stm32f10x_flash.c
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- /******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
- * File Name : stm32f10x_flash.c
- * Author : MCD Application Team
- * Version : V2.0.2
- * Date : 07/11/2008
- * Description : This file provides all the FLASH firmware functions.
- ********************************************************************************
- * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
- * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
- * AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
- * INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
- * CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
- * INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
- *******************************************************************************/
- /* Includes ------------------------------------------------------------------*/
- #include "stm32f10x_flash.h"
- /* Private typedef -----------------------------------------------------------*/
- /* Private define ------------------------------------------------------------*/
- /* Flash Access Control Register bits */
- #define ACR_LATENCY_Mask ((u32)0x00000038)
- #define ACR_HLFCYA_Mask ((u32)0xFFFFFFF7)
- #define ACR_PRFTBE_Mask ((u32)0xFFFFFFEF)
- #ifdef _FLASH_PROG
- /* Flash Access Control Register bits */
- #define ACR_PRFTBS_Mask ((u32)0x00000020)
- /* Flash Control Register bits */
- #define CR_PG_Set ((u32)0x00000001)
- #define CR_PG_Reset ((u32)0x00001FFE)
- #define CR_PER_Set ((u32)0x00000002)
- #define CR_PER_Reset ((u32)0x00001FFD)
- #define CR_MER_Set ((u32)0x00000004)
- #define CR_MER_Reset ((u32)0x00001FFB)
- #define CR_OPTPG_Set ((u32)0x00000010)
- #define CR_OPTPG_Reset ((u32)0x00001FEF)
- #define CR_OPTER_Set ((u32)0x00000020)
- #define CR_OPTER_Reset ((u32)0x00001FDF)
- #define CR_STRT_Set ((u32)0x00000040)
-
- #define CR_LOCK_Set ((u32)0x00000080)
- /* FLASH Mask */
- #define RDPRT_Mask ((u32)0x00000002)
- #define WRP0_Mask ((u32)0x000000FF)
- #define WRP1_Mask ((u32)0x0000FF00)
- #define WRP2_Mask ((u32)0x00FF0000)
- #define WRP3_Mask ((u32)0xFF000000)
- /* FLASH Keys */
- #define RDP_Key ((u16)0x00A5)
- #define FLASH_KEY1 ((u32)0x45670123)
- #define FLASH_KEY2 ((u32)0xCDEF89AB)
- /* Delay definition */
- #define EraseTimeout ((u32)0x00000FFF)
- #define ProgramTimeout ((u32)0x0000000F)
- #endif
- /* Private macro -------------------------------------------------------------*/
- /* Private variables ---------------------------------------------------------*/
- /* Private function prototypes -----------------------------------------------*/
- #ifdef _FLASH_PROG
- static void delay(void);
- #endif
- /* Private functions ---------------------------------------------------------*/
- /*******************************************************************************
- * Function Name : FLASH_SetLatency
- * Description : Sets the code latency value.
- * Input : - FLASH_Latency: specifies the FLASH Latency value.
- * This parameter can be one of the following values:
- * - FLASH_Latency_0: FLASH Zero Latency cycle
- * - FLASH_Latency_1: FLASH One Latency cycle
- * - FLASH_Latency_2: FLASH Two Latency cycles
- * Output : None
- * Return : None
- *******************************************************************************/
- void FLASH_SetLatency(u32 FLASH_Latency)
- {
- /* Check the parameters */
- assert_param(IS_FLASH_LATENCY(FLASH_Latency));
-
- /* Sets the Latency value */
- FLASH->ACR &= ACR_LATENCY_Mask;
- FLASH->ACR |= FLASH_Latency;
- }
- /*******************************************************************************
- * Function Name : FLASH_HalfCycleAccessCmd
- * Description : Enables or disables the Half cycle flash access.
- * Input : - FLASH_HalfCycle: specifies the FLASH Half cycle Access mode.
