/** | |
****************************************************************************** | |
* @file stm32f0xx_flash.c | |
* @author MCD Application Team | |
* @version V1.0.0RC1 | |
* @date 27-January-2012 | |
* @brief This file provides firmware functions to manage the following | |
* functionalities of the FLASH peripheral: | |
* - FLASH Interface configuration | |
* - FLASH Memory Programming | |
* - Option Bytes Programming | |
* - Interrupts and flags management | |
* | |
* @verbatim | |
=============================================================================== | |
##### How to use this driver ##### | |
=============================================================================== | |
[..] This driver provides functions to configure and program the Flash | |
memory of all STM32F0xx devices. These functions are split in 4 groups | |
(#) FLASH Interface configuration functions: this group includes the | |
management of following features: | |
(++) Set the latency | |
(++) Enable/Disable the prefetch buffer | |
(#) FLASH Memory Programming functions: this group includes all needed | |
functions to erase and program the main memory: | |
(++) Lock and Unlock the Flash interface. | |
(++) Erase function: Erase Page, erase all pages. | |
(++) Program functions: Half Word and Word write. | |
(#) FLASH Option Bytes Programming functions: this group includes all | |
needed functions to: | |
(++) Lock and Unlock the Flash Option bytes. | |
(++) Launch the Option Bytes loader | |
(++) Erase the Option Bytes | |
(++)Set/Reset the write protection | |
(++) Set the Read protection Level | |
(++) Program the user option Bytes | |
(++) Set/Reset the BOOT1 bit | |
(++) Enable/Disable the VDDA Analog Monitoring | |
(++) Get the user option bytes | |
(++) Get the Write protection | |
(++) Get the read protection status | |
(#) FLASH Interrupts and flag management functions: this group includes | |
all needed functions to: | |
(++) Enable/Disable the flash interrupt sources | |
(++) Get flags status | |
(++) Clear flags | |
(++) Get Flash operation status | |
(++) Wait for last flash operation | |
@endverbatim | |
****************************************************************************** | |
* @attention | |
* | |
* 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. | |
* | |
* FOR MORE INFORMATION PLEASE READ CAREFULLY THE LICENSE AGREEMENT FILE | |
* LOCATED IN THE ROOT DIRECTORY OF THIS FIRMWARE PACKAGE. | |
* | |
* <h2><center>© COPYRIGHT 2012 STMicroelectronics</center></h2> | |
****************************************************************************** | |
*/ | |
/* Includes ------------------------------------------------------------------*/ | |
#include "stm32f0xx_flash.h" | |
/** @addtogroup STM32F0xx_StdPeriph_Driver | |
* @{ | |
*/ | |
/** @defgroup FLASH | |
* @brief FLASH driver modules | |
* @{ | |
*/ | |
/* Private typedef -----------------------------------------------------------*/ | |
/* Private define ------------------------------------------------------------*/ | |
/* Private macro -------------------------------------------------------------*/ | |
/* Private variables ---------------------------------------------------------*/ | |
/* Private function prototypes -----------------------------------------------*/ | |
/* Private functions ---------------------------------------------------------*/ | |
/** @defgroup FLASH_Private_Functions | |
* @{ | |
*/ | |
/** @defgroup FLASH_Group1 FLASH Interface configuration functions | |
* @brief FLASH Interface configuration functions | |
* | |
@verbatim | |
=============================================================================== | |
##### FLASH Interface configuration functions ##### | |
=============================================================================== | |
[..] FLASH_Interface configuration_Functions, includes the following functions: | |
