VIA Technologies SOM-9X50-STK User manual

QUICK START GUIDE
VIA SOM-9X50-STK
Android 10.0 EVK
1.01-05052022

Copyright
Copyright © 2020 VIA Technologies Incorporated. All rights reserved.
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VIA Technologies, Incorporated.
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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.
ii

iii
VIA SOM-9X50-STK Android 10.0 EVK Quick Start Guide
Revision History
Version Date Remarks
1.01 05/05/2022 Updated secon 2.1 and product naming
1.00 25/08/2021 Inial release

iv
VIA SOM-9X50-STK 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 ....................................................................................................................................... 7
3.1 Using the Debug Console...................................................................................................................... 7
3.2 Changing the Kernel Debug Level ......................................................................................................... 7
3.3 Checking the BSP Version...................................................................................................................... 7
3.4 DVFS...................................................................................................................................................... 7
3.5 Display................................................................................................................................................... 8
3.6 Camera.................................................................................................................................................. 8
3.7 MTK NeuroPilot AI APU Hardware Acceleraon................................................................................... 9

1
VIA SOM-9X50-STK 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 SOM-9X50-STK and
congure the supported hardware funcons in the build.
Note:
The VIA SOM-9X50-STK includes the VIA SOM-9X50 module and the VIA VAB-950 reference carrier board.
The VIA SOM-9X50-STK Android 10.0 EVK is developed based on the MediaTek Android 10.0 BSP, and it enables
the hardware features of the VIA SOM-9X50-STK.
1.1 EVK Package Contents
There are three folders in the package listed as below.
Firmware folder Descripon
VIA_SOM-9X50-STK_Android_10.0_EVK.zip Android image
Document folder Descripon
VIA_SOM-9X50-STK_Android_10.0_EVK_Quick_Start_Guide.pdf Quick Start Guide
Tool folder Descripon
VIA_Android_USB_Driver.zip VIA USB driver
1.1.1 Firmware Folder Contents
VIA_SOM-9X50-STK_Android_10.0_EVK.zip: Contains the precompiled Android image for evaluang the VIA
SOM-9X50-STK.
1.1.2 Document Folder Contents
VIA_SOM-9X50-STK_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 SOM-9X50-STK and congure the supported hardware funcons
in the build.
1.1.3 Tool Folder Contents
VIA_Android_USB_Driver.zip: VIA USB driver.

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VIA SOM-9X50-STK 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 MIPI DSI capacive touch panel
−AUO 10.1 B101UAN01.7 (1920x1200)
−eGalax I2C touch
• Supports COM1 as RS-232 mode (TX/RX) and COM as debug port
• Supports two 10/100Mbps Ethernet ports
• Supports MediaTek MT6358 Headphone and Mic-in
• Supports MediaTek MT7668 Wi-Fi 802.11ac and Bluetooth 5.0
• Supports VIA EMIO-2574 (SIM7600JC-H) 4G LTE mobile broadband miniPCIe module
• Supports MIPI CSI OV5648 camera module
• Supports MediaTek NeuroPilot AI APU hardware acceleraon

3
VIA SOM-9X50-STK Android 10.0 EVK Quick Start Guide
2. Image Installaon
This secon explains the setup requirements for boong from the eMMC.
The precompiled images are provided in the "Firmware" folder.
2.1 Installing with the Fastboot Mode
The rst step is to 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 on the mouse buon to install the "android_winusb". When nished,
it will show "The operaon completed successfully".
Then connect the Windows 10 host machine and the VIA SOM-9X50-STK through the Micro USB 2.0 port using
the Micro USB cable.
Micro USB 2.0 port diagram
Next, on the VIA SOM-9X50-STK, set the two OS image jumpers (J7 and J5) to download mode as shown in the
diagram below.
OS image jumpers diagram
J5 and J7 Sengs Pin 1 Pin 2 Pin 3
Normal mode (default) Open Short Short
Download mode Short Short Open
OS image jumper sengs
Plug in the AC-to-DC power adapter to power on the VIA SOM-9X50-STK.
The VIA SOM-9X50-STK will stop at "fastboot: processing commands" as shown in the debug console below.
.
Fastboot Mode

