通過(guò)Ycoto Project定制嵌入式Y(jié)coto Linux鏡像

By Toradex秦海

1). 簡(jiǎn)介

嵌入式設(shè)備采用Embedded Linux操作系統(tǒng)進(jìn)行開(kāi)發(fā)已經(jīng)越來(lái)越成為主流，但是如何將開(kāi)發(fā)完成的Linux uboot/kernel配置，以及應(yīng)用程序整合到Embedded Linux鏡像中以便在量產(chǎn)的時(shí)候更方便的更新到嵌入式設(shè)備中可能是很多嵌入式開(kāi)發(fā)者面臨的挑戰(zhàn)之一，而本文就以在Embedded Linux中使用比較廣泛的Yocto project 為例，基于Openembedded開(kāi)發(fā)框架定制嵌入式 Linux鏡像。

本文所演示的平臺(tái)來(lái)自于Toradex Colibri iMX8x嵌入式平臺(tái)，這個(gè)平臺(tái)是基于近年發(fā)布的NXP iMX8x系列ARM處理器，核心為Cortex-A35。同時(shí)Toradex也提供了基于Ycoto project/Poky 編譯發(fā)布的嵌入式Ycoto Linux Demo鏡像，這樣就無(wú)需完全從頭開(kāi)始配置自己的layer，只需要修改添加需要的部分即可。

2. 準(zhǔn)備

a). Colibri iMX8x ARM核心版配合Colibri Eva Board 載板，并連接7inch Display，用于測(cè)試編譯好的Ycoto Linux image。

b). 配置Ycoto Project/Openembedded開(kāi)發(fā)環(huán)境，請(qǐng)參考這里說(shuō)明，本文測(cè)試使用目前最新的分支dunfell-5.x.y。

c). 參考這里說(shuō)明下載Toradex Ycoto Linux BSP 5.x.y版本Kernel和Uboot源代碼，用于產(chǎn)生相應(yīng)的patch文件。

c). 本文演示的定制Ycoto Linux鏡像主要添加修改以下內(nèi)容，下面會(huì)按照這個(gè)內(nèi)容逐一說(shuō)明：

./ 修改Uboot默認(rèn)環(huán)境變量，適配Splash開(kāi)機(jī)啟動(dòng)畫(huà)面，關(guān)于Splash啟動(dòng)畫(huà)面的詳細(xì)修改說(shuō)明可以參考這里說(shuō)明；修改后續(xù)要默認(rèn)啟動(dòng)加載的定制化device tree命名 imx8qxp-colibri-customer-v1.dtb

./ 修改Linux Kernel，增加并使能定制化Splash開(kāi)機(jī)啟動(dòng)畫(huà)面圖片；同時(shí)修改Linux device tree文件，使能Colibri iMX8x自帶的兩路FlexCAN驅(qū)動(dòng)并關(guān)閉默認(rèn)打開(kāi)的載板SPI CAN驅(qū)動(dòng)，并保存為定制化device tree文件imx8qxp-colibri-customer-v1.dtb；最后配置默認(rèn)啟動(dòng)適配7inch Display的Device Tree Overlay文件

./ 將演示Qt應(yīng)用程序集成到Image，并配置為開(kāi)機(jī)自動(dòng)啟動(dòng)

3). 創(chuàng)建定制Ycoto Linux 相關(guān)配置Layer

a). 在配置下載好的OpenEmbedded環(huán)境Layer目錄下，由于Toradex默認(rèn)已經(jīng)包含meta-toradex-demos layer用于Toradex Ycoto Linux Demo Image編譯，我們這里直接基于這個(gè)layer創(chuàng)建用于定制化的Layer – meta-customer-demos.

