www.pudn.com > Micrium-ST-uCOS-II-LCD-STM32-SK.rar > stm32f10x_flash.c
/******************** (C) COPYRIGHT 2007 STMicroelectronics ********************
* File Name : stm32f10x_flash.c
* Author : MCD Application Team
* Date First Issued : 05/21/2007
* Description : This file provides all the FLASH firmware functions.
********************************************************************************
* History:
* 05/21/2007: V0.3
********************************************************************************
* THE PRESENT SOFTWARE 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 SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*******************************************************************************/
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_flash.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Flash Access Control Register bits */
#define ACR_LATENCY_Mask ((u32)0x00000038)
#define ACR_HLFCYA_Mask ((u32)0xFFFFFFF7)
#define ACR_PRFTBE_Mask ((u32)0xFFFFFFEF)
#ifdef _FLASH_PROG
/* Flash Access Control Register bits */
#define ACR_PRFTBS_Mask ((u32)0x00000020)
/* Flash Control Register bits */
#define CR_PG_Set ((u32)0x00000001)
#define CR_PG_Reset ((u32)0x00001FFE)
#define CR_PER_Set ((u32)0x00000002)
#define CR_PER_Reset ((u32)0x00001FFD)
#define CR_MER_Set ((u32)0x00000004)
#define CR_MER_Reset ((u32)0x00001FFB)
#define CR_OPTPG_Set ((u32)0x00000010)
#define CR_OPTPG_Reset ((u32)0x00001FEF)
#define CR_OPTER_Set ((u32)0x00000020)
#define CR_OPTER_Reset ((u32)0x00001FDF)
#define CR_STRT_Set ((u32)0x00000040)
#define CR_LOCK_Set ((u32)0x00000080)
/* FLASH Mask */
#define RDPRT_Mask ((u32)0x00000002)
#define WRP0_Mask ((u32)0x000000FF)
#define WRP1_Mask ((u32)0x0000FF00)
#define WRP2_Mask ((u32)0x00FF0000)
#define WRP3_Mask ((u32)0xFF000000)
/* FLASH Keys */
#define RDP_Key ((u16)0x00A5)
#define FLASH_KEY1 ((u32)0x45670123)
#define FLASH_KEY2 ((u32)0xCDEF89AB)
/* Delay definition */
#define EraseTimeout ((u32)0x00000FFF)
#define ProgramTimeout ((u32)0x0000000F)
#endif
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
#ifdef _FLASH_PROG
static void delay(void);
#endif
/* Private functions ---------------------------------------------------------*/
/*******************************************************************************
* Function Name : FLASH_SetLatency
* Description : Sets the code latency value.
* Input : - FLASH_Latency: specifies the FLASH Latency value.
* This parameter can be one of the following values:
* - FLASH_Latency_0: FLASH Zero Latency cycle
* - FLASH_Latency_1: FLASH One Latency cycle
* - FLASH_Latency_2: FLASH Two Latency cycles
* Output : None
* Return : None
*******************************************************************************/
void FLASH_SetLatency(u32 FLASH_Latency)
{
/* Check the parameters */
assert(IS_FLASH_LATENCY(FLASH_Latency));
/* Sets the Latency value */
FLASH->ACR &= ACR_LATENCY_Mask;
FLASH->ACR |= FLASH_Latency;
}
/*******************************************************************************
* Function Name : FLASH_HalfCycleAccessCmd
* Description : Enables or disables the Half cycle flash access.
* Input : - FLASH_HalfCycle: specifies the FLASH Half cycle Access mode.
* This parameter can be one of the following values:
* - FLASH_HalfCycleAccess_Enable: FLASH Half Cycle Enable
* - FLASH_HalfCycleAccess_Disable: FLASH Half Cycle Disable
* Output : None
* Return : None
*******************************************************************************/
void FLASH_HalfCycleAccessCmd(u32 FLASH_HalfCycleAccess)
{
/* Check the parameters */
assert(IS_FLASH_HALFCYCLEACCESS_STATE(FLASH_HalfCycleAccess));
/* Enable or disable the Half cycle access */
FLASH->ACR &= ACR_HLFCYA_Mask;
FLASH->ACR |= FLASH_HalfCycleAccess;
}
/*******************************************************************************
* Function Name : FLASH_PrefetchBufferCmd
* Description : Enables or disables the Prefetch Buffer.
