该错误出现的原因是因为stm32f10x_conf.h配置文件注释掉了一些头文件。把注释去掉就好啦！！！
/* Includes ------------------------------------------------------------------*/
/* Uncomment/Comment the line below to enable/disable peripheral header file inclusion */
//#include "stm32f10x_adc.h"
//#include "stm32f10x_bkp.h"
//#include "stm32f10x_can.h"
//#include "stm32f10x_cec.h"
//#include "stm32f10x_crc.h"
//#include "stm32f10x_dac.h"
//#include "stm32f10x_dbgmcu.h"
#include "stm32f10x_dma.h"
#include "stm32f10x_exti.h"
//#include "stm32f10x_flash.h"
#include "stm32f10x_fsmc.h"
#include "stm32f10x_gpio.h"
//#include "stm32f10x_i2c.h"
//#include "stm32f10x_iwdg.h"
//#include "stm32f10x_pwr.h"
#include "stm32f10x_rcc.h"
//#include "stm32f10x_rtc.h"
#include "stm32f10x_sdio.h"
#include "stm32f10x_spi.h"
#include "stm32f10x_tim.h"
#include "stm32f10x_usart.h"
//#include "stm32f10x_wwdg.h"
#include "misc.h" /* High level functions for NVIC and SysTick (add-on to CMSIS functions) */
..\SYSTEM\exti\bsp_exti.c(55): error: #20: identifier "EXTI_InitTypeDef" is undefined
原文：https://www.cnblogs.com/luxingsh/p/12829395.html