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BSP: L5.15.5_1.0.0 Platform: i.MX8MPlus EVK Background   The function lpddr4_mr_read in BSP always return zero and this casue the customer can't use it to read MR registers in DRAM. This is a simple demo for reading MR registers. Patch Code   diff --git a/arch/arm/include/asm/arch-imx8m/ddr.h b/arch/arm/include/asm/arch-imx8m/ddr.h index 0f1e832c03..fd68996a23 100644 --- a/arch/arm/include/asm/arch-imx8m/ddr.h +++ b/arch/arm/include/asm/arch-imx8m/ddr.h @@ -721,6 +721,8 @@ int wait_ddrphy_training_complete(void); void ddrphy_init_set_dfi_clk(unsigned int drate); void ddrphy_init_read_msg_block(enum fw_type type); +unsigned int lpddr4_mr_read(unsigned int mr_rank, unsigned int mr_addr); + void update_umctl2_rank_space_setting(unsigned int pstat_num); void get_trained_CDD(unsigned int fsp); diff --git a/board/freescale/imx8mp_evk/spl.c b/board/freescale/imx8mp_evk/spl.c index 33bbbc09ac..85e40ffbbe 100644 --- a/board/freescale/imx8mp_evk/spl.c +++ b/board/freescale/imx8mp_evk/spl.c @@ -150,6 +150,40 @@ int board_fit_config_name_match(const char *name) return 0; } #endif +void lpddr4_get_info() +{ + int i = 0, attempts = 5; + + unsigned int ddr_info = 0; + unsigned int regs[] = { 5, 6, 7, 8 }; + + for(i = 0; i < ARRAY_SIZE(regs); i++){ + unsigned int data = 0; + data = lpddr4_mr_read(0xF,regs[i]); + ddr_info <<= 8; + ddr_info += (data & 0xFF); + switch (i) + { + case 0: + printf("DRAM INFO : Manufacturer ID = 0x%x",ddr_info); + if(ddr_info & 0Xff) + printf(", Micron\n"); + break; + case 1: + printf("DRAM INFO : Revision ID1 = 0x%x\n",ddr_info); + break; + case 2: + printf("DRAM INFO : Revision ID2 = 0x%x\n",ddr_info); + break; + case 3: + printf("DRAM INFO : I/O Width and Density = 0x%x\n",ddr_info); + break; + default: + break; + } + } + +} void board_init_f(ulong dummy) { @@ -187,6 +221,8 @@ void board_init_f(ulong dummy) /* DDR initialization */ spl_dram_init(); + + lpddr4_get_info(); board_init_r(NULL, 0); } diff --git a/drivers/ddr/imx/imx8m/ddrphy_utils.c b/drivers/ddr/imx/imx8m/ddrphy_utils.c index 326b92d784..f45eeaf552 100644 --- a/drivers/ddr/imx/imx8m/ddrphy_utils.c +++ b/drivers/ddr/imx/imx8m/ddrphy_utils.c @@ -194,8 +194,15 @@ unsigned int lpddr4_mr_read(unsigned int mr_rank, unsigned int mr_addr) tmp = reg32_read(DRC_PERF_MON_MRR0_DAT(0)); } while ((tmp & 0x8) == 0); tmp = reg32_read(DRC_PERF_MON_MRR1_DAT(0)); - tmp = tmp & 0xff; reg32_write(DRC_PERF_MON_MRR0_DAT(0), 0x4); + + while (tmp) { //try to find a significant byte in the word + if (tmp & 0xff) { + tmp &= 0xff; + break; + } + tmp >>= 8; + } return tmp; }     Test Result  
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 This article instruct customer how to develop on i.MX8MP NPU and how to debug performance. 
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    The meta layer is designed for those guys who want to use i.MX8M series SOC and Yocto system to develop AGV and Robot.    The platform includes some key components: 1, ROS1 (kinetic, melodic) and ROS2(dashing, eloquent, foxy) 2, Real-time Linux solution : Xenomai 3.1 with ipipe 5.4.47 patch 3, Industrial protocol : libmodbus, linuxptp, ros-canopen, EtherCAT(TBD) 4, Security: Enhanced OpenSSL, Enhanced GmSSL, Enhanced eCryptfs, secure key store, secure boot(TBD), SE-Linux(TBD),  Dm-verity(TBD) The first release bases on i.MX Yocto release L5.4.47 2.2.0 and You need download Linux 5.4.47_2.2.0 according to​​ https://www.nxp.com/docs/en/user-guide/IMX_YOCTO_PROJECT_USERS_GUIDE.pdf  firstly. And then you can follow the below guide to build and test ROS and Xenomai. A, clone meta-robot-platform from gitee.com git clone https://gitee.com/zxd2021-imx/meta-robot-platform.git git checkout v0.1-L5.4.47-2.2.0 B, Adding the meta-robot-platform layer to your build 1,  copy meta-robot-platform into <i.MX Yocto folder>/source 2, You should create a symbol link: setup-imx-robot.sh -> sources/meta-robot-platform/imx/meta-robot/tools/setup-imx-robot.sh C, How to build Robot image (example for i.MX8MQ EVK board) $ DISTRO=imx-robot-xwayland MACHINE=imx8mqevk source setup-imx-robot.sh -r kinetic -b imx8mqevk-robot-kinetic [or DISTRO=imx-robot-xwayland MACHINE=imx8mqevk source setup-imx-robot.sh -r melodic -b imx8mqevk-robot-melodic ] [or DISTRO=imx-robot-xwayland MACHINE=imx8mqevk source setup-imx-robot.sh -r dashing -b imx8mqevk-robot-dashing ] [or DISTRO=imx-robot-xwayland MACHINE=imx8mqevk source setup-imx-robot.sh -r eloquent -b imx8mqevk-robot-eloquent ] [or DISTRO=imx-robot-xwayland MACHINE=imx8mqevk source setup-imx-robot.sh -r foxy -b imx8mqevk-robot-foxy ] $ bitbake imx-robot-core [or bitbake imx-robot-system ] [or bitbake imx-robot-sdk ] And if you add XENOMAI_KERNEL_MODE = "cobalt" or XENOMAI_KERNEL_MODE = "mercury" in local.conf, you also can build real-time image with Xenomai by the below command: $ bitbake imx-robot-core-rt [or bitbake imx-robot-system-rt ] D, Robot image sanity testing //ROS1 Sanity Test #source /opt/ros/kinetic/setup.sh [or # source /opt/ros/melodic/setup.sh ] #echo $LD_LIBRARY_PATH #roscore & #rosnode list #rostopic list #only kinetic #rosmsg list #rosnode info /rosout //ROS2 Sanity Test #source ros_setup.sh #echo $LD_LIBRARY_PATH #ros2 topic list #ros2 msg list #only dashing #ros2 interface list #(sleep 5; ros2 topic pub /chatter std_msgs/String "data: Hello world") & #ros2 topic echo /chatter E, Xenomai sanity testing #/usr/xenomai/demo/cyclictest -p 50 -t 5 -m -n -i 1000 F, vSLAM demo You can find orb-slam2 demo under <i.MX Yocto folder>/sources/meta-robot-platform/imx/meta-robot/recipes-demo/orb-slam2. You should choose DISTRO=imx-robot-xwayland due to it depends on OpenCV with gtk+.   //////////////////////////////////////// update for Yocto L5.4.70 2.3.0  /////////////////////////////////////////////////////////// New release package meta-robot-platform-v0.2-L5.4.70-2.3.0 for Yocto release L5.4.70 2.3.0 and it supports i.MX8M series (8MQ,8MM,8MN and 8MP) and i.MX8QM/QXP.  git clone https://gitee.com/zxd2021-imx/meta-robot-platform.git git checkout v0.2-L5.4.70-2.3.0 Updating: 1, Support i.MX8QM and i.MX8QXP 2, Add ROS driver of RPLIDAR and Orbbec 3D cameras in ROS1 3, Upgrade OpenCV to 3.4.13. 4, Add imx-robot-agv image with orb-slam2 demo 5, Fix the issue which failed to create image when adding orb-slam2 6, Fix the issue which failed to create imx-robot sdk image when add package ISP and ML Note: Currently, orb-slam2 demo don't run on i.MX8MM platform due to its GPU don't support OpenGL ES3. imx-robot-sdk image is just for building ROS package on i.MX board, not  for cross-compile. You can try "bitbake imx-robot-system -c populate_sdk" to create cross-compile sdk without gmssl-bin. diff --git a/imx/meta-robot/recipes-core/images/imx-robot-system.bb b/imx/meta-robot/recipes-core/images/imx-robot-system.bb index 1991ab10..68f9ad31 100644 --- a/imx/meta-robot/recipes-core/images/imx-robot-system.bb +++ b/imx/meta-robot/recipes-core/images/imx-robot-system.bb @@ -35,7 +35,7 @@ CORE_IMAGE_EXTRA_INSTALL += " \ ${@bb.utils.contains('DISTRO_FEATURES', 'x11 wayland', 'weston-xwayland xterm', '', d)} \ ${ISP_PKGS} \ " -IMAGE_INSTALL += " clblast openblas libeigen opencv gmssl-bin" +IMAGE_INSTALL += " clblast openblas libeigen opencv" IMAGE_INSTALL += " \ ${ML_PKGS} \   //////////////////////////////////////// update for Yocto L5.4.70 2.3.2  /////////////////////////////////////////////////////////// New release package meta-robot-platform-v0.3-L5.4.70-2.3.2 for Yocto release L5.4.70 2.3.2 .  git clone https://gitee.com/zxd2021-imx/meta-robot-platform.git git checkout v0.3-L5.4.70-2.3.2 Updated: 1, Upgrade to L5.4.70-2.3.2 2, Enable xenomai rtdm driver 3, Add NXP Software Content Register and BSP patches of i.MX8M Plus AI Robot board. Note: How to build for AI Robot board 1, DISTRO=imx-robot-wayland MACHINE=imx8mp-ddr4-ipc source setup-imx-robot.sh -r melodic -b imx8mp-ddr4-ipc-robot-melodic 2, Add BBLAYERS += " ${BSPDIR}/sources/meta-robot-platform/imx/meta-imx8mp-ai-robot " in bblayers.conf 3, bitbake imx-robot-sdk or bitbake imx-robot-agv   //////////////////////////////////////// update for v1.0-L5.4.70-2.3.2  /////////////////////////////////////////////////////////// New release package meta-robot-platform-v1.0-L5.4.70-2.3.2 .  git clone https://gitee.com/zxd2021-imx/meta-robot-platform.git git checkout v1.0-L5.4.70-2.3.2 Updated: 1, Upgrade ROS1 Kinetic Kame to Release 2021-05-11 which is final sync. 2, Add IgH EtherCAT Master for Linux in i.MX Robot platform. //////////////////////////////////////// update for v1.1-L5.4.70-2.3.2  /////////////////////////////////////////////////////////// New release package meta-robot-platform-v1.1-L5.4.70-2.3.2 .  git clone https://gitee.com/zxd2021-imx/meta-robot-platform.git git checkout v1.1-L5.4.70-2.3.2 Updated: 1, Add more packages passed building in ROS1 Kinetic Kame. 2, Change the board name (From IPC to AI-Robot) in Uboot and kernel for i.MX8M Plus AI Robot board. You can use the below setup command to build ROS image for AI Robot board: DISTRO=imx-robot-xwayland MACHINE=imx8mp-ai-robot source setup-imx-robot.sh -r kinetic -b imx8mp-ai-robot-robot-kinetic DISTRO=imx-robot-xwayland MACHINE=imx8mp-ai-robot source setup-imx-robot.sh -r melodic -b imx8mp-ai-robot-robot-melodic DISTRO=imx-robot-xwayland MACHINE=imx8mp-ai-robot source setup-imx-robot.sh -r dashing -b imx8mp-ai-robot-robot-dashing DISTRO=imx-robot-xwayland MACHINE=imx8mp-ai-robot source setup-imx-robot.sh -r eloquent -b imx8mp-ai-robot-robot-eloquent DISTRO=imx-robot-xwayland MACHINE=imx8mp-ai-robot source setup-imx-robot.sh -r foxy -b imx8mp-ai-robot-robot-foxy BTW, you should add BBLAYERS += " ${BSPDIR}/sources/meta-robot-platform/imx/meta-imx8mp-ai-robot " in conf/bblayers.conf.   //////////////////////////////////////// update for v1.2-L5.4.70-2.3.3  /////////////////////////////////////////////////////////// New release package meta-robot-platform-v1.2-L5.4.70-2.3.3 .  