(+) void FLASH_SetLatency(uint32_t FLASH_Latency): | |
[..] To correctly read data from Flash memory, the number of wait states (LATENCY) | |
must be correctly programmed according to the frequency of the CPU clock (HCLK) | |
[..] | |
+--------------------------------------------- + | |
| Wait states | HCLK clock frequency (MHz) | | |
|---------------|------------------------------| | |
|0WS(1CPU cycle)| 0 < HCLK <= 24 | | |
|---------------|------------------------------| | |
|1WS(2CPU cycle)| 24 < HCLK <= 48 | | |
+----------------------------------------------+ | |
[..] | |
(+) void FLASH_PrefetchBufferCmd(FunctionalState NewState); | |
[..] | |
All these functions don't need the unlock sequence. | |
@endverbatim | |
* @{ | |
*/ | |
/** | |
* @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 | |
* @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 &= (uint32_t) (~((uint32_t)FLASH_ACR_LATENCY)); | |
tmpreg |= FLASH_Latency; | |
/* Write the ACR register */ | |
FLASH->ACR = tmpreg; | |
} | |
/** | |
* @brief Enables or disables the Prefetch Buffer. | |
* @param NewState: new state of the FLASH prefetch buffer. | |
* This parameter can be: ENABLE or DISABLE. | |
* @retval None | |
*/ | |
void FLASH_PrefetchBufferCmd(FunctionalState NewState) | |
{ | |
/* Check the parameters */ | |
assert_param(IS_FUNCTIONAL_STATE(NewState)); | |
if(NewState != DISABLE) | |
{ | |
FLASH->ACR |= FLASH_ACR_PRFTBE; | |
} | |
else | |
{ | |
FLASH->ACR &= (uint32_t)(~((uint32_t)FLASH_ACR_PRFTBE)); | |
} | |
} | |
/** | |
* @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 & FLASH_ACR_PRFTBS) != (uint32_t)RESET) | |
{ | |
bitstatus = SET; | |
} | |
else | |
{ | |
bitstatus = RESET; | |
} | |
/* Return the new state of FLASH Prefetch Buffer Status (SET or RESET) */ | |
return bitstatus; | |
} | |
/** | |
* @} | |
*/ | |
/** @defgroup FLASH_Group2 FLASH Memory Programming functions | |
* @brief FLASH Memory Programming functions | |
* | |
@verbatim | |
=============================================================================== | |
##### FLASH Memory Programming functions ##### | |
=============================================================================== | |
[..] The FLASH Memory Programming functions, includes the following functions: | |
(+) void FLASH_Unlock(void); | |
(+) void FLASH_Lock(void); | |
(+) FLASH_Status FLASH_ErasePage(uint32_t Page_Address); | |
(+) FLASH_Status FLASH_EraseAllPages(void); | |
(+) FLASH_Status FLASH_ProgramWord(uint32_t Address, uint32_t Data); | |
(+) FLASH_Status FLASH_ProgramHalfWord(uint32_t Address, uint16_t Data); | |
[..] Any operation of erase or program should follow these steps: | |
(#) Call the FLASH_Unlock() function to enable the flash control register and | |
program memory access | |
(#) Call the desired function to erase page or program data | |
(#) Call the FLASH_Lock() to disable the flash program memory access | |
(recommended to protect the FLASH memory against possible unwanted operation) | |
@endverbatim | |
* @{ | |
*/ | |
/** | |
* @brief Unlocks the FLASH control register and program memory access. | |
* @param None | |
* @retval None | |
*/ | |
void FLASH_Unlock(void) | |
{ | |
if((FLASH->CR & FLASH_CR_LOCK) != RESET) | |
{ | |
/* Unlocking the program memory access */ | |
FLASH->KEYR = FLASH_FKEY1; | |
FLASH->KEYR = FLASH_FKEY2; | |
} | |
} | |
/** | |
* @brief Locks the Program memory access. | |
* @param None | |
* @retval None | |
*/ | |
void FLASH_Lock(void) | |
{ | |
/* Set the LOCK Bit to lock the FLASH control register and program memory access */ | |
FLASH->CR |= FLASH_CR_LOCK; | |
} | |
/** | |
* @brief Erases a specified page in program memory. | |
* @note To correctly run this function, the FLASH_Unlock() function | |
* must be called before. | |
* Call the FLASH_Lock() to disable the flash memory access | |