--------------------------------

### create customer layer meat-customer-demos ###

$ cd cd .../oe-core/layer

$ cp -r meta-toradex-demos/ meta-customer-demos

--------------------------------

b). 修改meta-customer-demos目錄下的 conf/layer.conf文件，適配新的layer命名，同時(shí)include machine配置文件

--------------------------------

diff --git a/conf/layer.conf b/conf/layer.conf

index 954e4f8..ab8afb6 100644

--- a/conf/layer.conf

+++ b/conf/layer.conf

@@ -1,12 +1,15 @@

+# Include extra machine setting

+include conf/machine/${MACHINE}-extra.conf

+

 # We have a conf and classes directory, append to BBPATH

 BBPATH .= ":${LAYERDIR}"

 # We have recipes-* directories, add to BBFILES

 BBFILES += "${LAYERDIR}/recipes-*/*/*.bb ${LAYERDIR}/recipes-*/*/*.bbappend"

-BBFILE_COLLECTIONS += "toradex-demos"

-BBFILE_PATTERN_toradex-demos = "^${LAYERDIR}/"

-BBFILE_PRIORITY_toradex-demos = "24"

+BBFILE_COLLECTIONS += "customer-demos"

+BBFILE_PATTERN_customer-demos = "^${LAYERDIR}/"

+BBFILE_PRIORITY_customer-demos = "24"

 # Let us add layer-specific bbappends which are only applied when that

 # layer is included in our configuration

@@ -16,11 +19,11 @@ BBFILES += "${@' '.join('${LAYERDIR}/%s/recipes*/*/*.bbappend' % layer \

 BBFILES += "${@' '.join('${LAYERDIR}/%s/recipes*/*/*.bb' % layer \

                for layer in BBFILE_COLLECTIONS.split())}"

-LAYERDEPENDS_toradex-demos = " \

+LAYERDEPENDS_customer-demos = " \

     core \

     yocto \

     openembedded-layer gnome-layer multimedia-layer networking-layer \

     freescale-layer \

     freescale-distro \

 "

-LAYERSERIES_COMPAT_toradex-demos = "zeus dunfell"

+LAYERSERIES_COMPAT_customer-demos = "zeus dunfell"

--------------------------------

c). 在meta-customer-demos/conf 目錄下創(chuàng)建 machine/colibri-imx8x-extra.conf文件，為設(shè)備增加新的定制化設(shè)備樹(shù)文件

--------------------------------

$ mkdir -p .../oe-core/layers/meta-customer-demos/conf/machine

$ vi .../oe-core/layers/meta-customer-demos/conf/machine/colibri-imx8x-extra.conf

KERNEL_DEVICETREE_append = " \

    freescale/imx8qxp-colibri-customer-v1.dtb \

"

--------------------------------

4). OpenEmbedded下Uboot修改示例

a). 為了后續(xù)配置Splash開(kāi)機(jī)畫(huà)面正常顯示，需要修改 U-boot 環(huán)境變量去除顯示輸出的 console 打印輸出。

b). 首先進(jìn)入下載的Uboot源代碼對(duì) include/configs/colibri_imx6.h 文件進(jìn)行修改，產(chǎn)生相應(yīng)的patch文件

0001-uboot-env-update.patch

--------------------------------

diff --git a/include/configs/colibri-imx8x.h b/include/configs/colibri-imx8x.h

index 2c6a88de80..e2c1b28e31 100644

--- a/include/configs/colibri-imx8x.h

+++ b/include/configs/colibri-imx8x.h

@@ -94,7 +94,7 @@

        "console=ttyLP3,115200 earlycon=lpuart32,0x5a090000,115200\0" \

        "fdt_addr=0x83000000\0" \

        "fdt_high=\0" \

-       "fdt_board=eval-v3\0" \

+       "fdt_board=customer-v1\0" \

        "finduuid=part uuid mmc ${mmcdev}:2 uuid\0" \

        "image=Image\0" \

        "initrd_addr=0x83800000\0" \

@@ -109,6 +109,7 @@

                "setexpr blkcnt ${filesize} + 0x1ff && setexpr blkcnt " \

                "${blkcnt} / 0x200; mmc dev 0 1; mmc write ${loadaddr} 0x0 " \

                "${blkcnt}; fi\0" \

+       "setupargs=vt.global_cursor_default=0 consoleblank=0 console=${console}\0" \

        "vidargs=video=imxdpufb5:off video=imxdpufb6:off video=imxdpufb7:off\0"

 /* Link Definitions */

--------------------------------

c). 在 meta-customer-demos layer目錄下創(chuàng)建 recipes-bsp/u-boot/files目錄，并對(duì)Colibri iMX8x默認(rèn)使用的 u-boot-toradex_2020.04.bb 文件進(jìn)行append，集成上面生成的patch

