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1> 概述

2> 下载链接

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帮助文档："stm32f4xx_dsp_stdperiph_lib_um.chm"编程时，可对库函数概览；

3> 文件简介

3.1> CPU文件

ARM公司为CPU编写的描述和操作代码： /* CMSIS Cortex-M4 Core Peripheral Access Layer Header File */"core_cm4.h"             /* CMSIS Cortex-M Core Instruction Access Header File  */                "core_cmInstr.h"   /* CMSIS Cortex-M Core Function Access Header File */         "core_cmFunc.h"         /* Compiler specific SIMD Intrinsics  */    "core_cmSimd.h"/* standard types definitions  */"stdint.h" //在安装目录下            

3.2> MCU文件

/* MCU启动文件 */"startup_stm32f40xx.s"/* 时钟初始化 */"system_stm32f4xx.h""system_stm32f4xx.c"/* CMSIS Cortex-M4 Device Peripheral Access Layer Header File. This file contains:> all the peripheral register's definitions, > bits definitions,> memory mapping */"stm32f4xx.h"/* 外设驱动文件 */"stm32f4xx_gpio.h""stm32f4xx_gpio.c""stm32f4xx_rcc.h""stm32f4xx_rcc.C"..."stm32f4xx_ppp.h""stm32f4xx_ppp.C"/* 配置外设驱动文件 */"stm32f4xx_conf.h"

3.3> 头文件包含关系

4> 标准库修改

4.1> 修改外部晶振

Step 1> stm32f4xx.h

/*修改HSE_VALUE 指定频率  */#if defined(STM32F40_41xxx)  || defined(STM32F427_437xx)  || \	defined(STM32F429_439xx) || defined(STM32F401xx)      || \    defined(STM32F410xx)     || defined(STM32F411xE)      || \    defined(STM32F469_479xx)     	#if !defined  (HSE_VALUE)  		 #define HSE_VALUE    ((uint32_t)8000000) /*!< Value of the External oscillator in Hz */ 	#endif /* HSE_VALUE */ 	#elif defined (STM32F412xG) || defined(STM32F413_423xx) || defined(STM32F446xx)	#if !defined  (HSE_VALUE)  		 #define HSE_VALUE    ((uint32_t)8000000) /*!< Value of the External oscillator in Hz */	#endif /* HSE_VALUE */ 	#endif

Step 2> system_stm32f4xx.c

/*修改PLL_M 为：指定频率/100000 */#if defined(STM32F40_41xxx)  || defined(STM32F427_437xx) || \	defined(STM32F429_439xx) || defined(STM32F401xx)     || \	defined(STM32F469_479xx)	 	/* PLL_VCO = (HSE_VALUE or HSI_VALUE / PLL_M) * PLL_N */ 	#define PLL_M      8 #elif defined(STM32F412xG) || defined(STM32F413_423xx) || defined (STM32F446xx) 	#define PLL_M      8 #elif defined (STM32F410xx) || defined (STM32F411xE)	#if defined(USE_HSE_BYPASS)  		#define PLL_M      8     	#else /* !USE_HSE_BYPASS */ 	 		#define PLL_M      16	#endif /* USE_HSE_BYPASS */#else	#endif 

Step 3> 调试仿真的时钟频率

4.2> 修改stm32f4xx_conf.h

"stm32f4xx_conf.h"/* 注释掉不需要的 *///#include "stm32f4xx_adc.h"//#include "stm32f4xx_crc.h"//#include "stm32f4xx_dbgmcu.h"//#include "stm32f4xx_dma.h"//#include "stm32f4xx_exti.h"//#include "stm32f4xx_flash.h"#include "stm32f4xx_gpio.h"

5> 标准库代码规范

5.1> 头文件

/**  ******************************************************************************  * @file      * @author    * @version   * @date      * @brief    *            ******************************************************************************  * @attention  *  ******************************************************************************  *//* Define to prevent recursive inclusion -------------------------------------*/#ifndef __TEMPLATE_H#define __TEMPLATE_H/* Includes ------------------------------------------------------------------*/#include "stm32f4xx.h"/* Exported types ------------------------------------------------------------*/"数据类型声明"例如typedef struct{     uint32_t GPIO_Pin;                GPIOMode_TypeDef GPIO_Mode;       GPIOSpeed_TypeDef GPIO_Speed;     GPIOOType_TypeDef GPIO_OType;     GPIOPuPd_TypeDef GPIO_PuPd;    }GPIO_InitTypeDef;/* Exported constants --------------------------------------------------------*/"常量定义"/* Exported macro ------------------------------------------------------------*/"宏函数"例如：#define MAX(a, b) ((a) > (b) ? (a) : (b))/* Exported functions --------------------------------------------------------*/ #endif /* __TEMPLATE_H *//************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

5.2> C文件

/**  ******************************************************************************  * @file      * @author    * @version   * @date      * @brief    *            ******************************************************************************  * @attention  *  ******************************************************************************  *//* Includes ------------------------------------------------------------------*/#include "template.h"/* Private typedef -----------------------------------------------------------*//* Private define ------------------------------------------------------------*//* Private macro -------------------------------------------------------------*//* Private variables ---------------------------------------------------------*//* Private function prototypes -----------------------------------------------*//* Private functions ---------------------------------------------------------*//************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/