- * This parameter can be one of the following values:
- * - FLASH_HalfCycleAccess_Enable: FLASH Half Cycle Enable
- * - FLASH_HalfCycleAccess_Disable: FLASH Half Cycle Disable
- * Output : None
- * Return : None
- *******************************************************************************/
- void FLASH_HalfCycleAccessCmd(u32 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;
- }
- /*******************************************************************************
- * Function Name : FLASH_PrefetchBufferCmd
- * Description : Enables or disables the Prefetch Buffer.
- * Input : - FLASH_PrefetchBuffer: specifies the Prefetch buffer status.
- * This parameter can be one of the following values:
- * - FLASH_PrefetchBuffer_Enable: FLASH Prefetch Buffer Enable
- * - FLASH_PrefetchBuffer_Disable: FLASH Prefetch Buffer Disable
- * Output : None
- * Return : None
- *******************************************************************************/
- void FLASH_PrefetchBufferCmd(u32 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;
- }
- #ifdef _FLASH_PROG
- /*******************************************************************************
- * Function Name : FLASH_Unlock
- * Description : Unlocks the FLASH Program Erase Controller.
- * Input : None
- * Output : None
- * Return : None
- *******************************************************************************/
- void FLASH_Unlock(void)
- {
- /* Authorize the FPEC Access */
- FLASH->KEYR = FLASH_KEY1;
- FLASH->KEYR = FLASH_KEY2;
- }
- /*******************************************************************************
- * Function Name : FLASH_Lock
- * Description : Locks the FLASH Program Erase Controller.
- * Input : None
- * Output : None
- * Return : None
- *******************************************************************************/
- void FLASH_Lock(void)
- {
- /* Set the Lock Bit to lock the FPEC and the FCR */
- FLASH->CR |= CR_LOCK_Set;
- }
- /*******************************************************************************
- * Function Name : FLASH_ErasePage
- * Description : Erases a specified FLASH page.
- * Input : - Page_Address: The page address to be erased.
- * Output : None
- * Return : FLASH Status: The returned value can be: FLASH_BUSY,
- * FLASH_ERROR_PG, FLASH_ERROR_WRP, FLASH_COMPLETE or
- * FLASH_TIMEOUT.
- *******************************************************************************/
- FLASH_Status FLASH_ErasePage(u32 Page_Address)
- {
- FLASH_Status status = FLASH_COMPLETE;
- /* Check the parameters */
- assert_param(IS_FLASH_ADDRESS(Page_Address));
- /* 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);
- if(status != FLASH_BUSY)
- {
- /* if the erase operation is completed, disable the PER Bit */
- FLASH->CR &= CR_PER_Reset;
- }
- }
- /* Return the Erase Status */
- return status;
- }
- /*******************************************************************************
- * Function Name : FLASH_EraseAllPages
- * Description : Erases all FLASH pages.
- * Input : None
- * Output : None
- * Return : FLASH Status: The returned value can be: FLASH_BUSY,
- * FLASH_ERROR_PG, FLASH_ERROR_WRP, FLASH_COMPLETE or
- * FLASH_TIMEOUT.
- *******************************************************************************/
- FLASH_Status FLASH_EraseAllPages(void)
- {
- FLASH_Status status = FLASH_COMPLETE;
- /* 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);
- if(status != FLASH_BUSY)
- {
- /* if the erase operation is completed, disable the MER Bit */
- FLASH->CR &= CR_MER_Reset;
- }
- }
- /* Return the Erase Status */
- return status;
- }
- /*******************************************************************************
- * Function Name : FLASH_EraseOptionBytes
- * Description : Erases the FLASH option bytes.
- * Input : None
- * Output : None
- * Return : FLASH Status: The returned value can be: FLASH_BUSY,
- * FLASH_ERROR_PG, FLASH_ERROR_WRP, FLASH_COMPLETE or
- * FLASH_TIMEOUT.