--------------------------------

### prepare patch file ###

$ mkdir -p recipes-bsp/u-boot/files

$ cd .../recipes-bsp/u-boot/

$ cp .../0001-uboot-env-update.patch files/

### crteate bbappend file ###

$ vi u-boot-toradex_2020.04.bbappend

FILESEXTRAPATHS_prepend := "${THISDIR}/files:"

SRC_URI_append = " \

    file://0001-uboot-env-update.patch \

"

--------------------------------

d). 另外這里也提示下，U-boot環(huán)境變量的修改也可以通過(guò)修改Ycoto編譯生成的Image壓縮包文件里面的 ” u-boot-initial-env-sd ” 文件來(lái)更改，這樣通過(guò)Toradex Easy Installer更新到模塊后就是修改后的變量配置了，對(duì)于某些場(chǎng)景可能更方便一些，不一定需要上述在Ycoto編譯環(huán)境通過(guò)修改源碼的方式進(jìn)行修改。

5). OpenEmbedded下Linux kernel 和 device tree 修改示例

a). 參考上述 ”準(zhǔn)備“ 章節(jié)提到的Splash啟動(dòng)畫(huà)面文章生成Logo文件 “l(fā)ogo_custom_clut224.ppm ” 和menuconfig修改后的Kernel 配置文件 ”.config”，并重命名為 ”defconfig”

--------------------------------

→ Device Drivers → Graphics support → Bootup logo

<*>   Custom 224-color Linux logo

--------------------------------

b). 創(chuàng)建定制化Device Tree文件 ”imx8x-colibri-customer-v1.dtsi” 和 “imx8qxp-colibri-customer-v1.dts” ，用于關(guān)閉Colibri iMX8x默認(rèn)使能的Colibri Eva Board的板載MCP2515 CAN控制器，同時(shí)使能Imx8x芯片自帶的兩路FlexCAN接口。

./ “imx8x-colibri-customer-v1.dtsi” 相對(duì)于默認(rèn)的 “imx8x-colibri-eval-v3.dtsi” 文件改動(dòng)如下

--------------------------------

--- arch/arm64/boot/dts/freescale/imx8x-colibri-eval-v3.dtsi 2022-06-16 17:38:34.293724009 +0800

+++ arch/arm64/boot/dts/freescale/imx8x-colibri-customer-v1.dtsi 2022-06-20 17:49:30.735567256 +0800

@@ -88,7 +88,7 @@

   interrupt-parent = <&lsio_gpio3>;

   interrupts = <13 IRQ_TYPE_EDGE_FALLING>;

   spi-max-frequency = <10000000>;

-  status = "okay";

+  status = "disabled";

  };

  /* To keep the CAN controller enabled by default,

   * disable conflicting spidev. This spidev device

@@ -182,3 +182,24 @@

 &vpu_lpcg {

  status = "okay";

 };

+

+&flexcan1 {

+        status = "okay";

+};

+

+&flexcan2 {

+        status = "okay";

+};

+

+&iomuxc {

+        //pinctrl-names = "default";

+        //pinctrl-0 = <&pinctrl_lpuart0>;

+        colibri-imx8qxp {

+        pinctrl_lpuart0: lpuart0grp {

+                        fsl,pins = <

+                                IMX8QXP_UART0_RX_ADMA_UART0_RX                  0x06000020      /* SODIMM  36 */

+                                IMX8QXP_UART0_TX_ADMA_UART0_TX                  0x06000020      /* SODIMM  38 */

+                        >;

+                };

+        };

+};

--------------------------------

./ “imx8qxp-colibri-customer-v1.dts” 相對(duì)于默認(rèn)的 “imx8qxp-colibri-eval-v3.dts” 文件改動(dòng)如下：

--------------------------------

--- arch/arm64/boot/dts/freescale/imx8qxp-colibri-eval-v3.dts 2022-06-16 17:38:34.289723980 +0800

+++ arch/arm64/boot/dts/freescale/imx8qxp-colibri-customer-v1.dts 2022-06-20 17:45:04.354142165 +0800

