diff options
Diffstat (limited to 'demos/ARMCM3-STM32F103-GCC/stm32lib/src/stm32f10x_flash.c')
| -rw-r--r-- | demos/ARMCM3-STM32F103-GCC/stm32lib/src/stm32f10x_flash.c | 874 |
1 files changed, 874 insertions, 0 deletions
diff --git a/demos/ARMCM3-STM32F103-GCC/stm32lib/src/stm32f10x_flash.c b/demos/ARMCM3-STM32F103-GCC/stm32lib/src/stm32f10x_flash.c new file mode 100644 index 000000000..22ee18000 --- /dev/null +++ b/demos/ARMCM3-STM32F103-GCC/stm32lib/src/stm32f10x_flash.c @@ -0,0 +1,874 @@ +/**
+ ******************************************************************************
+ * @file stm32f10x_flash.c
+ * @author MCD Application Team
+ * @version V3.1.0
+ * @date 06/19/2009
+ * @brief This file provides all the FLASH firmware functions.
+ ******************************************************************************
+ * @copy
+ *
+ * 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.
+ *
+ * <h2><center>© COPYRIGHT 2009 STMicroelectronics</center></h2>
+ */
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32f10x_flash.h"
+
+/** @addtogroup STM32F10x_StdPeriph_Driver
+ * @{
+ */
+
+/** @defgroup FLASH
+ * @brief FLASH driver modules
+ * @{
+ */
+
+/** @defgroup FLASH_Private_TypesDefinitions
+ * @{
+ */
+
+/**
+ * @}
+ */
+
+/** @defgroup FLASH_Private_Defines
+ * @{
+ */
+
+/* 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)
+
+/* FLASH Keys */
+#define RDP_Key ((uint16_t)0x00A5)
+#define FLASH_KEY1 ((uint32_t)0x45670123)
+#define FLASH_KEY2 ((uint32_t)0xCDEF89AB)
+
+/* Delay definition */
+#define EraseTimeout ((uint32_t)0x00000FFF)
+#define ProgramTimeout ((uint32_t)0x0000000F)
+
+/**
+ * @}
+ */
+
+/** @defgroup FLASH_Private_Macros
+ * @{
+ */
+
+/**
+ * @}
+ */
+
+/** @defgroup FLASH_Private_Variables
+ * @{
+ */
+
+/**
+ * @}
+ */
+
+/** @defgroup FLASH_Private_FunctionPrototypes
+ * @{
+ */
+
+static void delay(void);
+/**
+ * @}
+ */
+
+/** @defgroup FLASH_Private_Functions
+ * @{
+ */
+
+/**
+ * @brief Sets the code latency value.
+ * @param FLASH_Latency: specifies the FLASH Latency value.
+ * This parameter can be one of the following values:
+ * @arg FLASH_Latency_0: FLASH Zero Latency cycle
+ * @arg FLASH_Latency_1: FLASH One Latency cycle
+ * @arg FLASH_Latency_2: FLASH Two Latency cycles
+ * @retval None
+ */
+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;
+}
+
+/**
+ * @brief Enables or disables the Half cycle flash access.
+ * @param FLASH_HalfCycleAccess: specifies the FLASH Half cycle Access mode.
+ * This parameter can be one of the following values:
+ * @arg FLASH_HalfCycleAccess_Enable: FLASH Half Cycle Enable
+ * @arg FLASH_HalfCycleAccess_Disable: FLASH Half Cycle Disable
+ * @retval None
+ */
+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;
+}
+
+/**
+ * @brief Enables or disables the Prefetch Buffer.
+ * @param FLASH_PrefetchBuffer: specifies the Prefetch buffer status.
+ * This parameter can be one of the following values:
+ * @arg FLASH_PrefetchBuffer_Enable: FLASH Prefetch Buffer Enable
+ * @arg FLASH_PrefetchBuffer_Disable: FLASH Prefetch Buffer Disable
+ * @retval None
+ */
+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;
+}
+
+/**
+ * @brief Unlocks the FLASH Program Erase Controller.
