STM32G070xx将Flash页分块方式存储，固定数据块存储，实现一次擦除多次写入

参考例程

• STM32G0xx使用LL库将Flash页分块方式存储数据实现一次擦除可多次写入
• STM32G030Cx HAL库Flash擦除或编程操作出错的解决办法
• STM32G0xx HAL和LL库Flash读写擦除操作

---

例程说明

• 本例程使用STM32G070xx芯片，Flash大小128KB。第125~126KB为操作存储区，地址0x0801F000 ~ 0x0801F7FF每块32字节；第127~128KB为标定存储区，地址0x0801F800 ~ 0x0801FFFF每块128字节
• Flash每页(2048字节)写满后再擦除。操作存储区分为64块,每块32字节,即写满64次擦除一次；标定存储区分为16块，每块128字节，即写满16次擦除一次
• 每块读写都有校验。读取时校验不通过表示数据异常，往前继续读取数据，直到校验通过为止
• 在写入Flash前。数据前后对比，只有数据发生变化才写入Flash中
• 每个存储区的块都有各自的头部标记

---

一、存储区数据结构

#define FLASH_STORE_OPERAT_PARM_PAGE                         (125)
#define FLASH_STORE_OPERAT_PARM_START_ADDRE                  (0x0801F000UL)
#define FLASH_STORE_OPERAT_PARM_HEADER_TAG                   (0x2A3D)
#define FLASH_STORE_OPERAT_PARM_BLOCK_SIZE                   (32)
#define FLASH_STORE_OPERAT_PARM_BLOCK_COUNT                  (u16)(FLASH_PAGE_SIZE / FLASH_STORE_OPERAT_PARM_BLOCK_SIZE) //64#define FLASH_STORE_DEMAR_PARM_PAGE                          (127)
#define FLASH_STORE_DEMAR_PARM_START_ADDRE                   (0x0801F800UL)
#define FLASH_STORE_DEMAR_PARM_HEADER_TAG                    (0x6C5A)
#define FLASH_STORE_DEMAR_PARM_BLOCK_SIZE                    (128)
#define FLASH_STORE_DEMAR_PARM_BLOCK_COUNT                   (u16)(FLASH_PAGE_SIZE / FLASH_STORE_DEMAR_PARM_BLOCK_SIZE) //16#pragma pack(1)typedef struct
{u16 HeaderTag;  /* 头部标记 */u16 StoreIndex; /* 存储索引 */
}FlashStoreHeader, * FlashStoreHeader_t;typedef struct
{FlashStoreHeader  Header;............ /* 用户定义数据1 */ ............ /* 用户定义数据2 */ u8 ubRes[23]; /* 块大小对齐 */u8 ubCRC8;    /* 校验和 */
}DemarParam_TypeDef, * DemarParam_TypeDef_t;typedef struct
{FlashStoreHeader  Header;............ /* 用户定义数据1 */ ............ /* 用户定义数据2 */ u8 ubRes[9]; /* 块大小对齐 */u8 ubCRC8;   /* 校验和 */
}OperatParam_TypeDef, * OperatParam_TypeDef_t;typedef struct
{OperatParam_TypeDef Operat; /* 操作存储区 共32字节 */DemarParam_TypeDef  Demar;  /* 标定存储区 共128字节 */
}SystemParamStore_TypeDef, * SystemParamStore_TypeDef_t;#pragma pack()static SystemParamStore_TypeDef SystemStoreParam = {0};
DemarParam_TypeDef  * pStoreSysDemar  = &SystemStoreParam.Demar;
OperatParam_TypeDef * pStoreSysOperat = &SystemStoreParam.Operat;

