STM8L151的IAR工程编译报错Fatal Error[Pe035]: #error directive: “Please select first the target STM8L...

项目场景：

STM8L151G4XX单片机IAR工程编译报错.

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问题描述

编译报错：Fatal Error[Pe035]: #error directive: “Please select first the target STM8L device used in your application (in stm8l15x.h file)”
这里的描述大概意思就是没有选择单片机型号分类，我们需要根据提示去设置。
打开 stm8l15x.h，我们可以看到以下代码：

#if !defined (STM8L15X_MD) && !defined (STM8L15X_MDP) && !defined (STM8L15X_HD) && !defined (STM8L15X_LD) \
&& !defined (STM8L05X_LD_VL) && !defined (STM8L05X_MD_VL) && !defined (STM8L05X_HD_VL) && !defined (STM8AL31_L_MD)
 #error "Please select first the target STM8L device used in your application (in stm8l15x.h file)"
#endif

这一部分就是为什么会报错的原因：没有进行相关宏定义
怎么去解决，在这个文件也有描述，需要根据单片机型号选择不同的宏定义

/* Uncomment the line below according to the target STM8L15x device used in your
   application
  */
/* #define STM8L15X_LD */     /*!< STM8L15X_LD: STM8L15x Low density devices */
/* #define STM8L15X_MD */     /*!< STM8L15X_MD: STM8L15x Medium density devices */
/* #define STM8L15X_MDP */    /*!< STM8L15X_MDP: STM8L15x Medium density plus devices */
/* #define STM8L15X_HD */     /*!< STM8L15X_HD: STM8L15x/16x High density devices */
/* #define STM8L05X_LD_VL */  /*!< STM8L05X_LD_VL: STM8L051xx3 Low density value line devices */
/* #define STM8L05X_MD_VL */  /*!< STM8L05X_MD_VL: STM8L052xx6 Medium density value line devices */
/* #define STM8L05X_HD_VL */  /*!< STM8L05X_HD_VL: STM8L052xx8 High density value line devices */
/* #define STM8AL31_L_MD */   /*!< STM8AL31_L_MD: STM8AL3x Medium density devices */


/*  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 STM8L15x devices are STM8L151C3, STM8L151K3, STM8L151G3, STM8L151F3,
   STM8L151C2, STM8L151K2, STM8L151G2 and STM8L151F2 microcontrollers where the 
   Flash memory density ranges between 4 and 8 Kbytes.
 - Medium density STM8L15x devices are STM8L151C4, STM8L151C6, STM8L152C4,
   STM8L152C6, STM8L151K4, STM8L151K6, STM8L152K4, STM8L152K6, STM8L151G4,
   STM8L151G6, STM8L152G4 and STM8L152G6 microcontrollers where the Flash memory
   density ranges between 16 and 32 Kbytes.
 - Medium density Plus devices are STM8L151R6, STM8L152R6 microcontrollers where
  the Flash memory density is fixed and equal to 32 Kbytes and a wider range of
  peripheral than the medium density devices.
 - High density STM8L15x devices are STM8L151x8, STM8L152x8, STM8L162R8 and STM8L162M8
   microcontrollers where the Flash memory density is fixed and equal to 64 Kbytes with 
   the same peripheral set than Medium Density Plus devices.
 - Value line low density STM8L05xx devices are STM8L051x3 microcontrollers
   with 8-KB Flash
 - Value line medium density STM8L05xx devices are STM8L052x6 microcontrollers 
   with 32-KB Flash
 - Value line high density STM8L05xx devices: STM8L052x8 microcontrollers
   with 64-KB Flash
 - Medium density STM8AL31xx/STM8AL3Lxx devices: STM8AL3168, STM8AL3166, 
   STM8AL3148,STM8AL3146, STM8AL3138, STM8AL3136, STM8AL3L68, STM8AL3L66, 
   STM8AL3L48, STM8AL3L46 microcontrollers with 8-KB, 16-KB or 32-KB Flash
 */

解决方案：

方法一：
直接在 stm8l15x.h文件修改，删掉需要的宏定义的注释符号，以STM8L151G4XX为例，根据上面描述，该型号属于 Medium density 。

/* Uncomment the line below according to the target STM8L15x device used in your
   application
  */
/* #define STM8L15X_LD */     /*!< STM8L15X_LD: STM8L15x Low density devices */
 #define STM8L15X_MD   		/*!< STM8L15X_MD: STM8L15x Medium density devices */
/* #define STM8L15X_MDP */    /*!< STM8L15X_MDP: STM8L15x Medium density plus devices */
/* #define STM8L15X_HD */     /*!< STM8L15X_HD: STM8L15x/16x High density devices */
/* #define STM8L05X_LD_VL */  /*!< STM8L05X_LD_VL: STM8L051xx3 Low density value line devices */
/* #define STM8L05X_MD_VL */  /*!< STM8L05X_MD_VL: STM8L052xx6 Medium density value line devices */
/* #define STM8L05X_HD_VL */  /*!< STM8L05X_HD_VL: STM8L052xx8 High density value line devices */
/* #define STM8AL31_L_MD */   /*!< STM8AL31_L_MD: STM8AL3x Medium density devices */

方法二：
设置路径Options->C/C++ Compiler->Preprocessor-Defined symbols