[中文翻译版] 见附件   原文链接： https://community.nxp.com/docs/DOC-343054 

[中文翻译版] 见附件   原文链接： https://community.nxp.com/docs/DOC-343046 

We will cross compile L5.4.3_1.0.0 on ubuntu18.04 LTS platform in three steps. 1. Installing Ubuntu 18.04 to vmplayer14 & Configuring Ubuntu 18.04 LTS 2. Compiling L5.4.3_1.0.0 BSP According to Steps in i.MX_Yocto_Project_User's_Guide.pdf 3. Handling tensorflow-lite compilation errors. --BEGIN No.1 Installing Ubuntu 18.04 to vmplayer14 & Configuring Ubuntu 18.04 LTS 1. Install 18.04 on vmplayer After installation is done, root user should be set at first. # sudo passwd root Then follow these steps to configuration ubuntu 18.04 for environment of compiliation --Changing sources of ubuntu 18.04 mirror If you are Chinese users, you can do the step, which can improve your system performance. # sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak # sudo geit /etc/apt/source.list Comment I.MX customers outside China do not need to modify Ubuntu source list, or can modify it to local mirror site of Ubuntu 18.04, which can improve the speed of software upgrade. Delet all sources and copy following lines here, Then save it and exit Update ubuntu source deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic main restricted universe multiverse # deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic main restricted universe multiverse deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse # deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse # deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-security main restricted universe multiverse # deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-security main restricted universe multiverse # deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse # deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse Then running these 2 commands to update sources and packages # sudo apt-get update # sudo apt-get upgrade 2. Installing packages for compiliation Packages For Compiling BSP # sudo apt-get install flex bison gperf build-essential zlib1g-dev lib32ncurses5-dev x11proto-core-dev libx11-dev lib32z1-dev libgl1-mesa-dev tofrodos python-markdown libxml2-utils xsltproc # sudo apt-get install uuid-dev:i386 liblzo2-dev:i386 gcc-multilib g++-multilib subversion openssh-server openssh-client uuid uuid-dev zlib1g-dev liblz-dev lzop  liblzo2-2 liblzo2-dev git-core curl # sudo apt-get install u-boot-tools mtd-utils android-tools-fsutils openjdk-8-jdk device-tree-compiler aptitude libcurl4-openssl-dev nss-updatedb # sudo apt-get install chrpath texinfo gawk cpio diffstat No.2 Compiling L5.4.3_1.0.0 BSP According to Steps in i.MX_Yocto_Project_User's_Guide.pdf          The detailed BSP compilation steps are given in i.MX_Yocto_Project_User's_Guide.pdf. Here are just some tips and simple steps. For Chinese customers, the system may not respond when the repo init or repo sync command is executed after obtaining the repo script. Detailed description is below: (1)Getting repo script # mkdir ~/bin (this step may not be needed if the bin folder already exists) # curl https://storage.googleapis.com/git-repo-downloads/repo > ~/bin/repo # chmod a+x ~/bin/repo # export PATH=~/bin:$PATH (2)Getting Yocto source # mkdir imx-yocto-bsp # cd imx-yocto-bsp # repo init -u https://source.codeaurora.org/external/imx/imx-manifest -b imx-linux-zeus -m imx-5.4.3-1.0.0.xml # repo sync          After running repo init or repo sync, you may encounter a situation where there is no progress for a long time, and repo sync stops there without any prompt. This may be caused by googlesource site being inaccessible.          