Overview

The MCUXpresso SDK provides a peripheral driver for the Multicore System Mode Controller (MSMC) module of MCUXpresso SDK devices.

Typical use case

Set Core 0 from RUN to VLPR mode

Refer to the driver examples codes located at <SDK_ROOT>/boards/<BOARD>/driver_examples/msmc

Set Core 0 from VLPR/HSRUN to RUN mode

Refer to the driver examples codes located at <SDK_ROOT>/boards/<BOARD>/driver_examples/msmc

Typical use case

Set Core 0 from RUN to HSRUN mode

Refer to the driver examples codes located at <SDK_ROOT>/boards/<BOARD>/driver_examples/msmc

Enter wait or stop modes

SMC driver provides APIs to set MCU to different wait modes and stop modes. At the same time, there are pre-function and post-function for the modes setting. The pre-function and post-function are used for:

Disable/enable the interrupt through PRIMASK. In practise, there is such scenario: the application sets the wakeup interrupt and calls SMC function SMC_SetPowerModeStop to set MCU to STOP mode, but the wakeup interrupt happens so quickly that the ISR completed before the function SMC_SetPowerModeStop, as a result, the MCU enters STOP mode and never be wakeup by the interrupt. In this case, application could first disable interrupt through PRIMASK, then set the wakeup interrupt and enter STOP mode. After wakeup, the first thing is enable the interrupt through PRIMASK. The MCU could still be wakeup when disable interrupt through PRIMASK. The pre- and post- functions handle the PRIMASK inside.

SMC_PreEnterStopModes();
/* Enable the wakeup interrupt here. */
SMC_SetPowerModeStop(SMC0, kSMC_PartialStop);
SMC_PostExitStopModes();

For other use cases, please refer to the comments of the MSMC driver header file. Some example codes are also provided.

Files
file	fsl_msmc.h

Data Structures
struct	smc_reset_pin_filter_config_t
	Reset pin filter configuration. More...

Enumerations
enum	smc_power_mode_protection_t { kSMC_AllowPowerModeVlls = SMC_PMPROT_AVLLS_MASK, kSMC_AllowPowerModeLls = SMC_PMPROT_ALLS_MASK, kSMC_AllowPowerModeVlp = SMC_PMPROT_AVLP_MASK, kSMC_AllowPowerModeHsrun = SMC_PMPROT_AHSRUN_MASK, kSMC_AllowPowerModeAll }
	Power Modes Protection. More...

enum	smc_power_state_t { kSMC_PowerStateRun = 1U, kSMC_PowerStateStop = 1U << 1U, kSMC_PowerStateVlpr = 1U << 2U, kSMC_PowerStateHsrun = 1U << 7U }
	Power Modes in PMSTAT. More...

enum	smc_power_stop_entry_status_t { kSMC_PowerStopEntryAlt0 = 1U, kSMC_PowerStopEntryAlt1 = 1U << 1, kSMC_PowerStopEntryAlt2 = 1U << 2, kSMC_PowerStopEntryAlt3 = 1U << 3, kSMC_PowerStopEntryAlt4 = 1U << 4, kSMC_PowerStopEntryAlt5 = 1U << 5 }
	Power Stop Entry Status in PMSTAT. More...

enum	smc_run_mode_t { kSMC_RunNormal = 0U, kSMC_RunVlpr = 2U, kSMC_Hsrun = 3U }
	Run mode definition. More...

enum	smc_stop_mode_t { kSMC_StopNormal = 0U, kSMC_StopVlps = 2U, kSMC_StopLls = 3U, kSMC_StopVlls = 4U }
	Stop mode definition. More...

enum	smc_partial_stop_option_t { kSMC_PartialStop = 0U, kSMC_PartialStop1 = 1U, kSMC_PartialStop2 = 2U, kSMC_PartialStop3 = 3U }
	Partial STOP option. More...

enum	_smc_status { kStatus_SMC_StopAbort = MAKE_STATUS(kStatusGroup_POWER, 0) }
	SMC configuration status. More...

