stm32f30x_flash.c

Go to the documentation of this file.

/* Includes ------------------------------------------------------------------*/
#include "stm32f30x_flash.h"

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/

/* FLASH Mask */
#define RDPRT_MASK                 ((uint32_t)0x00000002)
#define WRP01_MASK                 ((uint32_t)0x0000FFFF)
#define WRP23_MASK                 ((uint32_t)0xFFFF0000)
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/

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 &= (uint32_t) (~((uint32_t)FLASH_ACR_LATENCY));
  tmpreg |= FLASH_Latency;
  
  /* Write the ACR register */
  FLASH->ACR = tmpreg;
}

void FLASH_HalfCycleAccessCmd(FunctionalState NewState)
{
  /* Check the parameters */
  assert_param(IS_FUNCTIONAL_STATE(NewState));
   
  if(NewState != DISABLE)
  {
    FLASH->ACR |= FLASH_ACR_HLFCYA;
  }
  else
  {
    FLASH->ACR &= (uint32_t)(~((uint32_t)FLASH_ACR_HLFCYA));
  }
}

void FLASH_PrefetchBufferCmd(FunctionalState NewState)
{
  /* Check the parameters */
  assert_param(IS_FUNCTIONAL_STATE(NewState));
   
  if(NewState != DISABLE)
  {
    FLASH->ACR |= FLASH_ACR_PRFTBE;
  }
  else
  {
    FLASH->ACR &= (uint32_t)(~((uint32_t)FLASH_ACR_PRFTBE));
  }
}

void FLASH_Unlock(void)
{
  if((FLASH->CR & FLASH_CR_LOCK) != RESET)
  {
    /* Authorize the FLASH Registers access */
    FLASH->KEYR = FLASH_KEY1;
    FLASH->KEYR = FLASH_KEY2;
  }  
}

void FLASH_Lock(void)
{
  /* Set the LOCK Bit to lock the FLASH Registers access */
  FLASH->CR |= FLASH_CR_LOCK;
}

FLASH_Status FLASH_ErasePage(uint32_t Page_Address)
{
  FLASH_Status status = FLASH_COMPLETE;

  /* Check the parameters */
  assert_param(IS_FLASH_PROGRAM_ADDRESS(Page_Address));
 
  /* Wait for last operation to be completed */
  status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
  
  if(status == FLASH_COMPLETE)
  { 
    /* If the previous operation is completed, proceed to erase the page */
    FLASH->CR |= FLASH_CR_PER;
    FLASH->AR  = Page_Address; 
    FLASH->CR |= FLASH_CR_STRT;
    
    /* Wait for last operation to be completed */
    status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
    
    /* Disable the PER Bit */
    FLASH->CR &= ~FLASH_CR_PER;
  }
    
  /* Return the Erase Status */
  return status;
}

FLASH_Status FLASH_EraseAllPages(void)
{
  FLASH_Status status = FLASH_COMPLETE;

  /* Wait for last operation to be completed */
  status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
  
  if(status == FLASH_COMPLETE)
  {
    /* if the previous operation is completed, proceed to erase all pages */
     FLASH->CR |= FLASH_CR_MER;
     FLASH->CR |= FLASH_CR_STRT;
    
    /* Wait for last operation to be completed */
    status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);

    /* Disable the MER Bit */
    FLASH->CR &= ~FLASH_CR_MER;
  }

  /* 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_PROGRAM_ADDRESS(Address));

  /* Wait for last operation to be completed */
  status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
  
  if(status == FLASH_COMPLETE)
  {
    /* If the previous operation is completed, proceed to program the new first 
    half word */
    FLASH->CR |= FLASH_CR_PG;
  
    *(__IO uint16_t*)Address = (uint16_t)Data;
    
    /* Wait for last operation to be completed */
    status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
 
    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(FLASH_ER_PRG_TIMEOUT);
        
      /* Disable the PG Bit */
      FLASH->CR &= ~FLASH_CR_PG;
    }
    else
    {
      /* Disable the PG Bit */
      FLASH->CR &= ~FLASH_CR_PG;
    }
  }
   
  /* 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_PROGRAM_ADDRESS(Address));