* Input : - FLASH_PrefetchBuffer: specifies the Prefetch buffer status.
* This parameter can be one of the following values:
* - FLASH_PrefetchBuffer_Enable: FLASH Prefetch Buffer Enable
* - FLASH_PrefetchBuffer_Disable: FLASH Prefetch Buffer Disable
* Output : None
* Return : None
*******************************************************************************/
void FLASH_PrefetchBufferCmd(u32 FLASH_PrefetchBuffer)
{
/* Check the parameters */
assert(IS_FLASH_PREFETCHBUFFER_STATE(FLASH_PrefetchBuffer));
/* Enable or disable the Prefetch Buffer */
FLASH->ACR &= ACR_PRFTBE_Mask;
FLASH->ACR |= FLASH_PrefetchBuffer;
}
#ifdef _FLASH_PROG
/*******************************************************************************
* Function Name : FLASH_Unlock
* Description : Unlocks the FLASH Program Erase Controller.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void FLASH_Unlock(void)
{
/* Authorize the FPEC Access */
FLASH->KEYR = FLASH_KEY1;
FLASH->KEYR = FLASH_KEY2;
}
/*******************************************************************************
* Function Name : FLASH_Lock
* Description : Locks the FLASH Program Erase Controller.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void FLASH_Lock(void)
{
/* Set the Lock Bit to lock the FPEC and the FCR */
FLASH->CR |= CR_LOCK_Set;
}
/*******************************************************************************
* Function Name : FLASH_ErasePage
* Description : Erases a specified FLASH page.
* Input : - Page_Address: The page address to be erased.
* Output : None
* Return : FLASH Status: The returned value can be: FLASH_BUSY,
* FLASH_ERROR_PG or FLASH_ERROR_WRP or FLASH_COMPLETE or
* FLASH_TIMEOUT.
*******************************************************************************/
FLASH_Status FLASH_ErasePage(u32 Page_Address)
{
FLASH_Status status = FLASH_COMPLETE;
/* Check the parameters */
assert(IS_FLASH_ADDRESS(Page_Address));
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation(EraseTimeout);
if(status == FLASH_COMPLETE)
{
/* if the previous operation is completed, proceed to erase the page */
FLASH->CR|= CR_PER_Set;
FLASH->AR = Page_Address;
FLASH->CR|= CR_STRT_Set;
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation(EraseTimeout);
if(status != FLASH_BUSY)
{
/* if the erase operation is completed, disable the PER Bit */
FLASH->CR &= CR_PER_Reset;
}
}
/* Return the Erase Status */
return status;
}
/*******************************************************************************
* Function Name : FLASH_EraseAllPages
* Description : Erases all FLASH pages.
* Input : None
* Output : None
* Return : FLASH Status: The returned value can be: FLASH_BUSY,
* FLASH_ERROR_PG or FLASH_ERROR_WRP or FLASH_COMPLETE or
* FLASH_TIMEOUT.
*******************************************************************************/
FLASH_Status FLASH_EraseAllPages(void)
{
FLASH_Status status = FLASH_COMPLETE;
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation(EraseTimeout);
if(status == FLASH_COMPLETE)
{
/* if the previous operation is completed, proceed to erase all pages */
FLASH->CR |= CR_MER_Set;
FLASH->CR |= CR_STRT_Set;
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation(EraseTimeout);
if(status != FLASH_BUSY)
{
/* if the erase operation is completed, disable the MER Bit */
FLASH->CR &= CR_MER_Reset;
}
}
/* Return the Erase Status */
return status;
}
/*******************************************************************************
* Function Name : FLASH_EraseOptionBytes
* Description : Erases the FLASH option bytes.