enum	smc_reset_source_t { kSMC_SourceWakeup = SMC_SRS_WAKEUP_MASK, kSMC_SourcePor = SMC_SRS_POR_MASK, kSMC_SourceLvd = SMC_SRS_LVD_MASK, kSMC_SourceHvd = SMC_SRS_HVD_MASK, kSMC_SourceWarm = SMC_SRS_WARM_MASK, kSMC_SourceFatal = SMC_SRS_FATAL_MASK, kSMC_SourceCore, kSMC_SourcePin = SMC_SRS_PIN_MASK, kSMC_SourceMdm = SMC_SRS_MDM_MASK, kSMC_SourceRstAck = SMC_SRS_RSTACK_MASK, kSMC_SourceStopAck = SMC_SRS_STOPACK_MASK, kSMC_SourceScg = SMC_SRS_SCG_MASK, kSMC_SourceWdog = SMC_SRS_WDOG_MASK, kSMC_SourceSoftware = SMC_SRS_SW_MASK, kSMC_SourceLockup = SMC_SRS_LOCKUP_MASK, kSMC_SourceJtag = SMC_SRS_JTAG_MASK , kSMC_SourceSecVio = SMC_SRS_SECVIO_MASK, kSMC_SourceTamper = SMC_SRS_TAMPER_MASK, kSMC_SourceCore0 = SMC_SRS_CORE0_MASK, kSMC_SourceCore1 = SMC_SRS_CORE1_MASK }
	System Reset Source Name definitions. More...

enum	smc_interrupt_enable_t { kSMC_IntNone = 0U, kSMC_IntPin = SMC_SRIE_PIN_MASK, kSMC_IntMdm = SMC_SRIE_MDM_MASK, kSMC_IntStopAck = SMC_SRIE_STOPACK_MASK, kSMC_IntWdog = SMC_SRIE_WDOG_MASK, kSMC_IntSoftware = SMC_SRIE_SW_MASK, kSMC_IntLockup = SMC_SRIE_LOCKUP_MASK , kSMC_IntAll }
	System reset interrupt enable bit definitions. More...

Driver version
#define	FSL_MSMC_DRIVER_VERSION (MAKE_VERSION(2, 1, 1))
	MSMC driver version. More...

System mode controller APIs
static void	SMC_SetPowerModeProtection (SMC_Type *base, uint8_t allowedModes)
	Configures all power mode protection settings. More...

static smc_power_state_t	SMC_GetPowerModeState (SMC_Type *base)
	Gets the current power mode status. More...

static void	SMC_PreEnterStopModes (void)
	Prepare to enter stop modes. More...

static void	SMC_PostExitStopModes (void)
	Recovering after wake up from stop modes. More...

static void	SMC_PreEnterWaitModes (void)
	Prepare to enter wait modes. More...

static void	SMC_PostExitWaitModes (void)
	Recovering after wake up from stop modes. More...

status_t	SMC_SetPowerModeRun (SMC_Type *base)
	Configure the system to RUN power mode. More...

status_t	SMC_SetPowerModeHsrun (SMC_Type *base)
	Configure the system to HSRUN power mode. More...

status_t	SMC_SetPowerModeWait (SMC_Type *base)
	Configure the system to WAIT power mode. More...

status_t	SMC_SetPowerModeStop (SMC_Type *base, smc_partial_stop_option_t option)
	Configure the system to Stop power mode. More...

status_t	SMC_SetPowerModeVlpr (SMC_Type *base)
	Configure the system to VLPR power mode. More...

status_t	SMC_SetPowerModeVlpw (SMC_Type *base)
	Configure the system to VLPW power mode. More...

status_t	SMC_SetPowerModeVlps (SMC_Type *base)
	Configure the system to VLPS power mode. More...

status_t	SMC_SetPowerModeLls (SMC_Type *base)
	Configure the system to LLS power mode. More...

