stm32f10x_flash.c

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/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_flash.h"

/* Flash Access Control Register bits */
#define ACR_LATENCY_Mask         ((uint32_t)0x00000038)
#define ACR_HLFCYA_Mask          ((uint32_t)0xFFFFFFF7)
#define ACR_PRFTBE_Mask          ((uint32_t)0xFFFFFFEF)

/* Flash Access Control Register bits */
#define ACR_PRFTBS_Mask          ((uint32_t)0x00000020) 

/* Flash Control Register bits */
#define CR_PG_Set                ((uint32_t)0x00000001)
#define CR_PG_Reset              ((uint32_t)0x00001FFE) 
#define CR_PER_Set               ((uint32_t)0x00000002)
#define CR_PER_Reset             ((uint32_t)0x00001FFD)
#define CR_MER_Set               ((uint32_t)0x00000004)
#define CR_MER_Reset             ((uint32_t)0x00001FFB)
#define CR_OPTPG_Set             ((uint32_t)0x00000010)
#define CR_OPTPG_Reset           ((uint32_t)0x00001FEF)
#define CR_OPTER_Set             ((uint32_t)0x00000020)
#define CR_OPTER_Reset           ((uint32_t)0x00001FDF)
#define CR_STRT_Set              ((uint32_t)0x00000040)
#define CR_LOCK_Set              ((uint32_t)0x00000080)

/* FLASH Mask */
#define RDPRT_Mask               ((uint32_t)0x00000002)
#define WRP0_Mask                ((uint32_t)0x000000FF)
#define WRP1_Mask                ((uint32_t)0x0000FF00)
#define WRP2_Mask                ((uint32_t)0x00FF0000)
#define WRP3_Mask                ((uint32_t)0xFF000000)
#define OB_USER_BFB2             ((uint16_t)0x0008)

/* FLASH Keys */
#define RDP_Key                  ((uint16_t)0x00A5)
#define FLASH_KEY1               ((uint32_t)0x45670123)
#define FLASH_KEY2               ((uint32_t)0xCDEF89AB)

/* FLASH BANK address */
#define FLASH_BANK1_END_ADDRESS   ((uint32_t)0x807FFFF)

/* Delay definition */   
#define EraseTimeout          ((uint32_t)0x000B0000)
#define ProgramTimeout        ((uint32_t)0x00002000)

void FLASH_SetLatency(uint32_t FLASH_Latency)
{
  uint32_t tmpreg = 0;
  
  /* Check the parameters */
  assert_param(IS_FLASH_LATENCY(FLASH_Latency));
  
  /* Read the ACR register */
  tmpreg = FLASH->ACR;  
  
  /* Sets the Latency value */
  tmpreg &= ACR_LATENCY_Mask;
  tmpreg |= FLASH_Latency;
  
  /* Write the ACR register */
  FLASH->ACR = tmpreg;
}

void FLASH_HalfCycleAccessCmd(uint32_t FLASH_HalfCycleAccess)
{
  /* Check the parameters */
  assert_param(IS_FLASH_HALFCYCLEACCESS_STATE(FLASH_HalfCycleAccess));
  
  /* Enable or disable the Half cycle access */
  FLASH->ACR &= ACR_HLFCYA_Mask;
  FLASH->ACR |= FLASH_HalfCycleAccess;
}

void FLASH_PrefetchBufferCmd(uint32_t FLASH_PrefetchBuffer)
{
  /* Check the parameters */
  assert_param(IS_FLASH_PREFETCHBUFFER_STATE(FLASH_PrefetchBuffer));
  
  /* Enable or disable the Prefetch Buffer */
  FLASH->ACR &= ACR_PRFTBE_Mask;
  FLASH->ACR |= FLASH_PrefetchBuffer;
}

void FLASH_Unlock(void)
{
  /* Authorize the FPEC of Bank1 Access */
  FLASH->KEYR = FLASH_KEY1;
  FLASH->KEYR = FLASH_KEY2;

