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# LIMO_emmc2sd 说明书 | ||
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本文介绍 jetson 平台在 jetpack4.6 下,如何从 SD卡启动系统和刷机的方法 | ||
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软件平台:jetpack4.6(刷机用的镜像版本) | ||
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硬件环境:装配 ubuntu18.04 的电脑,nano 核心板+载板 | ||
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### 一、从SD卡启动系统 | ||
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#### 1、插入一张格式化过的SD卡 | ||
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打开终端,在终端中输入命令: | ||
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``` | ||
df -h | ||
``` | ||
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成功挂载SD卡之后,在终端中显示,如图: | ||
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![](LIMO_emmc2sd_image/sd_1.png) | ||
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#### 2、对系统进行拷贝 | ||
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(1)下载脚本jetsonhacks/bootFormUSB | ||
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打开终端,在终端中输入: | ||
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``` | ||
git clone https://github.com/jetsonhacks/bootFromUSB | ||
``` | ||
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(2)进入 bootFromUSB 目录执行操作 | ||
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在终端中输入命令: | ||
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``` | ||
cd bootFromUSB | ||
``` | ||
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执行脚本: | ||
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``` | ||
./copyRooToUSB.sh -p /dev/mvmeon1p1/ | ||
``` | ||
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注意:如果提示脚本没有执行权限,需要在终端输入命令赋予脚本权限: | ||
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``` | ||
chmod +x copyRootToUSB.sh | ||
``` | ||
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#### 3、修改启动顺序 | ||
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在终端中输入命令: | ||
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``` | ||
cd /boot/extlinux/ | ||
``` | ||
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备份一下当前的配置 | ||
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``` | ||
sudo cp extlinux.conf bak_extlinux.conf | ||
``` | ||
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修改extlinux.conf | ||
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``` | ||
sudo gedit extlinux.conf | ||
``` | ||
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修改后的extlinux.conf,如图: | ||
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![](LIMO_emmc2sd_image/sd_2.png) | ||
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修改内容: | ||
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将/dev/mmcblk0p1,改为/dev/mmcblk1p14(从/dev/mmcblk1p14启动系统) | ||
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将primary,改为primary1(避免从emmc启动系统) | ||
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保存文件,重启系统之后,打开终端,在终端中输入命令: | ||
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``` | ||
df -h | ||
``` | ||
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![](LIMO_emmc2sd_image/sd_3.png) | ||
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### 二、使用我司的镜像,从SD卡启动系统 | ||
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### 1、烧录镜像 | ||
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##### 1.1 下载安装balenaetcher | ||
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在个人PC电脑上下载安装balenaetcher,下载链接:https://www.balena.io/etcher/,根据个人电脑的操作系统和架构下载不同的版本。 | ||
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##### 1.2 下载需要烧录的镜像 | ||
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使用百度云盘下载镜像,下载链接为: 链接: https://pan.baidu.com/s/1HH-IxG1fqdlgpnCBCZRbwg ,提取码: o8jh | ||
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##### 1.3 软件使用说明 | ||
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软件使用说明以在Linux系统下为例子。 | ||
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(1)打开软件,选择需要烧录的镜像 | ||
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![](LIMO_emmc2sd_image/balena_1.png) | ||
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![](LIMO_emmc2sd_image/balena_2.png) | ||
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(2)选择需要进行烧录的SD卡 | ||
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![](LIMO_emmc2sd_image/balena_4.png) | ||
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(3)点击Flash,开始烧录 | ||
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![](LIMO_emmc2sd_image/balena_6.png) | ||
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#### 2、修改启动顺序 | ||
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插入SD卡,并查看SD卡是否正确挂载,打开终端,在终端中输入: | ||
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``` | ||
df -h | ||
``` | ||
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![](LIMO_emmc2sd_image/sd_1.png) | ||
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在终端中输入命令: | ||
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``` | ||
cd /boot/extlinux/ | ||
``` | ||
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备份一下当前的配置 | ||
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``` | ||
sudo cp extlinux.conf bak_extlinux.conf | ||
``` | ||
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修改extlinux.conf | ||
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``` | ||
sudo gedit extlinux.conf | ||
``` | ||
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修改后的extlinux.conf,如图: | ||
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![](LIMO_emmc2sd_image/sd_2.png) | ||
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保存文件,重启系统之后,打开终端,在终端中输入命令: | ||
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``` | ||
df -h | ||
``` | ||
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![](LIMO_emmc2sd_image/sd_3.png) | ||
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