* (recommended to protect the FLASH memory against possible unwanted operation) | |
* @param Page_Address: The page address in program memory to be erased. | |
* @note A Page is erased in the Program memory only if the address to load | |
* is the start address of a page (multiple of 1024 bytes). | |
* @retval FLASH Status: The returned value can be: | |
* FLASH_ERROR_PROGRAM, 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_PROGRAM_ADDRESS(Page_Address)); | |
/* Wait for last operation to be completed */ | |
status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT); | |
if(status == FLASH_COMPLETE) | |
{ | |
/* If the previous operation is completed, proceed to erase the page */ | |
FLASH->CR |= FLASH_CR_PER; | |
FLASH->AR = Page_Address; | |
FLASH->CR |= FLASH_CR_STRT; | |
/* Wait for last operation to be completed */ | |
status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT); | |
/* Disable the PER Bit */ | |
FLASH->CR &= ~FLASH_CR_PER; | |
} | |
/* Return the Erase Status */ | |
return status; | |
} | |
/** | |
* @brief Erases all FLASH pages. | |
* @note To correctly run this function, the FLASH_Unlock() function | |
* must be called before. | |
* Call the FLASH_Lock() to disable the flash memory access | |
* (recommended to protect the FLASH memory against possible unwanted operation) | |
* @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(FLASH_ER_PRG_TIMEOUT); | |
if(status == FLASH_COMPLETE) | |
{ | |
/* if the previous operation is completed, proceed to erase all pages */ | |
FLASH->CR |= FLASH_CR_MER; | |
FLASH->CR |= FLASH_CR_STRT; | |
/* Wait for last operation to be completed */ | |
status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT); | |
/* Disable the MER Bit */ | |
FLASH->CR &= ~FLASH_CR_MER; | |
} | |
/* Return the Erase Status */ | |
return status; | |
} | |
/** | |
* @brief Programs a word at a specified address. | |
* @note To correctly run this function, the FLASH_Unlock() function | |
* must be called before. | |
* Call the FLASH_Lock() to disable the flash memory access | |
* (recommended to protect the FLASH memory against possible unwanted operation) | |
* @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_PROGRAM_ADDRESS(Address)); | |
/* Wait for last operation to be completed */ | |
status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT); | |
if(status == FLASH_COMPLETE) | |
{ | |
/* If the previous operation is completed, proceed to program the new first | |
half word */ | |
FLASH->CR |= FLASH_CR_PG; | |
*(__IO uint16_t*)Address = (uint16_t)Data; | |
/* Wait for last operation to be completed */ | |
status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT); | |
if(status == FLASH_COMPLETE) | |
{ | |
/* If the previous operation is completed, proceed to program the new second | |
half word */ | |
tmp = Address + 2; | |
*(__IO uint16_t*) tmp = Data >> 16; | |
/* Wait for last operation to be completed */ | |
status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT); | |
/* Disable the PG Bit */ | |
FLASH->CR &= ~FLASH_CR_PG; | |
} | |
else | |
{ | |
/* Disable the PG Bit */ | |
FLASH->CR &= ~FLASH_CR_PG; | |
} | |
} | |
/* Return the Program Status */ | |
return status; | |
} | |
/** | |
* @brief Programs a half word at a specified address. | |
* @note To correctly run this function, the FLASH_Unlock() function | |
* must be called before. | |
* Call the FLASH_Lock() to disable the flash memory access | |
* (recommended to protect the FLASH memory against possible unwanted operation) | |
* @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_PROGRAM_ADDRESS(Address)); | |
/* Wait for last operation to be completed */ | |
status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT); | |
if(status == FLASH_COMPLETE) | |
{ | |
/* If the previous operation is completed, proceed to program the new data */ | |
FLASH->CR |= FLASH_CR_PG; | |