#ifdef STM32F10X_XL
  /* Authorize the FPEC of Bank2 Access */
  FLASH->KEYR2 = FLASH_KEY1;
  FLASH->KEYR2 = FLASH_KEY2;
#endif /* STM32F10X_XL */
}
void FLASH_UnlockBank1(void)
{
  /* Authorize the FPEC of Bank1 Access */
  FLASH->KEYR = FLASH_KEY1;
  FLASH->KEYR = FLASH_KEY2;
}

#ifdef STM32F10X_XL

void FLASH_UnlockBank2(void)
{
  /* Authorize the FPEC of Bank2 Access */
  FLASH->KEYR2 = FLASH_KEY1;
  FLASH->KEYR2 = FLASH_KEY2;

}
#endif /* STM32F10X_XL */

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 */
}

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

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 */

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;
}

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;
}

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

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 */

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;
}

FLASH_Status FLASH_ProgramWord(uint32_t Address, uint32_t Data)
{
  FLASH_Status status = FLASH_COMPLETE;
  __IO uint32_t tmp = 0;

  /* Check the parameters */
  assert_param(IS_FLASH_ADDRESS(Address));

#ifdef STM32F10X_XL
  if(Address < FLASH_BANK1_END_ADDRESS - 2)
  { 
    /* Wait for last operation to be completed */
    status = FLASH_WaitForLastBank1Operation(ProgramTimeout); 
    if(status == FLASH_COMPLETE)
    {
      /* if the previous operation is completed, proceed to program the new first 
        half word */
      FLASH->CR |= CR_PG_Set;
  
      *(__IO uint16_t*)Address = (uint16_t)Data;
      /* Wait for last operation to be completed */
      status = FLASH_WaitForLastOperation(ProgramTimeout);
 
      if(status == FLASH_COMPLETE)
      {
        /* if the previous operation is completed, proceed to program the new second 
        half word */
        tmp = Address + 2;

        *(__IO uint16_t*) tmp = Data >> 16;
    
        /* Wait for last operation to be completed */
        status = FLASH_WaitForLastOperation(ProgramTimeout);
        
        /* Disable the PG Bit */
        FLASH->CR &= CR_PG_Reset;
      }
      else
      {
        /* Disable the PG Bit */
        FLASH->CR &= CR_PG_Reset;
       }
    }
  }
  else if(Address == (FLASH_BANK1_END_ADDRESS - 1))
  {
    /* Wait for last operation to be completed */
    status = FLASH_WaitForLastBank1Operation(ProgramTimeout);

    if(status == FLASH_COMPLETE)
    {
      /* if the previous operation is completed, proceed to program the new first 
        half word */
      FLASH->CR |= CR_PG_Set;
  
      *(__IO uint16_t*)Address = (uint16_t)Data;

      /* Wait for last operation to be completed */
      status = FLASH_WaitForLastBank1Operation(ProgramTimeout);
      
      /* Disable the PG Bit */
      FLASH->CR &= CR_PG_Reset;
    }
    else
    {
      /* Disable the PG Bit */
      FLASH->CR &= CR_PG_Reset;
    }

    /* Wait for last operation to be completed */
    status = FLASH_WaitForLastBank2Operation(ProgramTimeout);

    if(status == FLASH_COMPLETE)
    {
      /* if the previous operation is completed, proceed to program the new second 
      half word */
      FLASH->CR2 |= CR_PG_Set;
      tmp = Address + 2;

      *(__IO uint16_t*) tmp = Data >> 16;
    
      /* Wait for last operation to be completed */
      status = FLASH_WaitForLastBank2Operation(ProgramTimeout);
        
      /* Disable the PG Bit */
      FLASH->CR2 &= CR_PG_Reset;
    }
    else
    {
      /* Disable the PG Bit */
      FLASH->CR2 &= CR_PG_Reset;
    }
  }
  else
  {
    /* Wait for last operation to be completed */
    status = FLASH_WaitForLastBank2Operation(ProgramTimeout);

    if(status == FLASH_COMPLETE)
    {
      /* if the previous operation is completed, proceed to program the new first 
        half word */
      FLASH->CR2 |= CR_PG_Set;
  