  /* Wait for last operation to be completed */
  status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
  
  if(status == FLASH_COMPLETE)
  {
    /* If the previous operation is completed, proceed to program the new data */
    FLASH->CR |= FLASH_CR_PG;
  
    *(__IO uint16_t*)Address = Data;

    /* Wait for last operation to be completed */
    status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
    
    /* Disable the PG Bit */
    FLASH->CR &= ~FLASH_CR_PG;
  } 
  
  /* Return the Program Status */
  return status;
}

void FLASH_OB_Unlock(void)
{
  if((FLASH->CR & FLASH_CR_OPTWRE) == RESET)
  { 
    /* Unlocking the option bytes block access */
    FLASH->OPTKEYR = FLASH_OPTKEY1;
    FLASH->OPTKEYR = FLASH_OPTKEY2;
  }
}

void FLASH_OB_Lock(void)
{
  /* Set the OPTWREN Bit to lock the option bytes block access */
  FLASH->CR &= ~FLASH_CR_OPTWRE;
}

void FLASH_OB_Launch(void)
{
  /* Set the OBL_Launch bit to launch the option byte loading */
  FLASH->CR |= FLASH_CR_OBL_LAUNCH; 
}

FLASH_Status FLASH_OB_Erase(void)
{
  uint16_t rdptmp = OB_RDP_Level_0;

  FLASH_Status status = FLASH_COMPLETE;

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

  /* Wait for last operation to be completed */
  status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);

  if(status == FLASH_COMPLETE)
  {   
    /* If the previous operation is completed, proceed to erase the option bytes */
    FLASH->CR |= FLASH_CR_OPTER;
    FLASH->CR |= FLASH_CR_STRT;

    /* Wait for last operation to be completed */
    status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
    
    if(status == FLASH_COMPLETE)
    {
      /* If the erase operation is completed, disable the OPTER Bit */
      FLASH->CR &= ~FLASH_CR_OPTER;
       
      /* Enable the Option Bytes Programming operation */
      FLASH->CR |= FLASH_CR_OPTPG;

      /* Restore the last read protection Option Byte value */
      OB->RDP = (uint16_t)rdptmp; 

      /* Wait for last operation to be completed */
      status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
 
      if(status != FLASH_TIMEOUT)
      {
        /* if the program operation is completed, disable the OPTPG Bit */
        FLASH->CR &= ~FLASH_CR_OPTPG;
      }
    }
    else
    {
      if (status != FLASH_TIMEOUT)
      {
        /* Disable the OPTPG Bit */
        FLASH->CR &= ~FLASH_CR_OPTPG;
      }
    }  
  }
  /* Return the erase status */
  return status;
}

FLASH_Status FLASH_OB_EnableWRP(uint32_t OB_WRP)
{
  uint16_t WRP0_Data = 0xFFFF, WRP1_Data = 0xFFFF;
  
  FLASH_Status status = FLASH_COMPLETE;
  
  /* Check the parameters */
  assert_param(IS_OB_WRP(OB_WRP));
    
  OB_WRP = (uint32_t)(~OB_WRP);
  WRP0_Data = (uint16_t)(OB_WRP & OB_WRP0_WRP0);
  WRP1_Data = (uint16_t)((OB_WRP & OB_WRP0_nWRP0) >> 8);
  
  /* Wait for last operation to be completed */
  status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
  
  if(status == FLASH_COMPLETE)
  {
    FLASH->CR |= FLASH_CR_OPTPG;

    if(WRP0_Data != 0xFF)
    {
      OB->WRP0 = WRP0_Data;
      
      /* Wait for last operation to be completed */
      status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
    }
    if((status == FLASH_COMPLETE) && (WRP1_Data != 0xFF))
    {
      OB->WRP1 = WRP1_Data;
      
      /* Wait for last operation to be completed */
      status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
    }
    if(status != FLASH_TIMEOUT)
    {
      /* if the program operation is completed, disable the OPTPG Bit */
      FLASH->CR &= ~FLASH_CR_OPTPG;
    }
  } 
  /* Return the write protection operation Status */
  return status;      
}

FLASH_Status FLASH_OB_RDPConfig(uint8_t OB_RDP)
{
  FLASH_Status status = FLASH_COMPLETE;
  
