在Keil中使用HAL库时出现.\Objects\test.axf: Error: L6218E: Undefined symbol SystemInit (referred from start）等

在Keil中使用HAL库时出现.\Objects\test.axf: Error: L6218E: Undefined symbol SystemInit (referred from startup_stm32f107xc.o).等问题。

在上一篇中谈到使用stm32f107的HAL库，实践中出现以下问题：
.\Objects\test.axf: Error: L6218E: Undefined symbol SystemInit (referred from startup_stm32f107xc.o).
.\Objects\test.axf: Error: L6218E: Undefined symbol __UNALIGNED_UINT32_WRITE (referred from stm32f1xx_ll_usb.o).
.\Objects\test.axf: Error: L6218E: Undefined symbol __UNALIGNED_UINT32_READ (referred from stm32f1xx_ll_usb.o).
.\Objects\test.axf: Error: L6218E: Undefined symbol SystemCoreClock (referred from stm32f1xx_hal.o).
.\Objects\test.axf: Error: L6218E: Undefined symbol AHBPrescTable (referred from stm32f1xx_hal_rcc.o).
.\Objects\test.axf: Error: L6218E: Undefined symbol APBPrescTable (referred from stm32f1xx_hal_rcc.o).
.\Objects\test.axf: Error: L6218E: Undefined symbol __UNALIGNED_UINT32_READ (referred from stm32f1xx_ll_usb.o).

原因

问题是未定义一些东西，即使我去定义

void SystemInit()
{
}

仍然有些问题，后来发现是没有添加头文件stm32f107xc.h.

解决办法

目录：（你在官网上下载的STM32Cube_FW_F1_V1.8.0下的目录）\STM32Cube_FW_F1_V1.8.0\Drivers\CMSIS\Device\ST\STM32F1xx\Include
复制到你的工程文件下\KEIL files\Hal_test\STM32F1xx_HAL_Driver 下

至于下面的两个错误解决办法是c文件中添加定义

.\Objects\test.axf: Error: L6218E: Undefined symbol __UNALIGNED_UINT32_WRITE (referred from stm32f1xx_ll_usb.o).
.\Objects\test.axf: Error: L6218E: Undefined symbol __UNALIGNED_UINT32_READ (referred from stm32f1xx_ll_usb.o).

void __UNALIGNED_UINT32_READ(){}
void __UNALIGNED_UINT32_WRITE(){}

注：如遇到这种问题"Please select first the target STM32F1xx device used in your application (in stm32f1xx.h file)"

解决办法：就在stm32f1xx.h文件下取消你所用的mcu的注释就可以了，我用的是STM32F107VC,所以修改如图

这是我测试好的f107工程直接用link