stm32f10x_flash.c

stm32 红外万年历

  * @retval None
  */
void FLASH_UnlockBank1(void)
{
  /* Authorize the FPEC of Bank1 Access */
  FLASH->KEYR = FLASH_KEY1;
  FLASH->KEYR = FLASH_KEY2;
}

#ifdef STM32F10X_XL
/**
  * @brief  Unlocks the FLASH Bank2 Program Erase Controller.
  * @note   This function can be used only for STM32F10X_XL density devices.
  * @param  None
  * @retval None
  */
void FLASH_UnlockBank2(void)
{
  /* Authorize the FPEC of Bank2 Access */
  FLASH->KEYR2 = FLASH_KEY1;
  FLASH->KEYR2 = FLASH_KEY2;

}
#endif /* STM32F10X_XL */

/**
  * @brief  Locks the FLASH Program Erase Controller.
  * @note   This function can be used for all STM32F10x devices.
  *         - For STM32F10X_XL devices this function Locks Bank1 and Bank2.
  *         - For all other devices it Locks Bank1 and it is equivalent 
  *           to FLASH_LockBank1 function.
  * @param  None
  * @retval None
  */
void FLASH_Lock(void)
{
  /* Set the Lock Bit to lock the FPEC and the CR of  Bank1 */
  FLASH->CR |= CR_LOCK_Set;

#ifdef STM32F10X_XL
  /* Set the Lock Bit to lock the FPEC and the CR of  Bank2 */
  FLASH->CR2 |= CR_LOCK_Set;
#endif /* STM32F10X_XL */
}

/**
  * @brief  Locks the FLASH Bank1 Program Erase Controller.
  * @note   this function can be used for all STM32F10x devices.
  *         - For STM32F10X_XL devices this function Locks Bank1.
  *         - For all other devices it Locks Bank1 and it is equivalent 
  *           to FLASH_Lock function.
  * @param  None
  * @retval None
  */
void FLASH_LockBank1(void)
{
  /* Set the Lock Bit to lock the FPEC and the CR of  Bank1 */
  FLASH->CR |= CR_LOCK_Set;
}

#ifdef STM32F10X_XL
/**
  * @brief  Locks the FLASH Bank2 Program Erase Controller.
  * @note   This function can be used only for STM32F10X_XL density devices.
  * @param  None
  * @retval None
  */
void FLASH_LockBank2(void)
{
  /* Set the Lock Bit to lock the FPEC and the CR of  Bank2 */
  FLASH->CR2 |= CR_LOCK_Set;
}
#endif /* STM32F10X_XL */

/**
  * @brief  Erases a specified FLASH page.
  * @note   This function can be used for all STM32F10x devices.
  * @param  Page_Address: The page address to be erased.
  * @retval FLASH Status: The returned value can be: FLASH_BUSY, FLASH_ERROR_PG,
  *         FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
  */
FLASH_Status FLASH_ErasePage(uint32_t Page_Address)
{
  FLASH_Status status = FLASH_COMPLETE;
  /* Check the parameters */
  assert_param(IS_FLASH_ADDRESS(Page_Address));

#ifdef STM32F10X_XL
  if(Page_Address < FLASH_BANK1_END_ADDRESS)  
  {
    /* Wait for last operation to be completed */
    status = FLASH_WaitForLastBank1Operation(EraseTimeout);
    if(status == FLASH_COMPLETE)
    { 
      /* if the previous operation is completed, proceed to erase the page */
      FLASH->CR|= CR_PER_Set;
      FLASH->AR = Page_Address; 
      FLASH->CR|= CR_STRT_Set;
    
      /* Wait for last operation to be completed */
      status = FLASH_WaitForLastBank1Operation(EraseTimeout);