  /* Check the parameters */
  assert_param(IS_OB_RDP(OB_RDP));
  status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
  
  if(status == FLASH_COMPLETE)
  {
    FLASH->CR |= FLASH_CR_OPTER;
    FLASH->CR |= FLASH_CR_STRT;
    
    /* Wait for last operation to be completed */
    status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
    
    if(status == FLASH_COMPLETE)
    {
      /* If the erase operation is completed, disable the OPTER Bit */
      FLASH->CR &= ~FLASH_CR_OPTER;
      
      /* Enable the Option Bytes Programming operation */
      FLASH->CR |= FLASH_CR_OPTPG;
       
      OB->RDP = OB_RDP;

      /* Wait for last operation to be completed */
      status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT); 
    
      if(status != FLASH_TIMEOUT)
      {
        /* if the program operation is completed, disable the OPTPG Bit */
        FLASH->CR &= ~FLASH_CR_OPTPG;
      }
    }
    else 
    {
      if(status != FLASH_TIMEOUT)
      {
        /* Disable the OPTER Bit */
        FLASH->CR &= ~FLASH_CR_OPTER;
      }
    }
  }
  /* Return the protection operation Status */
  return status;             
}

FLASH_Status FLASH_OB_UserConfig(uint8_t OB_IWDG, uint8_t OB_STOP, uint8_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(FLASH_ER_PRG_TIMEOUT);
  
  if(status == FLASH_COMPLETE)
  {  
    /* Enable the Option Bytes Programming operation */
    FLASH->CR |= FLASH_CR_OPTPG; 
           
    OB->USER = (uint8_t)((uint8_t)(OB_IWDG | OB_STOP) | (uint8_t)(OB_STDBY |0xF8));
  
    /* Wait for last operation to be completed */
    status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);

    if(status != FLASH_TIMEOUT)
    {
      /* if the program operation is completed, disable the OPTPG Bit */
      FLASH->CR &= ~FLASH_CR_OPTPG;
    }
  }    
  /* Return the Option Byte program Status */
  return status;
}

FLASH_Status FLASH_OB_BOOTConfig(uint8_t OB_BOOT1)
{
  FLASH_Status status = FLASH_COMPLETE; 

  /* Check the parameters */
  assert_param(IS_OB_BOOT1(OB_BOOT1));

  /* Authorize the small information block programming */
  FLASH->OPTKEYR = FLASH_KEY1;
  FLASH->OPTKEYR = FLASH_KEY2;
  
  /* Wait for last operation to be completed */
  status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
  
  if(status == FLASH_COMPLETE)
  {  
    /* Enable the Option Bytes Programming operation */
    FLASH->CR |= FLASH_CR_OPTPG; 
           
        OB->USER = OB_BOOT1|0xEF;
  
    /* Wait for last operation to be completed */
    status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);

    if(status != FLASH_TIMEOUT)
    {
      /* if the program operation is completed, disable the OPTPG Bit */
      FLASH->CR &= ~FLASH_CR_OPTPG;
    }
  }    
  /* Return the Option Byte program Status */
  return status;
}

FLASH_Status FLASH_OB_VDDAConfig(uint8_t OB_VDDA_ANALOG)
{
  FLASH_Status status = FLASH_COMPLETE; 

  /* Check the parameters */
  assert_param(IS_OB_VDDA_ANALOG(OB_VDDA_ANALOG));

  /* Authorize the small information block programming */
  FLASH->OPTKEYR = FLASH_KEY1;
  FLASH->OPTKEYR = FLASH_KEY2;
  
  /* Wait for last operation to be completed */
  status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
  
  if(status == FLASH_COMPLETE)
  {  
    /* Enable the Option Bytes Programming operation */
    FLASH->CR |= FLASH_CR_OPTPG; 
           
        OB->USER = OB_VDDA_ANALOG |0xDF;
  
    /* Wait for last operation to be completed */
    status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);

    if(status != FLASH_TIMEOUT)
    {
      /* if the program operation is completed, disable the OPTPG Bit */
      FLASH->CR &= ~FLASH_CR_OPTPG;
    }
  }    
  /* Return the Option Byte program Status */
  return status;
}

FLASH_Status FLASH_OB_SRAMParityConfig(uint8_t OB_SRAM_Parity)
{
  FLASH_Status status = FLASH_COMPLETE; 

