我的开发软件是Keil5 修改了宏定义为

#if !defined(CH32F20x_D6) && !defined(CH32F20x_D8) && !defined(CH32F20x_D8C) && !defined(CH32F20x_D8W)

//#define CH32F20x_D6                /* CH32F203K8-CH32F203C6-CH32F203C8 */

//#define CH32F20x_D8              /* CH32F203CB-CH32F203RB-CH32F203RC-CH32F203VC */

#define CH32F20x_D8C             /* CH32F207x-CH32F205x */

//#define CH32F20x_D8W             /* CH32F208x */

#endif

但是缺少对应的启动文件 CH32F20x_D8C.s 

您好，如下图，在EVT对应文件夹下有。