mpu_util.cpp File Reference

Detailed Description

Date

Jul 27, 2014

Author

Andrey Belomutskiy, (c) 2012-2020

Definition in file mpu_util.cpp.

Functions
bool	mcuCanFlashWhileRunning ()
size_t	flashSectorSize (flashsector_t sector)
	Get the size of sector.
uintptr_t	getFlashAddrFirstCopy ()
uintptr_t	getFlashAddrSecondCopy ()
void	stm32_standby ()

Function Documentation

flashSectorSize()

size_t flashSectorSize

(

flashsector_t

sector

)

Get the size of sector.

Returns

sector size in bytes.

Definition at line 15 of file mpu_util.cpp.

                                             {
    // sectors 0..11 are the 1st memory bank (1Mb), and 12..23 are the 2nd (the same structure).
    if (sector <= 3 || (sector >= 12 && sector <= 15))
        return 16 * 1024;
    else if (sector == 4 || sector == 16)
        return 64 * 1024;
    else if ((sector >= 5 && sector <= 11) || (sector >= 17 && sector <= 23))
        return 128 * 1024;
    return 0;
}

getFlashAddrFirstCopy()

uintptr_t getFlashAddrFirstCopy

(

void

)

Flex Non Volatile Memory is faster than flash It also has smaller pages so it takes less time to erase

There is no remote access to FlexNVM meaning that we cannot erase settings externally

Definition at line 28 of file mpu_util.cpp.

                                  {
    /* last 128K sector on 512K devices */
    if (TM_ID_GetFlashSize() <= 512)
        return 0x08060000;
    return 0x080E0000;
}

getFlashAddrSecondCopy()

uintptr_t getFlashAddrSecondCopy

(

void

)

Definition at line 35 of file mpu_util.cpp.

                                   {
    /* no second copy on 512K devices */
    if (TM_ID_GetFlashSize() <= 512)
        return 0x000000000;
    return 0x080C0000;
}

mcuCanFlashWhileRunning()

bool mcuCanFlashWhileRunning

(

)

Definition at line 10 of file mpu_util.cpp.

                               {
    // Never allow flash while running on F4, dual bank not implemented.
    return false;
}

stm32_standby()

void stm32_standby

(

)

Definition at line 46 of file mpu_util.cpp.

                     {
    // Don't get bothered by interrupts
    __disable_irq();
 
    SysTick->CTRL = 0;
    SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
    PWR->CR |= PWR_CR_PDDS; // PDDS = use standby mode (not stop mode)
    PWR->CR |= PWR_CR_CSBF; // Clear standby flag
 
    // Do anything the board wants to prepare for standby mode - enabling wakeup sources!
    boardPrepareForStandby();
 
    __WFI();
}

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