+ * @param None
+ * @retval None
+ */
+void FLASH_Unlock(void)
+{
+ /* Authorize the FPEC Access */
+ FLASH->KEYR = FLASH_KEY1;
+ FLASH->KEYR = FLASH_KEY2;
+}
+
+/**
+ * @brief Locks the FLASH Program Erase Controller.
+ * @param None
+ * @retval None
+ */
+void FLASH_Lock(void)
+{
+ /* Set the Lock Bit to lock the FPEC and the FCR */
+ FLASH->CR |= CR_LOCK_Set;
+}
+
+/**
+ * @brief Erases a specified FLASH page.
+ * @param Page_Address: The page address to be erased.
+ * @retval FLASH Status: The returned value can be: FLASH_BUSY, FLASH_ERROR_PG,
+ * FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
+ */
+FLASH_Status FLASH_ErasePage(uint32_t Page_Address)
+{
+ FLASH_Status status = FLASH_COMPLETE;
+ /* Check the parameters */
+ assert_param(IS_FLASH_ADDRESS(Page_Address));
+ /* 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_TIMEOUT)
+ {
+ /* if the erase operation is completed, disable the PER Bit */
+ FLASH->CR &= CR_PER_Reset;
+ }
+ }
+ /* Return the Erase Status */
+ return status;
+}
+
+/**
+ * @brief Erases all FLASH pages.
+ * @param None
+ * @retval FLASH Status: The returned value can be: FLASH_ERROR_PG,
+ * FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
+ */
+FLASH_Status FLASH_EraseAllPages(void)
+{
+ FLASH_Status status = FLASH_COMPLETE;
+ /* 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_TIMEOUT)
+ {
+ /* if the erase operation is completed, disable the MER Bit */
+ FLASH->CR &= CR_MER_Reset;
+ }
+ }
+ /* Return the Erase Status */
+ return status;
+}
+
+/**
+ * @brief Erases the FLASH option bytes.
+ * @param None
+ * @retval FLASH Status: The returned value can be: FLASH_ERROR_PG,
+ * FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
+ */
+FLASH_Status FLASH_EraseOptionBytes(void)
+{
+ 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_TIMEOUT)
+ {
+ /* if the program operation is completed, disable the OPTPG Bit */
+ FLASH->CR &= CR_OPTPG_Reset;
+ }
+ }
+ else
+ {
+ if (status != FLASH_TIMEOUT)
+ {
+ /* Disable the OPTPG Bit */
+ FLASH->CR &= CR_OPTPG_Reset;
+ }
+ }
+ }
+ /* Return the erase status */
+ return status;
+}
+
+/**
+ * @brief Programs a word at a specified address.
+ * @param Address: specifies the address to be programmed.
+ * @param Data: specifies the data to be programmed.
+ * @retval FLASH Status: The returned value can be: FLASH_ERROR_PG,
+ * FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
+ */
+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));
+ /* 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);
+
+ if(status != FLASH_TIMEOUT)
+ {
+ /* Disable the PG Bit */
+ FLASH->CR &= CR_PG_Reset;
+ }
+ }
+ else
+ {
+ if (status != FLASH_TIMEOUT)
+ {
+ /* Disable the PG Bit */
+ FLASH->CR &= CR_PG_Reset;
+ }
+ }
+ }
+ /* Return the Program Status */
+ return status;
+}
+
+/**
+ * @brief Programs a half word at a specified address.
+ * @param Address: specifies the address to be programmed.
+ * @param Data: specifies the data to be programmed.
+ * @retval FLASH Status: The returned value can be: FLASH_ERROR_PG,
+ * FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
+ */
+FLASH_Status FLASH_ProgramHalfWord(uint32_t Address, uint16_t 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;
+
+ *(__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 PG Bit */
+ FLASH->CR &= CR_PG_Reset;
+ }
+ }
+ /* Return the Program Status */
+ return status;
+}
+
+/**
+ * @brief Programs a half word at a specified Option Byte Data address.