二、读取存储区数据

static u16 usGet_Flash_Read_Index(u16 page)
{u32 startAddr  = FLASH_STORE_DEMAR_PARM_START_ADDRE;u16 blackSize  = FLASH_STORE_DEMAR_PARM_BLOCK_SIZE;u16 headerTag  = FLASH_STORE_DEMAR_PARM_HEADER_TAG;u8  blackCount = FLASH_STORE_DEMAR_PARM_BLOCK_COUNT;u8  len = XOFS(DemarParam_TypeDef , ubCRC8);u16 dat = 0, i = 0;u8  crc = 0;if (page == FLASH_STORE_OPERAT_PARM_PAGE){startAddr  = FLASH_STORE_OPERAT_PARM_START_ADDRE;blackSize  = FLASH_STORE_OPERAT_PARM_BLOCK_SIZE;headerTag  = FLASH_STORE_OPERAT_PARM_HEADER_TAG;blackCount = FLASH_STORE_OPERAT_PARM_BLOCK_COUNT;len = XOFS(OperatParam_TypeDef , ubCRC8);}#if defined(DEBUG_RELEASE_VERSION_ENABLE) && (DEBUG_RELEASE_VERSION_ENABLE == 0)dprintf("R-startAddr:%X blackSize:%u headerTag:%X  blackCount:%u  len:%u\r\n", startAddr, blackSize, headerTag, blackCount, len);#endiffor (i = 0; i < blackCount; ++i){dat = *(volatile u16 *)(startAddr + ((blackCount - 1 - i) * blackSize));if (dat == headerTag){crc = ubCheckSum_CRC8((void *)(startAddr + ((blackCount - 1 - i) * blackSize)), len);dat = *(volatile u8 *)(startAddr + ((blackCount - 1 - i) * blackSize) + (blackSize - 1));if (dat == crc){return (blackCount - 1 - i);}}}return FLASH_STORE_OPERAT_PARM_BLOCK_COUNT;
}static void vFixed_Operat_Value(void)
{SystemStoreParam.Operat.Header.HeaderTag = FLASH_STORE_OPERAT_PARM_HEADER_TAG;
}static void vRestore_Operat_Parameter()
{memset((void *)(&SystemStoreParam.Operat), 0, sizeof(OperatParam_TypeDef));vFixed_Operat_Value();
}static void vRead_Operat_Parameter(void)
{u16 index = usGet_Flash_Read_Index(FLASH_STORE_OPERAT_PARM_PAGE);if (index < FLASH_STORE_OPERAT_PARM_BLOCK_COUNT){vFlash_Read_DoubleWord(FLASH_STORE_OPERAT_PARM_START_ADDRE + (FLASH_STORE_OPERAT_PARM_BLOCK_SIZE * index), (u64 *)(&SystemStoreParam.Operat), (FLASH_STORE_OPERAT_PARM_BLOCK_SIZE >> 3));vFixed_Operat_Value();#if defined(DEBUG_RELEASE_VERSION_ENABLE) && (DEBUG_RELEASE_VERSION_ENABLE == 0)dprintf("Read Operat Param OK...%u\r\n", SystemStoreParam.Operat.Header.StoreIndex);#endif}else{vRestore_Operat_Parameter();#if defined(DEBUG_RELEASE_VERSION_ENABLE) && (DEBUG_RELEASE_VERSION_ENABLE == 0)dprintf("Restore Operat Param...%u\r\n", SystemStoreParam.Operat.Header.StoreIndex);#endif}#if 1dprintf("--------------------- Operat Param Info ---------------------\r\n");dprintf("            00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F  \r\n");dprintf("-------------------------------------------------------------\r\n");for (index = 0; index < FLASH_STORE_OPERAT_PARM_BLOCK_SIZE; ++index){if (index && (index % 16 == 0)) dprintf("\r\n");if (index % 16 == 0) dprintf("0x%08X  ", (FLASH_STORE_OPERAT_PARM_START_ADDRE + (FLASH_STORE_OPERAT_PARM_BLOCK_SIZE * SystemStoreParam.Operat.Header.StoreIndex) + index));dprintf("%02X ", *(volatile u8 *)(FLASH_STORE_OPERAT_PARM_START_ADDRE + (FLASH_STORE_OPERAT_PARM_BLOCK_SIZE * SystemStoreParam.Operat.Header.StoreIndex) + index));}dprintf("\r\n");dprintf("-------------------------------------------------------------\r\n");dprintf("\r\n\r\n");#endif
