基于android2.2的fota功能。 升 级 整 个 流 程 概 述 : 从 用 户 点 击 APK , 然 后 上 层 将 命 令 写 入

recovery/command,然后 kernel 检测到信号重启,将开机原因写入共享内存,

开机进入 appboot 检测到 arm9 传递过来的开机原因,然后进入 recovery 模式,

执行 sbin/recovery。进入 install_package 函数,然后建立管道执行升级包解

析出来的脚本, cache 分区进行比较解析。

在

升级完毕重启,

写入 FLAG。 Oemsbl

在

阶段检测到 FLAG 会对 MODEM 端 IMG 进行升级,升级完毕后重置 FLAG。然后重启

后正常开机,整个升级过程完毕

-Upgrade the entire process Overview: APK, then the user clicks on the upper command will write

recovery/command, and then the kernel detected signal to restart write boot reasons to shared memory,

Boot to enter appboot is detected the arm9 pass over the boot reasons, and then into recovery mode,

Execution sbin/recovery. Into install_package function, and then build the pipeline to perform the upgrade package solution

Analysis of the scr ipt, the cache partition comparison resolve.

In

The upgrade is complete restart,

Write the FLAG. Oemsbl

In

Stage detected FLAG will MODEM side IMG upgrade after upgrade reset the FLAG. And then restart

After the normal boot, the entire upgrade process is completed