+ * @param Address: specifies the address to be programmed.
+ * This parameter can be 0x1FFFF804 or 0x1FFFF806.
+ * @param Data: specifies the data to be programmed.
+ * @retval FLASH Status: The returned value can be: FLASH_ERROR_PG,
+ * FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
+ */
+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;
+}
+
+/**
+ * @brief Write protects the desired pages
+ * @param FLASH_Pages: specifies the address of the pages to be write protected.
+ * This parameter can be:
+ * @arg For @b STM32_Low-density_devices: value between FLASH_WRProt_Pages0to3 and FLASH_WRProt_Pages28to31
+ * @arg For @b STM32_Medium-density_devices: value between FLASH_WRProt_Pages0to3
+ * and FLASH_WRProt_Pages124to127
+ * @arg For @b STM32_High-density_devices: value between FLASH_WRProt_Pages0to1 and
+ * FLASH_WRProt_Pages60to61 or FLASH_WRProt_Pages62to255
+ * @arg For @b STM32_Connectivity_line_devices: value between FLASH_WRProt_Pages0to1 and
+ * FLASH_WRProt_Pages60to61 or FLASH_WRProt_Pages62to127
+ * @arg FLASH_WRProt_AllPages
+ * @retval FLASH Status: The returned value can be: FLASH_ERROR_PG,
+ * FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
+ */
+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;
+}
+
+/**
+ * @brief Enables or disables the read out protection.
+ * @note 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.
+ * @param Newstate: new state of the ReadOut Protection.
+ * This parameter can be: ENABLE or DISABLE.
+ * @retval FLASH Status: The returned value can be: 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_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;
+}
+
+/**
+ * @brief Programs the FLASH User Option Byte: IWDG_SW / RST_STOP / RST_STDBY.
+ * @param OB_IWDG: Selects the IWDG mode
+ * This parameter can be one of the following values:
+ * @arg OB_IWDG_SW: Software IWDG selected
+ * @arg OB_IWDG_HW: Hardware IWDG selected
+ * @param OB_STOP: Reset event when entering STOP mode.
+ * This parameter can be one of the following values:
+ * @arg OB_STOP_NoRST: No reset generated when entering in STOP
+ * @arg OB_STOP_RST: Reset generated when entering in STOP
+ * @param OB_STDBY: Reset event when entering Standby mode.
+ * This parameter can be one of the following values:
+ * @arg OB_STDBY_NoRST: No reset generated when entering in STANDBY
+ * @arg OB_STDBY_RST: Reset generated when entering in STANDBY
+ * @retval FLASH Status: The returned value can be: FLASH_ERROR_PG,
+ * FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
+ */
+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;
+}
+
+/**
+ * @brief Returns the FLASH User Option Bytes values.
+ * @param None
+ * @retval The FLASH User Option Bytes values:IWDG_SW(Bit0), RST_STOP(Bit1)
+ * and RST_STDBY(Bit2).
+ */
+uint32_t FLASH_GetUserOptionByte(void)
+{
+ /* Return the User Option Byte */
+ return (uint32_t)(FLASH->OBR >> 2);
+}
+
+/**
+ * @brief Returns the FLASH Write Protection Option Bytes Register value.
+ * @param None
+ * @retval The FLASH Write Protection Option Bytes Register value
+ */
+uint32_t FLASH_GetWriteProtectionOptionByte(void)
+{
+ /* Return the Falsh write protection Register value */
+ return (uint32_t)(FLASH->WRPR);
+}
+
+/**
+ * @brief Checks whether the FLASH Read Out Protection Status is set or not.