At this time, you can modify the googlesource URL to the URL of Tsinghua University. # gedit ./repo          Changing REPO_URL = 'https://gerrit.googlesource.com/git-repo'          To be:                    REPO_URL = 'https://mirrors.tuna.tsinghua.edu.cn/git/git-repo'          Save and exit. Then run “repo init -u https://source.codeaurora.org/external/imx/imx-manifest -b imx-linux-zeus -m imx-5.4.3-1.0.0.xml”. or repo sync No.3 Handling tensorflow-lite compilation errors       If you encounter a tensorflow-lite compilation error during the compilation process, the following processing methods may be helpful to you. Cause Analysis:          Compiling tensorflow-lite requires three steps: fetching packages, configuring environment, and compiling code.          During the configuring environment, the following 8 software packages need to be downloaded. If any of the 8 files are not successfully downloaded, an error will be reported and compilation will be terminated.          ①9f48e814419e.tar.gz          ②38ebac7b059e84692f53e5938f97a9943c120d98.zip          ③release-1.8.0.tar.gz          ④389ec3f906f018661a5308458d623d01f96d7b23.tar.gz          ⑤master.zip          ⑥816a4ae622e964763ca0862d9dbd19324a1eaf45.tar.gz          ⑦1f5eae5d6a135ff6811724f6c57f911d1f46bb15.tar.gz          ⑧fft.tgz          If you encounter this problem, you can refer to the following methods to solve it. Open the file with editor: ~/imx-yocto-bsp/build-xwayland/tmp/work/aarch64-poky-linux/tensorflow-lite/1.13.2-r0/git/tensorflow/lite/tools/make/download_dependencies.sh URLs EIGEN_URL="https://bitbucket.org/eigen/eigen/get/9f48e814419e.tar.gz" GEMMLOWP_URL="https://github.com/google/gemmlowp/archive/38ebac7b059e84692f53e5938f97a9943c120d98.zip" GOOGLETEST_URL="https://github.com/google/googletest/archive/release-1.8.0.tar.gz" ABSL_URL="https://github.com/abseil/abseil-cpp/archive/389ec3f906f018661a5308458d623d01f96d7b23.tar.gz" NEON_2_SSE_URL="https://github.com/intel/ARM_NEON_2_x86_SSE/archive/master.zip" FARMHASH_URL="https://github.com/google/farmhash/archive/816a4ae622e964763ca0862d9dbd19324a1eaf45.tar.gz" FLATBUFFERS_URL="https://github.com/google/flatbuffers/archive/1f5eae5d6a135ff6811724f6c57f911d1f46bb15.tar.gz" FFT2D_URL="http://www.kurims.kyoto-u.ac.jp/~ooura/fft.tgz" Save and exit. [comment]     Don’t run “bitbake tensorflow-lite -c cleanall before you modify it”, otherwise files will be deleted.  Then try to compile tensorflow-lite like below: # bitbake tensorflow-lite -c compile   At the same time, we can open this directory and check if the following directories are created. If these 8 directories are successfully created, it means that links we modified are no problem.          After tensorflow-lite is successfully built, we can continue to compile full images. # bitbake imx-image-full --END NXP TIC team Weidong Sun 2020/3/30