* Input : None
* Output : None
* Return : FLASH Status: The returned value can be: FLASH_BUSY,
* FLASH_ERROR_PG or FLASH_ERROR_WRP or FLASH_COMPLETE or
* FLASH_TIMEOUT.
*******************************************************************************/
FLASH_Status FLASH_EraseOptionBytes(void)
{
FLASH_Status status = FLASH_COMPLETE;
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation(EraseTimeout);
if(status == FLASH_COMPLETE)
{
/* Authorize the small information block programming */
FLASH->OPTKEYR = FLASH_KEY1;
FLASH->OPTKEYR = FLASH_KEY2;
/* if the previous operation is completed, proceed to erase the option bytes */
FLASH->CR |= CR_OPTER_Set;
FLASH->CR |= CR_STRT_Set;
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation(EraseTimeout);
if(status == FLASH_COMPLETE)
{
/* if the erase operation is completed, disable the OPTER Bit */
FLASH->CR &= CR_OPTER_Reset;
/* Enable the Option Bytes Programming operation */
FLASH->CR |= CR_OPTPG_Set;
/* Enable the readout access */
OB->RDP= RDP_Key;
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation(ProgramTimeout);
if(status != FLASH_BUSY)
{
/* if the program operation is completed, disable the OPTPG Bit */
FLASH->CR &= CR_OPTPG_Reset;
}
}
else
{
if (status != FLASH_BUSY)
{
/* Disable the OPTPG Bit */
FLASH->CR &= CR_OPTPG_Reset;
}
}
}
/* Return the erase status */
return status;
}
/*******************************************************************************
* Function Name : FLASH_ProgramWord
* Description : Programs a word at a specified address.
* Input : - Address: specifies the address to be programmed.
* - Data: specifies the data to be programmed.
* Output : None
* Return : FLASH Status: The returned value can be: FLASH_BUSY,
* FLASH_ERROR_PG or FLASH_ERROR_WRP or FLASH_COMPLETE or
* FLASH_TIMEOUT.
*******************************************************************************/
FLASH_Status FLASH_ProgramWord(u32 Address, u32 Data)
{
FLASH_Status status = FLASH_COMPLETE;
/* Check the parameters */
assert(IS_FLASH_ADDRESS(Address));
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation(ProgramTimeout);
if(status == FLASH_COMPLETE)
{
/* if the previous operation is completed, proceed to program the new first
half word */
FLASH->CR |= CR_PG_Set;
*(vu16*)Address = (u16)Data;
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation(ProgramTimeout);
if(status == FLASH_COMPLETE)
{
/* if the previous operation is completed, proceed to program the new second
half word */
*(vu16*)(Address + 2) = Data >> 16;
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation(ProgramTimeout);
if(status != FLASH_BUSY)
{
/* Disable the PG Bit */
FLASH->CR &= CR_PG_Reset;
}
}
else
{
if (status != FLASH_BUSY)
{
/* Disable the PG Bit */
FLASH->CR &= CR_PG_Reset;
}
}
}
/* Return the Program Status */
return status;
}
/*******************************************************************************
* Function Name : FLASH_ProgramHalfWord
* Description : Programs a half word at a specified address.
* Input : - Address: specifies the address to be programmed.
* - Data: specifies the data to be programmed.
* Output : None
* Return : FLASH Status: The returned value can be: FLASH_BUSY,
* FLASH_ERROR_PG or FLASH_ERROR_WRP or FLASH_COMPLETE or
* FLASH_TIMEOUT.
*******************************************************************************/
FLASH_Status FLASH_ProgramHalfWord(u32 Address, u16 Data)
{
FLASH_Status status = FLASH_COMPLETE;
/* Check the parameters */
assert(IS_FLASH_ADDRESS(Address));
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation(ProgramTimeout);
if(status == FLASH_COMPLETE)
{
/* if the previous operation is completed, proceed to program the new data */
FLASH->CR |= CR_PG_Set;
*(vu16*)Address = Data;
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation(ProgramTimeout);
if(status != FLASH_BUSY)
{
/* if the program operation is completed, disable the PG Bit */
FLASH->CR &= CR_PG_Reset;
}
}
/* Return the Program Status */
return status;
}
/*******************************************************************************
* Function Name : FLASH_ProgramOptionByteData
* Description : Programs a half word at a specified Option Byte Data address.
