update stm32wl_guide document
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| Revision | Date | Description |
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| -------- | --------- | ----------- |
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| 1.0 | 2020-7-28 | 文档初版 |
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|1.1|2020-9-6|添加芯片解锁章节|
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## 1. 定制开发板EVB_WL硬件简介
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>如果出现无法下载问题,则芯片处于写保护状态,请查看本文第 4 小节的内容,去除写保护。
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#### 查看运行结果
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连接好串口,在PC的串口助手中可以看到TencentOS Tiny EVB_WL开发板打印LoRa业务运行的相关日志,如下图所示:
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# 4. 去除芯片写保护
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### 4.1. 使用ST-Link连接开发板
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确保ST-Link与开发板正常连接,并且在 MDK 中可以正常读取到信息,如图:
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## 4.2. 使用STM32CubeProg解锁
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关闭MDK,打开STM32CubeProg软件,点击右上角的 Connect,连接成功后显示Connected:
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点击选择 OB 图标按钮,按照图中流程进行解锁:
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成功之后点击 dicconnnect 断开连接:
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芯片解锁成功,此时即可使用MDK正常下载。
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写在结尾的话:感谢大家使用TencentOS Tiny,本文难免有描述不清晰的地方,如果有任何问题,欢迎加入TencentOS Tiny 的官网QQ技术群进行交流,基于TencentOS Tiny相关的项目合作请邮件联系 supowang@tencent.com
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