status_t	SMC_SetPowerModeVlls (SMC_Type *base)
	Configure the system to VLLS power mode. More...

static uint32_t	SMC_GetPreviousResetSources (SMC_Type *base)
	Gets the reset source status which caused a previous reset. More...

static uint32_t	SMC_GetStickyResetSources (SMC_Type *base)
	Gets the sticky reset source status. More...

static void	SMC_ClearStickyResetSources (SMC_Type *base, uint32_t sourceMasks)
	Clears the sticky reset source status. More...

void	SMC_ConfigureResetPinFilter (SMC_Type base, const smc_reset_pin_filter_config_t config)
	Configures the reset pin filter. More...

static void	SMC_SetSystemResetInterruptConfig (SMC_Type *base, uint32_t intMask)
	Sets the system reset interrupt configuration. More...

static uint32_t	SMC_GetResetInterruptSourcesStatus (SMC_Type *base)
	Gets the source status of the system reset interrupt. More...

static void	SMC_ClearResetInterruptSourcesStatus (SMC_Type *base, uint32_t intMask)
	Clears the source status of the system reset interrupt. More...

static void	SMC_SetCoreSoftwareResetConfig (SMC_Type *base, uint32_t intMask)
	Sets the core software reset feature configuration. More...

static uint32_t	SMC_GetBootOptionConfig (SMC_Type *base)
	Gets the boot option configuration. More...

Data Structure Documentation

struct smc_reset_pin_filter_config_t

Data Fields
uint8_t	slowClockFilterCount
	Reset pin bus clock filter width from 1 to 32 slow clock cycles. More...

bool	enableFilter
	Reset pin filter enable/disable. More...

Field Documentation

uint8_t smc_reset_pin_filter_config_t::slowClockFilterCount

bool smc_reset_pin_filter_config_t::enableFilter

Macro Definition Documentation

#define FSL_MSMC_DRIVER_VERSION (MAKE_VERSION(2, 1, 1))

Enumeration Type Documentation

enum smc_power_mode_protection_t

Enumerator
kSMC_AllowPowerModeVlls	Allow Very-Low-Leakage Stop Mode.
kSMC_AllowPowerModeLls	Allow Low-Leakage Stop Mode.
kSMC_AllowPowerModeVlp	Allow Very-Low-Power Mode.
kSMC_AllowPowerModeHsrun	Allow High Speed Run mode.
kSMC_AllowPowerModeAll	Allow all power mode.

enum smc_power_state_t

Enumerator
kSMC_PowerStateRun	0000_0001 - Current power mode is RUN
kSMC_PowerStateStop	0000_0010 - Current power mode is any STOP mode
kSMC_PowerStateVlpr	0000_0100 - Current power mode is VLPR
kSMC_PowerStateHsrun	1000_0000 - Current power mode is HSRUN

enum smc_power_stop_entry_status_t

Enumerator
kSMC_PowerStopEntryAlt0	Indicates a Stop mode entry since this field was last cleared.
kSMC_PowerStopEntryAlt1	Indicates the system bus masters acknowledged the Stop mode entry.
kSMC_PowerStopEntryAlt2	Indicates the system clock peripherals acknowledged the Stop mode entry.
kSMC_PowerStopEntryAlt3	Indicates the bus clock peripherals acknowledged the Stop mode entry.
kSMC_PowerStopEntryAlt4	Indicates the slow clock peripherals acknowledged the Stop mode entry.
kSMC_PowerStopEntryAlt5	Indicates Stop mode entry completed.

enum smc_run_mode_t

Enumerator
kSMC_RunNormal	normal RUN mode.
kSMC_RunVlpr	Very-Low-Power RUN mode.
kSMC_Hsrun	High Speed Run mode (HSRUN).

enum smc_stop_mode_t

Enumerator
kSMC_StopNormal	Normal STOP mode.
kSMC_StopVlps	Very-Low-Power STOP mode.
kSMC_StopLls	Low-Leakage Stop mode.
kSMC_StopVlls	Very-Low-Leakage Stop mode.