* Input : - Address: specifies the address to be programmed.
* This parameter can be 0x1FFFF804 or 0x1FFFF806.
* - Data: specifies the data to be programmed.
* Output : None
* Return : FLASH Status: The returned value can be: FLASH_BUSY,
* FLASH_ERROR_PG or FLASH_ERROR_WRP or FLASH_COMPLETE or
* FLASH_TIMEOUT.
*******************************************************************************/
FLASH_Status FLASH_ProgramOptionByteData(u32 Address, u8 Data)
{
FLASH_Status status = FLASH_COMPLETE;
/* Check the parameters */
assert(IS_OB_DATA_ADDRESS(Address));
status = FLASH_WaitForLastOperation(ProgramTimeout);
if(status == FLASH_COMPLETE)
{
/* Authorize the small information block programming */
FLASH->OPTKEYR = FLASH_KEY1;
FLASH->OPTKEYR = FLASH_KEY2;
/* Enables the Option Bytes Programming operation */
FLASH->CR |= CR_OPTPG_Set;
*(vu16*)Address = Data;
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation(ProgramTimeout);
if(status != FLASH_BUSY)
{
/* if the program operation is completed, disable the OPTPG Bit */
FLASH->CR &= CR_OPTPG_Reset;
}
}
/* Return the Option Byte Data Program Status */
return status;
}
/*******************************************************************************
* Function Name : FLASH_EnableWriteProtection
* Description : Write protects the desired pages
* Input : - FLASH_Pages: specifies the address of the pages to be
* write protected. This parameter can be:
* - A value between FLASH_WRProt_Pages0to3 and
* FLASH_WRProt_Pages124to127
* - FLASH_WRProt_AllPages
* Output : None
* Return : FLASH Status: The returned value can be: FLASH_BUSY,
* FLASH_ERROR_PG or FLASH_ERROR_WRP or FLASH_COMPLETE or
* FLASH_TIMEOUT.
*******************************************************************************/
FLASH_Status FLASH_EnableWriteProtection(u32 FLASH_Pages)
{
u16 WRP0_Data = 0xFFFF, WRP1_Data = 0xFFFF, WRP2_Data = 0xFFFF, WRP3_Data = 0xFFFF;
FLASH_Status status = FLASH_COMPLETE;
/* Check the parameters */
assert(IS_FLASH_WRPROT_PAGE(FLASH_Pages));
FLASH_Pages = (u32)(~FLASH_Pages);
WRP0_Data = (vu16)(FLASH_Pages & WRP0_Mask);
WRP1_Data = (vu16)((FLASH_Pages & WRP1_Mask) >> 8);
WRP2_Data = (vu16)((FLASH_Pages & WRP2_Mask) >> 16);
WRP3_Data = (vu16)((FLASH_Pages & WRP3_Mask) >> 24);
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation(ProgramTimeout);
if(status == FLASH_COMPLETE)
{
/* Authorizes the small information block programming */
FLASH->OPTKEYR = FLASH_KEY1;
FLASH->OPTKEYR = FLASH_KEY2;
FLASH->CR |= CR_OPTPG_Set;
if(WRP0_Data != 0xFF)
{
OB->WRP0 = WRP0_Data;
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation(ProgramTimeout);
}
if((status == FLASH_COMPLETE) && (WRP1_Data != 0xFF))
{
OB->WRP1 = WRP1_Data;
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation(ProgramTimeout);
}
if((status == FLASH_COMPLETE) && (WRP2_Data != 0xFF))
{
OB->WRP2 = WRP2_Data;
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation(ProgramTimeout);
}
if((status == FLASH_COMPLETE)&& (WRP3_Data != 0xFF))
{
OB->WRP3 = WRP3_Data;
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation(ProgramTimeout);
}
if(status != FLASH_BUSY)
{
/* if the program operation is completed, disable the OPTPG Bit */
FLASH->CR &= CR_OPTPG_Reset;
}
}
/* Return the write protection operation Status */
return status;
}
/*******************************************************************************
* Function Name : FLASH_ReadOutProtection
* Description : Enables or disables the read out protection
* Input : - Newstate: new state of the ReadOut Protection.
