/***************************************************************************//** * @file * @brief Low Energy Sensor (LESENSE) peripheral API for EFM32 TG/GG devices. * @author Energy Micro AS * @version 2.3.0 ******************************************************************************* * @section License * (C) Copyright 2011 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_LESENSE_H #define __EFM32_LESENSE_H #include "efm32.h" #if defined(LESENSE_COUNT) && (LESENSE_COUNT > 0) #include #include #ifdef __cplusplus extern "C" { #endif /***************************************************************************//** * @addtogroup EFM32_Library * @{ ******************************************************************************/ /***************************************************************************//** * @addtogroup LESENSE * @{ ******************************************************************************/ /** @cond DO_NOT_INCLUDE_WITH_DOXYGEN */ /** @endcond */ /******************************************************************************* ******************************** ENUMS ************************************ ******************************************************************************/ /** Clock divisors for controlling the prescaling factor of the period * counter. * Note: these enumeration values are being used for different clock division * related configuration parameters (hfPresc, lfPresc, pcPresc). */ typedef enum { lesenseClkDiv_1 = 0, /**< Divide clock by 1. */ lesenseClkDiv_2 = 1, /**< Divide clock by 2. */ lesenseClkDiv_4 = 2, /**< Divide clock by 4. */ lesenseClkDiv_8 = 3, /**< Divide clock by 8. */ lesenseClkDiv_16 = 4, /**< Divide clock by 16. */ lesenseClkDiv_32 = 5, /**< Divide clock by 32. */ lesenseClkDiv_64 = 6, /**< Divide clock by 64. */ lesenseClkDiv_128 = 7 /**< Divide clock by 128. */ } LESENSE_ClkPresc_TypeDef; /** Scan modes. */ typedef enum { /** New scan is started each time the period counter overflows. */ lesenseScanStartPeriodic = LESENSE_CTRL_SCANMODE_PERIODIC, /** Single scan is performed when LESENSE_ScanStart() is called. */ lesenseScanStartOneShot = LESENSE_CTRL_SCANMODE_ONESHOT, /** New scan is triggered by pulse on PRS channel. */ lesenseScanStartPRS = LESENSE_CTRL_SCANMODE_PRS } LESENSE_ScanMode_TypeDef; /** PRS sources. * Note: these enumeration values are being used for different PRS related * configuration parameters. */ typedef enum { lesensePRSCh0 = 0, /**< PRS channel 0. */ lesensePRSCh1 = 1, /**< PRS channel 1. */ lesensePRSCh2 = 2, /**< PRS channel 2. */ lesensePRSCh3 = 3, /**< PRS channel 3. */ lesensePRSCh4 = 4, /**< PRS channel 4. */ lesensePRSCh5 = 5, /**< PRS channel 5. */ lesensePRSCh6 = 6, /**< PRS channel 6. */ lesensePRSCh7 = 7 /**< PRS channel 7. */ } LESENSE_PRSSel_TypeDef; /** Locations of the alternate excitation function. */ typedef enum { /** Alternate excitation is mapped to the LES_ALTEX pins. */ lesenseAltExMapALTEX = LESENSE_CTRL_ALTEXMAP_ALTEX, /** Alternate excitation is mapped to the pins of the other ACMP. */ lesenseAltExMapACMP = LESENSE_CTRL_ALTEXMAP_ACMP } LESENSE_AltExMap_TypeDef; /** Result buffer interrupt and DMA trigger levels. */ typedef enum { /** DMA and interrupt flags are set when result buffer is halffull. */ lesenseBufTrigHalf = LESENSE_CTRL_BUFIDL_HALFFULL, /** DMA and interrupt flags set when result buffer is full. */ lesenseBufTrigFull = LESENSE_CTRL_BUFIDL_FULL } LESENSE_BufTrigLevel_TypeDef; /** Modes of operation