enum smc_partial_stop_option_t

Enumerator
kSMC_PartialStop	STOP - Normal Stop mode.
kSMC_PartialStop1	Partial Stop with both system and bus clocks disabled.
kSMC_PartialStop2	Partial Stop with system clock disabled and bus clock enabled.
kSMC_PartialStop3	Partial Stop with system clock enabled and bus clock disabled.

enum _smc_status

Enumerator
kStatus_SMC_StopAbort	Entering Stop mode is abort.

enum smc_reset_source_t

Enumerator
kSMC_SourceWakeup	Very low-leakage wakeup reset.
kSMC_SourcePor	Power on reset.
kSMC_SourceLvd	Low-voltage detect reset.
kSMC_SourceHvd	High-voltage detect reset.
kSMC_SourceWarm	Warm reset. Warm Reset flag will assert if any of the system reset sources in this register assert (SRS[31:8])
kSMC_SourceFatal	Fatal reset.
kSMC_SourceCore	Software reset that only reset the core, NOT a sticky system reset source.
kSMC_SourcePin	RESET_B pin reset.
kSMC_SourceMdm	MDM reset.
kSMC_SourceRstAck	Reset Controller timeout reset.
kSMC_SourceStopAck	Stop timeout reset.
kSMC_SourceScg	SCG loss of lock or loss of clock.
kSMC_SourceWdog	Watchdog reset.
kSMC_SourceSoftware	Software reset.
kSMC_SourceLockup	Lockup reset. Core lockup or exception.
kSMC_SourceJtag	JTAG system reset.
kSMC_SourceSecVio	Security violation reset.
kSMC_SourceTamper	Tamper reset.
kSMC_SourceCore0	Core0 System Reset.
kSMC_SourceCore1	Core1 System Reset.

enum smc_interrupt_enable_t

Enumerator
kSMC_IntNone	No interrupt enabled.
kSMC_IntPin	Pin reset interrupt.
kSMC_IntMdm	MDM reset interrupt.
kSMC_IntStopAck	Stop timeout reset interrupt.
kSMC_IntWdog	Watchdog interrupt.
kSMC_IntSoftware	Software reset interrupts.
kSMC_IntLockup	Lock up interrupt.
kSMC_IntAll	All system reset interrupts.

Function Documentation

static void SMC_SetPowerModeProtection	(	SMC_Type *	base,
		uint8_t	allowedModes
	)

inlinestatic

This function configures the power mode protection settings for supported power modes in the specified chip family. The available power modes are defined in the smc_power_mode_protection_t. This should be done at an early system level initialization stage. See the reference manual for details. This register can only write once after the power reset.

The allowed modes are passed as bit map, for example, to allow LLS and VLLS, use SMC_SetPowerModeProtection(kSMC_AllowPowerModeLls | kSMC_AllowPowerModeVlls). To allow all modes, use SMC_SetPowerModeProtection(kSMC_AllowPowerModeAll).

Parameters

allowedModes Bitmap of the allowed power modes.

static smc_power_state_t SMC_GetPowerModeState ( SMC_Type * base )

inlinestatic

This function returns the current power mode stat. Once application switches the power mode, it should always check the stat to check whether it runs into the specified mode or not. An application should check this mode before switching to a different mode. The system requires that only certain modes can switch to other specific modes. See the reference manual for details and the smc_power_state_t for information about the power stat.

Parameters

base	SMC peripheral base address.

Returns: Current power mode status.

static void SMC_PreEnterStopModes ( void )

inlinestatic

This function should be called before entering STOP/VLPS/LLS/VLLS modes.

static void SMC_PostExitStopModes ( void )

inlinestatic

This function should be called after wake up from STOP/VLPS/LLS/VLLS modes. It is used together with SMC_PreEnterStopModes.

static void SMC_PreEnterWaitModes ( void )

inlinestatic

This function should be called before entering WAIT/VLPW modes..

static void SMC_PostExitWaitModes ( void )

inlinestatic

This function should be called after wake up from WAIT/VLPW modes. It is used together with SMC_PreEnterWaitModes.

status_t SMC_SetPowerModeRun ( SMC_Type * base )

Parameters

base	SMC peripheral base address.