- *******************************************************************************/
- FLASH_Status FLASH_EraseOptionBytes(void)
- {
- FLASH_Status status = FLASH_COMPLETE;
-
- /* 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;
- /* Enable the readout access */
- OB->RDP= RDP_Key;
- /* Wait for last operation to be completed */
- status = FLASH_WaitForLastOperation(ProgramTimeout);
-
- if(status != FLASH_BUSY)
- {
- /* if the program operation is completed, disable the OPTPG Bit */
- FLASH->CR &= CR_OPTPG_Reset;
- }
- }
- else
- {
- if (status != FLASH_BUSY)
- {
- /* Disable the OPTPG Bit */
- FLASH->CR &= CR_OPTPG_Reset;
- }
- }
- }
- /* Return the erase status */
- return status;
- }
- /*******************************************************************************
- * Function Name : FLASH_ProgramWord
- * Description : Programs a word at a specified address.
- * Input : - Address: specifies the address to be programmed.
- * - Data: specifies the data to be programmed.
- * Output : None
- * Return : FLASH Status: The returned value can be: FLASH_BUSY,
- * FLASH_ERROR_PG, FLASH_ERROR_WRP, FLASH_COMPLETE or
- * FLASH_TIMEOUT.
- *******************************************************************************/
- FLASH_Status FLASH_ProgramWord(u32 Address, u32 Data)
- {
- FLASH_Status status = FLASH_COMPLETE;
- /* Check the parameters */
- assert_param(IS_FLASH_ADDRESS(Address));
- /* 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;
-
- *(vu16*)Address = (u16)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 */
- *(vu16*)(Address + 2) = Data >> 16;
-
- /* Wait for last operation to be completed */
- status = FLASH_WaitForLastOperation(ProgramTimeout);
-
- if(status != FLASH_BUSY)
- {
- /* Disable the PG Bit */
- FLASH->CR &= CR_PG_Reset;
- }
- }
- else
- {
- if (status != FLASH_BUSY)
- {
- /* Disable the PG Bit */
- FLASH->CR &= CR_PG_Reset;
- }
- }
- }
- /* Return the Program Status */
- return status;
- }
- /*******************************************************************************
- * Function Name : FLASH_ProgramHalfWord
- * Description : Programs a half word at a specified address.
- * Input : - Address: specifies the address to be programmed.
- * - Data: specifies the data to be programmed.
- * Output : None
- * Return : FLASH Status: The returned value can be: FLASH_BUSY,
- * FLASH_ERROR_PG, FLASH_ERROR_WRP, FLASH_COMPLETE or
- * FLASH_TIMEOUT.
- *******************************************************************************/
- FLASH_Status FLASH_ProgramHalfWord(u32 Address, u16 Data)
- {
- FLASH_Status status = FLASH_COMPLETE;
- /* Check the parameters */
- assert_param(IS_FLASH_ADDRESS(Address));
- /* 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;
-
- *(vu16*)Address = Data;
- /* Wait for last operation to be completed */
- status = FLASH_WaitForLastOperation(ProgramTimeout);
- if(status != FLASH_BUSY)
- {
- /* if the program operation is completed, disable the PG Bit */
- FLASH->CR &= CR_PG_Reset;
- }
- }
- /* Return the Program Status */
- return status;
- }
- /*******************************************************************************
- * Function Name : FLASH_ProgramOptionByteData
- * Description : Programs a half word at a specified Option Byte Data address.
- * Input : - Address: specifies the address to be programmed.
- * This parameter can be 0x1FFFF804 or 0x1FFFF806.
- * - Data: specifies the data to be programmed.
- * Output : None
- * Return : FLASH Status: The returned value can be: FLASH_BUSY,
- * FLASH_ERROR_PG, FLASH_ERROR_WRP, FLASH_COMPLETE or
- * FLASH_TIMEOUT.