for DMA wakeup from EM2. */ typedef enum { /** No DMA wakeup from EM2. */ lesenseDMAWakeUpDisable = LESENSE_CTRL_DMAWU_DISABLE, /** DMA wakeup from EM2 when data is valid in the result buffer. */ lesenseDMAWakeUpBufValid = LESENSE_CTRL_DMAWU_BUFDATAV, /** DMA wakeup from EM2 when the resultbuffer is full/halffull, depending on * RESBIDL configuration in LESENSE_CTRL register (selected by * resBufTrigLevel in LESENSE_ResBufTrigLevel_TypeDef descriptor structure). */ lesenseDMAWakeUpBufLevel = LESENSE_CTRL_DMAWU_BUFLEVEL } LESENSE_DMAWakeUp_TypeDef; /** Bias modes. */ typedef enum { /** Duty cycle bias module between low power and high accuracy mode. */ lesenseBiasModeDutyCycle = LESENSE_BIASCTRL_BIASMODE_DUTYCYCLE, /** Bias module is always in high accuracy mode. */ lesenseBiasModeHighAcc = LESENSE_BIASCTRL_BIASMODE_HIGHACC, /** Bias module is controlled by the EMU and not affected by LESENSE. */ lesenseBiasModeDontTouch = LESENSE_BIASCTRL_BIASMODE_DONTTOUCH } LESENSE_BiasMode_TypeDef; /** Scan configuration. */ typedef enum { /** The channel configuration registers (CHx_CONF) used are directly mapped to * the channel number. */ lesenseScanConfDirMap = LESENSE_CTRL_SCANCONF_DIRMAP, /** The channel configuration registers used are CHx+8_CONF for channels 0-7 * and CHx-8_CONF for channels 8-15. */ lesenseScanConfInvMap = LESENSE_CTRL_SCANCONF_INVMAP, /** The channel configuration registers used toggles between CHX_SCANCONF and * CHX+8_SCANCONF when channel x triggers. */ lesenseScanConfToggle = LESENSE_CTRL_SCANCONF_TOGGLE, /** The decoder state defines the channel configuration register (CHx_CONF) to * be used. */ lesenseScanConfDecDef = LESENSE_CTRL_SCANCONF_DECDEF } LESENSE_ScanConfSel_TypeDef; /** DAC CHx data control configuration. */ typedef enum { /** DAC channel x data is defined by DAC_CHxDATA register. * Note: this value could be used for both DAC Ch0 and Ch1. */ lesenseDACIfData = _LESENSE_PERCTRL_DACCH0DATA_DACDATA, /** DAC channel x data is defined by ACMPTHRES in LESENSE_CHx_INTERACT. * Note: this value could be used for both DAC Ch0 and Ch1. */ lesenseACMPThres = _LESENSE_PERCTRL_DACCH0DATA_ACMPTHRES } LESENSE_ControlDACData_TypeDef; /** DAC channel x conversion mode configuration. */ typedef enum { /** LESENSE doesn't control DAC channel x. * Note: this value could be used for both DAC Ch0 and Ch1. */ lesenseDACConvModeDisable = _LESENSE_PERCTRL_DACCH0CONV_DISABLE, /** DAC channel x is driven in continuous mode. * Note: this value could be used for both DAC Ch0 and Ch1. */ lesenseDACConvModeContinuous = _LESENSE_PERCTRL_DACCH0CONV_CONTINUOUS, /** DAC channel x is driven in sample hold mode. * Note: this value could be used for both DAC Ch0 and Ch1. */ lesenseDACConvModeSampleHold = _LESENSE_PERCTRL_DACCH0CONV_SAMPLEHOLD, /** DAC channel x is driven in sample off mode. * Note: this value could be used for both DAC Ch0 and Ch1. */ lesenseDACConvModeSampleOff = _LESENSE_PERCTRL_DACCH0CONV_SAMPLEOFF } LESENSE_ControlDACConv_TypeDef; /** DAC channel x output mode configuration. */ typedef enum { /** DAC CHx output to pin and ACMP/ADC disabled. * Note: this value could be used for both DAC Ch0 and Ch1. */ lesenseDACOutModeDisable = _LESENSE_PERCTRL_DACCH0OUT_DISABLE, /** DAC CHx output to pin enabled, output to ADC and ACMP disabled. * Note: this value could be used for both DAC Ch0 and Ch1. */ lesenseDACOutModePin = _LESENSE_PERCTRL_DACCH0OUT_PIN, /** DAC CHx output to pin disabled, output to ADC and ACMP