* This parameter can be: ENABLE or DISABLE.
* Output : None
* Return : FLASH Status: The returned value can be: FLASH_BUSY,
* FLASH_ERROR_PG or FLASH_ERROR_WRP or FLASH_COMPLETE or
* FLASH_TIMEOUT.
*******************************************************************************/
FLASH_Status FLASH_ReadOutProtection(FunctionalState NewState)
{
FLASH_Status status = FLASH_COMPLETE;
/* Check the parameters */
assert(IS_FUNCTIONAL_STATE(NewState));
status = FLASH_WaitForLastOperation(EraseTimeout);
if(status == FLASH_COMPLETE)
{
/* Authorizes the small information block programming */
FLASH->OPTKEYR = FLASH_KEY1;
FLASH->OPTKEYR = FLASH_KEY2;
FLASH->CR |= CR_OPTER_Set;
FLASH->CR |= CR_STRT_Set;
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation(EraseTimeout);
if(status == FLASH_COMPLETE)
{
/* if the erase operation is completed, disable the OPTER Bit */
FLASH->CR &= CR_OPTER_Reset;
/* Enable the Option Bytes Programming operation */
FLASH->CR |= CR_OPTPG_Set;
if(NewState != DISABLE)
{
OB->RDP = 0x00;
}
else
{
OB->RDP = RDP_Key;
}
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation(EraseTimeout);
if(status != FLASH_BUSY)
{
/* if the program operation is completed, disable the OPTPG Bit */
FLASH->CR &= CR_OPTPG_Reset;
}
}
else
{
if(status != FLASH_BUSY)
{
/* Disable the OPTER Bit */
FLASH->CR &= CR_OPTER_Reset;
}
}
}
/* Return the protection operation Status */
return status;
}
/*******************************************************************************
* Function Name : FLASH_UserOptionByteConfig
* Description : Programs the FLASH User Option Byte: IWDG_SW / RST_STOP /
* RST_STDBY.
* Input : - OB_IWDG: Selects the IWDG mode
* This parameter can be one of the following values:
* - OB_IWDG_SW: Software IWDG selected
* - OB_IWDG_HW: Hardware IWDG selected
* - OB_STOP: Reset event when entering STOP mode.
* This parameter can be one of the following values:
* - OB_STOP_NoRST: No reset generated when entering in STOP
* - OB_STOP_RST: Reset generated when entering in STOP
* - OB_STDBY: Reset event when entering Standby mode.
* This parameter can be one of the following values:
* - OB_STDBY_NoRST: No reset generated when entering in STANDBY
* - OB_STDBY_RST: Reset generated when entering in STANDBY
* Output : None
* Return : FLASH Status: The returned value can be: FLASH_BUSY,
* FLASH_ERROR_PG or FLASH_ERROR_WRP or FLASH_COMPLETE or
* FLASH_TIMEOUT.
*******************************************************************************/
FLASH_Status FLASH_UserOptionByteConfig(u16 OB_IWDG, u16 OB_STOP, u16 OB_STDBY)
{
FLASH_Status status = FLASH_COMPLETE;
/* Check the parameters */
assert(IS_OB_IWDG_SOURCE(OB_IWDG));
assert(IS_OB_STOP_SOURCE(OB_STOP));
assert(IS_OB_STDBY_SOURCE(OB_STDBY));
/* Authorize the small information block programming */
FLASH->OPTKEYR = FLASH_KEY1;
FLASH->OPTKEYR = FLASH_KEY2;
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation(ProgramTimeout);
if(status == FLASH_COMPLETE)
{
/* Enable the Option Bytes Programming operation */
FLASH->CR |= CR_OPTPG_Set;
OB->USER = ( OB_IWDG | OB_STOP |OB_STDBY) | (u16)0xF8;
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation(ProgramTimeout);
if(status != FLASH_BUSY)
{
/* if the program operation is completed, disable the OPTPG Bit */
FLASH->CR &= CR_OPTPG_Reset;
}
}
/* Return the Option Byte program Status */
return status;
}
/*******************************************************************************
* Function Name : FLASH_GetUserOptionByte
* Description : Returns the FLASH User Option Bytes values.
