Lts v3.1.x

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Summary of this Pull Request (PR) 拉取请求的简述

• 同步 example
• 同步 component

Intent for your PR 拉取请求的目的

Choose one (Mandatory): 必须选择一项

• This PR is for a code-review and is intended to get feedback 本拉取请求是一个草稿版本
• This PR is mature, and ready to be integrated into the repo 本拉取请求是一个成熟版本

Reviewers (Mandatory): 代码审阅者（必须指定）

@BernardXiong

Code Quality： 代码质量

As part of this pull request, I've considered the following:
我在这个拉取请求中考虑了：

• Style guide is adhered to, including spacing, naming and other style 代码的格式正确
• All redundant code is removed and cleaned up 没有垃圾代码
• All modifications are justified 所有变更均有原因
• I've commented appropriately where code is tricky 难懂代码均被注释
• Code in this PR is of high quality 本拉取请求高质量

Testing：代码测试

I've tested the code using the following test programs (provide list here):
我已经在如下用例上跑过测试：

• qemu bsp