i.MXプロセッサナレッジベース

ディスカッション

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

Some customer need to know how to add support RS485 mode half duplex? Here give some recommends. About i.MX6 UART to RS485 applications 1. Using RS485 mode of UART directly. On hardware, you should use UART_CTS_B to control RX & TX. On software, The link for you reference: Does UART in RS485 mode support only 9 Bit mode for i.MX6 ? 2. Sensing IO direction Automatically via hardware, don't need to tune software. For i.MX8QXP As the linux BSP for i.MX8QXP do not support RS 485 mode, so for the RS 485 using you can use the Sensing IO direction Automatically via hardware, don't need to tune software. As the above i.MX6 design.

Some of Chinese customer couldn’t normally download android source code from google site, here give a way to download android source from Mirror site of Tsinghua University. Customers in other areas can refer to the configurations of ubuntu 18.04 in the document. Updating software packages for ubuntu18.04 LTS 1、Using software updater to update software packages Press Install Now button to update software. Restart ubuntu18.04 2、Installing necessary software packages #sudo apt-get install flex # sudo apt-get install bison # sudo apt-get install gperf # sudo apt-get install build-essential # sudo apt-get install zlib1g-dev # sudo apt-get install lib32ncurses5-dev # sudo apt-get install x11proto-core-dev # sudo apt-get install libx11-dev # sudo apt-get install lib32z1-dev # sudo apt-get install libgl1-mesa-dev # sudo apt-get install tofrodos # sudo apt-get install python-markdown # sudo apt-get install libxml2-utils # sudo apt-get install xsltproc # sudo apt-get install uuid-dev:i386 liblzo2-dev:i386 # sudo apt-get install gcc-multilib g++-multilib # sudo apt-get install subversion # sudo apt-get install openssh-server openssh-client # sudo apt-get install uuid uuid-dev # sudo apt-get install zlib1g-dev liblz-dev # sudo apt-get install liblzo2-2 liblzo2-dev # sudo apt-get install lzop # sudo apt-get install git-core curl # sudo apt-get install u-boot-tools # sudo apt-get install mtd-utils # sudo apt-get install android-tools-fsutils # sudo apt-get install openjdk-8-jdk # sudo apt-get install device-tree-compiler # sudo apt-get install aptitude # sudo aptitude install libcurl4-openssl-dev nss-updatedb 3、Downloading and unpacking Android release package https://www.nxp.com/products/processors-and-microcontrollers/applications-processors/i.mx-applications-processors/android-os-for-i.mx-applications-processors:IMXANDROID?tab=Design_Tools_Tab --O8.1.0_1.3.0_ANDROID_SOURCE_8MQ_GA File name is imx-o8.1.0_1.3.0_8m.tar.gz # cd ~ # tar xzvf imx-o8.1.0_1.3.0_8m.tar.gz Downloading android8.1.0-1.3.0 source code Getting repo # cd ~ # mkdir bin # cd bin # curl https://storage.googleapis.com/git-repo-downloads/repo > ~/bin/repo # chmod a+x ~/bin/repo # export PATH=${PATH}:~/bin Modifying repo File Open ~/bin/repo file with 'gedit' and Change google address From REPO_URL = 'https://gerrit.googlesource.com/git-repo' To REPO_URL = 'https://mirrors.tuna.tsinghua.edu.cn/git/git-repo/' 3、Setting email address # git config --global user.email "[email protected]" # git config --global user.name "xxxx" [ Email & Name should be yours] 4、Modifying android setup script and Running it Open ~/ imx-o8.1.0_1.3.0_8m /imx_android_setup.sh and add a line like below: ... if [ "$rc" != 0 ]; then echo "---------------------------------------------------" echo "-----Repo Init failure" echo "---------------------------------------------------" return 1 fi find -name 'aosp-O8.1.0-1.3.0.xml'| xargs perl -pi -e 's|https://android.googlesource.com/|https://aosp.tuna.tsinghua.edu.cn/|g' fi # Don't Delete .repo directory and hidden files #rm -rf $android_builddir/.??* ... Then save it and exit. # cd ~/ # source ~/ imx-o8.1.0_1.3.0_8m/imx_android_setup.sh Then android_build directory is created at ~/ # export MY_ANDROID=~/android_build 48 hours later: Compiling android8.1.0-1.3.0 BSP # cd ~/android_build # gedit ./prebuilts/sdk/tools/jack-admin And find “JACK_SERVER_COMMAND” ,change it to be: JACK_SERVER_COMMAND="java -XX:MaxJavaStackTraceDepth=-1 -Djava.io.tmpdir=$TMPDIR $JACK_SERVER_VM_ARGUMENTS -Xmx4096m -cp $LAUNCHER_JAR $LAUNCHER_NAME" Save and exit. And run: # ./prebuilts/sdk/tools/jack-admin stop-server # ./prebuilts/sdk/tools/jack-admin start-server # export ARCH=arm64 # export CROSS_COMPILE=~/android_build/prebuilts/gcc/linux-x86/aarch64/aarch64-linuxandroid-4.9/bin/aarch64-linux-android- # export LC_ALL=C # source build/envsetup.sh # lunch evk_8mq-userdebug Begin to build android BSP for i.MX8MQ # make –j4 NXP TIC weidong sun 2018-08-15

