通過Ycoto Project定制嵌入式Y(jié)coto Linux鏡像
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By Toradex秦海
1). 簡介
嵌入式設(shè)備采用Embedded Linux操作系統(tǒng)進(jìn)行開發(fā)已經(jīng)越來越成為主流，但是如何將開發(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)的時候更方便的更新到嵌入式設(shè)備中可能是很多嵌入式開發(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開發(fā)框架定制嵌入式 Linux鏡像。
本文所演示的平臺來自于Toradex Colibri iMX8x嵌入式平臺，這個平臺是基于近年發(fā)布的NXP iMX8x系列ARM處理器，核心為Cortex-A35。同時Toradex也提供了基于Ycoto project/Poky 編譯發(fā)布的嵌入式Ycoto Linux Demo鏡像，這樣就無需完全從頭開始配置自己的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，用于測試編譯好的Ycoto Linux image。
b). 配置Ycoto Project/Openembedded開發(fā)環(huán)境，請參考這里說明，本文測試使用目前最新的分支dunfell-5.x.y。
c). 參考這里說明下載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，下面會按照這個內(nèi)容逐一說明：
./ 修改Uboot默認(rèn)環(huán)境變量，適配Splash開機(jī)啟動畫面，關(guān)于Splash啟動畫面的詳細(xì)修改說明可以參考這里說明；修改后續(xù)要默認(rèn)啟動加載的定制化device tree命名 imx8qxp-colibri-customer-v1.dtb
./ 修改Linux Kernel，增加并使能定制化Splash開機(jī)啟動畫面圖片；同時修改Linux device tree文件，使能Colibri iMX8x自帶的兩路FlexCAN驅(qū)動并關(guān)閉默認(rèn)打開的載板SPI CAN驅(qū)動，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，并配置為開機(jī)自動啟動
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開機(jī)畫面正常顯示，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 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 ” 文件來更改，這樣通過Toradex Easy Installer更新到模塊后就是修改后的變量配置了，對于某些場景可能更方便一些，不一定需要上述在Ycoto編譯環(huán)境通過修改源碼的方式進(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啟動畫面文章生成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，同時使能Imx8x芯片自帶的兩路FlexCAN接口。
./ “imx8x-colibri-customer-v1.dtsi” 相對于默認(rèn)的 “imx8x-colibri-eval-v3.dtsi” 文件改動如下
--------------------------------
--- 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” 相對于默認(rèn)的 “imx8qxp-colibri-eval-v3.dts” 文件改動如下：
--------------------------------
--- 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 ”git add” 命令添加兩個新文件，然后通過 “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 linux-toradex_5.4-2.3.x.bb 文件進(jìn)行append，同時創(chuàng)建files目錄，存入defconfig、0001-imx8qxp-colibri-customer-v1.patch和 logo_custom_clut224.ppm三個文件以適配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，也可以通過下面命令在編譯系統(tǒng)中直接修改Kernel 配置，不過由于不如上述patch方式維護(hù)方便，只應(yīng)臨時測試使用，不建議實(shí)際部署編譯時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開機(jī)畫面文章中章節(jié)7中對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 weston-init.bb 文件進(jìn)行append，同時創(chuàng)建files目錄，存入如下Patch文件以完成Splash開機(jī)畫面文章中章節(jié)9.a中對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說明請參考下面文章：
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腳本
--------------------------------
.../oe-core/layers/meta-qt5/recipes-qt/examples/cinematicexperience_1.0.bb
--------------------------------
./ wayland app launch bb文件，通過設(shè)定wayland-app-launch systemd服務(wù)啟動項(xiàng)目，來達(dá)到開機(jī)自動啟動的目的
--------------------------------
.../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、安裝和自動啟動
./ 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， 對下面兩個文件進(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)去測試上面每一個配置
./ Uboot
如下可見默認(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kernel增加的驅(qū)動也已經(jīng)編譯進(jìn)去了，同時設(shè)備啟動后Splash開機(jī)畫面也正常顯示了
--------------------------------
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，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，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
如下圖片
10). 總結(jié)
本文只是簡單演示了利用 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
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