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VIA SOM-9X50-STK Android 10.0 EVK Quick Start Guide
Note:
Make sure the Windows 10 host machine detects the VIA SOM-9X50-STK as an Android device.
Extract the VIA_SOM-9X50-STK_Android_10.0_EVK.zip le on your Windows 10 host machine.
To install the image, use the following command:
D:\VIA_SOM-9X50-STK_Android_10.0_EVK>set PATH=D:\platform-tools;%PATH%
D:\VIA_SOM-9X50-STK_Android_10.0_EVK>viaash.exe
++++++++++++++++++++++++++++++++++++++++++++++++++++
VIAFlash version v1.0.0
(built: Mar 16 2022 18:03:28 UTC)
++++++++++++++++++++++++++++++++++++++++++++++++++++
To let this tool work well, please
ensure the system is at fastboot mode!
If yes, please press any key to continue.
++++++++++++++++++++++++++++++++++++++++++++++++++++
>> Image OS is "Android"
++++++++++++++++++++++++++++++++++++++++++++++++++++
MBR : OK
preloader_tb8788p1_64_wi.bin : OK
logo.bin : OK
vbmeta.img : OK
vbmeta_system.img : OK
vbmeta_vendor.img : OK
md1img.img : OK
spmfw.img : OK
scp.img : OK
sspm.img : OK
cam_vpu1.img : OK
cam_vpu2.img : OK
cam_vpu3.img : OK
lk.img : OK
boot.img : OK
dtbo.img : OK
tee.img : OK
super.img : OK
userdata.img : OK
++++++++++++++++++++++++++++++++++++++++++++++++++++
=============================================
Start to ash images --> Android
=============================================
Sending 'preloader_a' (255 KB) OKAY [ 0.032s]
Writing 'preloader_a' OKAY [ 0.014s]
Finished. Total time: 0.071s
Erasing 'pgpt' OKAY [ 0.014s]
Finished. Total time: 0.024s
Sending 'pgpt' (17 KB) OKAY [ 0.026s]
Writing 'pgpt' OKAY [ 0.007s]
Finished. Total time: 0.051s
Sending 'logo' (2801 KB) OKAY [ 0.090s]
Writing 'logo' OKAY [ 0.074s]
Finished. Total time: 0.194s
Sending 'vbmeta_a' (4 KB) OKAY [ 0.026s]
Writing 'vbmeta_a' OKAY [ 0.006s]
Finished. Total time: 0.052s
Sending 'vbmeta_system_a' (4 KB) OKAY [ 0.025s]
Writing 'vbmeta_system_a' OKAY [ 0.006s]
Finished. Total time: 0.053s

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VIA SOM-9X50-STK Android 10.0 EVK Quick Start Guide
Sending 'vbmeta_vendor_a' (4 KB) OKAY [ 0.025s]
Writing 'vbmeta_vendor_a' OKAY [ 0.006s]
Finished. Total time: 0.054s
Sending 'md1img_a' (0 KB) OKAY [ 0.026s]
Writing 'md1img_a' OKAY [ 0.006s]
Finished. Total time: 0.051s
Sending 'spmfw_a' (47 KB) OKAY [ 0.027s]
Writing 'spmfw_a' OKAY [ 0.008s]
Finished. Total time: 0.055s
Sending 'scp_a' (608 KB) OKAY [ 0.038s]
Writing 'scp_a' OKAY [ 0.022s]
Finished. Total time: 0.088s
Sending 'sspm_a' (480 KB) OKAY [ 0.036s]
Writing 'sspm_a' OKAY [ 0.019s]
Finished. Total time: 0.077s
Sending 'cam_vpu1_a' (1610 KB) OKAY [ 0.059s]
Writing 'cam_vpu1_a' OKAY [ 0.044s]
Finished. Total time: 0.126s
Sending 'cam_vpu2_a' (9887 KB) OKAY [ 0.242s]
Writing 'cam_vpu2_a' OKAY [ 0.220s]
Finished. Total time: 0.492s
Sending 'cam_vpu3_a' (135 KB) OKAY [ 0.028s]
Writing 'cam_vpu3_a' OKAY [ 0.012s]
Finished. Total time: 0.062s
Sending 'lk_a' (774 KB) OKAY [ 0.041s]
Writing 'lk_a' OKAY [ 0.026s]
Finished. Total time: 0.091s
Sending 'dtbo_a' (8192 KB) OKAY [ 0.200s]
Writing 'dtbo_a' OKAY [ 0.186s]
Finished. Total time: 0.410s
Sending 'tee_a' (139 KB) OKAY [ 0.028s]
Writing 'tee_a' OKAY [ 0.011s]
Finished. Total time: 0.062s
Sending 'userdata' (860 KB) OKAY [ 0.043s]
Writing 'userdata' OKAY [ 0.157s]
Finished. Total time: 0.225s
------------------------------------------------
Platform will be rebooted and continue soon,
please wait for ash completed
------------------------------------------------
Rebooting into bootloader OKAY [ 0.004s]
Finished. Total time: 0.006s
< waiting for any device >
Sending 'boot_a' (33792 KB) OKAY [ 0.905s]
Writing 'boot_a' OKAY [ 0.750s]
Finished. Total time: 1.723s
------------------------------------------------
Platform will be rebooted and continue soon,
please wait for ash completed
------------------------------------------------
Rebooting into bootloader OKAY [ 0.003s]
Finished. Total time: 0.006s
< waiting for any device >
Sending sparse 'super' 1/12 (131068 KB) OKAY [ 3.209s]
Writing 'super' OKAY [ 3.036s]
Sending sparse 'super' 2/12 (128270 KB) OKAY [ 2.956s]