-BACKGROUND       Since the release of i.MX8MQ and i.MX8M Mini, some customers have submitted questions about the design of USB2.0 for these two processors: due to the needs of the project, there is no need to use USB3.0 and USB TYPE-C. Therefore, these applications need to use a conventional USB2.0 interface design similar to i.MX6Q.       In order for customers with similar needs to complete the design smoothly, this document summarizes the answers to previous customer responses and draws two USB2.0 design schematics. At the same time, the i.MX expert hardware team member helped review these two drawings, and the i.MX Expert software team gave suggestions on software adjustments. -BEGIN       i.MX8MQ supports USB3.0 and is compatible with USB2.0, i.MX8M Mini only supports USB2.0, not USB3.0. In both development boards, the USB TYPE-C design scheme is used. We must remove the USB TYPE-C, PD chip and logic chip. At the same time, change the connector to MicroUSB and USB TYPE-A-F. No.1 Hardware Design 1. IOMUX list 2 、USB circuit design (1) USB Power & OC control I.MX8MM i.MX8MQ                                                 i.MX8MQ                                              i.MX8MQ [Comment] For i.MX8MQ -USB1 is configured as Dual Role Mode, USB1 OTG ID is used for detection -USB2 is configured as fixed Host mode, USB2 OTG ID is used for detection -i.MX8M Mini USB2.0                                        i.MX8M Mini                                     i.MX8M Mini [Comment] For i.MX8M Mini -USB1 is configured as Dual Role Mode, USB1 OTG ID is used for detection -USB2 is configured as fixed Host mode, USB2 OTG ID is used for detection (3) Additional description --About USB1_VBUS & USB2_VBUS of i.MX8M Mini          According to i.MX8M Mini datasheet, USB1_VBUS & USB2_VBUS allows 0~3.9V input. See below, please! Therefore, some customers have questioned the USB1_VBUS on the I.MX8M Mini-EVK. From the drawings, the external input voltage exceeds this range.          In fact, customers do not need to worry about this problem. There are internal voltage-dividing resistors on the USB1_VBUS and USB2_VBUS pins. As long as the customer refers to the design method on the I.MX8M Mini-EVK, the input voltage of these 2 pins can be guaranteed Inside. --About USBx OTG ID & USBx_ID (1) USBx_OTG_ID          USBx OTG ID is also called GPIO ID, which is the same as that of i.MX6Q. During the work process, the software changes the role between device and host according to the level of the ID pin from high to low or from low to high. (2)USBx_ID          USBx_ID is called USB PHY ID, which can also perform the same function as USBx OTG ID. (3)Using USBx_OTG_ID or USBx_ID          USBx_OTG_ID is recommended. But if customer wants to use USBx_ID, for i.MX8MQ, she can configure USB_CTL0_ADDR[utmiotg_iddig_sel] register. And for I.MX8M Mini, USBNC_n_CTRL2[DIG_ID_SEL] register. [Comment]          The configuration is got from reference manual of these 2 processors, due to no suitable board, this configuration is not validated on board. Customers can try it. (4) About Flashing Images to the Storage of Board          For an empty board or a board that requires an update image, we need to use the USB interface to program the image. At this time, we need the USB interface to work in device mode. For this, the ROM CODE inside the CPU will ensure that the USB works in device mode. No.2 Tuning Software 1.IOMUX According to the actual application, the signals to be used are multiplexed in the dts file. This step is relatively simple and will not be described here 2. Tuning USB configuration in u-boot / device tree For i.MX8M Mini & i.MX8MQ, i.MX Expert softer team gives the following suggestions, I quote their suggestions here:       Customer can try it by removing CONFIG_USB_TCPC in imx8mm_evk_defconfi and well as removing the typec_ptn5110_1/2 dependencies in the fsl-imx8mm-evk.dts. The uboot does check the state of the Type C ICs and crash or gets stuck if they are removed. --i.MX8M Mini U-BOOT:  CONFIG_USB_TCPC=n Device Tree: &usbotg1 {     status = "okay"; }; &usbotg2 {     status = "okay"; --------------------------------------------------------- --i.MX8MQ --u-boot CONFIG_USB_TCPC=n --Node of Device tree &usb_dwc3_0 {              status = "okay";              /*extcon = <&typec_ptn5100>;*/              dr_mode = "otg";              hnp-disable;              srp-disable;              adp-disable;              maximum-speed = "high-speed"; }; ---------------------------------------------- -END [Comment] If you encounter problems while using this document, please submit a ticket to me. Here are the steps to submit a ticket: 1. Open below SUPPORT site, click blue "Go to Tickets" in the middle. http://www.nxp.com/support/support:SUPPORTHOME 2.Then you will be requested to Login, if you have no an account, please first Register with your business email. 3.After login, please "Create New Cases" button in the middle, then you can submit your question. NXP TIC team Weidong Sun 2020/3/30