      *(__IO uint16_t*)Address = (uint16_t)Data;
      /* Wait for last operation to be completed */
      status = FLASH_WaitForLastBank2Operation(ProgramTimeout);
 
      if(status == FLASH_COMPLETE)
      {
        /* if the previous operation is completed, proceed to program the new second 
        half word */
        tmp = Address + 2;

        *(__IO uint16_t*) tmp = Data >> 16;
    
        /* Wait for last operation to be completed */
        status = FLASH_WaitForLastBank2Operation(ProgramTimeout);
        
        /* Disable the PG Bit */
        FLASH->CR2 &= CR_PG_Reset;
      }
      else
      {
        /* Disable the PG Bit */
        FLASH->CR2 &= CR_PG_Reset;
      }
    }
  }
#else
  /* Wait for last operation to be completed */
  status = FLASH_WaitForLastOperation(ProgramTimeout);
  
  if(status == FLASH_COMPLETE)
  {
    /* if the previous operation is completed, proceed to program the new first 
    half word */
    FLASH->CR |= CR_PG_Set;
  
    *(__IO uint16_t*)Address = (uint16_t)Data;
    /* Wait for last operation to be completed */
    status = FLASH_WaitForLastOperation(ProgramTimeout);
 
    if(status == FLASH_COMPLETE)
    {
      /* if the previous operation is completed, proceed to program the new second 
      half word */
      tmp = Address + 2;

      *(__IO uint16_t*) tmp = Data >> 16;
    
      /* Wait for last operation to be completed */
      status = FLASH_WaitForLastOperation(ProgramTimeout);
        
      /* Disable the PG Bit */
      FLASH->CR &= CR_PG_Reset;
    }
    else
    {
      /* Disable the PG Bit */
      FLASH->CR &= CR_PG_Reset;
    }
  }         
#endif /* STM32F10X_XL */
   
  /* Return the Program Status */
  return status;
}

FLASH_Status FLASH_ProgramHalfWord(uint32_t Address, uint16_t Data)
{
  FLASH_Status status = FLASH_COMPLETE;
  /* Check the parameters */
  assert_param(IS_FLASH_ADDRESS(Address));

#ifdef STM32F10X_XL
  /* Wait for last operation to be completed */
  status = FLASH_WaitForLastOperation(ProgramTimeout);
  
  if(Address < FLASH_BANK1_END_ADDRESS)
  {
    if(status == FLASH_COMPLETE)
    {
      /* if the previous operation is completed, proceed to program the new data */
      FLASH->CR |= CR_PG_Set;
  
      *(__IO uint16_t*)Address = Data;
      /* Wait for last operation to be completed */
      status = FLASH_WaitForLastBank1Operation(ProgramTimeout);

      /* Disable the PG Bit */
      FLASH->CR &= CR_PG_Reset;
    }
  }
  else
  {
    if(status == FLASH_COMPLETE)
    {
      /* if the previous operation is completed, proceed to program the new data */
      FLASH->CR2 |= CR_PG_Set;
  
      *(__IO uint16_t*)Address = Data;
      /* Wait for last operation to be completed */
      status = FLASH_WaitForLastBank2Operation(ProgramTimeout);

      /* Disable the PG Bit */
      FLASH->CR2 &= CR_PG_Reset;
    }
  }
#else
  /* Wait for last operation to be completed */
  status = FLASH_WaitForLastOperation(ProgramTimeout);
  
  if(status == FLASH_COMPLETE)
  {
    /* if the previous operation is completed, proceed to program the new data */
    FLASH->CR |= CR_PG_Set;
  
    *(__IO uint16_t*)Address = Data;
    /* Wait for last operation to be completed */
    status = FLASH_WaitForLastOperation(ProgramTimeout);
    
    /* Disable the PG Bit */
    FLASH->CR &= CR_PG_Reset;
  } 
#endif  /* STM32F10X_XL */
  
