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4.1 DM-verity configuration

DM-verity (device-mapper-verity) provides transparent integrity checking of block devices. It can prevent device from running

unauthorized images. This feature is enabled by default. Replacing one or more partitions (boot, vendor, system, vbmeta) will

make the board unbootable. Disabling DM-verity provides convience for developers, but the device is unprotected.

To disable DM-verity, perform the following steps:

1.  setting->system->about tablet click build number to open development options

2.  setting->system->developer options enable OEM unlocking

3.  adb reboot bootloader

4.  fastboot oem unlock

5.  after the fourth step and boot up the device,excute adb root, adb disable-verity, adb reboot

4-1-1 build number

4-1-2 oem unlock

4.1 DM-verity configuration

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Summary of Contents for MYD-JX8MX Series

Page 1: ......

Page 2: ...ment 3 Android system program and compile 3 1 Program Android image to EMMC 3 2 Program Android image to SD card 3 3 Compile Android system 4 Android function introduction 4 1 DM verity configuration...

Page 3: ...t boards History Version Note Date V1 0 Initial Version 2019 10 18 Hardware Version This document applies to the following series Development Board of MYIR currently MYD JX8MX At least 2GDDR The memor...

Page 4: ...s driver YES Device Driver SPI SPI bus driver YES Device Driver Ethernet 10M 100M 1000M driver YES Device Driver MMC MMC EMMC TF card stoage driver YES Device Driver HDMI HDMI driver YES Device Driver...

Page 5: ...sources list bak 2 Copy contents from the tuna 16 04 column to etc apt sources list file 3 Update source apt get update PS If error happens to appstream3 you can remove the package first and then upd...

Page 6: ...repo bin repo chmod a x bin repo export PATH bin PATH Configure git Make sure that git is set up properly with the commands below git config global user name abc123 git config global user email def45...

Page 7: ...s a long time you can use the compiled image to program to the development board use UUU tools to program This chapter first describes how to program images to EMMC and SD cards and then introduces th...

Page 8: ...inistrator privileges as shown below 3 1 1 cmd picture Jump to the decompressed directory and execute uuu_imx_android_flash bat f imx8mq a e c 7 3 1 2 UUU command Please make sure that the TF card slo...

Page 9: ...3 1 3 board connection The process is as follows 3 1 4 program After programming set the DIP switch to sw1 LLHL sw2 LH to start 3 1 Program Android image to EMMC 9...

Page 10: ...strator privileges as shown below 3 2 1 cmd picture Jump to the decompressed directory and execute uuu_imx_android_flash bat f imx8mq a e c 7 t sd 3 2 2 UUU command Please make sure that the TF card s...

Page 11: ...The process is as follows 3 2 4 program After 3 3 Insert TF card please pay attention to this time 3 2 5 TF program After programming set the DIP switch to sw1 HHLL sw2 LH to start 3 2 Program Androi...

Page 12: ...3 2 Program Android image to SD card 12...

Page 13: ...xt complete compilation Image Name Note u boot imx8mq imx Bootloader with padding for JX8MX board u boot imx8mq evk uuu imx Bootloader used by UUU for JX8MX board It is not flashed to MMC boot img Boo...

Page 14: ...nction list 4K playback MIPI CSI front and back camera Network WIFI Bluetooth Audio record Headphone USB 3 0 interface 4G module Uart Spi Not support list M 2 SSD auto mount MIPI DSI convert to LVDS 4...

Page 15: ...unbootable Disabling DM verity provides convience for developers but the device is unprotected To disable DM verity perform the following steps 1 setting system about tablet click build number to ope...

Page 16: ...4 1 3 reboot bootloader 4 1 4 disable verity 4 1 DM verity configuration 16...

Page 17: ...ur memory only have 2G so reduece CMA 1280M to 960M 0850026deeb135977c37d5b3ecbed4be0f6bbb39 fix use www badiu com replace www google com 293158fe4683e0120476ac06157f7bd69bb87d82 fix dnsmasq avc err 1...

Page 18: ...4 2 3 choose network Ethernet APP can view more information 4 2 NETWORK test 18...

Page 19: ...M 1CX BCM4356 wifi module if use QCOM qca9377 module set androidboot wifivendor qca BOARD_KERNEL_CMDLINE androidboot wifivendor rtk The wifi s antenna is U6 settings Network internet Wi Fi is used to...

Page 20: ...4 4 BLUETOOTH test Bluetooth first reference 4 3 set to the correct wifi module The bluetooth s antenna is U5 settings connected devices Pair new device Avaliable devices 4 4 BLUETOOTH test 20...

Page 21: ...ra module is ov5640 the development board J2 is the backfont camera and the J26 is the front camera If only one camera is used please connect to the backfont camera J2 Camera APP can use to test 4 5 1...

Page 22: ...4 6 AUDIO test Sound Record APP can use to test 4 6 1 record When playing the default output is to HDMI If no HDMI is connected the sound will be output from the headphone port j9 4 6 AUDIO test 22...

Page 23: ...utput by setting console ttymxcx and androidboot console ttymxcx in uboot uart Note ttymxc0 J18 ttymxc1 J19 ttymxc3 J21 For example set J21 as a debug uart port for testing the steps are as follows 1...

Page 24: ...the device connect the LTE module and the sim card If the card is not recognized please check if the sim card is reversed 4 8 1 telecom At this time you cannot access the Internet You need to configur...

Page 25: ...ss to new APN Item Telecom Mobile Unicom Name ChinaTelecom ChinaMobile ChinaUnicom APN ctnet cmnet 3gnet APN protocol IPv4 IPv6 IPv4 IPv6 IPv4 IPv6 APN roaming protocol IPv4 IPv6 IPv4 IPv6 IPv4 IPv6 4...

Page 26: ...4 8 5 Connected 4 8 4G test 26...

Page 27: ...en the corresponding node is 4 1 32 10 106 The GPIO test steps are as follows 1 Dts configuration corresponding pin pin for GPIO mode 2 Export node echo 106 sys class gpio export 3 Set direction echo...

Page 28: ...fault vendor nxp opensource kernel_imx arch arm64 boot dts freescale myb fsl imx8mq evk dts user label User k3 Button gpios gpio3 13 GPIO_ACTIVE_LOW gpio key wakeup linux code KEY_1 This value can be...

Page 29: ...short time cooperation Instead we hope to establish long term cooperation and win win business with customers So we will offer reasonable prices in the hope of making the business greater with the cus...

Page 30: ...urface with fingers or hands to leave fingerprint 4 Do not clean the surface of the screen with chemicals 5 Please read through the product user manual before you using MYIR s products 6 For any maint...

Page 31: ...etc 3 MYIR provides other products supporting services like power adapter LCD panel etc 4 ODM OEM services MYIR Tech Limited Room 1306 Wensheng Center Wenjin Plaza North Wenjin Road Luohu District Sh...

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