* Input : None
* Output : None
* Return : The FLASH User Option Bytes values:IWDG_SW(Bit0), RST_STOP(Bit1)
* and RST_STDBY(Bit2).
*******************************************************************************/
u32 FLASH_GetUserOptionByte(void)
{
/* Return the User Option Byte */
return (u32)(FLASH->OBR >> 2);
}
/*******************************************************************************
* Function Name : FLASH_GetWriteProtectionOptionByte
* Description : Returns the FLASH Write Protection Option Bytes Register value.
* Input : None
* Output : None
* Return : The FLASH Write Protection Option Bytes Register value
*******************************************************************************/
u32 FLASH_GetWriteProtectionOptionByte(void)
{
/* Return the Falsh write protection Register value */
return (u32)(FLASH->WRPR);
}
/*******************************************************************************
* Function Name : FLASH_GetReadOutProtectionStatus
* Description : Checks whether the FLASH Read Out Protection Status is set
* or not.
* Input : None
* Output : None
* Return : FLASH ReadOut Protection Status(SET or RESET)
*******************************************************************************/
FlagStatus FLASH_GetReadOutProtectionStatus(void)
{
FlagStatus readoutstatus = RESET;
if ((FLASH->OBR & RDPRT_Mask) != (u32)RESET)
{
readoutstatus = SET;
}
else
{
readoutstatus = RESET;
}
return readoutstatus;
}
/*******************************************************************************
* Function Name : FLASH_GetPrefetchBufferStatus
* Description : Checks whether the FLASH Prefetch Buffer status is set or not.
* Input : None
* Output : None
* Return : FLASH Prefetch Buffer Status (SET or RESET).
*******************************************************************************/
FlagStatus FLASH_GetPrefetchBufferStatus(void)
{
FlagStatus bitstatus = RESET;
if ((FLASH->ACR & ACR_PRFTBS_Mask) != (u32)RESET)
{
bitstatus = SET;
}
else
{
bitstatus = RESET;
}
/* Return the new state of FLASH Prefetch Buffer Status (SET or RESET) */
return bitstatus;
}
/*******************************************************************************
* Function Name : FLASH_ITConfig
* Description : Enables or disables the specified FLASH interrupts.
* Input : - FLASH_IT: specifies the FLASH interrupt sources to be
* enabled or disabled.
* This parameter can be any combination of the following values:
* - FLASH_IT_ERROR: FLASH Error Interrupt
* - FLASH_IT_EOP: FLASH end of operation Interrupt
* Output : None
* Return : None
*******************************************************************************/
void FLASH_ITConfig(u16 FLASH_IT, FunctionalState NewState)
{
/* Check the parameters */
assert(IS_FLASH_IT(FLASH_IT));
assert(IS_FUNCTIONAL_STATE(NewState));
if(NewState != DISABLE)
{
/* Enable the interrupt sources */
FLASH->CR |= FLASH_IT;
}
else
{
/* Disable the interrupt sources */
FLASH->CR &= ~(u32)FLASH_IT;
}
}
/*******************************************************************************
* Function Name : FLASH_GetFlagStatus
* Description : Checks whether the specified FLASH flag is set or not.
* Input : - FLASH_FLAG: specifies the FLASH flag to check.
* This parameter can be one of the following values:
* - FLASH_FLAG_BSY: FLASH Busy flag
* - FLASH_FLAG_PGERR: FLASH Program error flag
* - FLASH_FLAG_WRPRTERR: FLASH Write protected error flag
* - FLASH_FLAG_EOP: FLASH End of Operation flag
* - FLASH_FLAG_OPTERR: FLASH Option Byte error flag
* Output : None
* Return : The new state of FLASH_FLAG (SET or RESET).