  /* Return the Program Status */
  return status;
}

FLASH_Status FLASH_ProgramOptionByteData(uint32_t Address, uint8_t Data)
{
  FLASH_Status status = FLASH_COMPLETE;
  /* Check the parameters */
  assert_param(IS_OB_DATA_ADDRESS(Address));
  status = FLASH_WaitForLastOperation(ProgramTimeout);

  if(status == FLASH_COMPLETE)
  {
    /* Authorize the small information block programming */
    FLASH->OPTKEYR = FLASH_KEY1;
    FLASH->OPTKEYR = FLASH_KEY2;
    /* Enables the Option Bytes Programming operation */
    FLASH->CR |= CR_OPTPG_Set; 
    *(__IO uint16_t*)Address = Data;
    
    /* 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;
    }
  }
  /* Return the Option Byte Data Program Status */
  return status;
}

FLASH_Status FLASH_EnableWriteProtection(uint32_t FLASH_Pages)
{
  uint16_t WRP0_Data = 0xFFFF, WRP1_Data = 0xFFFF, WRP2_Data = 0xFFFF, WRP3_Data = 0xFFFF;
  
  FLASH_Status status = FLASH_COMPLETE;
  
  /* Check the parameters */
  assert_param(IS_FLASH_WRPROT_PAGE(FLASH_Pages));
  
  FLASH_Pages = (uint32_t)(~FLASH_Pages);
  WRP0_Data = (uint16_t)(FLASH_Pages & WRP0_Mask);
  WRP1_Data = (uint16_t)((FLASH_Pages & WRP1_Mask) >> 8);
  WRP2_Data = (uint16_t)((FLASH_Pages & WRP2_Mask) >> 16);
  WRP3_Data = (uint16_t)((FLASH_Pages & WRP3_Mask) >> 24);
  
  /* Wait for last operation to be completed */
  status = FLASH_WaitForLastOperation(ProgramTimeout);
  
  if(status == FLASH_COMPLETE)
  {
    /* Authorizes the small information block programming */
    FLASH->OPTKEYR = FLASH_KEY1;
    FLASH->OPTKEYR = FLASH_KEY2;
    FLASH->CR |= CR_OPTPG_Set;
    if(WRP0_Data != 0xFF)
    {
      OB->WRP0 = WRP0_Data;
      
      /* Wait for last operation to be completed */
      status = FLASH_WaitForLastOperation(ProgramTimeout);
    }
    if((status == FLASH_COMPLETE) && (WRP1_Data != 0xFF))
    {
      OB->WRP1 = WRP1_Data;
      
      /* Wait for last operation to be completed */
      status = FLASH_WaitForLastOperation(ProgramTimeout);
    }
    if((status == FLASH_COMPLETE) && (WRP2_Data != 0xFF))
    {
      OB->WRP2 = WRP2_Data;
      
      /* Wait for last operation to be completed */
      status = FLASH_WaitForLastOperation(ProgramTimeout);
    }
    
    if((status == FLASH_COMPLETE)&& (WRP3_Data != 0xFF))
    {
      OB->WRP3 = WRP3_Data;
     
      /* 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;
    }
  } 
  /* Return the write protection operation Status */
  return status;       
}

FLASH_Status FLASH_ReadOutProtection(FunctionalState NewState)
{
  FLASH_Status status = FLASH_COMPLETE;
  /* Check the parameters */
  assert_param(IS_FUNCTIONAL_STATE(NewState));
  status = FLASH_WaitForLastOperation(EraseTimeout);
  if(status == FLASH_COMPLETE)
  {
    /* Authorizes the small information block programming */
    FLASH->OPTKEYR = FLASH_KEY1;
    FLASH->OPTKEYR = FLASH_KEY2;
    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; 
      if(NewState != DISABLE)
      {
        OB->RDP = 0x00;
      }
      else
      {
        OB->RDP = RDP_Key;  
      }
      /* Wait for last operation to be completed */
      status = FLASH_WaitForLastOperation(EraseTimeout); 
    
      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 OPTER Bit */
        FLASH->CR &= CR_OPTER_Reset;
      }
    }
  }
  /* Return the protection operation Status */
  return status;       
}

