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stm32f0-discovery/lib/src/peripherals/stm32f0xx_flash.c

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/**
******************************************************************************
* @file stm32f0xx_flash.c
* @author MCD Application Team
* @version V1.0.0
* @date 23-March-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
*
* <h2><center>&copy; COPYRIGHT 2012 STMicroelectronics</center></h2>
*
* Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
* You may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.st.com/software_license_agreement_liberty_v2
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************
*/
/* 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);
(+) FLASH_ProgramOptionByteData(uint32_t Address, uint8_t Data);
(+) 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)
(++) FLASH_ProgramOptionByteData(uint32_t Address, uint8_t Data) to program the
two half word in the option bytes
(#) 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 Sets or resets the SRAM parity.
* @param OB_SRAM_Parity: Set or Reset the SRAM parity enable bit.
* This parameter can be one of the following values:
* @arg OB_SRAM_PARITY_SET: Set SRAM parity.
* @arg OB_SRAM_PARITY_RESET: Reset SRAM parity.
* @retval None
*/
FLASH_Status FLASH_OB_SRAMParityConfig(uint8_t OB_SRAM_Parity)
{
FLASH_Status status = FLASH_COMPLETE;
/* Check the parameters */
assert_param(IS_OB_SRAM_PARITY(OB_SRAM_Parity));
/* 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_SRAM_Parity | 0xBF;
/* 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
* @arg OB_SRAM_PARITY_SET / OB_SRAM_PARITY_RESET: SRAM Parity SET / RESET
* @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 | 0x88;
/* 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 a half word at a specified Option Byte Data address.
* @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 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(FLASH_ER_PRG_TIMEOUT);
if(status == FLASH_COMPLETE)
{
/* Enables the Option Bytes Programming operation */
FLASH->CR |= FLASH_CR_OPTPG;
*(__IO uint16_t*)Address = 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 Option Byte Data 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 STMicroelectronics *****END OF FILE****/
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