@@ -6,11 +6,11 @@

 /dts-v1/;

 #include "imx8qxp-colibri.dtsi"

-#include "imx8x-colibri-eval-v3.dtsi"

+#include "imx8x-colibri-customer-v1.dtsi"

 / {

- model = "Toradex Colibri iMX8QXP on Colibri Evaluation Board V3";

- compatible = "toradex,colibri-imx8x-eval-v3",

+ model = "Toradex Colibri iMX8QXP on Customer Carrier Board V1";

+ compatible = "toradex,colibri-imx8x-customer-v1",

        "toradex,colibri-imx8x",

        "fsl,imx8qxp";

 };

--------------------------------

./ 修改 Makefile 文件，增加新的定制化Device Tree文件

--------------------------------

--- a/arch/arm64/boot/dts/freescale/Makefile

+++ b/arch/arm64/boot/dts/freescale/Makefile

@@ -174,6 +174,8 @@ dtb-$(CONFIG_ARCH_MXC) += imx8qxp-mek.dtb imx8qxp-mek-dsp.dtb imx8qxp-mek-ov5640

                          imx8dx-colibri-aster.dtb \

                          imx8qxp-colibri-eval-v3.dtb \

                          imx8dx-colibri-eval-v3.dtb \

+                         imx8qxp-colibri-customer-v1.dtb \

+                          imx8dx-colibri-customer-v1.dtb \

                          imx8qxp-colibri-iris.dtb \

                          imx8dx-colibri-iris.dtb \

                          imx8dx-colibri-iris-v2.dtb \

--------------------------------

./ 創(chuàng)建完成后，通過(guò) ”git add” 命令添加兩個(gè)新文件，然后通過(guò) “git diff” 命令可以生成用于Ycoto編譯集成的patch文件，命名為 ”0001-imx8qxp-colibri-customer-v1.patch”

c). 在 meta-customer-demos layer目錄下創(chuàng)建 recipes-kernel/linux目錄，并對(duì) linux-toradex_5.4-2.3.x.bb 文件進(jìn)行append，同時(shí)創(chuàng)建files目錄，存入defconfig、0001-imx8qxp-colibri-customer-v1.patch和 logo_custom_clut224.ppm三個(gè)文件以適配Splash圖片和Device Tree的修改

--------------------------------

### prepare patch file ###

$ mkdir -p recipes-kernel/linux/files

$ cd .../recipes-kernel/linux/

$ cp .../defconfig files/

$ cp .../logo_custom_clut224.ppm files/

$ cp .../0001-imx8qxp-colibri-customer-v1.patch files/

### crteate bbappend file ###

$ vi linux-toradex_5.4-2.3.x.bbappend

FILESEXTRAPATHS_prepend := "${THISDIR}/files:"

SRC_URI_append = " \

    file://0001-imx8qxp-colibri-customer-v1.patch \

    file://defconfig \

    file://logo_custom_clut224.ppm \

"

do_configure_prepend() {

    # logo support, if you supply logo_custom_clut224.ppm in SRC_URI, then it's going to be used

    if [ -e ${WORKDIR}/logo_custom_clut224.ppm ]; then

        install -m 0644 ${WORKDIR}/logo_custom_clut224.ppm ${S}/drivers/video/logo/logo_custom_clut224.ppm

    fi

}

--------------------------------

d). 這里提示下在OpenEmbedded環(huán)境下，也可以通過(guò)下面命令在編譯系統(tǒng)中直接修改Kernel 配置，不過(guò)由于不如上述patch方式維護(hù)方便，只應(yīng)臨時(shí)測(cè)試使用，不建議實(shí)際部署編譯時(shí)候用這樣的方式修改。

--------------------------------

$ bitbake -c menuconfig virtual/kernel

--------------------------------

6). OpenEmbedded下Linux rootfs 文件系統(tǒng)中配置文件修改示例

a). 在 meta-customer-demos/recipes-kernel/linux目錄下創(chuàng)建device-tree-overlays_git.bbappend文件，以完成Splash開(kāi)機(jī)畫(huà)面文章中章節(jié)7中對(duì)于顯示分辨率的適配