  /* Check the parameters */
  assert_param(IS_OB_SRAM_PARITY(OB_SRAM_Parity));

  /* Wait for last operation to be completed */
  status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
  
  if(status == FLASH_COMPLETE)
  {  
    /* Enable the Option Bytes Programming operation */
    FLASH->CR |= FLASH_CR_OPTPG; 

    OB->USER = OB_SRAM_Parity | 0xBF;
  
    /* Wait for last operation to be completed */
    status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);

    if(status != FLASH_TIMEOUT)
    {
      /* if the program operation is completed, disable the OPTPG Bit */
      FLASH->CR &= ~FLASH_CR_OPTPG;
    }
  }
  /* Return the Option Byte program Status */
  return status;
}

FLASH_Status FLASH_OB_WriteUser(uint8_t OB_USER)
{
  FLASH_Status status = FLASH_COMPLETE; 

  /* Authorize the small information block programming */
  FLASH->OPTKEYR = FLASH_KEY1;
  FLASH->OPTKEYR = FLASH_KEY2;
  
  /* Wait for last operation to be completed */
  status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
  
  if(status == FLASH_COMPLETE)
  {  
    /* Enable the Option Bytes Programming operation */
    FLASH->CR |= FLASH_CR_OPTPG; 
           
          OB->USER = OB_USER | 0x88;
  
    /* Wait for last operation to be completed */
    status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);

    if(status != FLASH_TIMEOUT)
    {
      /* if the program operation is completed, disable the OPTPG Bit */
      FLASH->CR &= ~FLASH_CR_OPTPG;
    }
  }    
  /* Return the Option Byte 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(FLASH_ER_PRG_TIMEOUT);

  if(status == FLASH_COMPLETE)
  {
    /* Enables the Option Bytes Programming operation */
    FLASH->CR |= FLASH_CR_OPTPG; 
    *(__IO uint16_t*)Address = Data;
    
    /* Wait for last operation to be completed */
    status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT);
    
    if(status != FLASH_TIMEOUT)
    {
      /* If the program operation is completed, disable the OPTPG Bit */
      FLASH->CR &= ~FLASH_CR_OPTPG;
    }
  }
  /* Return the Option Byte Data Program Status */
  return status;
}

uint8_t FLASH_OB_GetUser(void)
{
  /* Return the User Option Byte */
  return (uint8_t)(FLASH->OBR >> 8);
}

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

FlagStatus FLASH_OB_GetRDP(void)
{
  FlagStatus readstatus = RESET;
  
  if ((uint8_t)(FLASH->OBR & (FLASH_OBR_RDPRT1 | FLASH_OBR_RDPRT2)) != RESET)
  {
    readstatus = SET;
  }
  else
  {
    readstatus = RESET;
  }
  return readstatus;
}

void FLASH_ITConfig(uint32_t FLASH_IT, FunctionalState NewState)
{
  /* 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;
  }
}

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

  /* Check the parameters */
  assert_param(IS_FLASH_GET_FLAG(FLASH_FLAG));

  if((FLASH->SR & FLASH_FLAG) != (uint32_t)RESET)
  {
    bitstatus = SET;
  }
  else
  {
    bitstatus = RESET;
  }
  /* Return the new state of FLASH_FLAG (SET or RESET) */
  return bitstatus; 
}

void FLASH_ClearFlag(uint32_t FLASH_FLAG)
{
  /* Check the parameters */
  assert_param(IS_FLASH_CLEAR_FLAG(FLASH_FLAG));
  
  /* Clear the flags */
  FLASH->SR = FLASH_FLAG;
}

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 & (uint32_t)FLASH_FLAG_WRPERR)!= (uint32_t)0x00)
    { 
      FLASHstatus = FLASH_ERROR_WRP;
    }
    else 
    {
      if((FLASH->SR & (uint32_t)(FLASH_SR_PGERR)) != (uint32_t)0x00)
      {
        FLASHstatus = FLASH_ERROR_PROGRAM; 
      }
      else
      {
        FLASHstatus = FLASH_COMPLETE;
      }
    }
  }
  /* Return the FLASH Status */
  return FLASHstatus;
}

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

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