*******************************************************************************/
FlagStatus FLASH_GetFlagStatus(u16 FLASH_FLAG)
{
FlagStatus bitstatus = RESET;
/* Check the parameters */
assert(IS_FLASH_GET_FLAG(FLASH_FLAG)) ;
if(FLASH_FLAG == FLASH_FLAG_OPTERR)
{
if((FLASH->OBR & FLASH_FLAG_OPTERR) != (u32)RESET)
{
bitstatus = SET;
}
else
{
bitstatus = RESET;
}
}
else
{
if((FLASH->SR & FLASH_FLAG) != (u32)RESET)
{
bitstatus = SET;
}
else
{
bitstatus = RESET;
}
}
/* Return the new state of FLASH_FLAG (SET or RESET) */
return bitstatus;
}
/*******************************************************************************
* Function Name : FLASH_ClearFlag
* Description : Clears the FLASH’s pending flags.
* Input : - FLASH_FLAG: specifies the FLASH flags to clear.
* This parameter can be any combination of the following values:
* - FLASH_FLAG_BSY: FLASH Busy flag
* - FLASH_FLAG_PGERR: FLASH Program error flag
* - FLASH_FLAG_WRPRTERR: FLASH Write protected error flag
* - FLASH_FLAG_EOP: FLASH End of Operation flag
* Output : None
* Return : None
*******************************************************************************/
void FLASH_ClearFlag(u16 FLASH_FLAG)
{
/* Check the parameters */
assert(IS_FLASH_CLEAR_FLAG(FLASH_FLAG)) ;
/* Clear the flags */
FLASH->SR = FLASH_FLAG;
}
/*******************************************************************************
* Function Name : FLASH_GetStatus
* Description : Returns the FLASH Status.
* Input : None
* Output : None
* Return : FLASH Status: The returned value can be: FLASH_BUSY,
* FLASH_ERROR_PG or FLASH_ERROR_WRP or FLASH_COMPLETE
*******************************************************************************/
FLASH_Status FLASH_GetStatus(void)
{
FLASH_Status flashstatus = FLASH_COMPLETE;
if((FLASH->SR & FLASH_FLAG_BSY) == FLASH_FLAG_BSY)
{
flashstatus = FLASH_BUSY;
}
else
{
if(FLASH->SR & FLASH_FLAG_PGERR)
{
flashstatus = FLASH_ERROR_PG;
}
else
{
if(FLASH->SR & FLASH_FLAG_WRPRTERR)
{
flashstatus = FLASH_ERROR_WRP;
}
else
{
flashstatus = FLASH_COMPLETE;
}
}
}
/* Return the Flash Status */
return flashstatus;
}
/*******************************************************************************
* Function Name : FLASH_WaitForLastOperation
* Description : Waits for a Flash operation to complete or a TIMEOUT to occur.
* Input : - Timeout: FLASH progamming Timeout
* Output : None
* Return : FLASH Status: The returned value can be: FLASH_BUSY,
* FLASH_ERROR_PG or FLASH_ERROR_WRP or FLASH_COMPLETE or
* FLASH_TIMEOUT.
*******************************************************************************/
FLASH_Status FLASH_WaitForLastOperation(u32 Timeout)
{
FLASH_Status status = FLASH_COMPLETE;
/* Check for the Flash Status */
status = FLASH_GetStatus();
/* Wait for a Flash operation to complete or a TIMEOUT to occur */
while((status == FLASH_BUSY) && (Timeout != 0x00))
{
delay();
status = FLASH_GetStatus();
Timeout--;
}
if(Timeout == 0x00 )
{
status = FLASH_TIMEOUT;
}
/* Return the operation status */
return status;
}
/*******************************************************************************
* Function Name : delay
* Description : Inserts a time delay.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
static void delay(void)
{
vu32 i = 0;
for(i = 0xFF; i != 0; i--)
{
}
}
#endif
/******************* (C) COPYRIGHT 2007 STMicroelectronics *****END OF FILE****/