ccache is a C compiler cache. ccache can save a large amount of compilation time on recurring builds and builds restarted from a clean repository after make clean or git clean. It is well suited for e.g. u-boot and Linux compilation. Caching the host compiler Caching "native" builds is easily done by adding in the beginning of your $PATH a special directory, which contains links to ccache to override the usual compiler. On e.g. Debian this directory is readily available as /usr/lib/ccache, So you can do: $ export PATH="/usr/lib/ccache:$PATH" Typical links found in this folder are: c++ -> ../../bin/ccache cc -> ../../bin/ccache g++ -> ../../bin/ccache gcc -> ../../bin/ccache etc... Caching the cross compiler Caching cross-compiled builds can be done in the same way as native builds, provided you create links of the form e.g. arm-linux-gnueabihf-gcc pointing to ccache. But there is an even more convenient way for those projects, which rely on a $CROSS_COMPILE environment variable (as is the case for e.g. u-boot and Linux). You can prefix the cross compiler with ccache there in e.g. the following way: $ export CROSS_COMPILE="ccache arm-linux-gnueabihf-" Monitoring efficiency Now that your builds are cached, you might want to see how much is "spared" with this technique. ccache -s will tell you all sorts of statistics, such as: cache directory /home/vstehle/.ccache cache hit (direct) 10852 cache hit (preprocessed) 3225 cache miss 19000 called for link 33267 called for preprocessing 9463 compile failed 3 preprocessor error 1 couldn't find the compiler 117 unsupported source language 921 unsupported compiler option 2167 no input file 31681 files in cache 51694 cache size 1.3 Gbytes max cache size 4.0 Gbytes Here you see a somewhat typical 50%/50% hit/miss ratio. Enjoy! See Also ccache is usually supported natively by build systems, such as Buildroot or Yocto.