*(__IO uint16_t*)Address = Data; | |
/* Wait for last operation to be completed */ | |
status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT); | |
/* Disable the PG Bit */ | |
FLASH->CR &= ~FLASH_CR_PG; | |
} | |
/* Return the Program Status */ | |
return status; | |
} | |
/** | |
* @} | |
*/ | |
/** @defgroup FLASH_Group3 Option Bytes Programming functions | |
* @brief Option Bytes Programming functions | |
* | |
@verbatim | |
=============================================================================== | |
##### Option Bytes Programming functions ##### | |
=============================================================================== | |
[..] The FLASH_Option Bytes Programming_functions, includes the following functions: | |
(+) void FLASH_OB_Unlock(void); | |
(+) void FLASH_OB_Lock(void); | |
(+) void FLASH_OB_Launch(void); | |
(+) FLASH_Status FLASH_OB_Erase(void); | |
(+) FLASH_Status FLASH_OB_WRPConfig(uint32_t OB_WRP, FunctionalState NewState); | |
(+) FLASH_Status FLASH_OB_RDPConfig(uint8_t OB_RDP); | |
(+) FLASH_Status FLASH_OB_UserConfig(uint8_t OB_IWDG, uint8_t OB_STOP, uint8_t OB_STDBY); | |
(+) FLASH_Status FLASH_OB_BOOTConfig(uint8_t OB_BOOT1); | |
(+) FLASH_Status FLASH_OB_VDDAConfig(uint8_t OB_VDDA_ANALOG); | |
(+) FLASH_Status FLASH_OB_WriteUser(uint8_t OB_USER); | |
(+) uint8_t FLASH_OB_GetUser(void); | |
(+) uint32_t FLASH_OB_GetWRP(void); | |
(+) FlagStatus FLASH_OB_GetRDP(void); | |
[..] Any operation of erase or program should follow these steps: | |
(#) Call the FLASH_OB_Unlock() function to enable the Option Bytes registers access | |
(#) Call one or several functions to program the desired option bytes | |
(++) FLASH_Status FLASH_OB_RDPConfig(uint8_t OB_RDP) => to set the desired read Protection Level | |
(++) FLASH_Status FLASH_OB_WRPConfig(uint32_t OB_WRP, FunctionalState NewState) | |
=> to Enable/Disable the desired sector write protection | |
(++) FLASH_Status FLASH_OB_UserConfig(uint8_t OB_IWDG, uint8_t OB_STOP, uint8_t OB_STDBY) | |
=> to configure the user option Bytes: IWDG, STOP and the Standby. | |
(++) FLASH_Status FLASH_OB_BOOTConfig(uint8_t OB_BOOT1) | |
=> to set or reset BOOT1 | |
(++) FLASH_Status FLASH_OB_VDDAConfig(uint8_t OB_VDDA_ANALOG) | |
=> to enable or disable the VDDA Analog Monitoring | |
(++) You can write all User Options bytes at once using a single function | |
by calling FLASH_Status FLASH_OB_WriteUser(uint8_t OB_USER) | |
(#) Once all needed option bytes to be programmed are correctly written, call the | |
FLASH_OB_Launch(void) function to launch the Option Bytes programming process. | |
(#) Call the FLASH_OB_Lock() to disable the Option Bytes registers access (recommended | |
to protect the option Bytes against possible unwanted operations) | |
@endverbatim | |
* @{ | |
*/ | |
/** | |
* @brief Unlocks the option bytes block access. | |
* @param None | |
* @retval None | |
*/ | |
void FLASH_OB_Unlock(void) | |
{ | |
if((FLASH->CR & FLASH_CR_OPTWRE) == RESET) | |
{ | |
/* Unlocking the option bytes block access */ | |
FLASH->OPTKEYR = FLASH_OPTKEY1; | |
FLASH->OPTKEYR = FLASH_OPTKEY2; | |
} | |
} | |
/** | |
* @brief Locks the option bytes block access. | |
* @param None | |
* @retval None | |
*/ | |
void FLASH_OB_Lock(void) | |
{ | |
/* Set the OPTWREN Bit to lock the option bytes block access */ | |
FLASH->CR &= ~FLASH_CR_OPTWRE; | |
} | |
/** | |
* @brief Launch the option byte loading. | |
* @param None | |
* @retval None | |
*/ | |
void FLASH_OB_Launch(void) | |
{ | |
/* Set the OBL_Launch bit to launch the option byte loading */ | |
FLASH->CR |= FLASH_CR_OBL_LAUNCH; | |
} | |
/** | |
* @brief Erases the FLASH option bytes. | |
* @note To correctly run this function, the FLASH_OB_Unlock() function | |
* must be called before. | |
* Call the FLASH_OB_Lock() to disable the flash control register access and the option bytes | |
