STM32HAL库-F4-针对芯片内部FLASH读保护实现防篡改、破解功能（详解）

概述

本篇文章介绍如何使用STM32HAL库，针对芯片读写保护实现防篡改、破解功能（详解），本案例还包含内部FLASH读写数据，本质就是操作Flash。

硬件：STM32F401CEU6最小系统板（内部Flash : 512Kbytes，SARM : 96 Kbytes）

软件：Keil 5.29 + STM32CubeMX6.8.0

一、使用方法

通过参阅《STM32中文参考手册》得知，不同型号的芯片对应FLASH大小不一样。

Flash地址映射表：

想更详细的了解，请阅读《STM32中文参考手册》，自行上网查找资料下载。

二、STM32CubeMx配置

三、Examples

1. 打开STM32CubeMx生成的keil工程，新建bsp文件夹，同时分别新建bsp_flash.c与bsp_flash.h文件，并把这两个文件，添加keil工程中来即可。

2. 添加头文件路径

3. bsp_flash.h文件

#ifndef __BSP_FLASH_H
#define __BSP_FLASH_H

#ifdef __cplusplus
extern "C" {
#endif



/* Includes ------------------------------------------------------------------*/
#include "stm32f4xx_hal.h"
    


#define  DATASTOREADDR     0x08008000//数据存放地址    

typedef enum {
    FALSE = 0,
    TRUE,
}bool;

typedef enum {
    PS_DISABLE = 0,
    PS_ENABLE,
}Protection_Status;

typedef enum {
    APPLICATION_NORMAL = 0,        // APP能正常稳定运行
    APPLICATION_UPDATED,            // APP刚更新完成，等待测试启动
    APPLICATION_ERROR,                // APP错误，不能正常工作
}Application_Status_t;

typedef    __PACKED_STRUCT{
    uint32_t Device_id;                                // 设备号
    uint32_t Hardware_Version;                // 硬件版本信息
    uint32_t Application_Version;          // APP软件版本
    uint32_t Application_Status;          // APP的状态. @Application_Status_t
    uint32_t SystemParamCRC;
}SystemParamTypeDef;

/* Exported types ------------------------------------------------------------*/
/* Exported constants --------------------------------------------------------*/
/* Base address of the Flash sectors */
#define ADDR_FLASH_SECTOR_0     ((uint32_t)0x08000000) /* Base @ of Sector 0, 16 Kbyte */
#define ADDR_FLASH_SECTOR_1     ((uint32_t)0x08004000) /* Base @ of Sector 1, 16 Kbyte */
#define ADDR_FLASH_SECTOR_2     ((uint32_t)0x08008000) /* Base @ of Sector 2, 16 Kbyte */
#define ADDR_FLASH_SECTOR_3     ((uint32_t)0x0800C000) /* Base @ of Sector 3, 16 Kbyte */
#define ADDR_FLASH_SECTOR_4     ((uint32_t)0x08010000) /* Base @ of Sector 4, 64 Kbyte */
#define ADDR_FLASH_SECTOR_5     ((uint32_t)0x08020000) /* Base @ of Sector 5, 128 Kbyte */
#define ADDR_FLASH_SECTOR_6     ((uint32_t)0x08040000) /* Base @ of Sector 6, 128 Kbyte */
#define ADDR_FLASH_SECTOR_7     ((uint32_t)0x08060000) /* Base @ of Sector 7, 128 Kbyte */

/* Error code */
enum 
{
  FLASHIF_OK = 0,
  FLASHIF_ERASEKO,
  FLASHIF_WRITINGCTRL_ERROR,
  FLASHIF_WRITING_ERROR,
};
  
enum{
  FLASHIF_PROTECTION_NONE         = 0,
  FLASHIF_PROTECTION_PCROPENABLED = 0x1,
  FLASHIF_PROTECTION_WRPENABLED   = 0x2,
  FLASHIF_PROTECTION_RDPENABLED   = 0x4,
};

/* End of the Flash address */
#define APPLICATION_ADDRESS                   (uint32_t)0x08010000
#define USER_FLASH_END_ADDRESS        0x0807FFFF
/* Define the user application size */

/* Define the address from where user application will be loaded.
   Note: the 1st sector 0x08000000-0x08003FFF is reserved for the IAP code */


/* Define bitmap representing user flash area that could be write protected (check restricted to pages 8-39). */
#define FLASH_SECTOR_TO_BE_PROTECTED (OB_WRP_SECTOR_0 | OB_WRP_SECTOR_1 | OB_WRP_SECTOR_2 | OB_WRP_SECTOR_3 |\
                                      OB_WRP_SECTOR_4 | OB_WRP_SECTOR_5 | OB_WRP_SECTOR_6 | OB_WRP_SECTOR_7 )

/* Exported macro ------------------------------------------------------------*/
/* Exported functions ------------------------------------------------------- */
void              FLASH_If_Init(void);
uint32_t          FLASH_If_Erase(uint32_t StartSector);
uint32_t          FLASH_If_Write(uint32_t FlashAddress, uint32_t* Data, uint32_t DataLength);
uint32_t          FLASH_If_Write_ex(uint32_t FlashAddress, uint32_t* Data, uint32_t DataLength);
uint32_t                     FLASH_If_WriteByte(uint32_t FlashAddress, uint8_t* Data ,uint3