FLASH_Status FLASH_UserOptionByteConfig(uint16_t OB_IWDG, uint16_t OB_STOP, uint16_t OB_STDBY)
{
  FLASH_Status status = FLASH_COMPLETE; 

  /* Check the parameters */
  assert_param(IS_OB_IWDG_SOURCE(OB_IWDG));
  assert_param(IS_OB_STOP_SOURCE(OB_STOP));
  assert_param(IS_OB_STDBY_SOURCE(OB_STDBY));

  /* Authorize the small information block programming */
  FLASH->OPTKEYR = FLASH_KEY1;
  FLASH->OPTKEYR = FLASH_KEY2;
  
  /* Wait for last operation to be completed */
  status = FLASH_WaitForLastOperation(ProgramTimeout);
  
  if(status == FLASH_COMPLETE)
  {  
    /* Enable the Option Bytes Programming operation */
    FLASH->CR |= CR_OPTPG_Set; 
           
    OB->USER = OB_IWDG | (uint16_t)(OB_STOP | (uint16_t)(OB_STDBY | ((uint16_t)0xF8))); 
  
    /* 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;
    }
  }    
  /* Return the Option Byte program Status */
  return status;
}

#ifdef STM32F10X_XL

FLASH_Status FLASH_BootConfig(uint16_t FLASH_BOOT)
{ 
  FLASH_Status status = FLASH_COMPLETE; 
  assert_param(IS_FLASH_BOOT(FLASH_BOOT));
  /* Authorize the small information block programming */
  FLASH->OPTKEYR = FLASH_KEY1;
  FLASH->OPTKEYR = FLASH_KEY2;
  
  /* Wait for last operation to be completed */
  status = FLASH_WaitForLastOperation(ProgramTimeout);
  
  if(status == FLASH_COMPLETE)
  {  
    /* Enable the Option Bytes Programming operation */
    FLASH->CR |= CR_OPTPG_Set; 

    if(FLASH_BOOT == FLASH_BOOT_Bank1)
    {
      OB->USER |= OB_USER_BFB2;
    }
    else
    {
      OB->USER &= (uint16_t)(~(uint16_t)(OB_USER_BFB2));
    }
    /* 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;
    }
  }    
  /* Return the Option Byte program Status */
  return status;
}
#endif /* STM32F10X_XL */

uint32_t FLASH_GetUserOptionByte(void)
{
  /* Return the User Option Byte */
  return (uint32_t)(FLASH->OBR >> 2);
}

uint32_t FLASH_GetWriteProtectionOptionByte(void)
{
  /* Return the Flash write protection Register value */
  return (uint32_t)(FLASH->WRPR);
}

FlagStatus FLASH_GetReadOutProtectionStatus(void)
{
  FlagStatus readoutstatus = RESET;
  if ((FLASH->OBR & RDPRT_Mask) != (uint32_t)RESET)
  {
    readoutstatus = SET;
  }
  else
  {
    readoutstatus = RESET;
  }
  return readoutstatus;
}

FlagStatus FLASH_GetPrefetchBufferStatus(void)
{
  FlagStatus bitstatus = RESET;
  
  if ((FLASH->ACR & ACR_PRFTBS_Mask) != (uint32_t)RESET)
  {
    bitstatus = SET;
  }
  else
  {
    bitstatus = RESET;
  }
  /* Return the new state of FLASH Prefetch Buffer Status (SET or RESET) */
  return bitstatus; 
}

void FLASH_ITConfig(uint32_t FLASH_IT, FunctionalState NewState)
{
#ifdef STM32F10X_XL
  /* Check the parameters */
  assert_param(IS_FLASH_IT(FLASH_IT)); 
  assert_param(IS_FUNCTIONAL_STATE(NewState));