}static void vFixed_Demar_Value(void)
{SystemStoreParam.Demar.Header.HeaderTag = FLASH_STORE_DEMAR_PARM_HEADER_TAG;
}static void vRestore_Demar_Parameter(void)
{memset((void *)(&SystemStoreParam.Demar), 0, sizeof(DemarParam_TypeDef));vFixed_Demar_Value();
}static void vRead_Demar_Parameter(void)
{u16 index = usGet_Flash_Read_Index(FLASH_STORE_DEMAR_PARM_PAGE);if (index < FLASH_STORE_DEMAR_PARM_BLOCK_COUNT){vFlash_Read_DoubleWord(FLASH_STORE_DEMAR_PARM_START_ADDRE + (FLASH_STORE_DEMAR_PARM_BLOCK_SIZE * index), (u64 *)(&SystemStoreParam.Demar), (FLASH_STORE_DEMAR_PARM_BLOCK_SIZE >> 3));vFixed_Demar_Value();#if defined(DEBUG_RELEASE_VERSION_ENABLE) && (DEBUG_RELEASE_VERSION_ENABLE == 0)dprintf("Read Demar Param OK...%u\r\n", SystemStoreParam.Demar.Header.StoreIndex);#endif}else{vRestore_Demar_Parameter();#if defined(DEBUG_RELEASE_VERSION_ENABLE) && (DEBUG_RELEASE_VERSION_ENABLE == 0)dprintf("Restore Demar Param...%u\r\n", SystemStoreParam.Demar.Header.StoreIndex);#endif}#if 1dprintf("--------------------- Demar Param Info ----------------------\r\n");dprintf("            00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F  \r\n");dprintf("-------------------------------------------------------------\r\n");for (index = 0; index < FLASH_STORE_DEMAR_PARM_BLOCK_SIZE; ++index){if (index && (index % 16 == 0)) dprintf("\r\n");if (index % 16 == 0) dprintf("0x%08X  ", (FLASH_STORE_DEMAR_PARM_START_ADDRE + (FLASH_STORE_DEMAR_PARM_BLOCK_SIZE * SystemStoreParam.Demar.Header.StoreIndex) + index));dprintf("%02X ", *(volatile u8 *)(FLASH_STORE_DEMAR_PARM_START_ADDRE + (FLASH_STORE_DEMAR_PARM_BLOCK_SIZE * SystemStoreParam.Demar.Header.StoreIndex) + index));}dprintf("\r\n");dprintf("-------------------------------------------------------------\r\n");dprintf("\r\n\r\n");#endif
}static void vRead_GlobalSystem_Parameter(void)
{vRead_Operat_Parameter();vRead_Demar_Parameter();
}void vRead_System_Parameter(void)
{#if defined(DEBUG_RELEASE_VERSION_ENABLE) && (DEBUG_RELEASE_VERSION_ENABLE == 0)dprintf("OperatParam_TypeDef Size: %u\r\n", sizeof(OperatParam_TypeDef));dprintf("DemarParam_TypeDef  Size: %u\r\n", sizeof(DemarParam_TypeDef));if (sizeof(OperatParam_TypeDef) != FLASH_STORE_OPERAT_PARM_BLOCK_SIZE){dprintf("Operat Param Size Error......\r\n");while (1);}if (sizeof(DemarParam_TypeDef) != FLASH_STORE_DEMAR_PARM_BLOCK_SIZE){dprintf("Demar Param Size Error......\r\n");while (1);}#endifpStoreSysDemar  = &SystemStoreParam.Demar;pStoreSysOperat = &SystemStoreParam.Operat;vRead_GlobalSystem_Parameter();
}