- *******************************************************************************/
- FLASH_Status FLASH_ProgramOptionByteData(u32 Address, u8 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;
- *(vu16*)Address = Data;
-
- /* Wait for last operation to be completed */
- status = FLASH_WaitForLastOperation(ProgramTimeout);
- if(status != FLASH_BUSY)
- {
- /* if the program operation is completed, disable the OPTPG Bit */
- FLASH->CR &= CR_OPTPG_Reset;
- }
- }
- /* Return the Option Byte Data Program Status */
- return status;
- }
- /*******************************************************************************
- * Function Name : FLASH_EnableWriteProtection
- * Description : Write protects the desired pages
- * Input : - FLASH_Pages: specifies the address of the pages to be
- * write protected. This parameter can be:
- * - For STM32F10Xxx Medium-density devices (FLASH page size equal to 1 KB)
- * - A value between FLASH_WRProt_Pages0to3 and
- * FLASH_WRProt_Pages124to127
- * - For STM32F10Xxx High-density devices (FLASH page size equal to 2 KB)
- * - A value between FLASH_WRProt_Pages0to1 and
- * FLASH_WRProt_Pages60to61 or FLASH_WRProt_Pages62to255
- * - FLASH_WRProt_AllPages
- * Output : None
- * Return : FLASH Status: The returned value can be: FLASH_BUSY,
- * FLASH_ERROR_PG, FLASH_ERROR_WRP, FLASH_COMPLETE or
- * FLASH_TIMEOUT.
- *******************************************************************************/
- FLASH_Status FLASH_EnableWriteProtection(u32 FLASH_Pages)
- {
- u16 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 = (u32)(~FLASH_Pages);
- WRP0_Data = (vu16)(FLASH_Pages & WRP0_Mask);
- WRP1_Data = (vu16)((FLASH_Pages & WRP1_Mask) >> 8);
- WRP2_Data = (vu16)((FLASH_Pages & WRP2_Mask) >> 16);
- WRP3_Data = (vu16)((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_BUSY)
- {
- /* if the program operation is completed, disable the OPTPG Bit */
- FLASH->CR &= CR_OPTPG_Reset;
- }
- }
- /* Return the write protection operation Status */
- return status;
- }
- /*******************************************************************************
- * Function Name : FLASH_ReadOutProtection
- * Description : Enables or disables the read out protection.
- * If the user has already programmed the other option bytes before
- * calling this function, he must re-program them since this
- * function erases all option bytes.
- * Input : - Newstate: new state of the ReadOut Protection.
- * This parameter can be: ENABLE or DISABLE.
- * Output : None
- * Return : FLASH Status: The returned value can be: FLASH_BUSY,
- * FLASH_ERROR_PG, FLASH_ERROR_WRP, FLASH_COMPLETE or
- * FLASH_TIMEOUT.
- *******************************************************************************/
- 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_BUSY)
- {
- /* if the program operation is completed, disable the OPTPG Bit */
- FLASH->CR &= CR_OPTPG_Reset;
- }
- }
- else
- {
- if(status != FLASH_BUSY)
- {
- /* Disable the OPTER Bit */
- FLASH->CR &= CR_OPTER_Reset;
- }
- }
- }
- /* Return the protection operation Status */
- return status;
- }
-
- /*******************************************************************************
- * Function Name : FLASH_UserOptionByteConfig
- * Description : Programs the FLASH User Option Byte: IWDG_SW / RST_STOP /
- * RST_STDBY.
- * Input : - OB_IWDG: Selects the IWDG mode
- * This parameter can be one of the following values:
- * - OB_IWDG_SW: Software IWDG selected
- * - OB_IWDG_HW: Hardware IWDG selected
- * - OB_STOP: Reset event when entering STOP mode.
- * This parameter can be one of the following values:
- * - OB_STOP_NoRST: No reset generated when entering in STOP
- * - OB_STOP_RST: Reset generated when entering in STOP
- * - OB_STDBY: Reset event when entering Standby mode.
- * This parameter can be one of the following values:
- * - OB_STDBY_NoRST: No reset generated when entering in STANDBY
- * - OB_STDBY_RST: Reset generated when entering in STANDBY
- * Output : None
- * Return : FLASH Status: The returned value can be: FLASH_BUSY,
- * FLASH_ERROR_PG, FLASH_ERROR_WRP, FLASH_COMPLETE or
- * FLASH_TIMEOUT.