Q: how to do PCIe compliance measurement on the Sabre SDB? Phase Jitter on the PCIe reference clock had been see problem. Pin C7 "CLK1_N" and Pin D7 "CLK1_P" were used like on the Sabre SD. During Compliance meassurments margin of -80% and more.... was seen. Is there a known issue? Has someone done a similar compliance measurement on the Sabre SDB? A: The PCIe TX compliance tests on i.MX6 SD boards in TK's Open Lab. Based on the internal PLL clock, i.MX6 SD boards pass the PCIe TX compliance tests. 1, please check the capacitor on NVCC_PLL_OUT, it should no less than 10uF, 22uF is better. 2, please check if the 24MHz input crystal is good enough. 50ppm is required. 3, please check the test step: 1.1 TX Test Configuration and Procedures Overview of Test Steps 1. Integrate the patch for PCIE test to mainline, recompile the Kernel , and replace the old image of the board under test. · Make sure the following configuration has been set, when re-compiling the kernel image. # MX6 Options: # CONFIG_IMX_PCIE=y 2. Correctly set up the test environment: · Connect the compliance load board (CLB x1/x16) revision 2.0 into the slot of DUT, and change the switch and jumpers to select x1 . · Connect the lane under test to oscilloscope via differential probe and matched coaxial , do remember that cable calibration should be done before test. · Connect the clock signal to the oscilloscope. The clock must have SSC enabled or disabled to be consistent with settings for the system during normal operation. · Power on the system. 3. After I.MX6x enters Polling.Compliance , press the Toggle Button on CLB to select the output , make sure the data waveform is compliance pattern, 5.0GT/s for GEN2, 2.5GT/s for GEN1. 4. Follow the Oscilloscope operation instruction, set it to the right mode. 5. Capture and save at least 1 million * 200 ps of data and clock simultaneously at the sample rate of 50GS/s for GEN2, or 250,000 UI * 400 ps of data at the sample rate of 25GS/s for GEN1. 6. Run free software Sigtest to analyze the PCIE TX signal. 7. Customer could adjust the parameters of the PCIE_PHY by changing IOMUXC_GPR8 register settings to get the test past. a. The default of this Register is configured as: imx_pcie_clrset(IOMUXC_GPR8_TX_DEEMPH_GEN1, 0 << 0, IOMUXC_GPR8); imx_pcie_clrset(IOMUXC_GPR8_TX_DEEMPH_GEN2_3P5DB, 0 << 6, IOMUXC_GPR8); imx_pcie_clrset(IOMUXC_GPR8_TX_DEEMPH_GEN2_6DB, 20 << 12, IOMUXC_GPR8); imx_pcie_clrset(IOMUXC_GPR8_TX_SWING_FULL, 127 << 18, IOMUXC_GPR8); imx_pcie_clrset(IOMUXC_GPR8_TX_SWING_LOW, 127 << 25, IOMUXC_GPR8); b. write the Register, Address: 20E_0000h base + 20h offset = 20E_0020h; command: /unit_tests/memtool -32 0x020e0020= FFFD4000 This document was generated from the following discussion: i.Mx6 PCIe compliance

Update 2 Nov 2016: The work begun with this current sensor board has been superseded by this 4-channel solution. The ribbon cables used below, although easier to solder, were very stiff and tended to lift the sensors off the double sticky foam tape, which endangered the target application board. This post remains for historical purposes. This little board set was put together quickly to measure run current as well as sleep current. The sensor board is intended to be affixed with double sided tape to the board under test. A flat ribbon cable connects to the connection board where the power and current sensor connections may be made. The holes accommodate banana jacks. The current range is selected via the dip switch on the connection board. Below is an image of the schematic. The attached PDF contains the schematic, layout and partial Digikey parts lists along with embedded source files (look for the thumb-tacks). The DMN1019USN FETs have a Vgs of 8V, which limits the maximum current which may be measured (currents above will starve the output of the current sensor amplifiers since the output cannot swing high enough). With a supply of ~7.5V, a maximum high current of ~3A is possible with the 2V/A gain (A4) version of the INA250. With a 2 Ohm shunt for