/** | |
****************************************************************************** | |
* @file stm32f10x_flash.c | |
* @author MCD Application Team | |
* @version V3.0.0 | |
* @date 04/06/2009 | |
* @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 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_BUSY) | |
{ | |
/* 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_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; | |
} | |
/** | |
* @brief Erases the FLASH option bytes. | |
* @param None | |
* @retval : 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; | |
} | |
/** | |
* @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_BUSY, | |
* 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; | |
/* 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 */ | |
*(__IO uint16_t*)(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; | |
} | |
/** | |
* @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_BUSY, | |
* 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_BUSY) | |
{ | |
/* 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_BUSY, | |
* 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_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; | |
} | |
/** | |
* @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 STM32F10Xxx Medium-density devices (FLASH page size equal to 1 KB) | |
* A value between FLASH_WRProt_Pages0to3 and FLASH_WRProt_Pages124to127 | |
* @arg 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 | |
* @arg FLASH_WRProt_AllPages | |
* @retval : FLASH Status: The returned value can be: FLASH_BUSY, | |
* 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_BUSY) | |
{ | |
/* 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. | |
* 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_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; | |
} | |
/** | |
* @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_BUSY, | |
* 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 | OB_STOP |OB_STDBY) | (uint16_t)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; | |
} | |
/** | |
* @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 FLASHs pending flags. | |
* @param FLASH_FLAG: specifies the FLASH flags to clear. | |
* This parameter can be any combination 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 | |
* @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) | |
{ | |
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; | |
} | |
/** | |
* @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_BUSY, | |
* 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****/ |