diff options
Diffstat (limited to 'stm32lib/src/stm32f10x_flash.c')
| -rw-r--r-- | stm32lib/src/stm32f10x_flash.c | 916 |
1 files changed, 916 insertions, 0 deletions
diff --git a/stm32lib/src/stm32f10x_flash.c b/stm32lib/src/stm32f10x_flash.c new file mode 100644 index 0000000..66952f2 --- /dev/null +++ b/stm32lib/src/stm32f10x_flash.c @@ -0,0 +1,916 @@ +/******************** (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"
+void test(u32 x) {
+ int y;
+ x = 1;
+ y = x;
+}
+/* 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’s 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****/
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