ST公司的英文注释真坑爹

#if !defined (STM32F10X_LD) && !defined (STM32F10X_LD_VL) && !defined (STM32F10X_MD) && !defined (STM32F10X_MD_VL) && !defined (STM32F10X_HD) && !defined (STM32F10X_HD_VL) && !defined (STM32F10X_XL) && !defined (STM32F10X_CL) 

  /* #define STM32F10X_LD */     /*!< STM32F10X_LD: STM32 Low density devices */

  /* #define STM32F10X_LD_VL */  /*!< STM32F10X_LD_VL: STM32 Low density Value Line devices */  

  /* #define STM32F10X_MD */     /*!< STM32F10X_MD: STM32 Medium density devices */

  /* #define STM32F10X_MD_VL */  /*!< STM32F10X_MD_VL: STM32 Medium density Value Line devices */  

  /* #define STM32F10X_HD */     /*!< STM32F10X_HD: STM32 High density devices */

  /* #define STM32F10X_HD_VL */  /*!< STM32F10X_HD_VL: STM32 High density value line devices */  

  /* #define STM32F10X_XL */     /*!< STM32F10X_XL: STM32 XL-density devices */

  /* #define STM32F10X_CL */     /*!< STM32F10X_CL: STM32 Connectivity line devices */

#endif

/*  Tip: To avoid modifying this file each time you need to switch between these

        devices, you can define the device in your toolchain compiler preprocessor.



 - Low-density devices are STM32F101xx, STM32F102xx and STM32F103xx microcontrollers

   where the Flash memory density ranges between 16 and 32 Kbytes.

 - Low-density value line devices are STM32F100xx microcontrollers where the Flash

   memory density ranges between 16 and 32 Kbytes.

 - Medium-density devices are STM32F101xx, STM32F102xx and STM32F103xx microcontrollers

   where the Flash memory density ranges between 64 and 128 Kbytes.

 - Medium-density value line devices are STM32F100xx microcontrollers where the 

   Flash memory density ranges between 64 and 128 Kbytes.   

 - High-density devices are STM32F101xx and STM32F103xx microcontrollers where

   the Flash memory density ranges between 256 and 512 Kbytes.

 - High-density value line devices are STM32F100xx microcontrollers where the 

   Flash memory density ranges between 256 and 512 Kbytes.   

 - XL-density devices are STM32F101xx and STM32F103xx microcontrollers where

   the Flash memory density ranges between 512 and 1024 Kbytes.

 - Connectivity line devices are STM32F105xx and STM32F107xx microcontrollers.

  */