      /* Disable the PER Bit */
      FLASH->CR &= CR_PER_Reset;
    }
  }
  else
  {
    /* Wait for last operation to be completed */
    status = FLASH_WaitForLastBank2Operation(EraseTimeout);
    if(status == FLASH_COMPLETE)
    { 
      /* if the previous operation is completed, proceed to erase the page */
      FLASH->CR2|= CR_PER_Set;
      FLASH->AR2 = Page_Address; 
      FLASH->CR2|= CR_STRT_Set;
    
      /* Wait for last operation to be completed */
      status = FLASH_WaitForLastBank2Operation(EraseTimeout);
      
      /* Disable the PER Bit */
      FLASH->CR2 &= CR_PER_Reset;
    }
  }
#else
  /* Wait for last operation to be completed */
  status = FLASH_WaitForLastOperation(EraseTimeout);
  
  if(status == FLASH_COMPLETE)
  { 
    /* if the previous operation is completed, proceed to erase the page */
    FLASH->CR|= CR_PER_Set;
    FLASH->AR = Page_Address; 
    FLASH->CR|= CR_STRT_Set;
    
    /* Wait for last operation to be completed */
    status = FLASH_WaitForLastOperation(EraseTimeout);
    
    /* Disable the PER Bit */
    FLASH->CR &= CR_PER_Reset;
  }
#endif /* STM32F10X_XL */

  /* Return the Erase Status */
  return status;
}

/**
  * @brief  Erases all FLASH pages.
  * @note   This function can be used for all STM32F10x devices.
  * @param  None
  * @retval FLASH Status: The returned value can be: FLASH_ERROR_PG,
  *         FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
  */
FLASH_Status FLASH_EraseAllPages(void)
{
  FLASH_Status status = FLASH_COMPLETE;

#ifdef STM32F10X_XL
  /* Wait for last operation to be completed */
  status = FLASH_WaitForLastBank1Operation(EraseTimeout);
  
  if(status == FLASH_COMPLETE)
  {
    /* if the previous operation is completed, proceed to erase all pages */
     FLASH->CR |= CR_MER_Set;
     FLASH->CR |= CR_STRT_Set;
    
    /* Wait for last operation to be completed */
    status = FLASH_WaitForLastBank1Operation(EraseTimeout);
    
    /* Disable the MER Bit */
    FLASH->CR &= CR_MER_Reset;
  }    
  if(status == FLASH_COMPLETE)
  {
    /* if the previous operation is completed, proceed to erase all pages */
     FLASH->CR2 |= CR_MER_Set;
     FLASH->CR2 |= CR_STRT_Set;
    
    /* Wait for last operation to be completed */
    status = FLASH_WaitForLastBank2Operation(EraseTimeout);
    
    /* Disable the MER Bit */
    FLASH->CR2 &= CR_MER_Reset;
  }
#else
  /* Wait for last operation to be completed */
  status = FLASH_WaitForLastOperation(EraseTimeout);
  if(status == FLASH_COMPLETE)
  {
    /* if the previous operation is completed, proceed to erase all pages */
     FLASH->CR |= CR_MER_Set;
     FLASH->CR |= CR_STRT_Set;
    
    /* Wait for last operation to be completed */
    status = FLASH_WaitForLastOperation(EraseTimeout);

    /* Disable the MER Bit */
    FLASH->CR &= CR_MER_Reset;
  }
#endif /* STM32F10X_XL */

  /* Return the Erase Status */
  return status;
}

/**
  * @brief  Erases all Bank1 FLASH pages.
  * @note   This function can be used for all STM32F10x devices.
  *         - For STM32F10X_XL devices this function erases all Bank1 pages.
  *         - For all other devices it erases all Bank1 pages and it is equivalent 
  *           to FLASH_EraseAllPages function.
  * @param  None
  * @retval FLASH Status: The returned value can be: FLASH_ERROR_PG,
  *         FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
  */
FLASH_Status FLASH_EraseAllBank1Pages(void)
{
  FLASH_Status status = FLASH_COMPLETE;
  /* Wait for last operation to be completed */
  status = FLASH_WaitForLastBank1Operation(EraseTimeout);
  
  if(status == FLASH_COMPLETE)
  {
    /* if the previous operation is completed, proceed to erase all pages */
     FLASH->CR |= CR_MER_Set;
     FLASH->CR |= CR_STRT_Set;
    
