..\OBJ\Project.axf: Error: L6218E: Undefined symbol EXTI_ClearITPendingBit (referred from exti.o).

根据提供的引用内容，报错信息是"..\OBJ\Project.axf: Error: L6218E: Undefined symbol EXTI_ClearITPendingBit (referred from exti.o)"，提示找不到EXTI_ClearITPendingBit函数。解决方法是需要在代码中添加对应的头文件，并确保该函数参与编译。

以下是一个示例代码，演示如何解决该问题：

#include "stm32f10x_exti.h" // 添加对应的头文件

// 其他代码...

void EXTI_ClearITPendingBit(uint32_t EXTI_Line) // 添加函数的定义
{
    // 函数的具体实现...
}

// 其他代码...

请注意，示例代码中的"stm32f10x_exti.h"是一个示例头文件，你需要根据你的具体情况添加正确的头文件。

相关问题

..\OBJ\TIMER.axf: Error: L6218E: Undefined symbol EXTI_ClearITPendingBit (referred from exti.o).

这个错误提示表明，在链接时找不到 `EXTI_ClearITPendingBit` 函数的定义。通常这是由于以下原因之一：

1. 忘记包含头文件 `stm32f4xx_exti.h`，其中定义了 `EXTI_ClearITPendingBit` 函数。

2. 忘记在代码中实现 `EXTI_ClearITPendingBit` 函数，或者实现的函数签名与头文件中的不一致。

3. 编译器没有找到 `EXTI_ClearITPendingBit` 函数的实现文件，可能是因为实现文件没有被包含在编译中。

你可以检查以上原因，尝试解决问题。

..\OBJ\PWM.axf: Error: L6218E: Undefined symbol EXTI_ClearITPendingBit (referred from exti.o).

This error message is indicating that the linker was unable to find a definition for the symbol "EXTI_ClearITPendingBit", which is being referred to in the "exti.o" object file. This symbol is most likely a function or variable that is defined in another source file, but has not been included in the build process.

To resolve this issue, you will need to ensure that the source file containing the definition for "EXTI_ClearITPendingBit" is included in your build process. This may require adding additional source files to your project or modifying your build settings to include the necessary files. Alternatively, you may need to check that the function or variable is properly declared and defined in the source file where it is used.