* (recommended to protect the FLASH memory against possible unwanted operation) | |
* @note This functions erases all option bytes except the Read protection (RDP). | |
* @param None | |
* @retval FLASH Status: The returned value can be: FLASH_ERROR_PG, | |
* FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT. | |
*/ | |
FLASH_Status FLASH_OB_Erase(void) | |
{ | |
uint16_t rdptmp = OB_RDP_Level_0; | |
FLASH_Status status = FLASH_COMPLETE; | |
/* Get the actual read protection Option Byte value */ | |
if(FLASH_OB_GetRDP() != RESET) | |
{ | |
rdptmp = 0x00; | |
} | |
/* Wait for last operation to be completed */ | |
status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT); | |
if(status == FLASH_COMPLETE) | |
{ | |
/* If the previous operation is completed, proceed to erase the option bytes */ | |
FLASH->CR |= FLASH_CR_OPTER; | |
FLASH->CR |= FLASH_CR_STRT; | |
/* Wait for last operation to be completed */ | |
status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT); | |
if(status == FLASH_COMPLETE) | |
{ | |
/* If the erase operation is completed, disable the OPTER Bit */ | |
FLASH->CR &= ~FLASH_CR_OPTER; | |
/* Enable the Option Bytes Programming operation */ | |
FLASH->CR |= FLASH_CR_OPTPG; | |
/* Restore the last read protection Option Byte value */ | |
OB->RDP = (uint16_t)rdptmp; | |
/* Wait for last operation to be completed */ | |
status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT); | |
if(status != FLASH_TIMEOUT) | |
{ | |
/* if the program operation is completed, disable the OPTPG Bit */ | |
FLASH->CR &= ~FLASH_CR_OPTPG; | |
} | |
} | |
else | |
{ | |
if (status != FLASH_TIMEOUT) | |
{ | |
/* Disable the OPTPG Bit */ | |
FLASH->CR &= ~FLASH_CR_OPTPG; | |
} | |
} | |
} | |
/* Return the erase status */ | |
return status; | |
} | |
/** | |
* @brief Write protects the desired pages | |
* @note To correctly run this function, the FLASH_OB_Unlock() function | |
* must be called before. | |
* Call the FLASH_OB_Lock() to disable the flash control register access and the option bytes | |
* (recommended to protect the FLASH memory against possible unwanted operation) | |
* @param OB_WRP: specifies the address of the pages to be write protected. | |
* This parameter can be: | |
* @arg OB_WRP_Pages0to3..OB_WRP_Pages60to63 | |
* @arg OB_WRP_AllPages | |
* @retval FLASH Status: The returned value can be: | |
* FLASH_ERROR_PROGRAM, FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT. | |
*/ | |
FLASH_Status FLASH_OB_EnableWRP(uint32_t OB_WRP) | |
{ | |
uint16_t WRP0_Data = 0xFFFF, WRP1_Data = 0xFFFF; | |
FLASH_Status status = FLASH_COMPLETE; | |
/* Check the parameters */ | |
assert_param(IS_OB_WRP(OB_WRP)); | |
OB_WRP = (uint32_t)(~OB_WRP); | |
WRP0_Data = (uint16_t)(OB_WRP & OB_WRP0_WRP0); | |
WRP1_Data = (uint16_t)((OB_WRP & OB_WRP0_nWRP0) >> 8); | |
/* Wait for last operation to be completed */ | |
status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT); | |
if(status == FLASH_COMPLETE) | |
{ | |
FLASH->CR |= FLASH_CR_OPTPG; | |
if(WRP0_Data != 0xFF) | |
{ | |
OB->WRP0 = WRP0_Data; | |
/* Wait for last operation to be completed */ | |
status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT); | |
} | |
if((status == FLASH_COMPLETE) && (WRP1_Data != 0xFF)) | |
{ | |
OB->WRP1 = WRP1_Data; | |
/* Wait for last operation to be completed */ | |
status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT); | |
} | |
if(status != FLASH_TIMEOUT) | |
{ | |
/* if the program operation is completed, disable the OPTPG Bit */ | |
FLASH->CR &= ~FLASH_CR_OPTPG; | |
} | |
} | |
/* Return the write protection operation Status */ | |
return status; | |
} | |
/** | |
* @brief Enables or disables the read out protection. | |
* @note To correctly run this function, the FLASH_OB_Unlock() function | |
* must be called before. | |
* Call the FLASH_OB_Lock() to disable the flash control register access and the option bytes | |
