Error[Pe235]: variable "_stdout" was declared with a never-completed type C:\Users\32061\Desktop\freertos\cs\Core\Src\usart.c 121

这个错误信息是指在文件"usart.c"的第121行，变量"_stdout"被声明为一个未完成的类型。这种错误通常发生在系统找不到所需的类型定义时，一般是由于头文件没有被正确包含。你可以检查一下是否正确包含了相关的头文件，或者确认是否将所需的自定义类型定义放在了正确的位置。如果确认头文件和类型定义都没有问题，你可以尝试将对应的C文件和头文件移出工程，再新建两个同名文件，将原内容复制进去，以解决这个问题。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* *3* [编译错误记录](https://blog.csdn.net/qq_30139269/article/details/86089879)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 50%"]
- *2* [Error: L6200E: Symbol __stdout multiply defined (by stdio_streams.o and usart.o).](https://blog.csdn.net/qq_45649126/article/details/116666484)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 50%"]
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