the low current range, the maximum current with an INA212 (1000V/V gain) is ~3mA. Two FETs in parallel were used to decrease the series resistance when shorting the low current shunt. [NOTE: The voltage applied to the gates of the FETs assumes that the ground on the both board under test and the current sense board combo are in common. An isolated supply could have been used but was not for simplicity.] The high current range is intended for normal operation, i.e., measuring run currents.The low current range should only be selected once the board is configured for a low power mode. Once in that mode, the low power mode may be selected. To use an instrumented target board without having to have the connection board hooked up and powered, jump the two vias (spaced 0.1", labeled "Jump" by the current input connections). These vias short the 2 Ohm low current shunt resistor. The target board is connected via the 3-pin header. The outer two points are the negative input connection; the center is the positive. Two negative connections are provided to avoid having to cross the connection wires. These wires should be kept as short as possible. The series resistance at the input in the high range (dip switch off) was under 25mOhms, so the connections wires only add to that. The board set may be used as-is before snapping apart since connections between the boars runs through the row of snap-vias. A ribbon cable needs be used after snapping them apart. Finer pitch ribbon could have been used but it'd be much less friendly for hand soldering. Board sets in multiples of 3 may be ordered here. Here are some photos of the prototype board (some silk screen errors and the banana jack holes were drilled too small). Before snapping apart on the left and after with the ribbon cable and connectors added on the right. Here is a photo of the i.MX6SL on the EVK instrumented for low-power sleep-mode current measurement on VDD_HIGH_IN: SENSOR CALIBRATION CHECK: The calibration of three sensor boards was checked by forcing an accurate, known current with a Keysight B2902A Source Measure Unit (SMU). The average sensor output was measured for each forced current in the high and low range. The data was plotted and best fit lines were applied: The data for each sensor was very linear. The coefficients and offsets of all 6 best fit lines were very similar as can be seen above. The data can be perused in the attached Excel file (HiLo-sensors-1-3-calib.xlsx). The three sets of coefficients for the high range sensor (the INA250A4) were averaged. For each sensor's output, the current was calculated using these averaged coefficients and tabulated next to the forced current (the brown data). All of the calculated currents were within at most 20mA of the actual current forced by the SMU. TO DO: Two outputs are somewhat cumbersome; it'd be handier to just switch which sensor is outputting to the measurement device. It'd also be really handy to have a 4 channel distribution board and 4 sensor boards, which would allow the use of a 4 channel oscilloscope. Some LEDs on the distribution board indicating which measurement range is in use would also be nice... UPDATE 7 OCT 2016: Working now on a Kinetis-based, data-logging capable, 4-channel power profiler for run and sleep. The Kinetis ADCs will be used to measure the sensor outputs and power supply rail voltages, which should be fine given the level of accuracy that is required. Data is sent up the line in real time via a USB serial port, which opens the possibility of the target board profiling it's own power consumption, including low power modes (a wake-up line for the target board is provided for just that purpose). For more information on current measurements in general, see this tutorial series: A Current Sensing Tutorial--Part 1: Fundamentals | EE Times A Current Sensing Tutorial-Part II: Devices | EE Times A Current Sensing Tutorial--Part III: Accuracy | EE Times A Current Sensing Tutorial-Part IV: Layout and Troubleshooting Guidelines | EE Times

