C 在EEPROM、微控制器中存储数据

我正在使用MCF51EM256飞思卡尔微控制器，在EEPROM中存储一些数据以使其持久化时遇到了一些问题

我需要将此结构存储在EEPROM中：

typedef struct {
  ui64_s Ea_ps; 
  ui64_s Ea_ng;  
  ui64_s Er_q1;
  ui64_s Er_q2;
  ui64_s Er_q3;
  ui64_s Er_q4;
  uint16 F_ea;
  uint16 F_er;
}Ws_EnergyAcc64;

其中：

typedef union{    
  uint64 v;
  uint32 p[2];  
} ui64_s;

以及：

为此，我实现了以下功能：

void Save_EEPROM_WsEnergyAcc(long addr, Ws_EnergyAcc64* Acc) {

  // WsEnergyAcc struct needs 56 bytes in EEPROM

  uint32 F_ea_32 = (uint32) Acc->F_ea;
  uint32 F_er_32 = (uint32) Acc->F_er;

  Flash_Burst(addr, 2, Acc->Ea_ps.p);
  Flash_Burst(addr + 8, 2, Acc->Ea_ng.p);
  Flash_Burst(addr + 16, 2, Acc->Er_q1.p);
  Flash_Burst(addr + 24, 2, Acc->Er_q2.p);
  Flash_Burst(addr + 32, 2, Acc->Er_q3.p);
  Flash_Burst(addr + 40, 2, Acc->Er_q4.p);

  Flash_Burst(addr + 48, 2, &F_ea_32);
  Flash_Burst(addr + 52, 2, &F_er_32);

}

“闪光爆发”的位置：

以及：

如果我只在EEPROM中写入一次，它会工作，但如果我写入EEPROM更多次，如示例所示，它不会工作，总是打印0x1000000

有人能帮我吗？为什么不起作用？如果我能写一次，为什么我不能写更多次

---

谢谢大家!

每次您想写入一个

EEPROM

时，您必须将其擦除。第一次工作时，可能是因为

JTAG

执行了大规模擦除

---

还要注意的是，现代MCU中的EEPROM是模拟的，并且使用了部分片上闪存。这更好地解释了为什么您必须在写入之前擦除它。

似乎您混淆了EEPROM和闪存。你在任何地方都写EEPROM，但看起来你实际上在使用闪存。@ElderBug许多MCU都有EEPROM仿真模块。很明显，它写在闪存上。@LPs我还没有看到任何在闪存上宣传EEPROM的广告。我见过的所有MCU要么将EEPROM作为EEPROM（可能是模拟的，但不是明确的），要么就是不这样做，只提供闪存。OP的MCU是后一种情况；它没有EEPROM。不管怎样，显然最好不要把两者混淆，即使它们有相似之处。谢谢！我有宏Flash_Erase，但我没有使用它，因为它在我的项目中导致编译错误。我将在其他帖子中询问此事。非常感谢你！

void Save_EEPROM_WsEnergyAcc(long addr, Ws_EnergyAcc64* Acc) {

  // WsEnergyAcc struct needs 56 bytes in EEPROM

  uint32 F_ea_32 = (uint32) Acc->F_ea;
  uint32 F_er_32 = (uint32) Acc->F_er;

  Flash_Burst(addr, 2, Acc->Ea_ps.p);
  Flash_Burst(addr + 8, 2, Acc->Ea_ng.p);
  Flash_Burst(addr + 16, 2, Acc->Er_q1.p);
  Flash_Burst(addr + 24, 2, Acc->Er_q2.p);
  Flash_Burst(addr + 32, 2, Acc->Er_q3.p);
  Flash_Burst(addr + 40, 2, Acc->Er_q4.p);

  Flash_Burst(addr + 48, 2, &F_ea_32);
  Flash_Burst(addr + 52, 2, &F_er_32);

}

#define Flash_Burst(Address, Size, DataPtr) \
      Flash_Cmd((UINT32)Address, (UINT16)Size, (UINT32*)DataPtr, FLASH_BURST_CMD)

UINT8 /*far*/ 
Flash_Cmd(UINT32 FlashAddress, 
      UINT16 FlashDataCounter, 
      UINT32 *pFlashDataPtr, 
      UINT8 FlashCommand)
{
  /* Check to see if FACCERR or PVIOL is set */
  if (FSTAT &0x30)  
  {         
      /* Clear Flags if set*/
      FSTAT = 0x30;  
  }

  if (FlashDataCounter)
  {
    do
    {
        /* Wait for the Last Busrt Command to complete */
        while(!(FSTAT&FSTAT_FCBEF_MASK)){};/*wait until termination*/

        /* Write Data into Flash*/
        (*((volatile unsigned long *)(FlashAddress))) = *pFlashDataPtr;
        FlashAddress += 4;
        pFlashDataPtr++;

        /* Write Command */
        FCMD = FlashCommand;

        /* Put FCBEF at 1 */
        FSTAT = FSTAT_FCBEF_MASK;

        asm (NOP);
        asm (NOP);
        asm (NOP);

         /* Check if Flash Access Error or Protection Violation Error are Set */
        if (FSTAT&0x30)
        {     
          /* If so, finish the function returning 1 to indicate error */
          return (1);
        }

    }while (--FlashDataCounter);
  }
  /* wait for the last command to complete */
  while ((FSTAT&FSTAT_FCCF_MASK)==0){};/*wait until termination*/