Returns: SMC configuration error code.

status_t SMC_SetPowerModeHsrun ( SMC_Type * base )

Parameters

base	SMC peripheral base address.

Returns: SMC configuration error code.

status_t SMC_SetPowerModeWait ( SMC_Type * base )

Parameters

base	SMC peripheral base address.

Returns: SMC configuration error code.

status_t SMC_SetPowerModeStop	(	SMC_Type *	base,
		smc_partial_stop_option_t	option
	)

Parameters

base	SMC peripheral base address.
option	Partial Stop mode option.

Returns: SMC configuration error code.

status_t SMC_SetPowerModeVlpr ( SMC_Type * base )

Parameters

base	SMC peripheral base address.

Returns: SMC configuration error code.

status_t SMC_SetPowerModeVlpw ( SMC_Type * base )

Parameters

base	SMC peripheral base address.

Returns: SMC configuration error code.

status_t SMC_SetPowerModeVlps ( SMC_Type * base )

Parameters

base	SMC peripheral base address.

Returns: SMC configuration error code.

status_t SMC_SetPowerModeLls ( SMC_Type * base )

Parameters

base	SMC peripheral base address.

Returns: SMC configuration error code.

status_t SMC_SetPowerModeVlls ( SMC_Type * base )

Parameters

base	SMC peripheral base address.

Returns: SMC configuration error code.

static uint32_t SMC_GetPreviousResetSources ( SMC_Type * base )

inlinestatic

This function gets the current reset source status. Use source masks defined in the smc_reset_source_t to get the desired source status.

Example: To get all reset source statuses.

resetStatus = SMC_GetPreviousResetSources(SMC0) & kSMC_SourceAll;

Example: To test whether the MCU is reset using Watchdog.

uint32_t resetStatus;
resetStatus = SMC_GetPreviousResetSources(SMC0) & kSMC_SourceWdog;

Example: To test multiple reset sources. uint32_t resetStatus;

resetStatus = SMC_GetPreviousResetSources(SMC0) & (kSMC_SourceWdog | kSMC_SourcePin);

Parameters

base	SMC peripheral base address.

Returns: All reset source status bit map.

static uint32_t SMC_GetStickyResetSources ( SMC_Type * base )

inlinestatic

This function gets the current reset source status that has not been cleared by software for some specific source.

Example: To get all reset source statuses.

uint32_t resetStatus;
resetStatus = SMC_GetStickyResetSources(SMC0) & kSMC_SourceAll;

Example, To test whether the MCU is reset using Watchdog.

uint32_t resetStatus;
resetStatus = SMC_GetStickyResetSources(SMC0) & kSMC_SourceWdog;

Example To test multiple reset sources.

uint32_t resetStatus;
resetStatus = SMC_GetStickyResetSources(SMC0) & (kSMC_SourceWdog | kSMC_SourcePin);

Parameters

base	SMC peripheral base address.

Returns: All reset source status bit map.

static void SMC_ClearStickyResetSources	(	SMC_Type *	base,
		uint32_t	sourceMasks
	)

inlinestatic

This function clears the sticky system reset flags indicated by source masks.

Example: Clears multiple reset sources.

SMC_ClearStickyResetSources(SMC0, (kSMC_SourceWdog | kSMC_SourcePin));

Parameters

base	SMC peripheral base address.
sourceMasks	reset source status bit map

void SMC_ConfigureResetPinFilter	(	SMC_Type *	base,
		const smc_reset_pin_filter_config_t *	config
	)

This function sets the reset pin filter including the enablement/disablement and filter width.

