======
Source Code from
https://pan.baidu.com/s/1ldI06aZYT1E2BrBoba7Dqg 提取码
编译环境 2021.1.14
参考
OKMX8MM-C（Android）用户资料-20200302\原厂资料\Android_User’s_Guide.pdf
OKMX8MM-C（Android）用户资料-20200302\原厂资料\Android_Quick_Start_Guide.pdf
OKMX8MM-C（Android）用户资料-20200302\手册\OKMX8MM-C_Android_用户手册_V1.1_2020.03.02.pdf
Ubuntu 环境
官方文档要求 Ubuntu 16.04 X64
$ sudo add-apt-repository ppa:openjdk-r/ppa
$ sudo apt-get update
$ sudo apt-get install uuid \
uuid-dev \
zlib1g-dev \
liblz-dev \
liblzo2-2 \
liblzo2-dev \
lzop \
git-core curl \
u-boot-tools \
mtd-utils \
android-tools-fsutils \
openjdk-8-jdk \
device-tree-compiler \
gdisk \
m4 \
libz-dev
jdk 要求是1.8版本
解压源码
$ cd /home/forlinx/imx8mm/
$cat OK8MM-android-source.tar.bz2_a* > OK8MM-android-source.tar.bz2
$ tar -xvf OK8MM-android-source.tar.bz2
自定义docker环境
按照Ubuntu 环境，自定义docker环境，并且支持ssh 登录docker 容器中的ubuntu
已经上传到docker.io
下载
docker pull quectel/imx8_android9:latest
用户名 imx8 密码 quectel123
编译Android
运行docker 环境
android@q-OptiPlex-7070:~$ docker run -d --name imx8 -v /home/android/IMX8_Android9:/home/imx8/imx8_Android -v /etc/localtime:/etc/localtime:ro -v
/etc/timezone:/etc/timezone:ro --device=/dev/loop-control:/dev/loop-control --device=/dev/loop0:/dev/loop0 --cap-add SYS_ADMIN -p 6666:22 --privil
eged ubuntu:16_jdk1.8 /usr/sbin/sshd -D
57c2bf9c7ccefaa4701f006c420d3d5ededfdf3f0ea0b0655772d42c21b566e7
android@q-OptiPlex-7070:~$
android@q-OptiPlex-7070:~$
android@q-OptiPlex-7070:~$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
57c2bf9c7cce ubuntu:16_jdk1.8 "/usr/sbin/sshd -D" 6 seconds ago Up 3 seconds 0.0.0.0:6666->22/tcp imx8
android@q-OptiPlex-7070:~$ ls
模板 camdroid IMX8_Android9 Khadas Tiny4412_android5.1 v3s_camdroid.zip
SSH远程连接到
ssh -P 6666 ${HOST_IP}
PS D:\BaiduNetdiskDownload\imx8-android> ssh -p 6666 imx8@10.66.83.84
The authenticity of host '[10.66.83.84]:6666 ([10.66.83.84]:6666)' can't be established.
ECDSA key fingerprint is SHA256:vhkbWtZEDaEjXzh6phneA4VSDB3hLSZdvOr8ZD/zYvw.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '[10.66.83.84]:6666' (ECDSA) to the list of known hosts.