  /* Return zero to indicate that the function executed OK */
  return (0);
}

void Init_EEPROM_WsEnergyAcc(long addr, Ws_EnergyAcc64* Acc) {

  uint32 F_ea_32;
  uint32 F_er_32;

  Acc->Ea_ps.p[0] = *(uint32 *)addr;
  addr = addr + 4;
  Acc->Ea_ps.p[1] = *(uint32 *)addr;
  Acc->Ea_ps.v = (uint64) Acc->Ea_ps.p[0] << 32 | Acc->Ea_ps.p[1];

  addr = addr + 4;
  Acc->Ea_ng.p[0] = *(uint32 *)addr;
  addr = addr + 4;
  Acc->Ea_ng.p[1] = *(uint32 *)addr;
  Acc->Ea_ng.v = (uint64) Acc->Ea_ng.p[0] << 32 | Acc->Ea_ng.p[1];

  addr = addr + 4;
  Acc->Er_q1.p[0] = *(uint32*)addr;
  addr = addr + 4;
  Acc->Er_q1.p[1] = *(uint32*)addr;
  Acc->Er_q1.v = (uint64) Acc->Er_q1.p[0] << 32 | Acc->Er_q1.p[1];

  addr = addr + 4;
  Acc->Er_q2.p[0] = *(uint32*)addr;
  addr = addr + 4;
  Acc->Er_q2.p[1] = *(uint32*)addr;
  Acc->Er_q2.v = (uint64) Acc->Er_q2.p[0] << 32 | Acc->Er_q2.p[1];

  addr = addr + 4;
  Acc->Er_q3.p[0] = *(uint32*)addr;
  addr = addr + 4;
  Acc->Er_q3.p[1] = *(uint32*)addr;
  Acc->Er_q3.v = (uint64) Acc->Er_q3.p[0] << 32 | Acc->Er_q3.p[1];  

  addr = addr + 4;
  Acc->Er_q4.p[0] = *(uint32*)addr;
  addr = addr + 4;
  Acc->Er_q4.p[1] = *(uint32*)addr;
  Acc->Er_q4.v = (uint64) Acc->Er_q4.p[0] << 32 | Acc->Er_q4.p[1];  

  addr = addr + 4;
  F_ea_32 = *(uint32*) addr;
  Acc->F_ea = (uint16) F_ea_32;

  addr = addr + 4;
  F_er_32 = *(uint32*) addr;
  Acc->F_er = (uint16) F_er_32;

void testEEPROM(Ws_EnergyAcc64* Acc){

      Ws_EnergyAcc64 checkStruct;

      Acc->Ea_ps.p[0] = 0x10000000;
      Acc->Ea_ps.p[1] = 0x10000000;
      Acc->Ea_ng.p[0] = 0x10000000;
      Acc->Ea_ng.p[1] = 0x10000000;
      Acc->Er_q1.p[0] = 0x10000000;
      Acc->Er_q1.p[1] = 0x10000000;
      Acc->Er_q2.p[0] = 0x10000000;
      Acc->Er_q2.p[1] = 0x10000000;
      Acc->Er_q3.p[0] = 0x10000000;
      Acc->Er_q3.p[1] = 0x10000000;
      Acc->Er_q4.p[0] = 0x10000000;
      Acc->Er_q4.p[1] = 0x10000000;
      Acc->F_ea = 0x0000;
      Acc->F_er = 0x0000;

     Save_EEPROM_WsEnergyAcc(PhR_ABS_Ws_addr, Acc);

     Acc->Ea_ps.p[0] = 0x10011001;
     Acc->Ea_ps.p[1] = 0x10011002;
     Acc->Ea_ng.p[0] = 0x10011003;
     Acc->Ea_ng.p[1] = 0x10011004;
     Acc->Er_q1.p[0] = 0x10011005;
     Acc->Er_q1.p[1] = 0x10011006;
     Acc->Er_q2.p[0] = 0x10011007;
     Acc->Er_q2.p[1] = 0x10011008;
     Acc->Er_q3.p[0] = 0x10011009;
     Acc->Er_q3.p[1] = 0x1001100A;
     Acc->Er_q4.p[0] = 0x1001100B;
     Acc->Er_q4.p[1] = 0x1001100C;
     Acc->F_ea = 0x0000;
     Acc->F_er = 0x0000;

     Save_EEPROM_WsEnergyAcc(PhR_ABS_Ws_addr, Acc);     
     Init_EEPROM_WsEnergyAcc(PhR_ABS_Ws_addr, &checkStruct);

     printf("%d\n", checkStruct.Ea_ps.p[0]);
     printf("%d\n", checkStruct.Ea_ps.p[1]);
     printf("%d\n", checkStruct.Ea_ng.p[0]);
     printf("%d\n", checkStruct.Ea_ng.p[1]);
     printf("%d\n", checkStruct.Er_q1.p[0]);
     printf("%d\n", checkStruct.Er_q1.p[1]);
     printf("%d\n", checkStruct.Er_q2.p[0]);
     printf("%d\n", checkStruct.Er_q2.p[1]);
     printf("%d\n", checkStruct.Er_q3.p[0]);
     printf("%d\n", checkStruct.Er_q3.p[1]);
     printf("%d\n", checkStruct.Er_q4.p[0]);
     printf("%d\n", checkStruct.Er_q4.p[1]);
}