git clone https://gitee.com/zxd2021-imx/meta-robot-platform.git git checkout v1.2-L5.4.70-2.3.3 Updated: 1, Update to Yocto release L5.4.70-2.3.3 2, Enable RTNet FEC driver, test on i.MX8M Mini EVK and i.MX8M Plus EVK. For the detailed information,  Please refer to the community post 移植实时Linux方案Xenomai到i.MX ARM64平台 (Enable Xenomai on i.MX ARM64 Platform)    //////////////////////////////////////// update for v2.1-L5.10.52-2.1.0  /////////////////////////////////////////////////////////// New release package meta-robot-platform-v2.1-L5.10.52-2.1.0 .  git clone https://gitee.com/zxd2021-imx/meta-robot-platform.git git checkout v2.1.1-L5.10.52-2.1.0 Updated: 1, Update to Yocto release L5.10.52-2.1.0 2, Add ROS1 noetic, ROS2 galactic and rolling 3, Upgrade Xenomai to v3.2 4, Add vSLAM demo orb-slam3 5, Upgrade OpenCV to 3.4.15 for ROS1 A, Adding the meta-robot-platform layer to your build 1,  copy meta-robot-platform into <i.MX Yocto folder>/source 2, You should create a symbol link: setup-imx-robot.sh -> sources/meta-robot-platform/imx/meta-robot/tools/setup-imx-robot.sh B, How to build Robot image (example for i.MX8M Plus EVK board) $ DISTRO=imx-robot-xwayland MACHINE=imx8mpevk source setup-imx-robot.sh -r kinetic -b imx8mpevk-robot-kinetic [or DISTRO=imx-robot-xwayland MACHINE=imx8mpevk source setup-imx-robot.sh -r melodic -b imx8mpevk-robot-melodic ] [or DISTRO=imx-robot-xwayland MACHINE=imx8mpevk source setup-imx-robot.sh -r noetic-b imx8mpevk-robot-noetic] [or DISTRO=imx-robot-xwayland MACHINE=imx8mpevk source setup-imx-robot.sh -r dashing -b imx8mpevk-robot-dashing ] [or DISTRO=imx-robot-xwayland MACHINE=imx8mpevk source setup-imx-robot.sh -r eloquent -b imx8mpevk-robot-eloquent ] [or DISTRO=imx-robot-xwayland MACHINE=imx8mpevk source setup-imx-robot.sh -r foxy -b imx8mpevk-robot-foxy ] [or DISTRO=imx-robot-xwayland MACHINE=imx8mpevk source setup-imx-robot.sh -r galactic -b imx8mpevk-robot-galactic ] [or DISTRO=imx-robot-xwayland MACHINE=imx8mpevk source setup-imx-robot.sh -r rolling -b imx8mpevk-robot-rolling ] $ bitbake imx-robot-agv [or bitbake imx-robot-cor ] [or bitbake imx-robot-system ] [or bitbake imx-robot-sdk ]   //////////////////////////////////////// update for v2.2-L5.10.72-2.2.0  /////////////////////////////////////////////////////////// New release package meta-robot-platform-v2.2-L5.10.72-2.2.0 .  git clone https://gitee.com/zxd2021-imx/meta-robot-platform.git git checkout v2.2.0-L5.10.72-2.2.0 Updated: 1, Update to Yocto release L5.10.72-2.2.0
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     The following steps allow you to build a bootable image in two different ways and also how to enable and use SCFW debug monitor. There are four files needed to generate a bootable image: ├── bl31 . bin ├── u - boot . bin   ├── mx8qm - ahab - container . img     └── scfw_tcm . bin There are some ways to get the four files, one way is with Yocto and other way is with stand alone build. Get the four files needed to generate a bootable image with Yocto.   To get the four files needed with Yocto, you have to build an i.MX 8QuadMax image, maybe some steps are not necessary. 1.-Host packages. sudo apt-get install gawk wget git-core diffstat unzip texinfo gcc-multilib \ build-essential chrpath socat cpio python python3 python3-pip python3-pexpect \ xz-utils debianutils iputils-ping python3-git python3-jinja2 libegl1-mesa \ libsdl1.2-dev pylint3 xterm rsync curl 2.-Setting up the Repo utility. 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 3.-Yocto Project Setup. git config --global user.name "Your Name" git config --global user.email "Your Email" git config --list mkdir imx-yocto-bsp cd imx-yocto-bsp repo init -u https://source.codeaurora.org/external/imx/imx-manifest -b imx-linux-hardknott -m imx-5.10.72-2.2.0.xml repo sync 4.-Build configurations. DISTRO=fsl-imx-xwayland MACHINE=imx8qmmek source imx-setup-release.sh -b imx8qmmek 5.-Building an image. bitbake imx-image-full The four files needed to generate a bootable image are in: ~/imx-yocto-bsp/imx8qmmek/tmp/deploy/images/imx8qmmek/imx-boot-tools Note: With Yocto you can not enable the SCFW debug monitor. For more information see the i.MX Yocto Project User's Guide. Get the four files needed to generate a bootable image with stand alone build.   To build all required binaries from source you can use standard aarch64 Linux toolchain, on Ubuntu 20.04 LTS: sudo apt-get install gcc-aarch64-linux-gnu Get the bl31.bin file - Arm Trust Firmware.   Download source from: git clone -b lf-5.10.72-2.2.0 https://source.codeaurora.org/external/imx/imx-atf Build: cd imx-atf make clean PLAT=imx8qm CROSS_COMPILE=aarch64-linux-gnu- make PLAT=imx8qm CROSS_COMPILE=aarch64-linux-gnu- bl31 The compiled bl31.bin location: build/imx8qm/release/bl31.bin Get the u-boot.bin file - u-boot.   Download source from: git clone -b lf-5.10.72-2.2.0 https://source.codeaurora.org/external/imx/uboot-imx Build: cd uboot-imx make ARCH=arm CROSS_COMPILE=aarch64-linux-gnu- imx8qm_mek_defconfig make ARCH=arm CROSS_COMPILE=aarch64-linux-gnu- The compiled u-boot.bin location: ./u-boot.bin Get the mx8qmb0-ahab-container.img file - iMX Seco. wget https://www.nxp.com/lgfiles/NMG/MAD/YOCTO/imx-seco-3.7.4.bin chmod +x imx-seco-3.7.4.bin ./imx-seco-3.7.4.bin --auto-accept The mx8qmb0-ahab-container.img file location: imx-seco-3.7.4/firmware/seco/mx8qmb0-ahab-container.img Get the scfw_tcm.bin file - SCFW.   Download and Install a GNU Toolchain.   Look at the packages/imx-scfw-porting-kit-1.7.4/doc/pdf/ , chapter Porting Guide, sub-chapter Tool Chain to check which GNU Toolchain version corresponds to the SCFW you are building. The imx-scfw-porting-kit-1.7.4 version uses the GNU Toolchain version gcc-arm-none-eabi-8-2018-q4-major . It is recommended to install toolchain in “opt” folder: cd /opt sudo wget https://developer.arm.com/-/media/Files/downloads/gnu-rm/8-2018q4/gcc-arm-none-eabi-8-2018-q4-major-linux.tar.bz2 sudo tar xjf gcc-arm-none-eabi-8-2018-q4-major-linux.tar.bz2 Download and Install a Arm GCC toolchain. It is recommended to install toolchain in “opt” folder: sudo wget https://releases.linaro.org/components/toolchain/binaries/7.3-2018.05/aarch64-linux-gnu/gcc-linaro-7.3.1-2018.05-x86_64_aarch64-linux-gnu.tar.xz sudo tar -Jxvf gcc-linaro-7.3.1-2018.05-x86_64_aarch64-linux-gnu.tar.xz After installing the toolchain, set up the environment variable relevant for building. export ARCH=arm CROSS_COMPILE=/opt/gcc-linaro-7.3.1-2018.05-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu- export TOOLS=/opt Build the scfw_tcm.bin file. cd ~ wget https://www.nxp.com/lgfiles/NMG/MAD/YOCTO/imx-scfw-porting-kit-1.7.4.bin chmod +x imx-scfw-porting-kit-1.7.4.bin ./imx-scfw-porting-kit-1.7.4.bin --auto-accept cd imx-scfw-porting-kit-1.7.4/src Extract the desired scfw porting kit: tar -xvf scfw_export_mx8qm_b0.tar.gz cd scfw_export_mx8qm_b0/ Build without debug monitor: make clean make qm B=mek R=B0 Build with debug monitor: make clean make qm B=mek D=1 M=1 R=B0 DDR_CON=imx8qm_dcd_1.6GHz The scfw_tcm.bin file location: build_mx8qm_b0/scfw_tcm.bin   Generate the bootable image.   Once you have the four files needed to generate a bootable image, use imx-mkimage tool. Download source from: git clone -b lf-5.10.72-2.2.0 https://source.codeaurora.org/external/imx/imx-mkimage Copy the four binaries to iMX8QM folder. You have to rename some files. If you got the four binaries with Yocto. cp ~/imx-yocto-bsp/imx8qmmek/tmp/deploy/images/imx8qmmek/imx-boot-tools/bl31-imx8qm.bin ~/imx-mkimage/iMX8QM/bl31.bin cp ~/imx-yocto-bsp/imx8qmmek/tmp/deploy/images/imx8qmmek/imx-boot-tools/u-boot-imx8qmmek.bin-sd ~/imx-mkimage/iMX8QM/u-boot.bin cp ~/imx-yocto-bsp/imx8qmmek/tmp/deploy/images/imx8qmmek/imx-boot-tools/mx8qmb0-ahab-container.img ~/imx-mkimage/iMX8QM cp ~/imx-yocto-bsp/imx8qmmek/tmp/deploy/images/imx8qmmek/imx-boot-tools/mx8qm-mek-scfw-tcm.bin ~/imx-mkimage/iMX8QM/scfw_tcm.bin If you got the four binaries with stand alone build. cp ~/imx-atf/build/imx8qm/release/bl31.bin ~/imx-mkimage/iMX8QM cp ~/uboot-imx/u-boot.bin ~/imx-mkimage/iMX8QM cp ~/imx-seco-3.7.4/firmware/seco/mx8qmb0-ahab-container.img ~/imx-mkimage/iMX8QM cp ~/imx-scfw-porting-kit-1.7.4/src/scfw_export_mx8qm_b0/build_mx8qm_b0/scfw_tcm.bin ~/imx-mkimage/iMX8QM Build the bootable image. cd ~/imx-mkimage make SOC=iMX8QM flash The compiled file is flash.bin and its location is: iMX8QM/flash.bin   Flash the bootable image.   To flash the bootable image follow the next steps: -Copy the flash.bin and uuu.exe in a folder. -Change SW2 on the base board to 000100 (from MSB to LSB, 1-ON and 0-OFF) to boot from the Serial Downloader. -Run the following command in Command Prompt: uuu.exe -b sd flash.bin -Power on the MEK CPU board.   SCFW debug monitor.        If the SCFW is compiled using the M=1 option (default is M=0) then it will include a debug monitor. This can be used to R/W memory or registers, R/W power state, and dump some resource manager state. Production SCFW should never have the monitor enabled (M=0, the default)!      