--------------------------------

$ cd meta-customer-demos/recipes-kernel/linux/

$ vi device-tree-overlays_git.bbappend

TEZI_EXTERNAL_KERNEL_DEVICETREE_BOOT = " \

        colibri-imx8x_parallel-rgb_overlay.dtbo \

        display-lt161010_overlay.dtbo \

"

--------------------------------

b). 在 meta-customer-demos layer目錄下創(chuàng)建 recipes-graphics/wayland 目錄，并對(duì) weston-init.bb 文件進(jìn)行append，同時(shí)創(chuàng)建files目錄，存入如下Patch文件以完成Splash開(kāi)機(jī)畫(huà)面文章中章節(jié)9.a中對(duì)Weston桌面顯示的修改配置

--------------------------------

### create bbappend file ###

$ cd meta-customer-demos

$ mkdir -p recipes-graphics/wayland/

$ cd recipes-graphics/wayland/

$ vi weston-init.bbappend

FILESEXTRAPATHS_prepend := "${THISDIR}/files:"

SRC_URI_append = " \

    file://0001-weston-env.patch  \

"

### create patch file ###

$ mkdir files

$ cd files

$ vi 0001-weston-env.patch

--- a/weston.ini        2022-04-29 13:28:14.445478543 +0800

+++ b/weston.ini        2022-06-21 16:47:00.794980329 +0800

@@ -4,8 +4,10 @@

 #use-g2d=1

 #xwayland=true

-#[shell]

+[shell]

 #size=1920x1080

+panel-position=none

+background-color=0x00FFFFFF

 #[output]

 #name=HDMI-A-1

--------------------------------

7). OpenEmbedded下部署Qt應(yīng)用示例

a). 本文所使用的Qt 應(yīng)用demo說(shuō)明請(qǐng)參考下面文章：

http://blog.sina.com.cn/s/blog_d733e5170102wyay.html 

b). Ycoto Linux Multimedia Demo Image在Colibri iMX8x模塊上面默認(rèn)啟動(dòng)的是Qt Cinema示例應(yīng)用

./ Qt Cinema 示例應(yīng)用bb文件，包括編譯應(yīng)用源碼以及安裝啟動(dòng)腳本

--------------------------------

.../oe-core/layers/meta-qt5/recipes-qt/examples/cinematicexperience_1.0.bb

--------------------------------

./ wayland app launch bb文件，通過(guò)設(shè)定wayland-app-launch systemd服務(wù)啟動(dòng)項(xiàng)目，來(lái)達(dá)到開(kāi)機(jī)自動(dòng)啟動(dòng)的目的

--------------------------------

.../oe-core/layers/meta-toradex-demos/recipes-graphics/wayland-app-launch/wayland-qtdemo-launch-cinematicexperience_1.0.bb

--------------------------------

c). 基于上面示例，我們同樣方法配置Qt HelloworldUI 示例demo的編譯、安裝和自動(dòng)啟動(dòng)

./ 在 meta-customer-demos layer目錄下創(chuàng)建 qt5-layer/recipes-qt/qtdemo目錄，并創(chuàng)建如下 helloworldUI_0.1.bb 文件用于從Qt 應(yīng)用的git地址下載應(yīng)用并編譯部署

--------------------------------

$ mkdir -p .../oe-core/layers/meta-customer-demos/qt5-layer/recipes-qt/qtdemo

$ cd .../oe-core/layers/meta-customer-demos/qt5-layer/recipes-qt/qtdemo/

$ vi helloworldUI_0.1.bb

SUMMARY = "Qt5 demo application deployment"

DESCRIPTION = "Qt5 GPIO widget demo applicaiton"

LICENSE = "MIT"

LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4f302"

PR = "r0"

SRC_URI = "git://github.com/simonqin09/QtGPIOProject.git;protocol=git;branch=master"

SRCREV = "efac8dfeb878f104dfcfcf54188b25d024f2f16b"

S = "${WORKDIR}/git/helloworldUI"

DEPENDS = "qtbase"