Introduction to Linux In 1989, a Finnish student called Linus Torvalds started an improvement work of Minix's Kernel, an operational system like Unix wrote by Andrew Tannenbaum, calling his own Kernel as Linux, a mix of Linus and Minix. The main idea about this new Kernel is that it's free. Anyone can develop to improve the Kernel, share the software, change it specific application and distribute without any fee or restriction. All the code is open. Finally, in 1991, Linus launched the first official Linux version, later joining Richard Stallman's GNU project in 1992 with the objective to produce the complete operational system that we know today. Linux had fast success on the x86 architecture and soon it had ported for various processor architectures and became very popular on embedded devices in many different applications like automotive, industrial, telecommunications, consumer and internet appliances. The use of Linux in embedded devices has many advantages: Supports many devices, file systems, networking protocols High portability, since it has been ported for many CPU architectures Large number of ready applications Mature source code with constant actualization Large community of programmers and users over the world testing and adding new features Which Linux distribution should I install on my PC? There are many distributions of Linux available for free. Below are a list of some of them: Ubuntu (IPA: [uːˈbuːntuː] in English,[3][ùbúntú] in Zulu) is an operating system for desktops, laptops, and servers. It has consistently been rated among the most popular of the many Linux distributions. Ubuntu's goals include providing an up-to-date yet stable Linux distribution for the average user and having a strong focus on usability and ease of installation. It is a derivative of Debian, another popular distribution. Ubuntu is sponsored by Canonical Ltd, owned by South African entrepreneur Mark Shuttleworth. The name of the distribution comes from the African concept of ubuntu which may be rendered roughly as "humanity toward others", "we are people because of other people", or "I am who I am because of who we all are", though other meanings have been suggested. This Linux distribution is named as such to bring the spirit of the philosophy to the software world. Ubuntu is free software and can be shared by any number of users. Kubuntu and Xubuntu are official subprojects of the Ubuntu project, aiming to bring the KDE and Xfce desktop environments, respectively, to the Ubuntu core (by default Ubuntu uses GNOME for its desktop environment). Edubuntu is an official subproject designed for school environments, and should be equally suitable for children to use at home. Gobuntu is an official subproject that is aimed at adhering strictly to the Free Software Foundation's Four Freedoms. The newest official subproject is JeOS. Ubuntu JeOS (pronounced "Juice") is a concept for what an operating system should look like in the context of a virtual appliance. Ubuntu releases new versions every six months, and supports those releases for 18 months with daily security fixes and patches to critical bugs. LTS (Long Term Support) releases, which occur every two years, are supported for 3 years for desktops and 5 years for servers. The most recent LTS version, Ubuntu 10.04 LTS (Lucid Lynx), was released on 29 April 2010. The current non-LTS version is 10.10 (Maverick Meerkat) released on 10/10/10 (10 October 2010). Click here for official site Mandriva Linux (formerly Mandrakelinux or Mandrake Linux) is a Linux distribution created by Mandriva (formerly Mandrakesoft). It uses the RPM Package Manager. The product lifetime of Mandriva Linux releases is 18 months for base updates and 12 months for desktop updates. Click here for official site openSUSE, (pronounced /ˌoʊpɛnˈsuːzə/), is a community project, sponsored by Novell and AMD, to develop and maintain a general purpose Linux distribution. After acquiring SUSE Linux in January 2004, Novell decided to release the SUSE Linux Professional product as a 100% open source project, involving the community in the development process. The initial release was a beta version of SUSE Linux 10.0, and as of October 2007 the current stable release is openSUSE 10.3. Beyond the distribution, openSUSE provides a web portal for community involvement. The community assists in developing openSUSE collaboratively with representatives from Novell by contributing code through the open Build Service, writing documentation, designing artwork, fostering discussion on open mailing lists and in Internet Relay Chat channels, and improving the openSUSE site through its wiki interface. Novell markets openSUSE as the best, easiest distribution for all users. Like most distributions it includes both a default graphical user interface (GUI) and a command line interface option; it allows the user (during installation) to select which GUI they are comfortable with (either KDE, GNOME or XFCE), and supports thousands of software packages across the full range of open source development. Click here for official site Fedora is an RPM-based, general purpose Linux distribution, developed by the community-supported Fedora Project and sponsored by Red Hat. Fedora's mission statement is: "Fedora is about the rapid progress of Free and Open Source software." One of Fedora's main objectives is not only to contain free and open source software, but also to be on the leading edge of such technologies. Also, developers in Fedora prefer to make upstream changes instead of applying fixes specifically for Fedora – this ensures that updates are available to all Linux distributions. Click here for official site Debian (pronounced [ˈdɛbiən]) is a computer operating system (OS) composed entirely of software which is both free and open source (FOSS). Its primary form, Debian GNU/Linux, is a popular and influential Linux distribution. It is a multipurpose OS; it can be used as a desktop or server operating system. Debian is known for strict adherence to the Unix and free software philosophies. Debian is also known for its abundance of options — the current release includes over twenty-six thousand software packages for eleven computer architectures. These architectures range from the Intel/AMD 32-bit/64-bit architectures commonly found in personal computers to the ARM architecture commonly found in embedded systems and the IBM eServer zSeries mainframes. Throughout Debian's lifetime, other distributions have taken it as a basis to develop their own, including: Ubuntu, MEPIS, Dreamlinux, Damn Small Linux, Xandros, Knoppix, Linspire, sidux, Kanotix, and LinEx among others. A university's study concluded that Debian's 283 million source code lines would cost 10 billion USA Dollars to develop by proprietary means. Prominent features of Debian are its APT package management system, its strict policies regarding its packages and the quality of its releases. These practices afford easy upgrades between releases and easy automated installation and removal of packages. Debian uses an open development and testing process. It is developed by volunteers from around the world and supported by donations through SPI, a non-profit umbrella organization for various free software projects. The default install provides popular programs such as: OpenOffice, Iceweasel (a rebranding of Firefox), Evolution mail, CD/DVD writing programs, music and video players, image viewers and editors, and PDF viewers. Only the first CD/DVD is necessary for the default install; the remaining discs contain all 26,000+ extra programs and packages currently available. If a user does not wish to download the CDs/DVDs, these extras can be downloaded and installed separately using the package manager. Debian can also be configured to download and install updates automatically. Click here for official site Slackware is a Linux distribution created by Patrick Volkerding of Slackware Linux, Inc. Slackware was one of the earliest distributions, and is the oldest currently being maintained. Slackware aims for design stability and simplicity, and to be the most Unix-like GNU/Linux distribution. Click here for official site