The debug monitor allows command-line interaction via the SCU UART. Inclusion of the debug monitor affects SCFW timing and therefore should never be deployed in a product! Note the terminal needs to be in a mode that sends CR or LF for a new line (not CR+LF). The following commands are supported: Command                                   Description exit                                              exit the debug monitor quit                                              exit the debug monitor reset [mode]                                request reset with mode (default = board) reboot partition [type]                  request partition reboot with type (default = cold) md.b address [count]                  display count bytes at address md.w address [count]                 display count words at address md[.l] address [count]                 display count long-words at address mm.b address value                   modify byte at address mm.w address value                  modify word at address mm[.l] address value                  modify long-word at address ai.r ss sel addr                            read analog interface (AI) register ai.w ss sel addr data                  write analog interface (AI) register fuse.r word                                 read OTP fuse word fuse.w word value                      write value to OTP fuse word dump rm                                    dump all the resource manager (RM) info dump rm part [part]                    dump all partition info for part (default = all) dump rm rsrc [part]                    dump all resource info for part (default = all) dump rm mem [part]                  dump all memory info for part (default = all) dump rm pad [part]                    dump all pad info for part (default = all) power.r [resource]                     read/get power mode of resource (default = all) power.w resource mode            write/set power mode of resource to mode (off, stby, lp, on) info                                             display SCFW/SoC info like unique ID, etc. seco lifecycle change                send SECO lifecycle update command (change) to SECO seco info                                    display SECO info like Lifecycle, SNVS state, etc. seco debug                                dump SECO debug log seco events                               dump SECO event log seco commit                              commit SRK and/or SECO FW version update pmic.r id reg                               read pmic register pmic.w id reg val                        write pmic register pmic.l id                                      list pmic info (rail voltages, etc) Resource and subsystem (ss) arguments are specified by name. All numeric arguments are decimal unless prefixed with 0x (for hex) or 0 (for octal). Testing SCFW debug monitor to display count long-words at address on Linux side and on SCU side. -Change SW2 on the base board to 001100 (from MSB to LSB, 1-ON and 0-OFF) to boot from the SD card. -Power on the MEK CPU board. -Open Tera Term and you will see: Hello from SCU ( Build 5263 , Commit 9 b3d006e , Aug 20 2021 12 : 20 : 10 ) ​ DDR frequency = 1596000000   ROM boot time = 262368 usec       Boot time = 24583 usec         Banner = 10 usec           Init = 9038 usec         Config = 3232 usec             DDR = 2677 usec         SConfig = 444 usec           Prep = 5039 usec ​ *** Debug Monitor *** ​ > $ -Run the following commands: power.r power.w db on power.w dblogic on power.w mu_1a on -Example reading on Linux side: md.l 0x5d1c0000 10 -You will see: > $ md . l 0x5d1c0000 10 5 d1c0000 : 00000000 00000000 00000000 00000000 5 d1c0010 : 00010201 23 c34600 d63fdb21 00000000 5 d1c0020 : 00f00200 18000000 -Example reading on SCU side: md.l 0x41cac080 10 -You will see: > $ md . l 0x41cac080 10 41 cac080 : 00000000 00000000 00000000 00000000 41 cac090 : 0 d070201 ff0001f1 ffff8000 ffff00fb 41 cac0a0 : 00f00000 18000000 For more information see the System Controller Firmware Porting Guide.
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  Just sharing some experiences during the development and studying.   Although, it appears some hardwares, it focuses on software to speed up your developing on your  hardware.     杂记共享一下在开发和学习过程中的经验。    虽然涉及一些硬件,但其本身关注软件,希望这些能加速您在自己硬件上的开发。   02/16/2022 mx8_ddr_stress_test without UI   https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/mx8-ddr-stress-test-without-UI/ta-p/1414090   12/23/2021 i.MX8 i.MX8X Board Reset https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/i-MX8-i-MX8X-Board-Reset/ta-p/1391130       12/21/2021 regulator userspace-consumer https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/regulator-userspace-consumer/ta-p/1389948     11/24/2021 crypto af_alg blackkey demo crypto af_alg blackkey demo - NXP Community   09/28/2021 u-boot runtime modify Linux device tree(dtb) u-boot runtime modify Linux device tree(dtb) - NXP Community     08/17/2021 gpio-poweroff demo https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/gpio-poweroff-demo/ta-p/1324306         08/04/2021 How to use gpio-hog demo https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/How-to-use-gpio-hog-demo/ta-p/1317709       07/14/2021 SWUpdate OTA i.MX8MM EVK / i.MX8QXP MEK https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/SWUpdate-OTA-i-MX8MM-EVK-i-MX8QXP-MEK/ta-p/1307416     04/07/2021 i.MX8QXP eMMC Secondary Boot https://community.nxp.com/t5/i-MX-Community-Articles/i-MX8QXP-eMMC-Secondary-Boot/ba-p/1257704#M45       03/25/2021 sc_misc_board_ioctl to access the M4 partition from A core side sc_misc_board_ioctl to access the M4 partition fr... - NXP Community     03/17/2021 How to Changei.MX8X MEK+Base Board  Linux Debug UART https://community.nxp.com/t5/i-MX-Community-Articles/How-to-Change-i-MX8X-MEK-Base-Board-Linux-Debug-UART/ba-p/1246779#M43     03/16/2021 How to Change i.MX8MM evk Linux Debug UART https://community.nxp.com/t5/i-MX-Community-Articles/How-to-Change-i-MX8MM-evk-Linux-Debug-UART/ba-p/1243938#M40       05/06/2020 Linux fw_printenv fw_setenv to access U-Boot's environment variables Linux fw_printenv fw_setenv to access U-Boot's env... - NXP Community     03/30/2020 i.MX6 DDR calibration/stress for Mass Production https://community.nxp.com/docs/DOC-346065     03/25/2020 parseIVT - a script to help i.MX6 Code Signing https://community.nxp.com/docs/DOC-345998     02/17/2020 Start your machine learning journey from tensorflow playground Start your machine learning journey from tensorflow playground      01/15/2020 How to add  iMX8QXP PAD(GPIO) Wakeup How to add iMX8QXP PAD(GPIO) Wakeup    01/09/2020 Understand iMX8QX Hardware Partitioning By Making M4 Hello world Running Correctly https://community.nxp.com/docs/DOC-345359   09/29/2019 Docker On i.MX6UL With Ubuntu16.04 https://community.nxp.com/docs/DOC-344462   09/25/2019 Docker On i.MX8MM With Ubuntu https://community.nxp.com/docs/DOC-344473 Docker On i.MX8QXP With Ubuntu https://community.nxp.com/docs/DOC-344474     08/28/2019 eMMC5.0 vs eMMC5.1 https://community.nxp.com/docs/DOC-344265     05/24/2019 How to upgrade  Linux Kernel and dtb on eMMC without UUU How to upgrade Linux Kernel and dtb on eMMC without UUU     04/12/2019 eMMC RPMB Enhance and GP https://community.nxp.com/docs/DOC-343116   04/04/2019 How to Dump a GPT SDCard Mirror(Android O SDCard Mirror) https://community.nxp.com/docs/DOC-343079   04/04/2019 i.MX Create Android SDCard Mirror https://community.nxp.com/docs/DOC-343078   04/02/2019: i.MX Linux Binary_Demo Files Tips  https://community.nxp.com/docs/DOC-343075   04/02/2019:       Update Set fast boot        eMMC_RPMB_Enhance_and_GP.pdf   02/28/2019: imx_builder --- standalone build without Yocto https://community.nxp.com/docs/DOC-342702   08/10/2018: i.MX6SX M4 MPU Settings For RPMSG update    Update slide CMA Arrangement Consideration i.MX6SX_M4_MPU_Settings_For_RPMSG_08102018.pdf   07/26/2018 Understand ML With Simplest Code https://community.nxp.com/docs/DOC-341099     04/23/2018:     i.MX8M Standalone Build     i.MX8M Standalone Build.pdf     04/13/2018:      i.MX6SX M4 MPU Settings For RPMSG  update            Add slide CMA Arrangement  Consideration     i.MX6SX_M4_MPU_Settings_For_RPMSG_04132018.pdf   09/05/2017:       Update eMMC RPMB, Enhance  and GP       eMMC_RPMB_Enhance_and_GP.pdf 09/01/2017:       eMMC RPMB, Enhance  and GP       eMMC_RPMB_Enhance_and_GP.pdf 08/30/2017:     Dual LVDS for High Resolution Display(For i.MX6DQ/DLS)     Dual LVDS for High Resolution Display.pdf 08/27/2017:  L3.14.28 Ottbox Porting Notes:         L3.14.28_Ottbox_Porting_Notes-20150805-2.pdf MFGTool Uboot Share With the Normal Run One:        MFGTool_Uboot_share_with_NormalRun_sourceCode.pdf Mass Production with programmer        Mass_Production_with_NAND_programmer.pdf        Mass_Production_with_emmc_programmer.pdf AndroidSDCARDMirrorCreator https://community.nxp.com/docs/DOC-329596 L3.10.53 PianoPI Porting Note        L3.10.53_PianoPI_PortingNote_151102.pdf Audio Codec WM8960 Porting L3.10.53 PianoPI        AudioCodec_WM8960_Porting_L3.10.53_PianoPI_151012.pdf TouchScreen PianoPI Porting Note         TouchScreen_PianoPI_PortingNote_151103.pdf Accessing GPIO From UserSpace        Accessing_GPIO_From_UserSpace.pdf        https://community.nxp.com/docs/DOC-343344 FreeRTOS for i.MX6SX        FreeRTOS for i.MX6SX.pdf i.MX6SX M4 fastup        i.MX6SX M4 fastup.pdf i.MX6 SDCARD Secondary Boot Demo        i.MX6_SDCARD_Secondary_Boot_Demo.pdf i.MX6SX M4 MPU Settings For RPMSG        i.MX6SX_M4_MPU_Settings_For_RPMSG_10082016.pdf Security        Security03172017.pdf    NOT related to i.MX, only a short memo
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We will build a remote debug environmet of Qt Creator in this user guide.   Contents 1 Change local.conf file in Yocto 2 2 Build and deploy Yocto SDK 2 2.1 Build full image SDK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2.2 Deploy SDK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 3 Configure QT Kit 2 3.1 Setup device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 3.2 Configure QT version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3.3 Configure gcc and g++ manually . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3.4 Configure gdb manually . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.5 Configure Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.6 Very important thing!! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Test result
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  1.overwrite  the sources/meta-freescale/recipes-security/optee-imx with optee-imx.zip 2.add below code to conf/local.conf DISTRO_FEATURES_append += " systemd" DISTRO_FEATURES_BACKFILL_CONSIDERED += "sysvinit" VIRTUAL-RUNTIME_init_manager = "systemd" VIRTUAL-RUNTIME_initscripts = "systemd-compat-units" MACHINE_FEATURES_append += "optee" DISTRO_FEATURES_append += "optee" IMAGE_INSTALL_append += "optee-test optee-os optee-client optee-examples" 3.bitbake optee-examples or bitbake imx-image-xxx You can directly install optee-examples_3.11.0-r0_arm64.deb in your device.  