  if((FLASH_IT & 0x80000000) != 0x0)
  {
    if(NewState != DISABLE)
    {
      /* Enable the interrupt sources */
      FLASH->CR2 |= (FLASH_IT & 0x7FFFFFFF);
    }
    else
    {
      /* Disable the interrupt sources */
      FLASH->CR2 &= ~(uint32_t)(FLASH_IT & 0x7FFFFFFF);
    }
  }
  else
  {
    if(NewState != DISABLE)
    {
      /* Enable the interrupt sources */
      FLASH->CR |= FLASH_IT;
    }
    else
    {
      /* Disable the interrupt sources */
      FLASH->CR &= ~(uint32_t)FLASH_IT;
    }
  }
#else
  /* Check the parameters */
  assert_param(IS_FLASH_IT(FLASH_IT)); 
  assert_param(IS_FUNCTIONAL_STATE(NewState));

  if(NewState != DISABLE)
  {
    /* Enable the interrupt sources */
    FLASH->CR |= FLASH_IT;
  }
  else
  {
    /* Disable the interrupt sources */
    FLASH->CR &= ~(uint32_t)FLASH_IT;
  }
#endif /* STM32F10X_XL */
}

FlagStatus FLASH_GetFlagStatus(uint32_t FLASH_FLAG)
{
  FlagStatus bitstatus = RESET;

#ifdef STM32F10X_XL
  /* Check the parameters */
  assert_param(IS_FLASH_GET_FLAG(FLASH_FLAG)) ;
  if(FLASH_FLAG == FLASH_FLAG_OPTERR) 
  {
    if((FLASH->OBR & FLASH_FLAG_OPTERR) != (uint32_t)RESET)
    {
      bitstatus = SET;
    }
    else
    {
      bitstatus = RESET;
    }
  }
  else
  {
    if((FLASH_FLAG & 0x80000000) != 0x0)
    {
      if((FLASH->SR2 & FLASH_FLAG) != (uint32_t)RESET)
      {
        bitstatus = SET;
      }
      else
      {
        bitstatus = RESET;
      }
    }
    else
    {
      if((FLASH->SR & FLASH_FLAG) != (uint32_t)RESET)
      {
        bitstatus = SET;
      }
      else
      {
        bitstatus = RESET;
      }
    }
  }
#else
  /* Check the parameters */
  assert_param(IS_FLASH_GET_FLAG(FLASH_FLAG)) ;
  if(FLASH_FLAG == FLASH_FLAG_OPTERR) 
  {
    if((FLASH->OBR & FLASH_FLAG_OPTERR) != (uint32_t)RESET)
    {
      bitstatus = SET;
    }
    else
    {
      bitstatus = RESET;
    }
  }
  else
  {
   if((FLASH->SR & FLASH_FLAG) != (uint32_t)RESET)
    {
      bitstatus = SET;
    }
    else
    {
      bitstatus = RESET;
    }
  }
#endif /* STM32F10X_XL */

  /* Return the new state of FLASH_FLAG (SET or RESET) */
  return bitstatus;
}

void FLASH_ClearFlag(uint32_t FLASH_FLAG)
{
#ifdef STM32F10X_XL
  /* Check the parameters */
  assert_param(IS_FLASH_CLEAR_FLAG(FLASH_FLAG)) ;

  if((FLASH_FLAG & 0x80000000) != 0x0)
  {
    /* Clear the flags */
    FLASH->SR2 = FLASH_FLAG;
  }
  else
  {
    /* Clear the flags */
    FLASH->SR = FLASH_FLAG;
  }  

#else
  /* Check the parameters */
  assert_param(IS_FLASH_CLEAR_FLAG(FLASH_FLAG)) ;
  
  /* Clear the flags */
  FLASH->SR = FLASH_FLAG;
#endif /* STM32F10X_XL */
}

FLASH_Status FLASH_GetStatus(void)
{
  FLASH_Status flashstatus = FLASH_COMPLETE;
  
  if((FLASH->SR & FLASH_FLAG_BSY) == FLASH_FLAG_BSY) 
  {
    flashstatus = FLASH_BUSY;
  }
  else 
  {  
    if((FLASH->SR & FLASH_FLAG_PGERR) != 0)
    { 
      flashstatus = FLASH_ERROR_PG;
    }
    else 
    {
      if((FLASH->SR & FLASH_FLAG_WRPRTERR) != 0 )
      {
        flashstatus = FLASH_ERROR_WRP;
      }
      else
      {
        flashstatus = FLASH_COMPLETE;
      }
    }
  }
  /* Return the Flash Status */
  return flashstatus;
}