- *******************************************************************************/
- FLASH_Status FLASH_UserOptionByteConfig(u16 OB_IWDG, u16 OB_STOP, u16 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 | OB_STOP |OB_STDBY) | (u16)0xF8;
-
- /* Wait for last operation to be completed */
- status = FLASH_WaitForLastOperation(ProgramTimeout);
- if(status != FLASH_BUSY)
- {
- /* if the program operation is completed, disable the OPTPG Bit */
- FLASH->CR &= CR_OPTPG_Reset;
- }
- }
- /* Return the Option Byte program Status */
- return status;
- }
- /*******************************************************************************
- * Function Name : FLASH_GetUserOptionByte
- * Description : Returns the FLASH User Option Bytes values.
- * Input : None
- * Output : None
- * Return : The FLASH User Option Bytes values:IWDG_SW(Bit0), RST_STOP(Bit1)
- * and RST_STDBY(Bit2).
- *******************************************************************************/
- u32 FLASH_GetUserOptionByte(void)
- {
- /* Return the User Option Byte */
- return (u32)(FLASH->OBR >> 2);
- }
- /*******************************************************************************
- * Function Name : FLASH_GetWriteProtectionOptionByte
- * Description : Returns the FLASH Write Protection Option Bytes Register value.
- * Input : None
- * Output : None
- * Return : The FLASH Write Protection Option Bytes Register value
- *******************************************************************************/
- u32 FLASH_GetWriteProtectionOptionByte(void)
- {
- /* Return the Falsh write protection Register value */
- return (u32)(FLASH->WRPR);
- }
- /*******************************************************************************
- * Function Name : FLASH_GetReadOutProtectionStatus
- * Description : Checks whether the FLASH Read Out Protection Status is set
- * or not.
- * Input : None
- * Output : None
- * Return : FLASH ReadOut Protection Status(SET or RESET)
- *******************************************************************************/
- FlagStatus FLASH_GetReadOutProtectionStatus(void)
- {
- FlagStatus readoutstatus = RESET;
- if ((FLASH->OBR & RDPRT_Mask) != (u32)RESET)
- {
- readoutstatus = SET;
- }
- else
- {
- readoutstatus = RESET;
- }
- return readoutstatus;
- }
- /*******************************************************************************
- * Function Name : FLASH_GetPrefetchBufferStatus
- * Description : Checks whether the FLASH Prefetch Buffer status is set or not.
- * Input : None
- * Output : None
- * Return : FLASH Prefetch Buffer Status (SET or RESET).
- *******************************************************************************/
- FlagStatus FLASH_GetPrefetchBufferStatus(void)
- {
- FlagStatus bitstatus = RESET;
-
- if ((FLASH->ACR & ACR_PRFTBS_Mask) != (u32)RESET)
- {
- bitstatus = SET;
- }
- else
- {
- bitstatus = RESET;
- }
- /* Return the new state of FLASH Prefetch Buffer Status (SET or RESET) */
- return bitstatus;
- }
- /*******************************************************************************
- * Function Name : FLASH_ITConfig
- * Description : Enables or disables the specified FLASH interrupts.
- * Input : - FLASH_IT: specifies the FLASH interrupt sources to be
- * enabled or disabled.
- * This parameter can be any combination of the following values:
- * - FLASH_IT_ERROR: FLASH Error Interrupt
- * - FLASH_IT_EOP: FLASH end of operation Interrupt
- * Output : None
- * Return : None
- *******************************************************************************/
- void FLASH_ITConfig(u16 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 &= ~(u32)FLASH_IT;
- }
- }
- /*******************************************************************************
- * Function Name : FLASH_GetFlagStatus
- * Description : Checks whether the specified FLASH flag is set or not.
- * Input : - FLASH_FLAG: specifies the FLASH flag to check.