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SWUpdate: Embedded Systems become more and more complex. Software for Embedded Systems have new features and fixes can be updated in a reliable way. Most of time, we need OTA(Over-The-Air) to upgrade the system. Like Android has its own update system. Linux also need an update system. SWUpdate project is thought to help to update an embedded system from a storage media or from network. However, it should be mainly considered as a framework, where further protocols or installers (in SWUpdate they are called handlers) can be easily added to the application. Mongoose daemon mode: Mongoose is a daemon mode of SWUpdate that provides a web server, web interface and web application. Mongoose is running on the target board(i.MX8MM EVK/i.MX8QXP MEK).Using Web browser to access it.   Suricatta daemon mode: Suricatta regularly polls a remote server for updates, downloads, and installs them. Thereafter, it reboots the system and reports the update status to the server. The screenshot is SWUpdate scuricatta working with hawkbit server.          
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    Xenomai is real-time framework, which can run seamlessly side-by-side Linux as a co-kernel system, or natively over mainline Linux kernels (with or without PREEMPT-RT patch). The dual kernel nicknamed Cobalt, is a significant rework of the Xenomai 2.x system. Cobalt implements the RTDM specification for interfacing with real-time device drivers. The native linux version, an enhanced implementation of the experimental Xenomai/SOLO work, is called Mercury. In this environment, only a standalone implementation of the RTDM specification in a kernel module is required, for interfacing the RTDM-compliant device drivers with the native kernel. You can get more detailed information from Home · Wiki · xenomai / xenomai · GitLab       I have ported xenomai 3.1 to i.MX Yocto 4.19.35-1.1.0, and currently support ARM64 and test on i.MX8MQ EVK board. I did over night test( 5 real-time threads + GPU SDK test case) and stress test by tool stress-ng on  i.MX8MQ EVK board. It looks lile pretty good. Current version (20200730) also support i.MX8MM EVK.     You need git clone https://gitee.com/zxd2021-imx/xenomai-arm64.git, and git checkout xenomai-4.19.35-1.1.0-20200818 (which inlcudes all patches and bb file) and add the following variable in conf/local.conf before build xenomai by command bitake xenomai.  XENOMAI_KERNEL_MODE = "cobalt"  PREFERRED_VERSION_linux-imx = "4.19-${XENOMAI_KERNEL_MODE}" IMAGE_INSTALL_append += " xenomai" or XENOMAI_KERNEL_MODE = "mercury" PREFERRED_VERSION_linux-imx = "4.19-${XENOMAI_KERNEL_MODE}" IMAGE_INSTALL_append += " xenomai" If XENOMAI_KERNEL_MODE = "cobalt", you can build dual kernel version. And If  XENOMAI_KERNEL_MODE = "mercury", it is single kernel with PREEMPT-RT patch. The following is test result by the command ( /usr/xenomai/demo/cyclictest -p 99 -t 5 -m -n -i 1000  -l 100000 😞 //Over normal Linux kernel without GPU SDK test case T: 0 ( 4220) P:99 I:1000 C: 100000 Min: 7 Act: 10 Avg: 9 Max: 23 T: 1 ( 4221) P:99 I:1500 C: 66672 Min: 7 Act: 10 Avg: 10 Max: 20 T: 2 ( 4222) P:99 I:2000 C: 50001 Min: 7 Act: 12 Avg: 10 Max: 81 T: 3 ( 4223) P:99 I:2500 C: 39998 Min: 7 Act: 11 Avg: 10 Max: 29 T: 4 ( 4224) P:99 I:3000 C: 33330 Min: 7 Act: 13 Avg: 10 Max: 26 //Over normal Linux kernel with GPU SDK test case T: 0 ( 4177) P:99 I:1000 C: 100000 Min: 7 Act: 10 Avg: 11 Max: 51 T: 1 ( 4178) P:99 I:1500 C: 66673 Min: 7 Act: 12 Avg: 10 Max: 35 T: 2 ( 4179) P:99 I:2000 C: 50002 Min: 7 Act: 12 Avg: 11 Max: 38 T: 3 ( 4180) P:99 I:2500 C: 39999 Min: 7 Act: 12 Avg: 11 Max: 42 T: 4 ( 4181) P:99 I:3000 C: 33330 Min: 7 Act: 12 Avg: 11 Max: 36   //Cobalt with stress-ng --cpu 4 --io 2 --vm 1 --vm-bytes 512M --timeout 600s --metrics-brief T: 0 ( 4259) P:50 I:1000 C:3508590 Min:      0 Act:    0 Avg:    0 Max:      42 T: 1 ( 4260) P:50 I:1500 C:2338831 Min:      0 Act:    1 Avg:    0 Max:      36 T: 2 ( 4261) P:50 I:2000 C:1754123 Min:      0 Act:    1 Avg:    1 Max:      42 T: 3 ( 4262) P:50 I:2500 C:1403298 Min:      0 Act:    1 Avg:    1 Max:      45 T: 4 ( 4263) P:50 I:3000 C:1169415 Min:      0 Act:    1 Avg:    1 Max:      22   //Cobalt without GPU SDK test case T: 0 ( 4230) P:50 I:1000 C: 100000 Min: 0 Act: 0 Avg: 0 Max: 4 T: 1 ( 4231) P:50 I:1500 C:   66676 Min: 0 Act: 1 Avg: 0 Max: 4 T: 2 ( 4232) P:50 I:2000 C:   50007 Min: 0 Act: 1 Avg: 0 Max: 8 T: 3 ( 4233) P:50 I:2500 C:   40005 Min: 0 Act: 1 Avg: 0 Max: 3 T: 4 ( 4234) P:50 I:3000 C:   33338 Min: 0 Act: 1 Avg: 0 Max: 5 //Cobalt with GPU SDK  test case T: 0 ( 4184) P:99 I:1000 C:37722968 Min: 0 Act: 1 Avg: 0 Max: 24 T: 1 ( 4185) P:99 I:1500 C:25148645 Min: 0 Act: 1 Avg: 0 Max: 33 T: 2 ( 4186) P:99 I:2000 C:18861483 Min: 0 Act: 1 Avg: 0 Max: 22 T: 3 ( 4187) P:99 I:2500 C:15089187 Min: 0 Act: 1 Avg: 0 Max: 23 T: 4 ( 4188) P:99 I:3000 C:12574322 Min: 0 Act: 1 Avg: 0 Max: 29 //Mercury without GPU SDK  test case T: 0 ( 4287) P:99 I:1000 C:1000000 Min: 6 Act: 7 Avg: 7 Max: 20 T: 1 ( 4288) P:99 I:1500 C:  666667 Min: 6 Act: 9 Avg: 7 Max: 17 T: 2 ( 4289) P:99 I:2000 C:  499994 Min: 6 Act: 8 Avg: 7 Max: 24 T: 3 ( 4290) P:99 I:2500 C:  399991 Min: 6 Act: 9 Avg: 7 Max: 19 T: 4 ( 4291) P:99 I:3000 C:  333322 Min: 6 Act: 8 Avg: 7 Max: 21 //Mercury with GPU SDK  test case T: 0 ( 4222) P:99 I:1000 C:1236790 Min: 6 Act: 7 Avg: 7 Max: 55 T: 1 ( 4223) P:99 I:1500 C:  824518 Min: 6 Act: 7 Avg: 7 Max: 44 T: 2 ( 4224) P:99 I:2000 C:  618382 Min: 6 Act: 8 Avg: 8 Max: 88 T: 3 ( 4225) P:99 I:2500 C:  494701 Min: 6 Act: 7 Avg: 8 Max: 49 T: 4 ( 4226) P:99 I:3000 C:  412247 Min: 6 Act: 7 Avg: 8 Max: 53 //////////////////////////////////////// Update for Yocto L5.4.47 2.2.0  /////////////////////////////////////////////////////////// New release for Yocto release L5.4.47 2.2.0 and it supports i.MX8M series (8MQ,8MM,8MN and 8MP). You need to git clone https://gitee.com/zxd2021-imx/xenomai-arm64.git,  and git checkout xenomai-5.4.47-2.2.0. You need to add the following variable in conf/local.conf before build xenomai by command bitake imx-image-multimedia.  XENOMAI_KERNEL_MODE = "cobalt"  PREFERRED_VERSION_linux-imx = "5-${XENOMAI_KERNEL_MODE}" IMAGE_INSTALL_append += " xenomai" or XENOMAI_KERNEL_MODE = "mercury" PREFERRED_VERSION_linux-imx = "5-${XENOMAI_KERNEL_MODE}" IMAGE_INSTALL_append += " xenomai" //////////////////////////////////////// Update for Yocto L5.4.70 2.3.0  /////////////////////////////////////////////////////////// New release  for Yocto release L5.4.70 2.3.0 and it supports i.MX8M series (8MQ,8MM,8MN and 8MP) and i.MX8QM/QXP. You need to git clone https://gitee.com/zxd2021-imx/xenomai-arm64.git and git checkout xenomai-5.4.70-2.3.0. Updating: 1, Support i.MX8QM and i.MX8QXP 2, Fix altency's the issue which uses legacy API to get time   //////////////////////////////////////// update for Yocto L5.4.70 2.3.2  /////////////////////////////////////////////////////////// New release for Yocto release L5.4.70 2.3.2. You need to git clone https://gitee.com/zxd2021-imx/xenomai-arm64.git, and git checkout xenomai-5.4.70-2.3.2. Updating: 1, Enable Xenomai RTDM driver in Linux Kernel 2, Currently CAN, UART, GPIO,  SPI and Ethernet (in debug for RTNet)  are added in Xenomai. 3, Add KERNEL_DEVICETREE += " freescale/imx8mp-rt-evk.dtb " in sources/meta-imx/meta-bsp/conf/machine/imx8mpevk.conf to enable relative device in Xenomai domain, for example rt-imx8mp-flexcan.   //////////////////////////////////////// Update for Yocto L5.4.70 2.3.3  /////////////////////////////////////////////////////////// New release for Yocto release L5.4.70 2.3.3. You need to git clonehttps://gitee.com/zxd2021-imx/xenomai-arm64.git and git checkout xenomai-5.4.70-2.3.3. Updating: 1, Enable RTNet FEC driver 2, Currently CAN, UART, GPIO,  SPI and Ethernet ( FEC Controller)  are added in Xenomai. 