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VIA SOM-9X50-STK Android 10.0 EVK Quick Start Guide
Writing 'super' OKAY [ 4.464s]
Sending sparse 'super' 3/12 (127597 KB) OKAY [ 2.943s]
Writing 'super' OKAY [ 3.553s]
Sending sparse 'super' 4/12 (131068 KB) OKAY [ 3.046s]
Writing 'super' OKAY [ 3.092s]
Sending sparse 'super' 5/12 (131068 KB) OKAY [ 2.929s]
Writing 'super' OKAY [ 2.916s]
Sending sparse 'super' 6/12 (131071 KB) OKAY [ 3.183s]
Writing 'super' OKAY [ 11.019s]
Sending sparse 'super' 7/12 (131068 KB) OKAY [ 2.979s]
Writing 'super' OKAY [ 3.179s]
Sending sparse 'super' 8/12 (125124 KB) OKAY [ 2.920s]
Writing 'super' OKAY [ 2.940s]
Sending sparse 'super' 9/12 (118861 KB) OKAY [ 2.806s]
Writing 'super' OKAY [ 3.327s]
Sending sparse 'super' 10/12 (125744 KB) OKAY [ 2.847s]
Writing 'super' OKAY [ 2.995s]
Sending sparse 'super' 11/12 (131068 KB) OKAY [ 3.032s]
Writing 'super' OKAY [ 3.103s]
Sending sparse 'super' 12/12 (73272 KB) OKAY [ 1.712s]
Writing 'super' OKAY [ 1.783s]
Finished. Total time: 80.451s
=============================================
Finished. Re-Starting system ...
Rebooting OKAY [ 0.003s]
Finished. Total time: 0.006s
D:\VIA_SOM-9X50-STK_Android_10.0_EVK>
If you have already installed the image, use the following command to enter the Fastboot Mode on your
Windows 10 host machine.
E:\platform-tools>adb reboot bootloader
Unplug the AC-to-DC power adapter to power o the VIA SOM-9X50-STK.
Set the two OS image jumpers (J7 and J5) back to the normal mode seng.
OS image jumper sengs
Unplug the Micro USB cable, press the Power Buon for 2 seconds, then release it to power on the VIA SOM-
9X50-STK.
When the boot process has completed, you will see the Android 10.0 desktop.

7
VIA SOM-9X50-STK 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
including using the debug console.
3.1 Using the Debug Console
The rst step is to connect the host machine and the VIA SOM-9X50-STK through the COM connector labeled
as "COM". Use a serial port communicaon program such as PuTTY or Tera Term to connect the debug console.
Set the console Baud Rate to "921600".
COM connector diagram
Next, power on the VIA SOM-9X50-STK to iniate the boot process.
When the boot process has completed, log in to the debug console.
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
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 2020-04-06 06:34 aected_cpus
-r-------- 1 root root 4096 2020-04-06 06:34 cpuinfo_cur_freq
-r--r--r-- 1 root root 4096 2020-04-06 06:34 cpuinfo_max_freq
-r--r--r-- 1 root root 4096 2020-04-06 06:34 cpuinfo_min_freq
-r--r--r-- 1 root root 4096 2020-04-06 06:34 cpuinfo_transition_latency