imx8@10.66.83.84's password:
Welcome to Ubuntu 16.04.7 LTS (GNU/Linux 5.4.0-58-generic x86_64)
在docker容器中编译
$ cd /home/imx8/imx8_Android/OK8MM-android-source
$ source build/envsetup.sh
$ lunch evk_8mm-userdebug
$ make -j8
Notes
export JAVA_TOOL_OPTIONS=-Dfile.encoding=UTF8
内核驱动移植
vi out/target/product/evk_8mm/obj/KERNEL_OBJ/.config vendor/nxp-opensource/kernel_imx/arch/arm64/configs/android_defconfig -O
(或者vimdiff)
判断得知内核的配置文件是
OK8MM-android-source/vendor/nxp-opensource/kernel_imx/arch/arm64/configs/android_defconfig
从结果看，已经将Quectel模组的VID、PID加到option.c中，并且移植了GobiNet驱动和qmi_wwan驱动。使用 EC2X 模组没有问题。
qmi_wwan 已经 build-in 编译
RIL库移植
/vendor/lib/libreference-ril.so
/vendor/lib64/libreference-ril.so
device/fsl/imx8m/evk_8mm/evk_8mm.mk:52: device/fsl/imx8m/evk_8mm/lib/libreference-ril.so:$(TARGET_COPY_OUT_VENDOR)/lib64/libreference-ril.so
烧录
在Linux上烧录,用root账户，否则/tmp/目录没法写。
uuu_imx_android_flash.bat -f imx8mm -e -c 7
uuu.exe 放到环境变量路径中；管理员权限执行
分区表
| 分区索引 | 名称 | 偏移 | 大小 | 文件系统 | 内容 |
|---|---|---|---|---|---|
| NA | Bootloader | 33KB | 4MB | NA | bootloader |
| 1 | dtbo_a | 8MB | 4MB | NA | dtbo.img |
| 2 | dtbo_b | Follow dtbo_a | 4MB | NA | dtbo.img |
| 3 | boot_a | Follow dtbo_b | 48MB | boot.img(kernel+ramdisk) | boot.img |
| 4 | boot_b | Follow boot_a | 48MB | boot.img(kernel+ramdisk) | boot.img |
| 5 | system_a | Follow boot_b | 1536MB | ext4 挂载在 /system | Android系统文件/system目录 |
| 6 | system_b | Follow system_a | 1536MB | ext4 挂载在 /system | Android系统文件/system目录 |
| 7 | misc | Follow system_b | 4MB | NA | 为了恢复保存bootloader信息 |
| 8 | metadata | Follow misc | 2MB | NA | For system slide show |
| 9 | presistdata | Follow metadata | 1MB | NA | Option to operate unlock metadata |
| 10 | vendor_a | Follow presistdata | 256MB | ext4.挂载在/vendor | vendor.img |
| 11 | vendor_b | Follow vendor_a | 256MB | ext4.挂载在/vendor | vendor.img |
| 12 | userdata | Follow vendor_b | 剩余全部 | ext4.挂载在/data | 应用程序数据 |
| 13 | fbmisc | Follow userdata | 1MB | NA | 保存lock/unlock状态 |
| 14 | vbmeta_a | Follow fbmisc | 1MB | NA | 保存verify boot’s metadata |
| 15 | vbmeta_b | Follow vbmeta_a | 1MB | NA | 保存verify boot’s metadata |
fastboot
关闭 DM 验证
设置-》系统-》开发者选项-》OEM 解锁
在uboot阶段
fastboot 0
烧录vbmeta.img
fastboot oem unlock
fastboot --disable-verity flash vbmeta vbmeta.img
然后就可以直接用fastboot烧录了
fastboot flash system_a system.img
OTA
编译遇到的问题
[Q] error: unmappable character for encoding ASCII （java编译过程中出现的错误）
[A]
export JAVA_TOOL_OPTIONS=-Dfile.encoding=UTF8
[Q]Device is locked. Please unlock the device first
[A]开发者模式解锁
[Q]
[A]
Android FAQs
**[Q]客户移植RIL驱动，发现有两个rild
[A]**kill掉其中一个
[Q]hidl
[A]
[Q]Android 怎么改router，修改默认DNS
[A]
**[Q]**Android 怎么修改网卡的优先顺序
[A]
[Q] 海外的板子寄回国发现图标显示不对
[A] frameworks/base/services/core/java/com/android/server/connectivity/NetworkMonitor.java
// Default configuration values for captive portal detection probes.
// TODO: append a random length parameter to the default HTTPS url.
// TODO: randomize browser version ids in the default User-Agent String.
private static final String DEFAULT_HTTPS_URL = "https://www.google.com/generate_204";
private static final String DEFAULT_HTTP_URL =
"http://connectivitycheck.gstatic.com/generate_204";
private static final String DEFAULT_FALLBACK_URL = "http://www.google.com/gen_204";
private static final String DEFAULT_OTHER_FALLBACK_URLS =
"http://play.googleapis.com/generate_204";
private static final String DEFAULT_USER_AGENT = "Mozilla/5.0 (X11; Linux x86_64) "
+ "AppleWebKit/537.36 (KHTML, like Gecko) "
+ "Chrome/52.0.2743.82 Safari/537.36";
[Q] 以太网和4G网卡共存
[A]
— a/services/core/java/com/android/server/ConnectivityService.java
+++ b/services/core/java/com/android/server/ConnectivityService.java
@@ -4247,7 +4248,8 @@ public class ConnectivityService extends IConnectivityManager.Stub
loge(“Dead network still had at least “ + nr);
break;
}
- nai.asyncChannel.disconnect();
+ log(“don’t teardownUnneededNetwork “ + nai);
+ //nai.asyncChannel.disconnect();
}
private void handleLingerComplete(NetworkAgentInfo oldNetwork) {
[Q]
[A]
[Q]
[A]