3, Add KERNEL_DEVICETREE += " freescale/imx8mp-rt-evk.dtb " in sources/meta-imx/meta-bsp/conf/machine/imx8mpevk.conf and KERNEL_DEVICETREE += " freescale/imx8mm-rt-ddr4-evk.dtb " in sources/meta-imx/meta-bsp/conf/machine/imx8mmddr4evk.conf to enable rt_fec device in Xenomai domain. Verifying the network connection by RTnet Ping Between i.MX8M Mini EVK and i.MX8M Plus EVK a, Setup test environment 1, Connect ENET1 of  i.MX8M Plus EVK (used as a master) and  ENET of i.MX8M Mini EVK (used as a slave) of  to a switch or hub 2, Modify /usr/xenomai/etc/rtnet.conf in i.MX8M Plus EVK board as the following: @@ -16,7 +16,7 @@ MODULE_EXT=".ko" # RT-NIC driver -RT_DRIVER="rt_eepro100" +RT_DRIVER="rt_fec" RT_DRIVER_OPTIONS="" # PCI addresses of RT-NICs to claim (format: 0000:00:00.0) @@ -30,8 +30,8 @@ REBIND_RT_NICS="" # The TDMA_CONFIG file overrides these parameters for masters and backup # masters. Leave blank if you do not use IP addresses or if this station is # intended to retrieve its IP from the master based on its MAC address. -IPADDR="10.0.0.1" -NETMASK="" +IPADDR="192.168.100.101" +NETMASK="255.255.255.0" # Start realtime loopback device ("yes" or "no") RT_LOOPBACK="yes" @@ -65,7 +65,7 @@ TDMA_MODE="master" # Master parameters # Simple setup: List of TDMA slaves -TDMA_SLAVES="10.0.0.2 10.0.0.3 10.0.0.4" +TDMA_SLAVES="192.168.100.102" # Simple setup: Cycle time in microsecond TDMA_CYCLE="5000" 3, Modify /usr/xenomai/etc/rtnet.conf in i.MX8M Mini EVK board as the following: @@ -16,7 +16,7 @@ MODULE_EXT=".ko" # RT-NIC driver -RT_DRIVER="rt_eepro100" +RT_DRIVER="rt_fec" RT_DRIVER_OPTIONS="" # PCI addresses of RT-NICs to claim (format: 0000:00:00.0) @@ -30,8 +30,8 @@ REBIND_RT_NICS="" # The TDMA_CONFIG file overrides these parameters for masters and backup # masters. Leave blank if you do not use IP addresses or if this station is # intended to retrieve its IP from the master based on its MAC address. -IPADDR="10.0.0.1" -NETMASK="" +IPADDR="192.168.100.102" +NETMASK="255.255.255.0" # Start realtime loopback device ("yes" or "no") RT_LOOPBACK="yes" @@ -59,13 +59,13 @@ STAGE_2_CMDS="" # TDMA mode of the station ("master" or "slave") # Start backup masters in slave mode, it will then be switched to master # mode automatically during startup. -TDMA_MODE="master" +TDMA_MODE="slave" # Master parameters # Simple setup: List of TDMA slaves -TDMA_SLAVES="10.0.0.2 10.0.0.3 10.0.0.4" +TDMA_SLAVES="192.168.100.102" # Simple setup: Cycle time in microsecond TDMA_CYCLE="5000" 4, rename imx8mm-rt-ddr4-evk.dtb to imx8mm-ddr4-evk.dtb in /run/media/mmcblk1p1,  rename imx8mp-rt-evk.dtb to imx8mp-evk.dtb in /run/media/mmcblk1p1, and reboot board. 5, Run the below command on i.MX8M Mini EVK board. cd /usr/xenomai/sbin/ ./rtnet start & 5, Run the below command on i.MX8M Plus EVK board. cd /usr/xenomai/sbin/ ./rtnet start & When you see the log (rt_fec_main 30be0000.ethernet (unnamed net_device) (uninitialized): Link is Up - 100Mbps/Full - flow control rx/tx) and you can run command "./rtroute" to check route table if the slave IP (192.168.100.102) is in route.. b, Verify the network connection using the command below: ./rtping -s 1024 192.168.100.102 //////////////////////////////////////// Update for Yocto L5.10.52 2.1.0  /////////////////////////////////////////////////////////// New release for Yocto release L10.52 2.1.0. You need to git clonehttps://gitee.com/zxd2021-imx/xenomai-arm64.git and git checkout xenomai-5.10.52-2.1.0. Updating: 1, Upgrade Xenomai to v3.2 2, Enable Dovetail instead of ipipe. Copy xenomai-arm64 to <Yocto folder>/sources/meta-imx/meta-bsp/recipes-kernel, and add the following variable in conf/local.conf before build Image with xenomai enable by command bitake imx-image-multimedia . XENOMAI_KERNEL_MODE = "cobalt" IMAGE_INSTALL_append += " xenomai" or XENOMAI_KERNEL_MODE = "mercury" IMAGE_INSTALL_append += " xenomai" Notice: If XENOMAI_KERNEL_MODE = "cobalt", you can build dual kernel version. And If XENOMAI_KERNEL_MODE = "mercury", it is single kernel with PREEMPT-RT patch.  Latency testing of Xenomai3.2+Dovetail with isolating CPU 2,3 ( Xenomai 3.2 on 8MM DDR4 EVK with GPU test case (GLES3/S08_EnvironmentMappingRefraction_Wayland) + iperf3 + 2 ping 65000 size + stress-ng --cpu 2 --io 2 --vm 1 --vm-bytes 256M --metrics-brief ) 😞 The following is test result by the command ( /usr/xenomai/demo/cyclictest -a 2,3 -p 50 -t 5 -m -n -i 1000) root@imx8mmddr4evk:~# /usr/xenomai/demo/cyclictest -a 2,3 -p 50 -t 5 -m -n -i 1000 # /dev/cpu_dma_latency set to 0us policy: fifo: loadavg: 5.96 6.04 6.03 7/155 1349 T: 0 ( 615) P:50 I:1000 C:63448632 Min: 0 Act: 0 Avg: 0 Max: 55 T: 1 ( 616) P:50 I:1500 C:42299087 Min: 0 Act: 0 Avg: 1 Max: 43 T: 2 ( 617) P:50 I:2000 C:31724315 Min: 0 Act: 0 Avg: 1 Max: 51 T: 3 ( 618) P:50 I:2500 C:25379452 Min: 0 Act: 0 Avg: 1 Max: 53 T: 4 ( 619) P:50 I:3000 C:21149543 Min: 0 Act: 0 Avg: 1 Max: 47        
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    Xenomai is real-time framework, which can run seamlessly side-by-side Linux as a co-kernel system, or natively over mainline Linux kernels (with or without PREEMPT-RT patch). The dual kernel nicknamed Cobalt, is a significant rework of the Xenomai 2.x system. Cobalt implements the RTDM specification for interfacing with real-time device drivers. The native linux version, an enhanced implementation of the experimental Xenomai/SOLO work, is called Mercury. In this environment, only a standalone implementation of the RTDM specification in a kernel module is required, for interfacing the RTDM-compliant device drivers with the native kernel. You can get more detailed information from Home · Wiki · xenomai / xenomai · GitLab       I have ported xenomai 3.1 to i.MX Yocto 4.19.35-1.1.0, and currently support ARMv7 and tested on imx6ulevk/imx6ull14x14evk/imx6qpsabresd/imx6dlsabresd/imx6sxsabresdimx6slevk boards. I also did stress test by tool stress-ng on some boards.      You need to git clone https://gitee.com/zxd2021-imx/xenomai-arm.git, and git checkout Linux-4.19.35-1.1.0. (which inlcudes all patches and bb file) and add the following variable in conf/local.conf before build xenomai by command bitake xenomai.  XENOMAI_KERNEL_MODE = "cobalt"  PREFERRED_VERSION_linux-imx = "4.19-${XENOMAI_KERNEL_MODE}" IMAGE_INSTALL_append += " xenomai" DISTRO_FEATURES_remove = "optee" or XENOMAI_KERNEL_MODE = "mercury" PREFERRED_VERSION_linux-imx = "4.19-${XENOMAI_KERNEL_MODE}" IMAGE_INSTALL_append += " xenomai" DISTRO_FEATURES_remove = "optee" If XENOMAI_KERNEL_MODE = "cobalt", you can build dual kernel version. And If  XENOMAI_KERNEL_MODE = "mercury", it is single kernel with PREEMPT-RT patch. The following is test result by the command ( /usr/xenomai/demo/cyclictest -p 50 -t 5 -m -n -i 1000 😞 //Mecury on 6ULL with stress-ng --cpu 4 --io 2 --vm 1 --vm-bytes 128M --metrics-brief policy: fifo: loadavg: 6.08 2.17 0.81 8/101 534 T: 0 (  530) P:99 I:1000 C:  74474 Min:     23 Act:  235 Avg:   77 Max:    8278 T: 1 (  531) P:99 I:1500 C:  49482 Min:     24 Act:   32 Avg:   56 Max:    8277 T: 2 (  532) P:99 I:2000 C:  36805 Min:     24 Act:   38 Avg:   79 Max:    8170 T: 3 (  533) P:99 I:2500 C:  29333 Min:     25 Act:   41 Avg:   54 Max:    7069 T: 4 (  534) P:99 I:3000 C:  24344 Min:     24 Act:   51 Avg:   60 Max:    7193   //Cobalt on 6ULL with stress-ng --cpu 4 --io 2 --vm 1 --vm-bytes 128M --metrics-brief policy: fifo: loadavg: 7.02 6.50 4.01 8/100 660 T: 0 (  652) P:50 I:1000 C: 560348 Min:      1 Act:   10 Avg:   15 Max:      71 T: 1 (  653) P:50 I:1500 C: 373556 Min:      1 Act:    9 Avg:   17 Max:      78 T: 2 (  654) P:50 I:2000 C: 280157 Min:      2 Act:   14 Avg:   20 Max:      64 T: 3 (  655) P:50 I:2500 C: 224120 Min:      1 Act:   12 Avg:   15 Max:      57 T: 4 (  656) P:50 I:3000 C: 186765 Min:      1 Act:   31 Avg:   19 Max:      53   //Cobalt on 6qp with stress-ng --cpu 4 --io 2 --vm 1 --vm-bytes 512M --metrics-brief policy: fifo: loadavg: 8.11 7.44 4.45 8/156 1057 T: 0 (  917) P:50 I:1000 C: 686106 Min:      0 Act:    3 Avg:    5 Max:      53 T: 1 (  918) P:50 I:1500 C: 457395 Min:      0 Act:    3 Avg:    5 Max:      49 T: 2 (  919) P:50 I:2000 C: 342866 Min:      0 Act:    2 Avg:    4 Max:      43 T: 3 (  920) P:50 I:2500 C: 274425 Min:      0 Act:    3 Avg:    5 Max:      58 T: 4 (  921) P:50 I:3000 C: 228682 Min:      0 Act:    2 Avg:    6 Max:      46   //Cobalt on 6dl with stress-ng --cpu 2 --io 2 --vm 1 --vm-bytes 256M --metrics-brief policy: fifo: loadavg: 3.35 4.15 2.47 1/122 850 T: 0 (  729) P:50 I:1000 C: 608088 Min:      0 Act:    1 Avg:    3 Max:      34 T: 1 (  730) P:50 I:1500 C: 405389 Min:      0 Act:    0 Avg:    4 Max:      38 T: 2 (  731) P:50 I:2000 C: 304039 Min:      0 Act:    1 Avg:    4 Max:      45 T: 3 (  732) P:50 I:2500 C: 243225 Min:      0 Act:    0 Avg:    4 Max:      49 T: 4 (  733) P:50 I:3000 C: 202683 Min:      0 Act:    0 Avg:    5 Max:      38   //Cobalt on 6SX stress-ng --cpu 4 --io 2 --vm 1 --vm-bytes 512M  --metrics-brief policy: fifo: loadavg: 7.51 7.19 6.66 8/123 670 T: 0 (  598) P:50 I:1000 C:2314339 Min:      0 Act:    3 Avg:    8 Max:      60 T: 1 (  599) P:50 I:1500 C:1542873 Min:      0 Act:   15 Avg:    8 Max:      72 T: 2 (  600) P:50 I:2000 C:1157152 Min:      0 Act:    4 Avg:    9 Max:      55 T: 3 (  601) P:50 I:2500 C: 925721 Min:      0 Act:    5 Avg:    9 Max:      57 T: 4 (  602) P:50 I:3000 C: 771434 Min:      0 Act:    6 Avg:    6 Max:      41   //Cobalt on 6Solo lite stress-ng --cpu 4 --io 2 --vm 1 --vm-bytes 512M  --metrics-brief policy: fifo: loadavg: 7.01 7.04 6.93 8/104 598 T: 0 (  571) P:50 I:1000 C:3639967 Min:      0 Act:    9 Avg:    7 Max:      60 T: 1 (  572) P:50 I:1500 C:2426642 Min:      0 Act:    9 Avg:   11 Max:      66 T: 2 (  573) P:50 I:2000 C:1819980 Min:      0 Act:   11 Avg:   10 Max:      57 T: 3 (  574) P:50 I:2500 C:1455983 Min:      0 Act:   12 Avg:   10 Max:      56 T: 4 (  575) P:50 I:3000 C:1213316 Min:      0 Act:    7 Avg:    9 Max:      43   //Cobalt on 7d with stress-ng --cpu 2 --io 2 --vm 1 --vm-bytes 256M --metrics-brief policy: fifo: loadavg: 5.03 5.11 5.15 6/107 683 T: 0 (  626) P:50 I:1000 C:6842938 Min:      0 Act:    1 Avg:    2 Max:      63 T: 1 (  627) P:50 I:1500 C:4561953 Min:      0 Act:    4 Avg:    2 Max:      66 T: 2 (  628) P:50 I:2000 C:3421461 Min:      0 Act:    0 Avg:    2 Max:      69 T: 3 (  629) P:50 I:2500 C:2737166 Min:      0 Act:    3 Avg:    2 Max:      71 T: 4 (  630) P:50 I:3000 C:2280969 Min:      0 Act:    2 Avg:    1 Max:      33   //////////////////////////////////////// Update for Yocto L5.10.52 2.1.0  /////////////////////////////////////////////////////////// New release for Yocto release L10.52 2.1.0. You need to git clone https://gitee.com/zxd2021-imx/xenomai-arm and git checkout xenomai-5.10.52-2.1.0. Updating: 1, Upgrade Xenomai to v3.2 2, Enable Dovetail instead of ipipe. Copy xenomai-arm to <Yocto folder>/sources/meta-imx/meta-bsp/recipes-kernel, and add the following variable in conf/local.conf before build Image with xenomai enable by command bitake imx-image-multimedia . XENOMAI_KERNEL_MODE = "cobalt" IMAGE_INSTALL_append += " xenomai" or XENOMAI_KERNEL_MODE = "mercury" IMAGE_INSTALL_append += " xenomai" Notice: If XENOMAI_KERNEL_MODE = "cobalt", you can build dual kernel version. And If XENOMAI_KERNEL_MODE = "mercury", it is single kernel with PREEMPT-RT patch.    
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Materials: i.MX8M Plus EVK Rev. A USB cable type-C USB cable type-B AC Adapter EA1045CR Micro SD (Optional) 88W8997-based wireless modules Software: Yocto Project Mobaxterm Personal Edition v20.2 Build 4296 This test was done on an i.MX8M Plus EVK with Linux 5.10. Hardknott.   To achieve this, you need to identify your WI-FI module and look for the necessary drivers for that module, in my case I am using the 88W8997 module that comes with the i.MX8M Plus, but you can select any other WI-FI module you want.   In my case I build a basic image on Yocto, following the Yocto users guide, I bitbake just the core boot image that allows me to boot the i.MX8M plus. Deploy your image on an SD or eMMC. These instructions apply to SD and MMC cards although for brevity, and usually, only the SD card is listed. For a Linux image to be able to run, four separate pieces are needed: Linux OS kernel image (zImage/Image) Device tree file (*.dtb) Bootloader image Root file system (i.e., EXT4)   The Yocto Project build creates an SD card image that can be flashed directly. This is the simplest way to load everything needed onto the card with one command. A .wic image contains all four images properly configured for an SD card. The release contains a pre-built .wic image that is built specifically for the one board configuration. It runs the Wayland graphical backend. It does not run on other boards unless U-Boot, the device tree, and rootfs are changed. When more flexibility is desired, the individual components can be loaded separately, and those instructions are included here as well. An SD card can be loaded with the individual components one-by-one or the .wic image can be loaded and the individual parts can be overwritten with specific components. The rootfs on the default .wic image is limited to a bit less than 4 GB, but re-partitioning and re-loading the rootfs can increase that to the size of the card. The rootfs can also be changed to specify the graphical backend that is used. Carry out the following command to copy the SD card image to the SD/MMC card. Change sdx below to match the one used by the SD card. $ sudo dd if=<image name>.wic of=/dev/sdx bs=1M && sync The entire contents of the SD card are replaced. If the SD card is larger than 4 GB, the additional space is not accessible. As this build does not contain the driver integrated we need to add it manually on Linux user space. Follow these instructions to load the driver modules and bring up the 88W8987-based wireless module, more info can be found on the next link: https://www.nxp.com/products/wireless/wi-fi-plus-bluetooth/2-4-5-ghz-dual-band-2x2-wi-fi-5-802-11ac-plus-bluetooth-5-3-solution:88W8997?tab=Documentation_Tab   Use the nano editor included in the pre-built image to edit and verify the module parameters in the wifi_mod_para.conf configuration file.   Add the following lines to the configuration file: PCIE8997 = { cfg80211_wext=0xf wfd_name=p2p max_vir_bss=1 cal_data_cfg=none drv_mode=7 ps_mode=2 auto_ds=2 fw_name=nxp/pcieuart8997_combo_v4.bin } Load the modules in the kernel:   Verify the kernel debug messages in the command output   Verify that the module is now visible to the system:     Now that the module is ready to work, we need to enable it, in my case the Wi-Fi is named mlan0, it could vary on other Linux systems.   In the case you need to see which networks are available you can scan it and select the one you need.   Identify your network and add it to the  WPA supplicant file:     Associate the Wi-Fi with config:   Check if you have right SSID associated:   Use DHPC to get the IP   Ping any public site you know to check the network.   In the case you have a Temporary failure in name resolution you will need to change the default DNS that was assigned by DHCP:     Modify /etc/resolv.conf file and add the DNS of your preference, for my case I add the one that uses Google, as they have access to the most common web pages.   And with that should work.    
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This is a quick article focused on how to add the support of the ssh on the i.MX devices using Yocto to add that packages.   Refer to the pdf attached.
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This document describes the steps to create your own out-of-tree kernel module recipe for Yocto.