* (recommended to protect the FLASH memory against possible unwanted operation) | |
* @param FLASH_ReadProtection_Level: specifies the read protection level. | |
* This parameter can be: | |
* @arg OB_RDP_Level_0: No protection | |
* @arg OB_RDP_Level_1: Read protection of the memory | |
* @arg OB_RDP_Level_2: Chip protection | |
* @retval FLASH Status: The returned value can be: | |
* FLASH_ERROR_PROGRAM, FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT. | |
*/ | |
FLASH_Status FLASH_OB_RDPConfig(uint8_t OB_RDP) | |
{ | |
FLASH_Status status = FLASH_COMPLETE; | |
/* Check the parameters */ | |
assert_param(IS_OB_RDP(OB_RDP)); | |
status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT); | |
if(status == FLASH_COMPLETE) | |
{ | |
FLASH->CR |= FLASH_CR_OPTER; | |
FLASH->CR |= FLASH_CR_STRT; | |
/* Wait for last operation to be completed */ | |
status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT); | |
if(status == FLASH_COMPLETE) | |
{ | |
/* If the erase operation is completed, disable the OPTER Bit */ | |
FLASH->CR &= ~FLASH_CR_OPTER; | |
/* Enable the Option Bytes Programming operation */ | |
FLASH->CR |= FLASH_CR_OPTPG; | |
OB->RDP = OB_RDP; | |
/* Wait for last operation to be completed */ | |
status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT); | |
if(status != FLASH_TIMEOUT) | |
{ | |
/* if the program operation is completed, disable the OPTPG Bit */ | |
FLASH->CR &= ~FLASH_CR_OPTPG; | |
} | |
} | |
else | |
{ | |
if(status != FLASH_TIMEOUT) | |
{ | |
/* Disable the OPTER Bit */ | |
FLASH->CR &= ~FLASH_CR_OPTER; | |
} | |
} | |
} | |
/* Return the protection operation Status */ | |
return status; | |
} | |
/** | |
* @brief Programs the FLASH User Option Byte: IWDG_SW / RST_STOP / RST_STDBY. | |
* @note To correctly run this function, the FLASH_OB_Unlock() function | |
* must be called before. | |
* Call the FLASH_OB_Lock() to disable the flash control register access and the option bytes | |
* (recommended to protect the FLASH memory against possible unwanted operation) | |
* @param OB_IWDG: Selects the WDG mode | |
* This parameter can be one of the following values: | |
* @arg OB_IWDG_SW: Software WDG selected | |
* @arg OB_IWDG_HW: Hardware WDG 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_PROGRAM, FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT. | |
*/ | |
FLASH_Status FLASH_OB_UserConfig(uint8_t OB_IWDG, uint8_t OB_STOP, uint8_t OB_STDBY) | |
{ | |
FLASH_Status status = FLASH_COMPLETE; | |
/* Check the parameters */ | |
assert_param(IS_OB_IWDG_SOURCE(OB_IWDG)); | |
assert_param(IS_OB_STOP_SOURCE(OB_STOP)); | |
assert_param(IS_OB_STDBY_SOURCE(OB_STDBY)); | |
/* Wait for last operation to be completed */ | |
status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT); | |
if(status == FLASH_COMPLETE) | |
{ | |
/* Enable the Option Bytes Programming operation */ | |
FLASH->CR |= FLASH_CR_OPTPG; | |
OB->USER = (uint16_t)((uint16_t)(OB_IWDG | OB_STOP) | (uint16_t)(OB_STDBY | 0xF8)); | |
/* Wait for last operation to be completed */ | |
status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT); | |
if(status != FLASH_TIMEOUT) | |
{ | |
/* If the program operation is completed, disable the OPTPG Bit */ | |
FLASH->CR &= ~FLASH_CR_OPTPG; | |
} | |
} | |
/* Return the Option Byte program Status */ | |
return status; | |
} | |
/** | |
* @brief Sets or resets the BOOT1. | |
* @param OB_BOOT1: Set or Reset the BOOT1. | |
* This parameter can be one of the following values: | |
* @arg OB_BOOT1_RESET: BOOT1 Reset | |
* @arg OB_BOOT1_SET: BOOT1 Set | |
* @retval None | |
*/ | |
FLASH_Status FLASH_OB_BOOTConfig(uint8_t OB_BOOT1) | |
{ | |
FLASH_Status status = FLASH_COMPLETE; | |
/* Check the parameters */ | |
assert_param(IS_OB_BOOT1(OB_BOOT1)); | |
/* Wait for last operation to be completed */ | |
status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT); | |