三、写入存储区数据

static u16 usGet_Flash_Write_Index(u16 page)
{u32 startAddr  = FLASH_STORE_DEMAR_PARM_START_ADDRE;u16 blackSize  = FLASH_STORE_DEMAR_PARM_BLOCK_SIZE;u8  blackCount = FLASH_STORE_DEMAR_PARM_BLOCK_COUNT;u16 dat = 0, i = 0, x = 0;u8  tmp = 0, uFlg = 0;if (page == FLASH_STORE_OPERAT_PARM_PAGE){startAddr  = FLASH_STORE_OPERAT_PARM_START_ADDRE;blackSize  = FLASH_STORE_OPERAT_PARM_BLOCK_SIZE;blackCount = FLASH_STORE_OPERAT_PARM_BLOCK_COUNT;}#if defined(DEBUG_RELEASE_VERSION_ENABLE) && (DEBUG_RELEASE_VERSION_ENABLE == 0)dprintf("W-startAddr:%X blackSize:%u blackCount:%u\r\n", startAddr, blackSize, blackCount);#endiffor (i = 0; i < blackCount; ++i){dat = *(volatile u16 *)(startAddr + (blackSize * i));if (dat == 0xFFFFU){uFlg = 0;for (x = 0; x < blackSize; ++x){tmp = *(volatile u8 *)(startAddr + (blackSize * i) + x);if (tmp != 0xFFU){uFlg = 1;break;}}if (!uFlg) {return i;}}}return FLASH_STORE_OPERAT_PARM_BLOCK_COUNT;
}static void vSave_System_Parameter(u16 page)
{u32 startAddr   = FLASH_STORE_DEMAR_PARM_START_ADDRE;u16 blackSize   = FLASH_STORE_DEMAR_PARM_BLOCK_SIZE;u8  blackCount  = FLASH_STORE_DEMAR_PARM_BLOCK_COUNT;u16 StoreIndex  = SystemStoreParam.Demar.Header.StoreIndex;u64 * pSaveDest = (u64 *)(&SystemStoreParam.Demar);u8  * pSrc      = (u8 *)(&SystemStoreParam.Demar);u8   mode = 0, dat = 0;u16  index = 0;if (page == FLASH_STORE_OPERAT_PARM_PAGE){startAddr  = FLASH_STORE_OPERAT_PARM_START_ADDRE;blackSize  = FLASH_STORE_OPERAT_PARM_BLOCK_SIZE;blackCount = FLASH_STORE_OPERAT_PARM_BLOCK_COUNT;StoreIndex = SystemStoreParam.Operat.Header.StoreIndex;pSaveDest  = (u64 *)(&SystemStoreParam.Operat);pSrc       = (u8 *)(&SystemStoreParam.Operat);}for (index = 0; index < blackSize; ++index){dat = *(volatile u8 *)(startAddr + (blackSize * StoreIndex) + index);if (dat != *pSrc++){mode = 1;break;}}if (!mode){#if defined(DEBUG_RELEASE_VERSION_ENABLE) && (DEBUG_RELEASE_VERSION_ENABLE == 0)dprintf("Save Pram Same......Index:%02u  Page:%u\r\n", StoreIndex, page);#endifreturn;}mode  = 0;index = usGet_Flash_Write_Index(page);if (index >= blackCount){index = 0; mode  = 1;}if (page == FLASH_STORE_DEMAR_PARM_PAGE) {SystemStoreParam.Demar.Header.StoreIndex = index;SystemStoreParam.Demar.ubCRC8  = ubCheckSum_CRC8((void *)(&SystemStoreParam.Demar),  XOFS(DemarParam_TypeDef , ubCRC8));}else{SystemStoreParam.Operat.Header.StoreIndex = index;SystemStoreParam.Operat.ubCRC8 = ubCheckSum_CRC8((void *)(&SystemStoreParam.Operat), XOFS(OperatParam_TypeDef, ubCRC8));}if (ubFlash_Write_DoubleWord_EreasePage((startAddr + (blackSize * index)), pSaveDest, (blackSize >> 3), mode)){#if defined(DEBUG_RELEASE_VERSION_ENABLE) && (DEBUG_RELEASE_VERSION_ENABLE == 0)dprintf("Save Pram Error...%u\r\n", index);#endif}else{#if defined(DEBUG_RELEASE_VERSION_ENABLE) && (DEBUG_RELEASE_VERSION_ENABLE == 0)dprintf("Save Pram OK...%u  CRC-Demar:%02X  Operat:%02X\r\n", index, SystemStoreParam.Demar.ubCRC8, SystemStoreParam.Operat.ubCRC8);#endif}
}static void vSynSave_Demar_Parameter(void)
{
}
void vSave_Demar_Parameter(void)
{vSynSave_Demar_Parameter();vSave_System_Parameter(FLASH_STORE_DEMAR_PARM_PAGE);
}static void vSynSave_Operat_Parameter(void)
{
}
void vSave_Operat_Parameter(void)
{vSynSave_Operat_Parameter();vSave_System_Parameter(FLASH_STORE_OPERAT_PARM_PAGE);
}

四、测试函数

• 读取数据:
  void vRead_System_Parameter(void); //读取数据 操作存储区+标定存储区
  
  
  

• 保存数据：
  void vSave_Operat_Parameter(void); //操作存储区
  void vSave_Demar_Parameter(void); //标定存储区

五、测试结果