RDEPENDS_${PN} = "qtbase-plugins"

require recipes-qt/qt5/qt5.inc

do_install() {

    install -d ${D}${datadir}/${P}

    install -m 0755 ${B}helloworldUI ${D}${datadir}/${P}

}

FILES_${PN} += "${datadir}"

--------------------------------

./ 創(chuàng)建對(duì)應(yīng)的wayland app launch bb文件

--------------------------------

$ vi .../oe-core/layers/meta-toradex-demos/recipes-graphics/wayland-app-launch/wayland-qtdemo-launch-helloworldUI_1.0.bb

# set the following variable to your one and only application which should

# be launched right after weston started

INITIAL_APP_PKGS ?= "helloworldUI qtwayland"

INITIAL_PATH ?= ""

APPLICATION_ENVIRONMENT ?= '\"QT_QPA_PLATFORM=wayland-egl\"'

WAYLAND_APPLICATION ?= "/usr/share/helloworldUI-1.0/helloworldUI --fullscreen"

require wayland-app-launch.inc

--------------------------------

8). OpenEmbedded下設(shè)置自定義image鏡像編譯

a). 在 meta-customer-demos/recipes-images/images/ 目錄下創(chuàng)建定制化Ycoto Linux Image BB文件，基于Toradex默認(rèn)的Multimeida Demo Image。如果需要修改Image里面包含的組件也可以直接在這個(gè)文件里面修改。

--------------------------------

### create bbfile ###

$ cd .../oe-core/layers/meta-customer-demos/recipes-images/images

$ cp tdx-reference-multimedia-image.bb customer-multimedia-image.bb

#### modify bbfile ###

--- recipes-images/images/tdx-reference-multimedia-image.bb     2022-06-16 16:48:23.435865928 +0800

+++ recipes-images/images/customer-multimedia-image.bb  2022-06-22 17:31:12.938956311 +0800

@@ -1,12 +1,12 @@

 require tdx-reference-minimal-image.bb

-SUMMARY = "Toradex Embedded Linux Reference Multimedia Image"

+SUMMARY = "Customer Embedded Linux Reference Multimedia Image"

 DESCRIPTION = "Image for BSP verification with QT and multimedia features"

 inherit populate_sdk_qt5

 #Prefix to the resulting deployable tarball name

-export IMAGE_BASENAME = "Reference-Multimedia-Image"

+export IMAGE_BASENAME = "Customer-Multimedia-Image"

 SYSTEMD_DEFAULT_TARGET = "graphical.target"

@@ -16,7 +16,7 @@

                                                        '', d), d)} \

 "

-APP_LAUNCH_WAYLAND ?= "wayland-qtdemo-launch-cinematicexperience"

+APP_LAUNCH_WAYLAND ?= "wayland-qtdemo-launch-helloworldui"

 APP_LAUNCH_WAYLAND_colibri-imx6ull ?= "wayland-qtdemo-launch-analogclock"

 APP_LAUNCH_WAYLAND_colibri-imx6ull-emmc ?= "wayland-qtdemo-launch-analogclock"

 APP_LAUNCH_WAYLAND_colibri-imx7 ?= "wayland-qtdemo-launch-analogclock"

--------------------------------

b). 至此，meta-customer-demos layer 的所有修改都已經(jīng)完成，下面我們進(jìn)入 OpenEmbedded編譯環(huán)境下 build/conf 目錄， 對(duì)下面兩個(gè)文件進(jìn)行修改：

./ bblayers.conf – 用定制化的meta-customer-demos layer替換默認(rèn)的meta-toradex-demos layer

--------------------------------

--- a/build/conf/bblayers.conf  2022-06-22 18:00:46.163360544 +0800

+++ b/build/conf/bblayers.conf  2022-06-16 16:51:46.159966787 +0800

@@ -23,7 +23,7 @@

   ${TOPDIR}/../layers/meta-openembedded/meta-multimedia \

   ${TOPDIR}/../layers/meta-openembedded/meta-python \

   ${TOPDIR}/../layers/meta-freescale-distro \

-  ${TOPDIR}/../layers/meta-toradex-demos \

+  ${TOPDIR}/../layers/meta-customer-demos \

   ${TOPDIR}/../layers/meta-qt5 \

   \

   \

--------------------------------

./ local.conf – 將默認(rèn)的machine 修改為 colibri-imx8x, 同樣也include設(shè)備額外的conf文件，最后增加了License聲明，如果需要一些額外的包和修改也可以在這個(gè)文件下修改