if(status == FLASH_COMPLETE) | |
{ | |
/* Enable the Option Bytes Programming operation */ | |
FLASH->CR |= FLASH_CR_OPTPG; | |
OB->USER = OB_BOOT1 | 0xEF; | |
/* Wait for last operation to be completed */ | |
status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT); | |
if(status != FLASH_TIMEOUT) | |
{ | |
/* If the program operation is completed, disable the OPTPG Bit */ | |
FLASH->CR &= ~FLASH_CR_OPTPG; | |
} | |
} | |
/* Return the Option Byte program Status */ | |
return status; | |
} | |
/** | |
* @brief Sets or resets the analogue monitoring on VDDA Power source. | |
* @param OB_VDDA_ANALOG: Selects the analog monitoring on VDDA Power source. | |
* This parameter can be one of the following values: | |
* @arg OB_VDDA_ANALOG_ON: Analog monitoring on VDDA Power source ON | |
* @arg OB_VDDA_ANALOG_OFF: Analog monitoring on VDDA Power source OFF | |
* @retval None | |
*/ | |
FLASH_Status FLASH_OB_VDDAConfig(uint8_t OB_VDDA_ANALOG) | |
{ | |
FLASH_Status status = FLASH_COMPLETE; | |
/* Check the parameters */ | |
assert_param(IS_OB_VDDA_ANALOG(OB_VDDA_ANALOG)); | |
/* Wait for last operation to be completed */ | |
status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT); | |
if(status == FLASH_COMPLETE) | |
{ | |
/* Enable the Option Bytes Programming operation */ | |
FLASH->CR |= FLASH_CR_OPTPG; | |
OB->USER = OB_VDDA_ANALOG | 0xDF; | |
/* Wait for last operation to be completed */ | |
status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT); | |
if(status != FLASH_TIMEOUT) | |
{ | |
/* if the program operation is completed, disable the OPTPG Bit */ | |
FLASH->CR &= ~FLASH_CR_OPTPG; | |
} | |
} | |
/* Return the Option Byte program Status */ | |
return status; | |
} | |
/** | |
* @brief Programs the FLASH User Option Byte: IWDG_SW, RST_STOP, RST_STDBY, | |
* BOOT1 and VDDA ANALOG monitoring. | |
* @note To correctly run this function, the FLASH_OB_Unlock() function | |
* must be called before. | |
* Call the FLASH_OB_Lock() to disable the flash control register access and the option bytes | |
* (recommended to protect the FLASH memory against possible unwanted operation) | |
* @param OB_USER: Selects all user option bytes | |
* This parameter is a combination of the following values: | |
* @arg OB_IWDG_SW / OB_IWDG_HW: Software / Hardware WDG selected | |
* @arg OB_STOP_NoRST / OB_STOP_RST: No reset / Reset generated when entering in STOP | |
* @arg OB_STDBY_NoRST / OB_STDBY_RST: No reset / Reset generated when entering in STANDBY | |
* @arg OB_BOOT1_RESET / OB_BOOT1_SET: BOOT1 Reset / Set | |
* @arg OB_VDDA_ANALOG_ON / OB_VDDA_ANALOG_OFF: Analog monitoring on VDDA Power source ON / OFF | |
* @retval FLASH Status: The returned value can be: | |
* FLASH_ERROR_PROGRAM, FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT. | |
*/ | |
FLASH_Status FLASH_OB_WriteUser(uint8_t OB_USER) | |
{ | |
FLASH_Status status = FLASH_COMPLETE; | |
/* Wait for last operation to be completed */ | |
status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT); | |
if(status == FLASH_COMPLETE) | |
{ | |
/* Enable the Option Bytes Programming operation */ | |
FLASH->CR |= FLASH_CR_OPTPG; | |
OB->USER = OB_USER | 0xC8; | |
/* Wait for last operation to be completed */ | |
status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT); | |
if(status != FLASH_TIMEOUT) | |
{ | |
/* If the program operation is completed, disable the OPTPG Bit */ | |
FLASH->CR &= ~FLASH_CR_OPTPG; | |
} | |
} | |
/* Return the Option Byte program Status */ | |
return status; | |
} | |
/** | |
* @brief Returns the FLASH User Option Bytes values. | |
* @param None | |
* @retval The FLASH User Option Bytes . | |
*/ | |
uint8_t FLASH_OB_GetUser(void) | |
{ | |
/* Return the User Option Byte */ | |
return (uint8_t)(FLASH->OBR >> 8); | |
} | |
/** | |
* @brief Returns the FLASH Write Protection Option Bytes value. | |