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The i.MX 8QuadXPlus Multisensory Enablement Kit (MEK) is a NXP development platform based on Cortex A-35 + Cortex-M4 cores. Built with high-level integration to support graphics, video, image processing, audio, and voice functions, the i.MX 8X processor family is ideal for safety-certifiable and efficient performance requirements. This tutorial shows how to enable the Cortex-M4 using the MCUXpresso SDK package and loading the binary from the network. NOTE: It is also possible to load the Cortex-M4 image from the SCFW using the imx-mkimage utility. But now we are going to focus on MCUXpresso. Setting up the machine   Install cmake on the host machine: $ sudo apt-get install cmake Download the armgcc toolchain and export the location as ARMGCC_DIR: $ export ARMGCC_DIR=<your_path_to_arm_gcc>/gcc-arm-none-eabi-9-2020q2/ NOTE: The ARMGCC_DIR variable needs to be exported on the terminal used for compilation. To setup the TFTP server on the host machine: Configuring your Host PC for TFTP Permalink   The first step is to install all the prerequisite packages for TFTP: $ sudo apt-get install xinetd tftpd tftp Create a TFTP folder in your desired location with root owner and the “rwx” permission for all users: $ sudo mkdir /tftpboot $ sudo chmod –R 777 /tftpboot $ sudo chown –R root /tftpboot Create a configuration file for the TFTP with the following content. (The server_args parameter must match with the folder created above) $ cat /etc/xinetd.d/tftp service tftp { protocol = udp port = 69 socket_type = dgram wait = yes user = root server = /usr/sbin/in.tftpd server_args = -s /tftpboot disable = no } Restart the xinetd service: $ sudo /etc/init.d/xinetd restart You can place any file at the TFTP folder and load it through U-Boot, you can also create symbolic links from your building directory avoiding to copy and paste your zImage and dtb files every time. Configuring your Host PC for NFS Permalink   Install all the needed packages for NFS: $ sudo apt-get install nfs-kernel-server Create a folder for placing your rootfs: $ mkdir /tftpboot/rfs Add the following line in the end of your /etc/exports file: /tftpboot/rfs *(rw,no_root_squash,no_subtree_check) Restart the NFS service: $ sudo service nfs-kernel-server restart Place your rootfs or create a symbolic link for the NFS folder.    Downloading the SDK Download the MCUXpresso following these steps: Click on “Select Development Board”; Select MEK-MIMX8QX under “Select a Device, Board, or Kit” and click on “Build MCUXpresso SDK” on the right; Select “Host OS” as Linux and “Toolchain/IDE” as GCC ARM Embedded; Add “FreeRTOS” and all the wanted Middleware and hit “Request Build”; Wait for the SDK to build and download the package. Building the image All demos and code examples available on the SDK package are located in the directory <<SDK_dir>>/boards/mekmimx8qx/. This tutorial shows how to build and flash the hello_world demo but similar procedures can be applied for any example (demo, driver, multicore, etc) on the SDK. To build the demo, enter the armgcc folder under the demo directory and make sure that the ARMGCC_DIR variable is set correctly. $ cd ~/SDK_2.3.0_MEK-MIMX8QX/boards/mekmimx8qx/demo_apps/hello_world/armgcc $ export ARMGCC_DIR=<your_path_to_arm_gcc>/gcc-arm-none-eabi-9-2020q2/ Run the build_release.sh script to build the code. $ ./build_release.sh NOTE: If needed, give the script execution permission by running chmod +x build_release.sh. This generates the M4 binary (hello_world.bin) under the release folder. Copy this image to the /tftpboot/ directory on the host PC. NOTE: This procedure shows how to build the M4 image that runs on TCM. To run the image from DDR, use the build_ddr_release.sh script to build the binary under the ddr_release folder. Flashing the image Open two serial consoles, one for /dev/ttyUSB0 for Cortex-A35 to boot Linux, and one for /dev/ttyUSB1 for Cortex-M4 to boot the SDK image. On the A35 console, with a SD Card with U-Boot, stop the booting process and enter the following commands to load the M4 binary to TCM: => dhcp => setenv serverip <ip_from_host_pc> => tftp 0x88000000 hello_world.bin => dcache flush => bootaux 0x88000000 Then the M4 core will load the image to the /dev/ttyUSB1 console.    
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This note show how to use the open source gstreamer1.0-rtsp-server package on i.MX6QDS and i.MX8x to stream video files and camera using RTP protocol.  The i.MX 6ULL and i.MX 7 doesn't have Video Processing Unit (VPU). Real Time protocol is a very common network protocol for delivering media over IP networks. On the board, you will need a GStreamer pipeline that encodes the raw video, adds the RTP payload, and sends over a network sink. A generic pipeline would look as follows: video source ! video encoder ! RTP payload ! network sink Video source: often it is a camera, but it can be a video from a file or a test pattern, for example. Video encoder: a video encoder as H.264, H.265, VP8, JPEG and others. RTP payload: an RTP payload that matches the video encoder. Network sink: a video sync that streams over the network, often via UDP.   Prerequisites: MX6x o MX8x board with the L5.10.35 BSP installed. A host PC with either Gstreamer or VLC player installed. Receiving h.264/h.265 Encoded RTP Video Stream on a Host Machine Using GStreamer GStreamer is a low-latency method for receiving RTP video. On your host machine, install Gstreamer and send the following command: $ gst-launch-1.0 -v udpsrc port=5000 caps = "application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)H264, payload=(int)96" ! rtph264depay ! decodebin ! videoconvert ! autovideosink sync=false   Using Host PC: VLC Player Optionally, you can use VLC player to receive RTP video on a PC. First, in your PC, create a sdp file with the following content:  stream.sdpv=0m=video 5000 RTP/AVP 96c=IN IP4 127.0.0.1a=rtpmap:96 H264/90000 After this, with the GStreamer pipepline on the device running, open this .sdp file with VLC Player on the host PC. Sending h.264 and h.265 Encoded RTP Video Stream GStreamer provides an h.264 encoding element by software named x264enc. Use this plugin if your board does not support h.264 encoding by hardware or if you want to use the same pipeline on different modules. Note that the video performance will be lower compared with the plugins with encoding accelerated by hardware. # gst-launch-1.0 videotestsrc ! videoconvert ! x264enc ! rtph264pay config-interval=1 pt=96 ! udpsink host=<host-machine-ip> port=5000 Note: Replace <host-machine-ip> by the IP of the host machine. In all examples you can replace videotestsrc by v4l2src element to collect a stream from a camera   i.MX8X # gst-launch-1.0 videotestsrc ! videoconvert ! v4l2h264enc ! rtph264pay config-interval=1 pt=96 ! udpsink host=<host-machine-ip> port=5000   i.MX 8M Mini Quad/ 8M Plus # gst-launch-1.0 videotestsrc ! videoconvert ! vpuenc_h264 ! rtph264pay config-interval=1 pt=96 ! udpsink host=<host-machine-ip> port=5000 i.MX6X The i.MX6QDS does not support h.265 so the h.264 can work: # gst-launch-1.0 videotestsrc ! videoconvert ! vpuenc_h264 ! rtph264pay config-interval=1 pt=96 ! udpsink host=<host-machine-ip> port=5000   Using Other Video Encoders While examples of streaming video with other encoders are not provided, you may try it yourself. Use the gst-inspect tool to find available encoders and RTP payloaders on the board: # gst-inspect-1.0 | grep -e "encoder"# gst-inspect-1.0 | grep -e "rtp" -e " payloader" Then browse the results and replace the elements in the original pipelines. On the receiving end, you will have to use a corresponding payload. Inspect the payloader element to find the corresponding values. For example: # gst-inspect-1.0 rtph264pay   Install rtp in your yocto different form L5.10.35 BSP, to install gstreamer1.0-rtsp-server in any Yocto Project image, please follow the steps below: Enable meta-multimedia layer: Add the following on your build/conf/bblayers.conf: BBLAYERS += "$"${BSPDIR}/sources/meta-openembedded/meta-multimedia" Include gstreamer1.0-rtsp-server into the image: Add the following on your build/conf/local.conf: IMAGE_INSTALL_append += "gstreamer1.0-rtsp-server" Run bitbake and mount your sdcard. Copy the binaries: Access the gstreamer1.0-rtsp-server examples folder: $ cd /build/tmp/work/cortexa9hf-vfp-neon-poky-linux-gnueabi/gstreamer1.0-rtsp-server/$version/build/examples/.libs Copy the test-uri and test-launch to the rootfs /usr/bin folder. $ sudo cp test-uri test-launch /media/USER/ROOTFS_PATH/usr/bin Be sure that the IPs are correctly set: SERVER: => ifconfig eth0 $SERVERIP CLIENT: => ifconfig eth0 $CLIENTIP Video file example SERVER: => test-uri file:///home/root/video_file.mp4 CLIENT: => gst-launch-1.0 playbin uri=rtsp://$SERVERIP:8554/test You can try to improve the framerate performance using manual pipelines in the CLIENT with the rtspsrc plugin instead of playbin. Follow an example: => gst-launch-1.0 rtspsrc location=rtsp://$SERVERIP:8554/test caps = 'application/x-rtp'  ! queue max-size-buffers=0 ! rtpjitterbuffer latency=100 ! queue max-size-buffers=0 ! rtph264depay ! queue max-size-buffers=0 ! decodebin ! queue max-size-buffers=0 ! imxv4l2sink sync=false   Camera example SERVER: => test-launch "( imxv4l2src device=/dev/video0 ! capsfilter caps='video/x-raw, width=1280, height=720, framerate=30/1, mapping=/test' ! vpuenc_h264 ! rtph264pay name=pay0 pt=96 )" CLIENT: => gst-launch-1.0 rtspsrc location=rtsp://$SERVERIP:8554/test ! decodebin ! autovideosink sync=false The rtspsrc has two properties very useful for RTSP streaming: Latency: Useful for low-latency RTSP stream playback (default 200 ms); Buffer-mode: Used to control buffer mode. The slave mode is recommended for low-latency communications. Using these properties, the example below gets 29 FPS without a sync=false property in the sink plugin. The key achievement here is the fact that there is no dropped frame: => gst-launch-1.0 rtspsrc location=rtsp://$SERVERIP:8554/test latency=100 buffer-mode=slave ! queue max-size-buffers=0 ! rtph264depay ! vpudec ! imxv4l2sink      
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Software environment: L5.4.47_2.2.0 Hardware i.MX8QXPC0 EVK board In the uuu script we can see the bootloader imx-boot-imx8qxpc0mek-sd.bin-flash is necessary. The default BSP build generate in the yocto project is with the spl, some customers are confused about the how to build the imx-boot-imx8qxpc0mek-sd.bin-flash. Here I give the manually compile way and generate it in yocto. In the yocto generate it is more convenient than the manually compile way. Hope this can do help for you.
