STM32 头文件编译

只看该作者 · 2013-5-9 21:33

#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

#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)
#error "Please select first the target STM32F10x device used in your application (in stm32f10x.h file)"
#endif

这个宏编译不是指定了#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) 这么多条件，为什么我们只要定义一个就可以了，比如说定义STM32F10X_HD ，不是有好多个&&的关系吗？