/***************************************************************************//**
* @file
* @brief Energy management unit (EMU) peripheral API for EFM32.
* @author Energy Micro AS
* @version 2.3.2
*******************************************************************************
* @section License
* (C) Copyright 2010 Energy Micro AS, http://www.energymicro.com
*******************************************************************************
*
* This source code is the property of Energy Micro AS. The source and compiled
* code may only be used on Energy Micro "EFM32" microcontrollers.
*
* This copyright notice may not be removed from the source code nor changed.
*
* DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Energy Micro AS has no
* obligation to support this Software. Energy Micro AS is providing the
* Software "AS IS", with no express or implied warranties of any kind,
* including, but not limited to, any implied warranties of merchantability
* or fitness for any particular purpose or warranties against infringement
* of any proprietary rights of a third party.
*
* Energy Micro AS will not be liable for any consequential, incidental, or
* special damages, or any other relief, or for any claim by any third party,
* arising from your use of this Software.
*
******************************************************************************/
#ifndef __EFM32_EMU_H
#define __EFM32_EMU_H
#include
#include "efm32.h"
#include "efm32_bitband.h"
#ifdef __cplusplus
extern "C" {
#endif
/***************************************************************************//**
* @addtogroup EFM32_Library
* @{
******************************************************************************/
/***************************************************************************//**
* @addtogroup EMU
* @{
******************************************************************************/
/*******************************************************************************
******************************** ENUMS ************************************
******************************************************************************/
#if defined(_EFM32_GIANT_FAMILY)
/** EM4 duty oscillator */
typedef enum
{
/** Select ULFRCO as duty oscillator in EM4 */
emuEM4Osc_ULFRCO = EMU_EM4CONF_OSC_ULFRCO,
/** Select LFXO as duty oscillator in EM4 */
emuEM4Osc_LFXO = EMU_EM4CONF_OSC_LFXO,
/** Select LFRCO as duty oscillator in EM4 */
emuEM4Osc_LFRCO = EMU_EM4CONF_OSC_LFRCO
} EMU_EM4Osc_TypeDef;
/** Backup Power Voltage Probe types */
typedef enum
{
/** Disable voltage probe */
emuProbe_Disable = EMU_BUCTRL_PROBE_DISABLE,
/** Connect probe to VDD_DREG */
emuProbe_VDDDReg = EMU_BUCTRL_PROBE_VDDDREG,
/** Connect probe to BU_IN */
emuProbe_BUIN = EMU_BUCTRL_PROBE_BUIN,
/** Connect probe to BU_OUT */
emuProbe_BUOUT = EMU_BUCTRL_PROBE_BUOUT
} EMU_Probe_TypeDef;
/** Backup Power Domain resistor selection */
typedef enum
{
/** Main power and backup power connected with RES0 series resistance */
emuRes_Res0 = EMU_PWRCONF_PWRRES_RES0,
/** Main power and backup power connected with RES1 series resistance */
emuRes_Res1 = EMU_PWRCONF_PWRRES_RES1,
/** Main power and backup power connected with RES2 series resistance */
emuRes_Res2 = EMU_PWRCONF_PWRRES_RES2,
/** Main power and backup power connected with RES3 series resistance */
emuRes_Res3 = EMU_PWRCONF_PWRRES_RES3,
} EMU_Resistor_TypeDef;
/** Backup Power Domain power connection */
typedef enum
{
/** No connection between main and backup power */
emuPower_None = EMU_BUINACT_PWRCON_NONE,
/** Main power and backup power connected through diode,
allowing current from backup to main only */
emuPower_BUMain = EMU_BUINACT_PWRCON_BUMAIN,
/** Main power and backup power connected through diode,
allowing current from main to backup only */
emuPower_MainBU = EMU_BUINACT_PWRCON_MAINBU,
/** Main power and backup power connected without diode */
emuPower_NoDiode = EMU_BUINACT_PWRCON_NODIODE,
} EMU_Power_TypeDef;
#endif
/*******************************************************************************
******************************* STRUCTS ***********************************
******************************************************************************/
#if defined(_EFM32_GIANT_FAMILY)
/** Energy Mode 4 initialization structure */
typedef struct
{
/** Lock configuration of regulator, BOD and oscillator */
bool lockConfig;
/** EM4 duty oscillator */
EMU_EM4Osc_TypeDef osc;
/** Wake up on EM4 BURTC interrupt */
bool buRtcWakeup;
/** Enable EM4 voltage regulator */
bool vreg;
} EMU_EM4Init_TypeDef;
/** Default initialization of EM4 configuration */
#define EMU_EM4INIT_DEFAULT \
{ false, /* Dont't lock configuration after it's been set */ \
emuEM4Osc_ULFRCO, /* Use default ULFRCO oscillator */ \
true, /* Wake up on EM4 BURTC interrupt */ \
true, /* Enable VREG */ \
}
/** Backup Power Domain Initialization structure */
typedef struct
{
/* Backup Power Domain power configuration */
/** Voltage probe select, selects ADC voltage */
EMU_Probe_TypeDef probe;
/** Enable BOD calibration mode */