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platform: imx8qxp c0 mek OS: yocto 4.19.35_1.1.0 hardware connection: imx8qxp lvds0 => dummy panel ,  lvds1 => it6263 => display   On imx8qxp there are one DPU(display process unit) and one ISI(image subsystem interface), ISI supports input from dpu.   dpu block diagram: note that only dsi0 and lvds0 can be used for loopback. and this patch only test the lvds0, since lvds support dummy panel.   Please see the readme in the attchment for how to enale this feature.   Note: for ISI loopback,  it needs output of 2x GPIO (4x for HDMI-TX or combo PHY) to pixel_link_receiver_address: For iMX8QM: o LVDS: pixel_link_receiver_address[1:0] = do_gpio_dr[7:6]  o MIPI-DSI: pixel_link_receiver_address[1:0] = do_gpio_dr[7:6] o HDMI-TX: odd_pixel_link_receiver_address[1:0] = do_gpio_dr[7:6],even_pixel_link_receiver_address[1:0] = do_gpio_dr[5:4]   For iMX8QXP: o Combo MIPI-DSI / LVDS: pixel_link0_receiver_address[1:0] = do_gpio_dr[7:6], pixel_link1_receiver_address[1:0] = do_gpio_dr[5:4]   
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Yoctoproject Framework Installing any Needed Package Using Yocto and i.MX Boards Testing Yocto for i.MX6 i.MX53 QSB - Quick Start Board i.MX6 Sabre Lite Board Build the image SDCard Image Yoctoproject Framework Yoctoproject is a framework for creating Linux distributions for embedded devices. Its layering mechanism makes it easy to add Linux to new target devices highly customized for a particular platform; it can include custom start-up scripts, software packages built with a high degree of optimization for a particular architecture, and different user interfaces from full Gnome desktop to a simple a serial console. Yocto has 2 basic layers: board support packages layer and core layer. In the BSP layer is where all the custom software and configuration tweaks for a particular platform are included, while the core layer provides the common software stack to provide from a simple command line interface to Sato desktop interface (Matchbox based and Gnome mobile software stack). A third layer could be added to provide additional user interfaces LXDE, XFCE, and more; YP is quite flexible&emdash;one of it major strengths. Installing any Needed Package Go to Yocto Project Quick Start and double check that you have all the necessary packages installed for your machine. For example, if building machine was an Ubuntu machine: $ sudo apt-get install gawk wget git-core diffstat unzip texinfo  build-essential chrpath libsdl1.2-dev xterm curl Using Yocto and i.MX Boards Please, go to project's README file in order to see the recommended instructions to download the source code. Testing Yocto for i.MX6 How to test Yocto for i.MX 6 i.MX53 QSB - Quick Start Board Edit conf/local.conf user config file and set imx53 Quick start board machine and enable parallel build features. MACHINE ?= "imx53qsb" BB_NUMBER_THREADS = "4" PARALLEL_MAKE = "-j 4" i.MX6 Sabre Lite Board Edit conf/local.conf user config file and set i.MX6 Sabrelite board machine and enable parallel build features MACHINE ?= "imx6qsabrelite" BB_NUMBER_THREADS = "4" PARALLEL_MAKE = "-j 4" if you've been facing problems to get yocto's images working on your i.MX Sabre Lite board, please take a look on this comment Re: The kernel sometins hang  in L3.0.35_4.0.0_130424 release Build the image some example of available image: image name description core-image-minimal A small image just capable of allowing a device to boot. core-image-base A console-only image that fully supports the target device hardware. core-image-sato Image with sato, a mobile environment and visual style for mobile devices.  The image supports X11 with a Sato theme, Pimlico applications and contains terminal, editor and file manager. fsl-image-test Builds contents core-image-base plus Freescale test applications and multimedia components. fsl-image-gui Builds contents of core-image-sato with Freescale test applications and multimedia with hardware accelerated X11 To build the image: $ bitbake <image_name> Build using Dash instead can bring some problems. You can check what your system uses typing: "ls -l /bin/sh". On Ubuntu you can change it using "dpkg-reconfigure bash". Some Ubuntu releases you must use "dpkg-reconfigure dash" and choose Bash Built images are located in cd tmp/deploy/images SDCard Image sudo dd if=core-image-minimal-imx6qsabrelite.sdcard of=/dev/sdb i.MX Yocto Project: Frequently Asked Questions
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Yocto Project versions and names Preparing host environment For virtual machine (VirtualBox): Download the source code from NXP Code Aurora Yocto Project versions and names See here the list of all yocto version names: Releases - Yocto Project  The current stable release is Zeus Preparing host environment For virtual machine (VirtualBox): Please set memory size minimal to 1GB and disk size to 32GB. (24Feb2014 Ubuntu 12.04LTS)   First, make sure your host PC has the required packages to run Yocto The essential packages you need for a supported Ubuntu distribution are shown in the following command: $ sudo apt-get build-dep qemu $ sudo apt-get remove oss4-dev $ sudo apt-get install gawk wget git-core diffstat unzip texinfo gcc-multilib \   build-essential chrpath socat cpio python python3 python3-pip python3-pexpect \   xz-utils debianutils iputils-ping python3-git python3-jinja2 libegl1-mesa libsdl1.2-dev \   xterm‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ ‍ ‍ ‍ ‍ ‍ ‍ For other Linux distribution or newer Yocto Project release see here the updated list. Download the source code from community Install the repo $ sudo apt-get install repo‍‍‍ ‍ Download the BSP source: $ mkdir fsl-community-bsp $ cd fsl-community-bsp $ repo init -u https://github.com/Freescale/fsl-community-bsp-platform -b zeus $ repo sync‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ ‍ ‍ ‍ ‍ Download the source code from NXP Code Aurora See here the list of all BSP releases from NXP: imx-manifest - i.MX Release Manifest  Currently, the latest NXP release how to is here: README - imx-manifest - i.MX Release Manifest  To understand the difference between the 2 source code (community X NXP BSP) see here Go to https://community.nxp.com/docs/DOC-94849  Go to Task #2
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This document explains how to bring-up u-boot & Linux via JTAG This procedure has been tested on: i.MX6 Solo X Sabre SD i.MX6UL EVK Prerequistes: Get the latest BSP for your board. This procedure was tested with L4.1.15. Build the 'core-image-minimal' image to bring-up your board (Detailed steps here) Optional- Build a meta-toolchain for your device 1.- Set board to boot from Serial dowloader mode or set it to boot from the SD card and remove the sd card We basically want the board to stall in boot ROM to attach to the target. 2.- Connect JTAG probe and turn on the board The device should stall trying to establish a connection to download an image, this will allow us to attach to the target. 3.- Load Device Configuration Data In 'normal' boot sequence the boot ROM takes care of reading the DCD and configuring the device accordingly, but in this case we are skipping this sequence and we need to configure the device manually. The script used by Lauterbach to parse and configure the device is called dcd_interpreter.cmm and can be found here. Search for the package for your specific device. The DCD configuration for your board should be on your u-boot directory: yocto_build_dir/tmp/work/<your board>imx6ulevk/u-boot-imx/<u-boot_version>2016.03-r0/git under board/freescale/<name of your board>mx6ul_14x14_evk/imximage.cfg This file (imximage.cfg) contains all the data to bring up DRAM among other early configuration options. 4.- Load U-boot If an SREC file of U-boot is not present build it (meta-toolchain installed required) the SREC file contains all the information required by the probe to load it and makes this process easier. To build the SREC simply type: make <your board defconfig>mx6ul_14x14_evk_defconfig  (all supported boards are found under u-boot_dir/configs) make If you cannot build an SREC or do not want to, you can use the u-boot.imx (located under yocto_build_dir/tmp/deploy/images/<your board name>/) or u-boot.bin files but you will need to figure out the start address and load address for these files, this can be done by examining the IVT on u-boot.imx (here is a useful document explaining the structure of the IVT). Let U-boot run and you should see its output on the console I will try to boot from several sources but it will fail and show you the prompt. 5.- Create RAMDisk After building the core-image-minimal you will have all the required files under yocto_build_dir/tmp/deploy/images/<your board name>/ You will need: zImage.bin - zImage--<Linux Version>--<your board>.bin Device tree blob - zImage--<Linux Version>--<your board>.dtb Root file system - core-image-minimal-<your board>.rootfs.ext4 We need to create a RAMDisk out of the root file system we now have, these are the steps to do so: Compress current Root file system using gzip: gzip core-image-minimal-<your board>.rootfs.ext4 If you want to keep the original file use: gzip -c core-image-minimal-<your board>.rootfs.ext4 > core-image-minimal-<your board>.rootfs.ext4.gz Create RAMDisk using mkimage: mkimage -A arm -O linux -T ramdisk -C gzip -n core-image-minimal -d core-image-minimal-<your board>.rootfs.ext4.gz core-image-minimal-RAMDISK.rootfs.ext4.gz.u-boot Output: Image Name: core-image-minimal Created: Tue May 23 11:28:55 2017 Image Type: ARM Linux RAMDisk Image (gzip compressed) Data Size: 3017939 Bytes = 2947.21 kB = 2.88 MB Load Address: 00000000 Entry Point: 00000000 Here are some details on mkimage usage Usage: mkimage -l image -l ==> list image header information mkimage [-x] -A arch -O os -T type -C comp -a addr -e ep -n name -d data_file[:data_file...] image -A ==> set architecture to 'arch' -O ==> set operating system to 'os' -T ==> set image type to 'type' -C ==> set compression type 'comp' -a ==> set load address to 'addr' (hex) -e ==> set entry point to 'ep' (hex) -n ==> set image name to 'name' -d ==> use image data from 'datafile' -x ==> set XIP (execute in place) mkimage [-D dtc_options] [-f fit-image.its|-F] fit-image -D => set options for device tree compiler -f => input filename for FIT source Signing / verified boot not supported (CONFIG_FIT_SIGNATURE undefined) mkimage -V ==> print version information and exit 6.- Modify U-boot's environment variables Now we need to modify U-boot's bootargs as follows: setenv bootargs console=${console},${baudrate} root=/dev/ram rw We need to find out the addresses where u-boot will expect the zImage, the device tree and the initial RAMDisk, we can do it as follows: => printenv fdt_addr fdt_addr=0x83000000 => printenv initrd_addr initrd_addr=0x83800000 => printenv loadaddr loadaddr=0x80800000 Where: fdt_addr -> Device tree blob load address initrd_addr -> RAMDisk load address loadaddr -> zImage load address 7.- Load zImage, DTB and RAMDisk Now we know where to load our zImage, device tree blob and RAMDisk, on Lauterbach this can be achieved by running the following commands: Stop the target and execute: data.load.binary zImage.bin 0x80800000 data.load.binary Your_device.dtb 0x83000000 data.load.binary  core-image-minimal-RAMDISK.rootfs.ext4.gz.u-boot 0x83800000 Let the device run again and deattach from the device in lauterbach this is achieved by: go SYStem.mode.NoDebug start the boot process on u-boot as follows: bootz ${loadaddr} ${initrd_addr} ${fdt_addr} You should now see the Linux kernel boot process on your terminal: After the kernel boots you should see its prompt on your terminal: Since we are running out of RAM there is no way for us to save u-boot's environment variables, but you can modify the source and compile u-boot with the new bootargs, by doing so you can create a Load script that loads all the binaries hits go and the boot process will continue automatically. One way to achieve this is to modify the configuration file under U-boot_dir/include/configs/<your board>.h find the mfgtool_args and modify accordingly. The images attached to this thread have been modified as mentioned.
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