- * This parameter can be one of the following values:
- * - FLASH_FLAG_BSY: FLASH Busy flag
- * - FLASH_FLAG_PGERR: FLASH Program error flag
- * - FLASH_FLAG_WRPRTERR: FLASH Write protected error flag
- * - FLASH_FLAG_EOP: FLASH End of Operation flag
- * - FLASH_FLAG_OPTERR: FLASH Option Byte error flag
- * Output : None
- * Return : The new state of FLASH_FLAG (SET or RESET).
- *******************************************************************************/
- FlagStatus FLASH_GetFlagStatus(u16 FLASH_FLAG)
- {
- FlagStatus bitstatus = RESET;
- /* Check the parameters */
- assert_param(IS_FLASH_GET_FLAG(FLASH_FLAG)) ;
- if(FLASH_FLAG == FLASH_FLAG_OPTERR)
- {
- if((FLASH->OBR & FLASH_FLAG_OPTERR) != (u32)RESET)
- {
- bitstatus = SET;
- }
- else
- {
- bitstatus = RESET;
- }
- }
- else
- {
- if((FLASH->SR & FLASH_FLAG) != (u32)RESET)
- {
- bitstatus = SET;
- }
- else
- {
- bitstatus = RESET;
- }
- }
- /* Return the new state of FLASH_FLAG (SET or RESET) */
- return bitstatus;
- }
- /*******************************************************************************
- * Function Name : FLASH_ClearFlag
- * Description : Clears the FLASH抯 pending flags.
- * Input : - FLASH_FLAG: specifies the FLASH flags to clear.
- * This parameter can be any combination of the following values:
- * - FLASH_FLAG_BSY: FLASH Busy flag
- * - FLASH_FLAG_PGERR: FLASH Program error flag
- * - FLASH_FLAG_WRPRTERR: FLASH Write protected error flag
- * - FLASH_FLAG_EOP: FLASH End of Operation flag
- * Output : None
- * Return : None
- *******************************************************************************/
- void FLASH_ClearFlag(u16 FLASH_FLAG)
- {
- /* Check the parameters */
- assert_param(IS_FLASH_CLEAR_FLAG(FLASH_FLAG)) ;
-
- /* Clear the flags */
- FLASH->SR = FLASH_FLAG;
- }
- /*******************************************************************************
- * Function Name : FLASH_GetStatus
- * Description : Returns the FLASH Status.
- * Input : None
- * Output : None
- * Return : FLASH Status: The returned value can be: FLASH_BUSY,
- * FLASH_ERROR_PG, FLASH_ERROR_WRP or FLASH_COMPLETE
- *******************************************************************************/
- 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)
- {
- flashstatus = FLASH_ERROR_PG;
- }
- else
- {
- if(FLASH->SR & FLASH_FLAG_WRPRTERR)
- {
- flashstatus = FLASH_ERROR_WRP;
- }
- else
- {
- flashstatus = FLASH_COMPLETE;
- }
- }
- }
- /* Return the Flash Status */
- return flashstatus;
- }
- /*******************************************************************************
- * Function Name : FLASH_WaitForLastOperation
- * Description : Waits for a Flash operation to complete or a TIMEOUT to occur.
- * Input : - Timeout: FLASH progamming Timeout
- * Output : None
- * Return : FLASH Status: The returned value can be: FLASH_BUSY,
- * FLASH_ERROR_PG, FLASH_ERROR_WRP, FLASH_COMPLETE or
- * FLASH_TIMEOUT.
- *******************************************************************************/
- FLASH_Status FLASH_WaitForLastOperation(u32 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))
- {
- delay();
- status = FLASH_GetStatus();
- Timeout--;
- }
- if(Timeout == 0x00 )
- {
- status = FLASH_TIMEOUT;
- }
- /* Return the operation status */
- return status;
- }
- /*******************************************************************************
- * Function Name : delay
- * Description : Inserts a time delay.
- * Input : None
- * Output : None
- * Return : None
- *******************************************************************************/
- static void delay(void)
- {
- vu32 i = 0;
- for(i = 0xFF; i != 0; i--)
- {
- }
- }
- #endif
- /******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/