[中文翻译版] 见附件   原文链接： https://community.nxp.com/docs/DOC-343059 

[中文翻译版] 见附件   原文链接： https://community.nxp.com/docs/DOC-343113 

[中文翻译版] 见附件   原文链接： https://community.nxp.com/docs/DOC-343116 

[中文翻译版] 见附件   原文链接： Guide to flash an eMMC from SD Card on i.MX6Q SABRE-SD 

[中文翻译版] 见附件   原文链接： https://community.nxp.com/docs/DOC-343178 

[中文翻译版] 见附件   原文链接： https://community.nxp.com/docs/DOC-343102 

Hardware : i.MX8MNLPDDR4EVK Build Yocto Image [Linux 4.14.98_2.3.1] Yocto Project Setup          $: mkdir imx-yocto-bsp          $: cd imx-yocto-bsp                $: repo init -u https://source.codeaurora.org/external/imx/imx-manifest -b imx-linux-sumo -m imx-4.14.98-2.3.1.xml          $: repo sync  copy marvell bb.file into yocto source         $: cp  0001-Porting-mrvl-8987-wifi.patch   imx-yocto-bsp/sources/meta-fsl-bsp-release/imx/meta-bsp         $: git apply 0001-Porting-mrvl-8987-wifi.patch Image Build         $: DISTRO=fsl-imx-xwayland MACHINE=imx8mnlpddr4evk source fsl-setup-release.sh -b build-xwayland         $:bitbake fsl-image-qt5-validation-imx Enable wifi and BT (These operations is on EVK) WiFi $:insmod /lib/modules/4.14.98-2.3.1+g860ec89/extra/sd8xxx.ko fw_name=/mrvl/sduart8987_combo.bin cal_data_cfg=none cfg80211_wext=0xf BT $:hciattach /dev/ttymxc0 any -s 115200 115200 flow dtron $:hciconfig hci0 reset $:hcitool -ihci0 cmd 0x3f 0x0009 0xc0 0xc6 0x2d 0x00 & $:killall hcitool $:killall hciattach $:hciattach /dev/ttymxc0 any -s 3000000 3000000 flow dtron Build  Android Image[Android P9_2.3.4] These patches in  Android-2.3.4-patch. Getting i.MX Android release source code        $: cd ~ (or any other directory you like)        $: tar xzvf imx-p9.0.0_2.3.4.tar.gz        $: mkdir ~/bin        $: curl https://storage.googleapis.com/git-repo-downloads/repo > ~/bin/repo        $: chmod a+x ~/bin/repo        $: export PATH=${PATH}:~/bin        $: source ~/imx-p9.0.0_2.3.0/imx_android_setup.sh        # By default, the imx_android_setup.sh script will create the source code build environemnt        in the folder ~/android_build        # ${MY_ANDROID} will be refered as the i.MX Android source code root directory in all i.MX        Andorid release documentation.        $ : export MY_ANDROID=~/android_build Copy 88W8987 firmware and driver into  Android release code        $:copy -r Android-2.3.4-patch/mrvl    android_build/vendor/nxp/fsl-proprietary  Apply these patches.The name of these patches is the patche installation path.            example:  0001-android_build-hardware-marvell-wlan.patch         $: cp 0001-android_build-hardware-marvell-wlan.patch   android_build/hardware/marvell/wlan            (if not exist android_build/hardware/marvell/wlan, mkdir -p android_build/hardware/marvell/wlan)         $: git apply 0001-android_build-hardware-marvell-wlan.patch  Building Android images          $: cd  android_build          $: source build/envsetup.sh          $: lunch evk_8mn-userdebug          $: make 

Quick notes on testing audio on the i.MX 8QuadMax MEK board with 4.19.35-1.1.0 BSP. Hardware:   - Connect the MCIMX8QM-CPU to the MCIMX8-8X-BB.  - Connect the IMX-AUD-IO to the Audio Slot 1 on the MCIMX8-8X-BB.  - Short 2 and 3 on J47 on the MCIMX8-8X-BB  - Connect an external powered speaker to RCA connectors Audio OUT FR and/or Audio OUT FL on the IMX-AUD-IO  - Optionally, connect a headphone on J15 on the MCIMX8QM-CPU   Test: Power on the board. aplay -l shows the audio interface available. root@imx8qmmek:~# aplay -l **** List of PLAYBACK Hardware Devices **** card 0: cs42888audio [cs42888-audio], device 0: HiFi cs42888-0 [] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: cs42888audio [cs42888-audio], device 1: HiFi-ASRC-FE (*) [] Subdevices: 1/1 Subdevice #0: subdevice #0 card 1: wm8960audio [wm8960-audio], device 0: HiFi wm8960-hifi-0 [] Subdevices: 1/1 Subdevice #0: subdevice #0 card 2: imxaudmix [imx-audmix], device 0: HiFi-AUDMIX-FE (*) [] Subdevices: 1/1 Subdevice #0: subdevice #0 card 2: imxaudmix [imx-audmix], device 1: HiFi-AUDMIX-FE (*) [] Subdevices: 1/1 Subdevice #0: subdevice #0 Play file on powered speaker via cs42888: root@imx8qmmek:~# aplay -Dhw:0,0 test.wav Playing WAVE 'test.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo Play file on headphone via wm8960: root@imx8qmmek:~# aplay -Dhw:1,0 test.wav

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About softISP Code : https://github.com/NXPmicro/gtec-demo-framework/tree/master/DemoApps/OpenCL/SoftISP/source Document : https://www.nxp.com/docs/en/application-note/AN12060.pdf demo is on path  /opt/imx-gpu-sdk/OpenCL/SoftISP of linux L4.19.35   About eIQ Community: https://community.nxp.com/community/eiq eIQ sample APPs : https://community.nxp.com/docs/DOC-343785 eIQ library source code : https://source.codeaurora.org/external/imx/meta-fsl-bsp-release/tree/imx/meta-ml/recipes-libraries?h=warrior-4.19.35-1.1.0

[中文翻译版] 见附件   原文链接： https://community.nxp.com/docs/DOC-343242 

[中文翻译版] 见附件   原文链接： https://community.nxp.com/docs/DOC-343344 

[中文翻译版] 见附件   原文链接： https://community.nxp.com/docs/DOC-343372 

[中文翻译版] 见附件   原文链接： https://community.nxp.com/docs/DOC-343273 

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