RMU

Detailed Description

Reset Management Unit (RMU) Peripheral API.

This module contains functions to control the RMU peripheral of Silicon Labs 32-bit MCUs and SoCs. The RMU ensures correct reset operation. It is responsible for connecting the different reset sources to the reset lines of the MCU or SoC.

Macros
#define	RMU_LockupResetDisable(A)   RMU_ResetControl(rmuResetLockUp, A)

Enumerations
enum	RMU_Reset_TypeDef {   rmuResetLockUp = _RMU_CTRL_LOCKUPRMODE_MASK,   rmuResetWdog = _RMU_CTRL_WDOGRMODE_MASK,   rmuResetCoreLockup = _RMU_CTRL_LOCKUPRMODE_MASK,   rmuResetSys = _RMU_CTRL_SYSRMODE_MASK,   rmuResetPin = _RMU_CTRL_PINRMODE_MASK }
enum	RMU_ResetMode_TypeDef {   rmuResetModeDisabled = _RMU_CTRL_PINRMODE_DISABLED,   rmuResetModeLimited = _RMU_CTRL_PINRMODE_LIMITED,   rmuResetModeExtended = _RMU_CTRL_PINRMODE_EXTENDED,   rmuResetModeFull = _RMU_CTRL_PINRMODE_FULL }

Functions
void	RMU_ResetCauseClear (void)
	Clear the reset cause register. More...
uint32_t	RMU_ResetCauseGet (void)
	Get the cause of the last reset. More...
void	RMU_ResetControl (RMU_Reset_TypeDef reset, RMU_ResetMode_TypeDef mode)
	Disable/enable reset for various peripherals and signal sources. More...
__STATIC_INLINE uint32_t	RMU_UserResetStateGet (void)
	Get user reset state. This state is reset only by a Power-on-reset and a pin reset. More...
__STATIC_INLINE void	RMU_UserResetStateSet (uint32_t userState)
	Set user reset state. This state is reset only by a Power-on-reset and a pin reset. More...

Macro Definition Documentation

#define RMU_LockupResetDisable

(

A

)

RMU_ResetControl(rmuResetLockUp, A)

RMU_LockupResetDisable kept for backwards compatibility

Definition at line 104 of file em_rmu.h.

Enumeration Type Documentation

enum RMU_Reset_TypeDef

RMU controlled peripheral reset control and reset source control

Enumerator
rmuResetLockUp	Cortex lockup reset select
rmuResetWdog	WDOG reset select
rmuResetCoreLockup	Cortex lockup reset select
rmuResetSys	SYSRESET select
rmuResetPin	Pin reset select

Definition at line 75 of file em_rmu.h.

enum RMU_ResetMode_TypeDef

RMU reset modes

Definition at line 61 of file em_rmu.h.

Function Documentation

void RMU_ResetCauseClear

(

void

)

Clear the reset cause register.

This function clears all the reset cause bits of the RSTCAUSE register. The reset cause bits must be cleared by SW before a new reset occurs, otherwise reset causes may accumulate. See RMU_ResetCauseGet().

Definition at line 249 of file em_rmu.c.

References BUS_RegBitWrite(), EMU, EMU_Lock(), EMU_LOCK_LOCKKEY_LOCKED, EMU_Unlock(), RMU, and RMU_CMD_RCCLR.

Referenced by SLEEP_Init().

uint32_t RMU_ResetCauseGet

(

void

)

Get the cause of the last reset.

In order to be useful, the reset cause must be cleared by software before a new reset occurs, otherwise reset causes may accumulate. See RMU_ResetCauseClear(). This function call will return the main cause for reset, which can be a bit mask (several causes), and clear away "noise".

Returns

Reset cause mask. Please consult the reference manual for description of the reset cause mask.

Definition at line 291 of file em_rmu.c.

References EMU_BASE, RMU, RMU_RSTCAUSE_AVDDBOD, RMU_RSTCAUSE_DECBOD, RMU_RSTCAUSE_DVDDBOD, RMU_RSTCAUSE_EM4RST, RMU_RSTCAUSE_EXTRST, RMU_RSTCAUSE_LOCKUPRST, RMU_RSTCAUSE_SYSREQRST, and RMU_RSTCAUSE_WDOGRST.

Referenced by SLEEP_Init().

void RMU_ResetControl	(	RMU_Reset_TypeDef	reset,
		RMU_ResetMode_TypeDef	mode
	)

Disable/enable reset for various peripherals and signal sources.

Parameters

[in]	reset	Reset types to enable/disable
[in]	mode	Reset mode

Definition at line 222 of file em_rmu.c.

References BUS_RegBitWrite(), RMU, and SL_CTZ().

__STATIC_INLINE uint32_t RMU_UserResetStateGet

(

void

)

Get user reset state. This state is reset only by a Power-on-reset and a pin reset.

Returns

Reset surviving user state

Definition at line 134 of file em_rmu.h.

References _RMU_CTRL_RESETSTATE_MASK, _RMU_CTRL_RESETSTATE_SHIFT, and RMU.

__STATIC_INLINE void RMU_UserResetStateSet

(

uint32_t

userState

)

Set user reset state. This state is reset only by a Power-on-reset and a pin reset.

Parameters

[in]

userState

User state to set

Definition at line 118 of file em_rmu.h.

References _RMU_CTRL_RESETSTATE_MASK, _RMU_CTRL_RESETSTATE_SHIFT, and RMU.