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VIA SOM-9X50-STK Android 10.0 EVK Quick Start Guide
-r--r--r-- 1 root root 4096 2020-04-06 06:34 related_cpus
-r--r--r-- 1 root root 4096 2020-04-06 06:34 scaling_available_frequencies
-r--r--r-- 1 root root 4096 2020-04-06 06:34 scaling_available_governors
-r--r--r-- 1 root root 4096 2020-04-06 06:34 scaling_cur_freq
-r--r--r-- 1 root root 4096 2020-04-06 06:34 scaling_driver
-rw-rw---- 1 system system 4096 2010-01-01 00:00 scaling_governor
-rw-rw---- 1 system system 4096 2010-01-01 00:00 scaling_max_freq
-rw-rw-r-- 1 system system 4096 2010-01-01 00:00 scaling_min_freq
-rw-r--r-- 1 root root 4096 2020-04-06 06:34 scaling_setspeed
console:/ #
To check the supported and current CPU frequency, use the following commands:
:~# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies
1989000 1924000 1846000 1781000 1716000 1677000 1625000 1586000 1508000 1417000 1326000
1248000 1131000 1014000 910000 793000
:~# cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq
793000
3.5 Display
There is no need to set the display device. If you connect an HDMI display, HDMI output will be automacally
enabled aer boong. If you connect an LCD panel, LCD panel output will be automacally enabled aer
boong.
3.6 Camera
You must connect the CSI camera before boong the VIA SOM-9X50-STK aer the image installaon.
Click the "Camera" APK on the Android desktop to verify the camera funcon.
If the CSI camera is connected correctly, but there is no "Camera" APK on the Android desktop, go to "Sengs
-> System -> Advanced -> Reset opons" and press "Erase all data (factory reset)" to restart the system.
The "Camera" APK will be generated aer the system is rebooted.

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VIA SOM-9X50-STK Android 10.0 EVK Quick Start Guide
3.7 MTK NeuroPilot AI APU Hardware Acceleraon
We recommend that you install the third-party APK "image_classicaon_MobileNet_app-debug.apk" for
vericaon.
To enlarge the logcat buer to 64MB, use the following command:
console:/ # logcat -G 64M
To enable the NeuroPilot relave log for geng the NN relave log in logcat, use the following command:
console:/ # su
console:/ # setprop debug.nn.vlog 1
console:/ # setprop debug.neuropilot.apu_nn.log 1
console:/ # setprop debug.neuropilot.gpu_nn.log 1
console:/ # setprop debug.neuropilot.arm_nn.log 1
Run the third-party APK "image_classicaon_MobileNet_app-debug.apk".
Then choose "Model: Quanzed" and "Device: NNAPI".
To check that the NeuroPilot AI APU hardware acceleraon is enabled, use the following command:
console:/ # logcat | grep ndBestDeviceForEachOperation
11-05 04:31:15.502 3728 6893 I ExecutionPlan:
ModelBuilder::ndBestDeviceForEachOperation(CONV_2D) = 0 (apunn)
11-05 04:31:15.502 3728 6893 I ExecutionPlan:
ModelBuilder::ndBestDeviceForEachOperation(DEPTHWISE_CONV_2D) = 0 (apunn)
11-05 04:31:15.502 3728 6893 I ExecutionPlan:
ModelBuilder::ndBestDeviceForEachOperation(CONV_2D) = 0 (apunn)
11-05 04:31:15.502 3728 6893 I ExecutionPlan:
ModelBuilder::ndBestDeviceForEachOperation(AVERAGE_POOL_2D) = 0 (apunn)
11-05 04:31:15.502 3728 6893 I ExecutionPlan:
ModelBuilder::ndBestDeviceForEachOperation(CONV_2D) = 0 (apunn)
11-05 04:31:15.502 3728 6893 I ExecutionPlan:
ModelBuilder::ndBestDeviceForEachOperation(RESHAPE) = 0 (apunn)
11-05 04:31:15.503 3728 6893 I ExecutionPlan:
ModelBuilder::ndBestDeviceForEachOperation(SOFTMAX) = 0 (apunn)
Note:
When the value 0 is displayed, it means that the APU hardware acceleraon is enabled.

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