For more information visit: http://www.silexamerica.com/freescale/index.html Andy C. Ross, our Field Applications Engineer, demonstrates how to enable wireless connectivity to your i.MX 6 platform. This 6-minute video tutorial shows how easy it is to enable Wi-Fi on your Freescale platform using Silex's evaluation kit, the SX-6K3-EVK-SD. The SX-6K3-EVK-SD is designed to provide the optimum platform with which to evaluate the Wireless Radio Module and Silex Radio Driver with the Freescale’s i.MX6 processor on the Sabre Smart Devices board. This video walks you step by step on how to enable Wi-Fi connectivity for your i.MX 6 Platform.

目录 1 www.nxp.com公网资源 .............................................. 2 1.1 www.nxp.com Documentation ................................ 3 1.2 www.nxp.com Tools&Software ............................... 6 2 nxp 社区资源 ........................................................... 11 3 i.MX8M公网资源的其它资料 .................................... 13 4 i.MX8MNano公网资源的其它资料 ............................ 13 5 i.MX8MPlus公网资源的其它资料 ............................. 13

NFS Network File System (NFS) is a network file system protocol originally developed by Sun Microsystems in 1984, allowing a user on a client computer to access files over a network as easily as if the network devices were attached to its local disks. The use of NFS makes the development work of user space applications easy and fast since all target root file system is located into host (PC) where the applications can be developed and crosscompiled to target system. The target system will use this file system located on host as if it is located on target. NFS service will be used to transfer the root file system from host to target. NFS resources are listed below: All Boards Deploy NFS All Boards NFS on Fedora NFS on Fedora All Boards NFS on Slackware NFS on Slackware All Boards NFS on Ubuntu NFS on Ubuntu

After upgrading Ubuntu 11.04 to 11.10, I encountered several building failures such as the following: error:"_FORTIFY_SOURCE" redefined [-Werror] To fix this building issue: 1. Following guides in Initializing a Build Environment | Android Open Source, to get build env ready for Ubuntu 11.10; 2. Edit build/core/combo/HOST_linux-x86.mk and replace: "HOST_GLOBAL_CFLAGS += -D_FORTIFY_SOURCE=0" with "HOST_GLOBAL_CFLAGS += -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=0" Based on further Internet research, I found a Google Groups that summarizes all modifications to fix the building failure encountering in Ubuntu 11.10.

i.MXプロセッサナレッジベース

i.MX Processors Knowledge Base

ディスカッション

Info about softISP, eIQ

Add support RS485 half duplex

All Boards Updating RedBoot Through RedBoot

将含有C0芯片的i.MX 8QuadXPlus MEK的DRP更改为DFP

Compiling Android8.1.0-1.3.0 BSP For i.MX8MQ-EVK On Ubuntu18.04 LTS

xag

Speeding up your recurring gcc compilations with ccache

QA: About i.Mx6 PCIe compliance

[deprecated] Hi-Lo Current Sensor Combo Board

About Linux

How to add Wi-Fi to Freescale i.MX 6

GTK

MX8M_Series_Design_Resource_Guide_V1-20200228_chn.

NFS

Patch to enable SSI_ASRC_P2P capture function for SebreSD board

0001-Fix-g_print-segmentation-fault-with-p-in-glib2.patch

使weston-terminal支持显示汉字

Build Android 4.0 ICS under Ubuntu 11.10

142-00207-517_iMX6X_SX-SDCAN_BT.pdf

i.MX JTAG热插拔，无需重置

i.MXプロセッサ ナレッジベース

i.MX Processors Knowledge Base

ディスカッション

i.MXプロセッサナレッジベース