+ * @param None
+ * @retval FLASH ReadOut Protection Status(SET or RESET)
+ */
+FlagStatus FLASH_GetReadOutProtectionStatus(void)
+{
+ FlagStatus readoutstatus = RESET;
+ if ((FLASH->OBR & RDPRT_Mask) != (uint32_t)RESET)
+ {
+ readoutstatus = SET;
+ }
+ else
+ {
+ readoutstatus = RESET;
+ }
+ return readoutstatus;
+}
+
+/**
+ * @brief Checks whether the FLASH Prefetch Buffer status is set or not.
+ * @param None
+ * @retval FLASH Prefetch Buffer Status (SET or RESET).
+ */
+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;
+}
+
+/**
+ * @brief Enables or disables the specified FLASH interrupts.
+ * @param FLASH_IT: specifies the FLASH interrupt sources to be enabled or disabled.
+ * This parameter can be any combination of the following values:
+ * @arg FLASH_IT_ERROR: FLASH Error Interrupt
+ * @arg FLASH_IT_EOP: FLASH end of operation Interrupt
+ * @param NewState: new state of the specified Flash interrupts.
+ * This parameter can be: ENABLE or DISABLE.
+ * @retval None
+ */
+void FLASH_ITConfig(uint16_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;
+ }
+}
+
+/**
+ * @brief Checks whether the specified FLASH flag is set or not.
+ * @param FLASH_FLAG: specifies the FLASH flag to check.
+ * This parameter can be one of the following values:
+ * @arg FLASH_FLAG_BSY: FLASH Busy flag
+ * @arg FLASH_FLAG_PGERR: FLASH Program error flag
+ * @arg FLASH_FLAG_WRPRTERR: FLASH Write protected error flag
+ * @arg FLASH_FLAG_EOP: FLASH End of Operation flag
+ * @arg FLASH_FLAG_OPTERR: FLASH Option Byte error flag
+ * @retval The new state of FLASH_FLAG (SET or RESET).
+ */
+FlagStatus FLASH_GetFlagStatus(uint16_t 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) != (uint32_t)RESET)
+ {
+ bitstatus = SET;
+ }
+ else
+ {
+ bitstatus = RESET;
+ }
+ }
+ else
+ {
+ 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;
+}
+
+/**
+ * @brief Clears the FLASH’s pending flags.
+ * @param FLASH_FLAG: specifies the FLASH flags to clear.
+ * This parameter can be any combination of the following values:
+ * @arg FLASH_FLAG_PGERR: FLASH Program error flag
+ * @arg FLASH_FLAG_WRPRTERR: FLASH Write protected error flag
+ * @arg FLASH_FLAG_EOP: FLASH End of Operation flag
+ * @retval None
+ */
+void FLASH_ClearFlag(uint16_t FLASH_FLAG)
+{
+ /* Check the parameters */
+ assert_param(IS_FLASH_CLEAR_FLAG(FLASH_FLAG)) ;
+
+ /* Clear the flags */
+ FLASH->SR = FLASH_FLAG;
+}
+
+/**
+ * @brief Returns the FLASH Status.
+ * @param None
+ * @retval 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) != 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;
+}
+
+/**
+ * @brief Waits for a Flash operation to complete or a TIMEOUT to occur.
+ * @param Timeout: FLASH progamming Timeout
+ * @retval FLASH Status: The returned value can be: FLASH_ERROR_PG,
+ * FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
+ */
+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))
+ {
+ delay();
+ status = FLASH_GetStatus();
+ Timeout--;
+ }
+ if(Timeout == 0x00 )
+ {
+ status = FLASH_TIMEOUT;
+ }
+ /* Return the operation status */
+ return status;
+}
+
+/**
+ * @brief Inserts a time delay.
+ * @param None
+ * @retval None
+ */
+static void delay(void)
+{
+ __IO uint32_t i = 0;
+ for(i = 0xFF; i != 0; i--)
+ {
+ }
+}
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/******************* (C) COPYRIGHT 2009 STMicroelectronics *****END OF FILE****/
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