bool bodCal;
/** Enable BU_STAT status pin for active BU mode */
bool statusPinEnable;
/* Backup Power Domain connection configuration */
/** Power domain resistor */
EMU_Resistor_TypeDef resistor;
/** BU_VOUT strong enable */
bool voutStrong;
/** BU_VOUT medium enable */
bool voutMed;
/** BU_VOUT weak enable */
bool voutWeak;
/* Backup Power Domain inactive configuration */
/** Power connection, when not in Backup Mode */
EMU_Power_TypeDef inactivePower;
/** Threshold range for backup BOD sensing on VDD_DREG, when not in Backup Mode */
uint32_t inactiveThresRange;
/** Threshold for backup BOD sesning on VDD_DREG, when not in Backup Mode */
uint32_t inactiveThreshold;
/* Backup Power Domain active configuration */
/** Power connection, when in Backup Mode */
EMU_Power_TypeDef activePower;
/** Threshold range for backup BOD sensing when in Backup Mode */
uint32_t activeThresRange;
/** Threshold for backup BOD sesning on VDD_DREG, when in Backup Mode */
uint32_t activeThreshold;
/** Enable backup power domain, and release reset, enable BU_VIN pin */
bool enable;
} EMU_BUPDInit_TypeDef;
/** Default */
#define EMU_BUPDINIT_DEFAULT \
{ emuProbe_Disable, /* Do not enable voltage probe */ \
false, /* Disable BOD calibration mode */ \
false, /* Disable BU_STAT pin for backup mode indication */ \
\
emuRes_Res0, /* RES0 series resistance between main and backup power */ \
false, /* Don't enable strong switch */ \
false, /* Don't enable medium switch */ \
false, /* Don't enable weak switch */ \
\
emuPower_None, /* No connection between main and backup power (inactive mode) */ \
0, /* Default threshold range for backup BOD sense (inactive mode) */ \
0, /* Default threshold for backup BOD snese (inactive mode) */ \
\
emuPower_None, /* No connection between main and backup power (active mode) */ \
0, /* Default threshold range for backup BOD sense (active mode) */ \
0, /* Default threshold for backup BOD snese (active mode) */ \
\
true /* Enable BUPD enter on BOD, enable BU_VIN pin, release BU reset */ \
}
#endif
/*******************************************************************************
***************************** PROTOTYPES **********************************
******************************************************************************/
/***************************************************************************//**
* @brief
* Enter energy mode 1 (EM1).
******************************************************************************/
static __INLINE void EMU_EnterEM1(void)
{
/* Just enter Cortex-M3 sleep mode */
SCB->SCR &= ~SCB_SCR_SLEEPDEEP_Msk;
__WFI();
}
void EMU_EnterEM2(bool restore);
void EMU_EnterEM3(bool restore);
void EMU_EnterEM4(void);
void EMU_MemPwrDown(uint32_t blocks);
void EMU_UpdateOscConfig(void);
#if defined(_EFM32_GIANT_FAMILY)
void EMU_EM4Init(EMU_EM4Init_TypeDef *em4init);
void EMU_BUPDInit(EMU_BUPDInit_TypeDef *budpdInit);
/***************************************************************************//**
* @brief
* Disable BU_VIN support
* @param[in] enable
* If true, enables BU_VIN input pin support, if false disables it
******************************************************************************/
static __INLINE void EMU_BUPinEnable(bool enable)
{
BITBAND_Peripheral(&(EMU->ROUTE), _EMU_ROUTE_BUVINPEN_SHIFT, enable);
}
#endif
/***************************************************************************//**
* @brief
* Lock the EMU in order to protect all its registers against unintended
* modification.
*
* @note
* If locking the EMU registers, they must be unlocked prior to using any
* EMU API functions modifying EMU registers. An exception to this is the
* energy mode entering API (EMU_EnterEMn()), which can be used when the
* EMU registers are locked.
******************************************************************************/
static __INLINE void EMU_Lock(void)
{
EMU->LOCK = EMU_LOCK_LOCKKEY_LOCK;
}
/***************************************************************************//**
* @brief
* Unlock the EMU so that writing to locked registers again is possible.
******************************************************************************/
static __INLINE void EMU_Unlock(void)
{
EMU->LOCK = EMU_LOCK_LOCKKEY_UNLOCK;
}
/***************************************************************************//**
* @brief
* Block entering EM2 or higher number energy modes.
******************************************************************************/
static __INLINE void EMU_EM2Block(void)
{
BITBAND_Peripheral(&(EMU->CTRL), _EMU_CTRL_EM2BLOCK_SHIFT, 1U);
}
/***************************************************************************//**
* @brief
* Unblock entering EM2 or higher number energy modes.
******************************************************************************/
static __INLINE void EMU_EM2UnBlock(void)
{
BITBAND_Peripheral(&(EMU->CTRL), _EMU_CTRL_EM2BLOCK_SHIFT, 0U);
}
/** @} (end addtogroup EMU) */
/** @} (end addtogroup EFM32_Library) */
#ifdef __cplusplus
}
#endif
#endif /* __EFM32_EMU_H */