Parameters

base	SMC peripheral base address.
config	Pointer to the configuration structure.

static void SMC_SetSystemResetInterruptConfig	(	SMC_Type *	base,
		uint32_t	intMask
	)

inlinestatic

For a graceful shut down, the MSMC supports delaying the assertion of the system reset for a period of time when the reset interrupt is generated. This function can be used to enable the interrupt. The interrupts are passed in as bit mask. See smc_interrupt_enable_t for details. For example, to delay a reset after the WDOG timeout or PIN reset occurs, configure as follows: SMC_SetSystemResetInterruptConfig(SMC0, (kSMC_IntWdog | kSMC_IntPin));

Parameters

base	SMC peripheral base address.
intMask	Bit mask of the system reset interrupts to enable. See smc_interrupt_enable_t for details.

static uint32_t SMC_GetResetInterruptSourcesStatus ( SMC_Type * base )

inlinestatic

This function gets the source status of the reset interrupt. Use source masks defined in the smc_interrupt_enable_t to get the desired source status.

Example: To get all reset interrupt source statuses.

uint32_t interruptStatus;
interruptStatus = SMC_GetResetInterruptSourcesStatus(SMC0) & kSMC_IntAll;

Example: To test whether the reset interrupt of Watchdog is pending.

uint32_t interruptStatus;
interruptStatus = SMC_GetResetInterruptSourcesStatus(SMC0) & kSMC_IntWdog;

Example: To test multiple reset interrupt sources.

uint32_t interruptStatus;
interruptStatus = SMC_GetResetInterruptSourcesStatus(SMC0) & (kSMC_IntWdog | kSMC_IntPin);

Parameters

base	SMC peripheral base address.

Returns: All reset interrupt source status bit map.

static void SMC_ClearResetInterruptSourcesStatus	(	SMC_Type *	base,
		uint32_t	intMask
	)

inlinestatic

This function clears the source status of the reset interrupt. Use source masks defined in the smc_interrupt_enable_t to get the desired source status.

Example: To clear all reset interrupt source statuses.

uint32_t interruptStatus;
MMC_ClearResetInterruptSourcesStatus(SMC0, kSMC_IntAll);

Example, To clear the reset interrupt of Watchdog.

uint32_t interruptStatus;
SMC_ClearResetInterruptSourcesStatus(SMC0, kSMC_IntWdog);

Example, To clear multiple reset interrupt sources status.

uint32_t interruptStatus;
SMC_ClearResetInterruptSourcesStatus(SMC0, (kSMC_IntWdog | kSMC_IntPin));

Parameters

base	SMC peripheral base address.
All	reset interrupt source status bit map to clear.

static void SMC_SetCoreSoftwareResetConfig	(	SMC_Type *	base,
		uint32_t	intMask
	)

inlinestatic

The MSMC supports delaying the assertion of the system reset for a period of time while a core software reset is generated. This allows software to recover without reseting the entire system. This function can be used to enable/disable the core software reset feature. The interrupts are passed in as bit mask. See smc_interrupt_enable_t for details. For example, to delay a system after the WDOG timeout or PIN core software reset occurs, configure as follows: SMC_SetCoreSoftwareResetConfig(SMC0, (kSMC_IntWdog | kSMC_IntPin));

Parameters

base	SMC peripheral base address.
intMask	Bit mask of the core software reset to enable. See smc_interrupt_enable_t for details.

static uint32_t SMC_GetBootOptionConfig ( SMC_Type * base )

inlinestatic

This function gets the boot option configuration of MSMC.

Parameters

base	SMC peripheral base address.

Returns: The boot option configuration. 1 means boot option enabled. 0 means not.

Overview

Typical use case

Set Core 0 from RUN to VLPR mode

Set Core 0 from VLPR/HSRUN to RUN mode

Typical use case

Set Core 0 from RUN to HSRUN mode

Enter wait or stop modes

Files

Data Structures

Enumerations

Driver version

System mode controller APIs

Data Structure Documentation

Data Fields

Field Documentation

Macro Definition Documentation

Enumeration Type Documentation

Function Documentation