Energy Management Unit (EMU) Peripheral API. More...
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Data Structures | |
struct | EMU_EM23Init_TypeDef |
struct | EMU_EM4Init_TypeDef |
Defines | |
#define | EMU_EM23INIT_DEFAULT { false } |
#define | EMU_EM4INIT_DEFAULT |
Enumerations | |
enum | EMU_EM23VregMode |
enum | EMU_BODMode_TypeDef { emuBODMode_Active, emuBODMode_Inactive } |
Functions | |
__STATIC_INLINE void | EMU_EnterEM1 (void) |
Enter energy mode 1 (EM1). | |
void | EMU_EM23Init (EMU_EM23Init_TypeDef *em23Init) |
void | EMU_EM4Init (EMU_EM4Init_TypeDef *em4Init) |
Update EMU module with Energy Mode 4 configuration. | |
void | EMU_EnterEM2 (bool restore) |
Enter energy mode 2 (EM2). | |
void | EMU_EnterEM3 (bool restore) |
Enter energy mode 3 (EM3). | |
void | EMU_EnterEM4 (void) |
Enter energy mode 4 (EM4). | |
void | EMU_MemPwrDown (uint32_t blocks) |
Power down memory block. | |
void | EMU_UpdateOscConfig (void) |
Update EMU module with CMU oscillator selection/enable status. | |
__STATIC_INLINE void | EMU_Lock (void) |
Lock the EMU in order to protect all its registers against unintended modification. | |
__STATIC_INLINE void | EMU_Unlock (void) |
Unlock the EMU so that writing to locked registers again is possible. | |
__STATIC_INLINE void | EMU_EM2Block (void) |
Block entering EM2 or higher number energy modes. | |
__STATIC_INLINE void | EMU_EM2UnBlock (void) |
Unblock entering EM2 or higher number energy modes. |
Energy Management Unit (EMU) Peripheral API.
#define EMU_EM23INIT_DEFAULT { false } |
#define EMU_EM4INIT_DEFAULT |
{ false, /* Dont't lock configuration after it's been set */ \ false, /* No reset will be asserted due to Brownout when in EM4 */ \ emuEM4Osc_ULFRCO, /* Use default ULFRCO oscillator */ \ true, /* Wake up on EM4 BURTC interrupt */ \ true, /* Enable VREG */ \ }
Default initialization of EM4 configuration
enum EMU_BODMode_TypeDef |
__STATIC_INLINE void EMU_EM2Block | ( | void | ) |
Block entering EM2 or higher number energy modes.
Definition at line 446 of file em_emu.h.
References BITBAND_Peripheral().
__STATIC_INLINE void EMU_EM2UnBlock | ( | void | ) |
Unblock entering EM2 or higher number energy modes.
Definition at line 456 of file em_emu.h.
References BITBAND_Peripheral().
void EMU_EM4Init | ( | EMU_EM4Init_TypeDef * | em4Init | ) |
Update EMU module with Energy Mode 4 configuration.
[in] | em4Init | Energy Mode 4 configuration structure |
Definition at line 578 of file em_emu.c.
References EMU_EM4Init_TypeDef::buRtcWakeup, EMU_EM4Init_TypeDef::osc, and EMU_EM4Init_TypeDef::vreg.
__STATIC_INLINE void EMU_EnterEM1 | ( | void | ) |
void EMU_EnterEM2 | ( | bool | restore | ) |
Enter energy mode 2 (EM2).
When entering EM2, the high frequency clocks are disabled, ie HFXO, HFRCO and AUXHFRCO (for AUXHFRCO, see exception note below). When re-entering EM0, HFRCO is re-enabled and the core will be clocked by the configured HFRCO band. This ensures a quick wakeup from EM2.
However, prior to entering EM2, the core may have been using another oscillator than HFRCO. The restore
parameter gives the user the option to restore all HF oscillators according to state prior to entering EM2, as well as the clock used to clock the core. This restore procedure is handled by SW. However, since handled by SW, it will not be restored before completing the interrupt function(s) waking up the core!
restore
parameter.[in] | restore |
|
restore
option should only be used if all clock control is done via the CMU API. void EMU_EnterEM3 | ( | bool | restore | ) |
Enter energy mode 3 (EM3).
When entering EM3, the high frequency clocks are disabled by HW, ie HFXO, HFRCO and AUXHFRCO (for AUXHFRCO, see exception note below). In addition, the low frequency clocks, ie LFXO and LFRCO are disabled by SW. When re-entering EM0, HFRCO is re-enabled and the core will be clocked by the configured HFRCO band. This ensures a quick wakeup from EM3.
However, prior to entering EM3, the core may have been using another oscillator than HFRCO. The restore
parameter gives the user the option to restore all HF/LF oscillators according to state prior to entering EM3, as well as the clock used to clock the core. This restore procedure is handled by SW. However, since handled by SW, it will not be restored before completing the interrupt function(s) waking up the core!
restore
parameter.[in] | restore |
|
restore
option should only be used if all clock control is done via the CMU API. Definition at line 391 of file em_emu.c.
References CMU_Lock(), and CMU_Unlock().
void EMU_EnterEM4 | ( | void | ) |
Enter energy mode 4 (EM4).
Definition at line 471 of file em_emu.c.
References EMU_Unlock().
__STATIC_INLINE void EMU_Lock | ( | void | ) |
Lock the EMU in order to protect all its registers against unintended modification.
Definition at line 427 of file em_emu.h.
Referenced by RMU_ResetCauseClear().
void EMU_MemPwrDown | ( | uint32_t | blocks | ) |
Power down memory block.
[in] | blocks | Specifies a logical OR of bits indicating memory blocks to power down. Bit 0 selects block 1, bit 1 selects block 2, etc. Memory block 0 cannot be disabled. Please refer to the EFM32 reference manual for available memory blocks for a device. |
__STATIC_INLINE void EMU_Unlock | ( | void | ) |
Unlock the EMU so that writing to locked registers again is possible.
Definition at line 437 of file em_emu.h.
Referenced by EMU_EnterEM4(), and RMU_ResetCauseClear().
void EMU_UpdateOscConfig | ( | void | ) |
Update EMU module with CMU oscillator selection/enable status.
When entering EM2 and EM3, the HW may change the core clock oscillator used, as well as disabling some oscillators. The user may optionally select to restore the oscillators after waking up from EM2 and EM3 through the SW API.
However, in order to support this in a safe way, the EMU module must be kept up-to-date on the actual selected configuration. The CMU module must keep the EMU module up-to-date.
This function is mainly intended for internal use by the CMU module, but if the applications changes oscillator configurations without using the CMU API, this function can be used to keep the EMU module up-to-date.
Definition at line 544 of file em_emu.c.
Referenced by CMU_ClockSelectSet(), and CMU_OscillatorEnable().