--------------------------------

--- a/build/conf/local.conf     2022-06-22 18:04:33.959385766 +0800

+++ b/build/conf/local.conf     2022-06-22 18:05:55.091394476 +0800

@@ -27,7 +27,7 @@

 #MACHINE ?= "colibri-imx6ull-emmc"

 #MACHINE ?= "colibri-imx7"

 #MACHINE ?= "colibri-imx7-emmc"

-#MACHINE ?= "colibri-imx8x"

+MACHINE ?= "colibri-imx8x"

 #

 #MACHINE ?= "verdin-imx8mm"

 #MACHINE ?= "verdin-imx8mp"

@@ -277,3 +277,9 @@

 include conf/machine/include/${MACHINE}.inc

 # DO NOT SET THE MACHINE AFTER THE ABOVE INCLUDE

+

+# Include extra machine setting

+include conf/machine/${MACHINE}-extra.conf

+

+# Freescale EULA

+ACCEPT_FSL_EULA = "1"

--------------------------------

f). 在 build目錄下執(zhí)行下面命令進(jìn)行編譯，編譯成功后， 可以在 deploy/images/colibri-imx8x 目錄下找到編譯好的 image 壓縮包。

--------------------------------

$ bitbake customer-mutimedia-image

--------------------------------

9). 在Colibri imx6模塊上面更新image并測(cè)試

a). 將上述生成好的image壓縮文件 Colibri-iMX8X_Customer-Multimedia-Image-Tezi_5.6.0-devel-20220623030838+build.0.tar 按照這里的說(shuō)明更新到 Colibri iMX8x 模塊上面去。

c). image 更新好后，我們可以逐項(xiàng)去測(cè)試上面每一個(gè)配置

./ Uboot

如下可見(jiàn)默認(rèn)環(huán)境變量的修改已經(jīng)生效

--------------------------------

Colibri iMX8X # printenv

…

fdt_board=customer-v1

...

setupargs=vt.global_cursor_default=0 consoleblank=0 console=${console}

…

--------------------------------

./ Kernel Config 修改

如下可見(jiàn)kernel增加的驅(qū)動(dòng)也已經(jīng)編譯進(jìn)去了，同時(shí)設(shè)備啟動(dòng)后Splash開(kāi)機(jī)畫(huà)面也正常顯示了

--------------------------------

root@colibri-imx8x-06748681:~# zcat /proc/config.gz |grep CONFIG_LOGO_CUSTOM

CONFIG_LOGO_CUSTOM_CLUT224=y

--------------------------------

./ Device Tree 修改

如下可見(jiàn)，兩路FlexCAN都以及正常使能

--------------------------------

root@colibri-imx8x-06748681:~# ip link show       

...

3: can0: <NOARP,ECHO> mtu 16 qdisc noop state DOWN mode DEFAULT group default qlen 10

    link/can

4: can1: <NOARP,ECHO> mtu 16 qdisc noop state DOWN mode DEFAULT group default qlen 10

    link/can

...

--------------------------------

./ Rootfs修改

如下可見(jiàn)，weston.ini文件修改已經(jīng)生效

--------------------------------

root@colibri-imx8x-06748681:~# vi /etc/xdg/weston/weston.ini

...

[shell]

#size=1920x1080

panel-position=none

background-color=0x00FFFFFF

...

--------------------------------

./ Qt 程序自啟動(dòng)

如下圖片

10). 總結(jié)

本文只是簡(jiǎn)單演示了利用 Ycoto/OpenEmbedded 可以非常方便的生成定制化 Embedded Linux，另外配合git，還可以很好的實(shí)現(xiàn)不同版本的管理。但是 OpenEmbedded 架構(gòu)本身也是比較復(fù)雜的，要想靈活使用還需要對(duì)其做一些深入的學(xué)習(xí)才能得心應(yīng)手，更多文檔可以參考如下OpenEmbedded官方網(wǎng)站。

https://www.openembedded.org/wiki/Main_Page