* @param None | |
* @retval The FLASH Write Protection Option Bytes value | |
*/ | |
uint32_t FLASH_OB_GetWRP(void) | |
{ | |
/* Return the FLASH 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_OB_GetRDP(void) | |
{ | |
FlagStatus readstatus = RESET; | |
if ((uint8_t)(FLASH->OBR & (FLASH_OBR_RDPRT1 | FLASH_OBR_RDPRT2)) != RESET) | |
{ | |
readstatus = SET; | |
} | |
else | |
{ | |
readstatus = RESET; | |
} | |
return readstatus; | |
} | |
/** | |
* @} | |
*/ | |
/** @defgroup FLASH_Group4 Interrupts and flags management functions | |
* @brief Interrupts and flags management functions | |
* | |
@verbatim | |
=============================================================================== | |
##### Interrupts and flags management functions ##### | |
=============================================================================== | |
@endverbatim | |
* @{ | |
*/ | |
/** | |
* @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_EOP: FLASH end of programming Interrupt | |
* @arg FLASH_IT_ERR: FLASH Error Interrupt | |
* @retval None | |
*/ | |
void FLASH_ITConfig(uint32_t FLASH_IT, FunctionalState NewState) | |
{ | |
/* Check the parameters */ | |
assert_param(IS_FLASH_IT(FLASH_IT)); | |
assert_param(IS_FUNCTIONAL_STATE(NewState)); | |
if(NewState != DISABLE) | |
{ | |
/* Enable the interrupt sources */ | |
FLASH->CR |= FLASH_IT; | |
} | |
else | |
{ | |
/* Disable the interrupt sources */ | |
FLASH->CR &= ~(uint32_t)FLASH_IT; | |
} | |
} | |
/** | |
* @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 write/erase operations in progress flag | |
* @arg FLASH_FLAG_PGERR: FLASH Programming error flag flag | |
* @arg FLASH_FLAG_WRPERR: FLASH Write protected error flag | |
* @arg FLASH_FLAG_EOP: FLASH End of Programming flag | |
* @retval The new state of FLASH_FLAG (SET or RESET). | |
*/ | |
FlagStatus FLASH_GetFlagStatus(uint32_t FLASH_FLAG) | |
{ | |
FlagStatus bitstatus = RESET; | |
/* Check the parameters */ | |
assert_param(IS_FLASH_GET_FLAG(FLASH_FLAG)); | |
if((FLASH->SR & FLASH_FLAG) != (uint32_t)RESET) | |
{ | |
bitstatus = SET; | |
} | |
else | |
{ | |
bitstatus = RESET; | |
} | |
/* Return the new state of FLASH_FLAG (SET or RESET) */ | |
return bitstatus; | |
} | |
/** | |
* @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 Programming error flag flag | |
* @arg FLASH_FLAG_WRPERR: FLASH Write protected error flag | |
* @arg FLASH_FLAG_EOP: FLASH End of Programming flag | |
* @retval None | |
*/ | |
void FLASH_ClearFlag(uint32_t FLASH_FLAG) | |
{ | |
/* Check the parameters */ | |
assert_param(IS_FLASH_CLEAR_FLAG(FLASH_FLAG)); | |
/* Clear the flags */ | |
FLASH->SR = FLASH_FLAG; | |
} | |
/** | |
* @brief Returns the FLASH Status. | |
* @param None | |
* @retval FLASH Status: The returned value can be: | |
* FLASH_BUSY, FLASH_ERROR_PROGRAM, 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 & (uint32_t)FLASH_FLAG_WRPERR)!= (uint32_t)0x00) | |
{ | |
FLASHstatus = FLASH_ERROR_WRP; | |
} | |
else | |
{ | |
if((FLASH->SR & (uint32_t)(FLASH_SR_PGERR)) != (uint32_t)0x00) | |
{ | |
FLASHstatus = FLASH_ERROR_PROGRAM; | |
} | |
else | |
{ | |
FLASHstatus = FLASH_COMPLETE; | |
} | |
} | |
} | |
/* Return the FLASH Status */ | |
return FLASHstatus; | |
} | |
/** | |
* @brief Waits for a FLASH operation to complete or a TIMEOUT to occur. | |
* @param Timeout: FLASH programming Timeout | |
* @retval FLASH Status: The returned value can be: FLASH_BUSY, | |
* FLASH_ERROR_PROGRAM, 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)) | |
{ | |
status = FLASH_GetStatus(); | |
Timeout--; | |
} | |
if(Timeout == 0x00 ) | |
{ | |
status = FLASH_TIMEOUT; | |
} | |
/* Return the operation status */ | |
return status; | |
} | |
/** | |
* @} | |
*/ | |
/** | |
* @} | |
*/ | |
/** | |
* @} | |
*/ | |
/** | |
* @} | |
*/ | |
/******************* (C) COPYRIGHT 2012 STMicroelectronics *****END OF FILE****/ |