FLASH_Status FLASH_GetBank1Status(void)
{
  FLASH_Status flashstatus = FLASH_COMPLETE;
  
  if((FLASH->SR & FLASH_FLAG_BANK1_BSY) == FLASH_FLAG_BSY) 
  {
    flashstatus = FLASH_BUSY;
  }
  else 
  {  
    if((FLASH->SR & FLASH_FLAG_BANK1_PGERR) != 0)
    { 
      flashstatus = FLASH_ERROR_PG;
    }
    else 
    {
      if((FLASH->SR & FLASH_FLAG_BANK1_WRPRTERR) != 0 )
      {
        flashstatus = FLASH_ERROR_WRP;
      }
      else
      {
        flashstatus = FLASH_COMPLETE;
      }
    }
  }
  /* Return the Flash Status */
  return flashstatus;
}

#ifdef STM32F10X_XL

FLASH_Status FLASH_GetBank2Status(void)
{
  FLASH_Status flashstatus = FLASH_COMPLETE;
  
  if((FLASH->SR2 & (FLASH_FLAG_BANK2_BSY & 0x7FFFFFFF)) == (FLASH_FLAG_BANK2_BSY & 0x7FFFFFFF)) 
  {
    flashstatus = FLASH_BUSY;
  }
  else 
  {  
    if((FLASH->SR2 & (FLASH_FLAG_BANK2_PGERR & 0x7FFFFFFF)) != 0)
    { 
      flashstatus = FLASH_ERROR_PG;
    }
    else 
    {
      if((FLASH->SR2 & (FLASH_FLAG_BANK2_WRPRTERR & 0x7FFFFFFF)) != 0 )
      {
        flashstatus = FLASH_ERROR_WRP;
      }
      else
      {
        flashstatus = FLASH_COMPLETE;
      }
    }
  }
  /* Return the Flash Status */
  return flashstatus;
}
#endif /* STM32F10X_XL */

FLASH_Status FLASH_WaitForLastOperation(uint32_t Timeout)
{ 
  FLASH_Status status = FLASH_COMPLETE;
   
  /* Check for the Flash Status */
  status = FLASH_GetBank1Status();
  /* Wait for a Flash operation to complete or a TIMEOUT to occur */
  while((status == FLASH_BUSY) && (Timeout != 0x00))
  {
    status = FLASH_GetBank1Status();
    Timeout--;
  }
  if(Timeout == 0x00 )
  {
    status = FLASH_TIMEOUT;
  }
  /* Return the operation status */
  return status;
}

FLASH_Status FLASH_WaitForLastBank1Operation(uint32_t Timeout)
{ 
  FLASH_Status status = FLASH_COMPLETE;
   
  /* Check for the Flash Status */
  status = FLASH_GetBank1Status();
  /* Wait for a Flash operation to complete or a TIMEOUT to occur */
  while((status == FLASH_FLAG_BANK1_BSY) && (Timeout != 0x00))
  {
    status = FLASH_GetBank1Status();
    Timeout--;
  }
  if(Timeout == 0x00 )
  {
    status = FLASH_TIMEOUT;
  }
  /* Return the operation status */
  return status;
}

#ifdef STM32F10X_XL

FLASH_Status FLASH_WaitForLastBank2Operation(uint32_t Timeout)
{ 
  FLASH_Status status = FLASH_COMPLETE;
   
  /* Check for the Flash Status */
  status = FLASH_GetBank2Status();
  /* Wait for a Flash operation to complete or a TIMEOUT to occur */
  while((status == (FLASH_FLAG_BANK2_BSY & 0x7FFFFFFF)) && (Timeout != 0x00))
  {
    status = FLASH_GetBank2Status();
    Timeout--;
  }
  if(Timeout == 0x00 )
  {
    status = FLASH_TIMEOUT;
  }
  /* Return the operation status */
  return status;
}
#endif /* STM32F10X_XL */

/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/