installing protect2.img
VIA: installing persist.img
VIA: installing nvcfg.img
VIA: erasing seccfg partition
VIA: installing lk.img
VIA: installing lk.img
VIA: installing boot.img
VIA: installing recovery.img
VIA: erasing para partition
VIA: installing logo.bin
VIA: installing dtbo.img
VIA: erasing expdb partition
VIA: erasing frp partition
VIA: installing tee.img
VIA: installing tee.img
VIA: erasing kb partition
VIA: erasing dkb partition
VIA: erasing metadata partition
VIA: installing vbmeta.img
VIA: installing nvdata.img
VIA: installing vbmeta_system.img
VIA: installing vbmeta_vendor.img
VIA: installing super.img
VIA: installing cache.img
VIA: installing userdata.img
VIA: rebooting target system
D:\VIA_ARTiGO_A935_Android_10.0_EVK>

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VIA ARTiGO A935 Android 10.0 EVK Quick Start Guide
Step 5
Unplug the AC-to-DC power adapter to power o the VIA ARTiGO A935.
Step 6
Unplug the Micro USB cable, press the Power Buon for 2 seconds, then release it to power on the VIA ARTiGO
A935.
When the boot process has completed, you will see the Android 10.0 desktop.

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VIA ARTiGO A935 Android 10.0 EVK Quick Start Guide
3. Hardware Funcons
This secon explains how to enable and test the hardware funcons precompiled in the Android 10.0 EVK.
3.1 Enabling ADB Debugging
Follow the steps below to enable ADB debugging:
Step 1
Connect the Windows 10 host machine and the VIA ARTiGO A935 through the Micro USB 2.0 port using the
Micro USB cable.
Micro USB 2.0 OTG
Micro USB 2.0 port diagram
Step 2
Power on the VIA ARTiGO A935 to iniate the boot process.
Step 3
When the VIA ARTiGO A935 has completed boong, use the following command to open ADB debugging.
E:\platform-tools>adb shell
3.2 Changing the Kernel Debug Level
To disable the kernel messages, modify the debug level using the following command:
console:/ # su
console:/ # echo 3 > /proc/sys/kernel/printk
3.3 Checking the BSP Version
To check the BSP version, use the following command:
console:/ # cat /proc/version

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VIA ARTiGO A935 Android 10.0 EVK Quick Start Guide
3.4 DVFS
To verify the DVFS (Dynamic Voltage Frequency Scaling) funcon and list all the supported features, use the
following commands:
console:/ # ls -l /sys/devices/system/cpu/cpu0/cpufreq/
total 0
-r--r--r-- 1 root root 4096 2022-02-24 18:16 affected_cpus
-r-------- 1 root root 4096 2022-02-24 18:16 cpuinfo_cur_freq
-r--r--r-- 1 root root 4096 2022-02-24 18:16 cpuinfo_max_freq
-r--r--r-- 1 root root 4096 2022-02-24 18:16 cpuinfo_min_freq
-r--r--r-- 1 root root 4096 2022-02-24 18:16 cpuinfo_transition_latency
-r--r--r-- 1 root root 4096 2022-02-24 18:16 related_cpus
-r--r--r-- 1 root root 4096 2000-01-01 00:00 scaling_available_frequencies
-r--r--r-- 1 root root 4096 2022-02-24 18:16 scaling_available_governors
-r--r--r-- 1 root root 4096 2022-02-24 18:16 scaling_cur_freq
-r--r--r-- 1 root root 4096 2022-02-24 18:16 scaling_driver
-rw-r--r-- 1 root root 4096 2022-02-23 15:46 scaling_governor
-rw-rw---- 1 system system 4096 2000-01-01 00:00 scaling_max_freq
-rw-rw-r-- 1 system system 4096 2000-01-01 00:00 scaling_min_freq
-rw-r--r-- 1 root root 4096 2022-02-24 18:16 scaling_setspeed
drwxr-xr-x 2 root root 0 2022-02-24 18:16 schedutil
drwxr-xr-x 2 root root 0 2000-01-01 00:00 stats
console:/ #
To check the supported and current CPU frequency, use the following commands:
console:/ # cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies
850000 918000 987000 1056000 1125000 1216000 1308000 1400000 1466000 1533000 1633000 1700000
1767000 1834000 1917000 2001000
console:/ # cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq
1400000

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VIA ARTiGO A935 Android 10.0 EVK Quick Start Guide
3.5 MTK NeuroPilot AI APU Hardware Acceleraon
We recommend running the "PoseDetector_Image.apk" sample program for tesng MTK NeuroPilot AI APU
hardware acceleraon. To install the program, follow the steps below:
1. Copy the "PoseDetector_Image.apk" le to a USB drive and connect the USB drive to the VIA ARTiGO
A935 system.
2. Next, navigate to "Files" and click on the USB drive's name to nd "PoseDetector_Image.apk" as shown
below. Double-click the program.
3. When the program opens, it will display a dialog box as shown below. Click "Connue" to conrm.
Aer installaon, double-click "PoseDetector" to run the program.

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VIA ARTiGO A935 Android 10.0 EVK Quick Start Guide
Check the Pose Detecon inference me on the boom le corner of the program:
• If the inference me is less than 200 ms, MTK NeuroPilot AI APU hardware acceleraon is enabled and
running correctly.
• If the inference me is greater than 200 ms, MTK NeuroPilot AI APU hardware acceleraon is disabled.

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