    /* Wait for last operation to be completed */
    status = FLASH_WaitForLastBank1Operation(EraseTimeout);
    
    /* Disable the MER Bit */
    FLASH->CR &= CR_MER_Reset;
  }    
  /* Return the Erase Status */
  return status;
}

#ifdef STM32F10X_XL
/**
  * @brief  Erases all Bank2 FLASH pages.
  * @note   This function can be used only for STM32F10x_XL density devices.
  * @param  None
  * @retval FLASH Status: The returned value can be: FLASH_ERROR_PG,
  *         FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
  */
FLASH_Status FLASH_EraseAllBank2Pages(void)
{
  FLASH_Status status = FLASH_COMPLETE;
  /* Wait for last operation to be completed */
  status = FLASH_WaitForLastBank2Operation(EraseTimeout);
  
  if(status == FLASH_COMPLETE)
  {
    /* if the previous operation is completed, proceed to erase all pages */
     FLASH->CR2 |= CR_MER_Set;
     FLASH->CR2 |= CR_STRT_Set;
    
    /* Wait for last operation to be completed */
    status = FLASH_WaitForLastBank2Operation(EraseTimeout);

    /* Disable the MER Bit */
    FLASH->CR2 &= CR_MER_Reset;
  }    
  /* Return the Erase Status */
  return status;
}
#endif /* STM32F10X_XL */

/**
  * @brief  Erases the FLASH option bytes.
  * @note   This functions erases all option bytes except the Read protection (RDP). 
  * @note   This function can be used for all STM32F10x devices.
  * @param  None
  * @retval FLASH Status: The returned value can be: FLASH_ERROR_PG,
  *         FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
  */
FLASH_Status FLASH_EraseOptionBytes(void)
{
  uint16_t rdptmp = RDP_Key;

  FLASH_Status status = FLASH_COMPLETE;

  /* Get the actual read protection Option Byte value */ 
  if(FLASH_GetReadOutProtectionStatus() != RESET)
  {
    rdptmp = 0x00;  
  }

  /* Wait for last operation to be completed */
  status = FLASH_WaitForLastOperation(EraseTimeout);
  if(status == FLASH_COMPLETE)
  {
    /* Authorize the small information block programming */
    FLASH->OPTKEYR = FLASH_KEY1;
    FLASH->OPTKEYR = FLASH_KEY2;
    
    /* if the previous operation is completed, proceed to erase the option bytes */
    FLASH->CR |= CR_OPTER_Set;
    FLASH->CR |= CR_STRT_Set;
    /* Wait for last operation to be completed */
    status = FLASH_WaitForLastOperation(EraseTimeout);
    
    if(status == FLASH_COMPLETE)
    {
      /* if the erase operation is completed, disable the OPTER Bit */
      FLASH->CR &= CR_OPTER_Reset;
       
      /* Enable the Option Bytes Programming operation */
      FLASH->CR |= CR_OPTPG_Set;
      /* Restore the last read protection Option Byte value */
      OB->RDP = (uint16_t)rdptmp; 
      /* Wait for last operation to be completed */
      status = FLASH_WaitForLastOperation(ProgramTimeout);
 
      if(status != FLASH_TIMEOUT)
      {
        /* if the program operation is completed, disable the OPTPG Bit */
        FLASH->CR &= CR_OPTPG_Reset;
      }
    }
    else
    {
      if (status != FLASH_TIMEOUT)
      {
        /* Disable the OPTPG Bit */
        FLASH->CR &= CR_OPTPG_Reset;
      }
    }  
  }
  /* Return the erase status */
  return status;
}

/**
  * @brief  Programs a word at a specified address.