enabled. * Note: this value could be used for both DAC Ch0 and Ch1. */ lesenseDACOutModeADCACMP = _LESENSE_PERCTRL_DACCH0OUT_ADCACMP, /** DAC CHx output to pin, ADC, and ACMP enabled. * Note: this value could be used for both DAC Ch0 and Ch1. */ lesenseDACOutModePinADCACMP = _LESENSE_PERCTRL_DACCH0OUT_PINADCACMP } LESENSE_ControlDACOut_TypeDef; /** DAC reference configuration. */ typedef enum { /** DAC uses VDD reference. */ lesenseDACRefVdd = LESENSE_PERCTRL_DACREF_VDD, /** DAC uses bandgap reference. */ lesenseDACRefBandGap = LESENSE_PERCTRL_DACREF_BANDGAP } LESENSE_DACRef_TypeDef; /** ACMPx control configuration. */ typedef enum { /** LESENSE does not control the ACMPx. * Note: this value could be used for both ACMP0 and ACMP1. */ lesenseACMPModeDisable = _LESENSE_PERCTRL_ACMP0MODE_DISABLE, /** LESENSE controls the input mux of ACMPx. * Note: this value could be used for both ACMP0 and ACMP1. */ lesenseACMPModeMux = _LESENSE_PERCTRL_ACMP0MODE_MUX, /** LESENSE controls the input mux of and the threshold value of ACMPx. * Note: this value could be used for both ACMP0 and ACMP1. */ lesenseACMPModeMuxThres = _LESENSE_PERCTRL_ACMP0MODE_MUXTHRES } LESENSE_ControlACMP_TypeDef; /** Warm up modes. ACMP and DAC duty cycle mode configuration. */ typedef enum { /** ACMPs and DACs are shut down when LESENSE is idle. */ lesenseWarmupModeNormal = LESENSE_PERCTRL_WARMUPMODE_NORMAL, /** ACMPs are kept powered up when LESENSE is idle. */ lesenseWarmupModeACMP = LESENSE_PERCTRL_WARMUPMODE_KEEPACMPWARM, /** The DAC is kept powered up when LESENSE is idle. */ lesenseWarmupModeDAC = LESENSE_PERCTRL_WARMUPMODE_KEEPDACWARM, /** ACMPs and the DAC are kept powered up when LESENSE is idle. */ lesenseWarmupModeKeepWarm = LESENSE_PERCTRL_WARMUPMODE_KEEPACMPDACWARM } LESENSE_WarmupMode_TypeDef; /** Decoder input source configuration. */ typedef enum { /** The SENSORSTATE register is used as input to the decoder. */ lesenseDecInputSensorSt = LESENSE_DECCTRL_INPUT_SENSORSTATE, /** PRS channels are used as input to the decoder. */ lesenseDecInputPRS = LESENSE_DECCTRL_INPUT_PRS } LESENSE_DecInput_TypeDef; /** Compare source selection for sensor sampling. */ typedef enum { /** Counter output will be used in comparison. */ lesenseSampleModeCounter = LESENSE_CH_INTERACT_SAMPLE_COUNTER, /** ACMP output will be used in comparison. */ lesenseSampleModeACMP = LESENSE_CH_INTERACT_SAMPLE_ACMP } LESENSE_ChSampleMode_TypeDef; /** Interrupt generation setup for CHx interrupt flag. */ typedef enum { /** No interrupt is generated. */ lesenseSetIntNone = LESENSE_CH_INTERACT_SETIF_NONE, /** Set interrupt flag if the sensor triggers. */ lesenseSetIntLevel = LESENSE_CH_INTERACT_SETIF_LEVEL, /** Set interrupt flag on positive edge of the sensor state. */ lesenseSetIntPosEdge = LESENSE_CH_INTERACT_SETIF_POSEDGE, /** Set interrupt flag on negative edge of the sensor state. */ lesenseSetIntNegEdge = LESENSE_CH_INTERACT_SETIF_NEGEDGE } LESENSE_ChIntMode_TypeDef; /** Channel pin mode for the excitation phase of the scan sequence. */ typedef enum { /** Channel pin is disabled. */ lesenseChPinExDis = LESENSE_CH_INTERACT_EXMODE_DISABLE, /** Channel pin is configured as push-pull, driven HIGH. */ lesenseChPinExHigh = LESENSE_CH_INTERACT_EXMODE_HIGH, /** Channel pin is configured as push-pull, driven LOW. */ lesenseChPinExLow = LESENSE_CH_INTERACT_EXMODE_LOW, /** DAC output (only available on channel 0, 1, 2, 3, 12, 13, 14 and 15) */ lesenseChPinExDACOut = LESENSE_CH_INTERACT_EXMODE_DACOUT } LESENSE_ChPinExMode_TypeDef; /** Channel pin mode for the idle phase of the scan sequence. */ typedef enum { /** Channel pin is disabled in idle phase. * Note: this value could be used for all channels. */ lesenseChPinIdleDis = _LESENSE_IDLECONF_CH0_DISABLE, /** Channel pin is configured as push-pull, driven HIGH in idle phase. * Note: this value could be used for all channels. */ lesenseChPinIdleHigh = _LESENSE_IDLECONF_CH0_HIGH, /** Channel pin is configured as push-pull, driven LOW in idle phase. * Note: this value could be used for all channels. */ lesenseChPinIdleLow = _LESENSE_IDLECONF_CH0_LOW, /** Channel pin is connected to DAC CH0 output in idle phase. * Note: only applies to channel 0, 1, 2, 3. */ lesenseChPinIdleDACCh0 = _LESENSE_IDLECONF_CH0_DACCH0, /** Channel pin is connected to DAC CH1 output in idle phase. * Note: only applies to channel 12, 13, 14, 15. */ lesenseChPinIdleDACCh1 = _LESENSE_IDLECONF_CH12_DACCH1 } LESENSE_ChPinIdleMode_TypeDef; /** Clock used for excitation and sample delay timing. */ typedef enum { /** LFACLK (LF clock) is used. */ lesenseClkLF = _LESENSE_CH_INTERACT_EXCLK_LFACLK, /** AUXHFRCO (HF clock) is used. */ lesenseClkHF = _LESENSE_CH_INTERACT_EXCLK_AUXHFRCO } LESENSE_ChClk_TypeDef; /** Compare modes for counter comparison. */ typedef enum { /** Set interrupt flag if counter value is less than CTRTHRESHOLD, or if the * ACMP output is 0. */ lesenseCompModeLess = LESENSE_CH_EVAL_COMP_LESS, /** Set interrupt flag if counter value is greater than, or equal to * CTRTHRESHOLD, or if the ACMP output is 1. */ lesenseCompModeGreaterOrEq = LESENSE_CH_EVAL_COMP_GE } LESENSE_ChCompMode_TypeDef; /** Idle phase configuration of alternate excitation channels. */ typedef enum { /** ALTEX output is disabled in idle phase. * Note: this value could be used for all alternate excitation channels. */ lesenseAltExPinIdleDis = _LESENSE_ALTEXCONF_IDLECONF0_DISABLE, /** ALTEX output is high in idle phase. * Note: this value could be used for all alternate excitation channels. */ lesenseAltExPinIdleHigh = _LESENSE_ALTEXCONF_IDLECONF0_HIGH, /** ALTEX output is low in idle phase. * Note: this value could be used for all alternate excitation channels. */ lesenseAltExPinIdleLow = _LESENSE_ALTEXCONF_IDLECONF0_LOW } LESENSE_AltExPinIdle_TypeDef; /** Transition action modes. */ typedef enum { /** No PRS pulses generated (if PRSCOUNT == 0). * Do not count (if PRSCOUNT == 1). */ lesenseTransActNone = LESENSE_ST_TCONFA_PRSACT_NONE, /** Generate pulse on LESPRS0 (if PRSCOUNT == 0). */ lesenseTransActPRS0 = LESENSE_ST_TCONFA_PRSACT_PRS0, /** Generate pulse on LESPRS1 (if PRSCOUNT == 0). */ lesenseTransActPRS1 = LESENSE_ST_TCONFA_PRSACT_PRS1, /** Generate pulse on LESPRS0 and LESPRS1 (if PRSCOUNT == 0). */ lesenseTransActPRS01 = LESENSE_ST_TCONFA_PRSACT_PRS01, /** Generate pulse on LESPRS2 (for both PRSCOUNT == 0 and PRSCOUNT == 1). */ lesenseTransActPRS2 = LESENSE_ST_TCONFA_PRSACT_PRS2, /** Generate pulse on LESPRS0 and LESPRS2 (if PRSCOUNT == 0). */ lesenseTransActPRS02 = LESENSE_ST_TCONFA_PRSACT_PRS02, /** Generate pulse on LESPRS1 and LESPRS2 (if PRSCOUNT == 0). */ lesenseTransActPRS12 = LESENSE_ST_TCONFA_PRSACT_PRS12, /** Generate pulse on LESPRS0, LESPRS1 and LESPRS2 (if PRSCOUNT == 0). */ lesenseTransActPRS012 = LESENSE_ST_TCONFA_PRSACT_PRS012, /** Count up (if PRSCOUNT == 1). */ lesenseTransActUp = LESENSE_ST_TCONFA_PRSACT_UP, /** Count down (if PRSCOUNT == 1). */ lesenseTransActDown = LESENSE_ST_TCONFA_PRSACT_DOWN, /** Count up and generate pulse on LESPRS2 (if PRSCOUNT == 1). */ lesenseTransActUpAndPRS2 = LESENSE_ST_TCONFA_PRSACT_UPANDPRS2, /** Count down and generate pulse on LESPRS2 (if PRSCOUNT == 1). */ lesenseTransActDownAndPRS2 = LESENSE_ST_TCONFA_PRSACT_DOWNANDPRS2 } LESENSE_StTransAct_TypeDef; /******************************************************************************* ******************************* STRUCTS *********************************** ******************************************************************************/ /** Core control (LESENSE_CTRL) descriptor structure. */ typedef struct { /** Select scan start mode to control how the scan start is being triggered.*/ LESENSE_ScanMode_TypeDef scanStart; /** Select PRS source for scan start if scanMode is set to lesensePrsPulse. */ LESENSE_PRSSel_TypeDef prsSel; /** Select scan configuration register usage strategy. */ LESENSE_ScanConfSel_TypeDef scanConfSel; /** Set to true to invert ACMP0 output. */ bool invACMP0; /** Set to true to invert ACMP1 output. */ bool invACMP1; /** Set to true to sample both ACMPs simultaneously. */ bool dualSample; /** Set to true in order to to store SCANRES in RAM (accessible via RESDATA) * after each scan. */ bool storeScanRes; /** Set to true in order to always make LESENSE write to the result buffer, * even if it is full. */ bool bufOverWr; /** Select trigger conditions for interrupt and DMA. */ LESENSE_BufTrigLevel_TypeDef bufTrigLevel; /** Configure trigger condition for DMA wakeup from EM2. */ LESENSE_DMAWakeUp_TypeDef wakeupOnDMA; /** Select bias mode. */ LESENSE_BiasMode_TypeDef biasMode; /** Set to true to keep LESENSE running in debug mode. */ bool debugRun; } LESENSE_CoreCtrlDesc_TypeDef; /** Default configuration for LESENSE_CtrlDesc_TypeDef structure. */ #define LESENSE_CORECTRL_DESC_DEFAULT \ { \ lesenseScanStartPeriodic, /* Start new scan each time the period counter overflows. */ \ lesensePRSCh0, /* Default PRS channel is selected. */ \ lesenseScanConfDirMap, /* Direct mapping SCANCONF register usage strategy. */ \ false, /* Don't invert ACMP0 output. */ \ false, /* Don't invert ACMP1 output. */ \ false, /* Disable dual sampling. */ \ true, /* Store scan result after each scan. */ \ true, /* Overwrite result buffer register even if it is full. */ \ lesenseBufTrigHalf, /* Trigger interrupt and DMA request if result buffer is half full. */ \ lesenseDMAWakeUpDisable, /* Don't wake up on DMA from EM2. */ \ lesenseBiasModeDontTouch, /* Don't touch bias configuration. */ \ true /* Keep LESENSE running in debug mode. */ \ } /** LESENSE timing control descriptor structure. */ typedef struct { /** Set the number of LFACLK cycles to delay sensor interaction on * each channel. Valid range: 0-3 (2 bit). */ uint8_t startDelay; } LESENSE_TimeCtrlDesc_TypeDef; /** Default configuration for LESENSE_TimeCtrlDesc_TypeDef structure. */ #define LESENSE_TIMECTRL_DESC_DEFAULT 0U /** LESENSE peripheral control descriptor structure. */ typedef struct { /** Configure DAC channel 0 data control. */ LESENSE_ControlDACData_TypeDef dacCh0Data; /** Configure how LESENSE controls conversion on DAC channel 0. */ LESENSE_ControlDACConv_TypeDef dacCh0ConvMode; /** Configure how LESENSE controls output on DAC channel 0. */ LESENSE_ControlDACOut_TypeDef dacCh0OutMode; /** Configure DAC channel 1 data control. */ LESENSE_ControlDACData_TypeDef dacCh1Data; /** Configure how LESENSE controls conversion on DAC channel 1. */ LESENSE_ControlDACConv_TypeDef dacCh1ConvMode; /** Configure how LESENSE controls output on DAC channel 1. */ LESENSE_ControlDACOut_TypeDef dacCh1OutMode; /** Configure the prescaling factor for the LESENSE - DAC interface. * Valid range: 0-31 (5bit). */ uint8_t dacPresc; /** Configure the DAC reference to be used. Set to #lesenseDACRefVdd to use * VDD and set to #lesenseDACRefBandGap to use bandgap as reference. */ LESENSE_DACRef_TypeDef dacRef; /** Configure how LESENSE controls ACMP 0. */ LESENSE_ControlACMP_TypeDef acmp0Mode; /** Configure how LESENSE controls ACMP 1. */ LESENSE_ControlACMP_TypeDef acmp1Mode; /** Configure how LESENSE controls ACMPs and the DAC in idle mode. */ LESENSE_WarmupMode_TypeDef warmupMode; } LESENSE_PerCtrlDesc_TypeDef; /** Default configuration for LESENSE_PerCtrl_TypeDef structure. */ #define LESENSE_PERCTRL_DESC_DEFAULT \ { \ lesenseDACIfData, /**/ \ lesenseDACConvModeDisable, /**/ \ lesenseDACOutModeDisable, /**/ \ lesenseDACIfData, /**/ \ lesenseDACConvModeDisable, /**/ \ lesenseDACOutModeDisable, /**/ \ 0U, /**/ \ lesenseDACRefVdd, /**/ \ lesenseACMPModeMuxThres, /**/ \ lesenseACMPModeMuxThres, /**/ \ lesenseWarmupModeKeepWarm, /**/ \ } /** LESENSE decoder control descriptor structure. */ typedef struct { /** Select the input to the LESENSE decoder. */ LESENSE_DecInput_TypeDef decInput; /** Initial state of the LESENSE decoder. */ uint32_t initState; /** Set to enable the decoder to check the present state in addition * to the states defined in DECCONF. */ bool chkState; /** When set, a transition from state x in the decoder will set interrupt flag * CHx. */ bool intMap; /** Set to enable hysteresis in the decoder for suppressing changes on PRS * channel 0. */ bool hystPRS0; /** Set to enable hysteresis in the decoder for suppressing changes on PRS * channel 1. */ bool hystPRS1; /** Set to enable hysteresis in the decoder for suppressing changes on PRS * channel 2. */ bool hystPRS2; /** Set to enable hysteresis in the decoder for suppressing interrupt * requests. */ bool hystIRQ; /** Set to enable count mode on decoder PRS channels 0 and 1 to produce * outputs which can be used by a PCNT to count up or down. */ bool prsCount; /** Select PRS channel input for bit 0 of the LESENSE decoder. */ LESENSE_PRSSel_TypeDef prsChSel0; /** Select PRS channel input for bit 1 of the LESENSE decoder. */ LESENSE_PRSSel_TypeDef prsChSel1; /** Select PRS channel input for bit 2 of the LESENSE decoder. */ LESENSE_PRSSel_TypeDef prsChSel2; /** Select PRS channel input for bit 3 of the LESENSE decoder. */ LESENSE_PRSSel_TypeDef prsChSel3; } LESENSE_DecCtrlDesc_TypeDef; /** Default configuration for LESENSE_PerCtrl_TypeDef structure. */ #define LESENSE_DECCTRL_DESC_DEFAULT \ { \ lesenseDecInputSensorSt, /**/ \ 0U, /**/ \ false, /**/ \ true, /**/ \ true, /**/ \ true, /**/ \ true, /**/ \ true, /**/ \ false, /**/ \ lesensePRSCh0, /**/ \ lesensePRSCh1, /**/ \ lesensePRSCh2, /**/ \ lesensePRSCh3, /**/ \ } /** LESENSE module initialization structure. */ typedef struct { /** LESENSE core configuration parameters. */ LESENSE_CoreCtrlDesc_TypeDef coreCtrl; /** LESENSE timing configuration parameters. */ LESENSE_TimeCtrlDesc_TypeDef timeCtrl; /** LESENSE peripheral configuration parameters. */ LESENSE_PerCtrlDesc_TypeDef perCtrl; /** LESENSE decoder configuration parameters. */ LESENSE_DecCtrlDesc_TypeDef decCtrl; } LESENSE_Init_TypeDef; /** Default configuration for LESENSE_Init_TypeDef structure. */ #define LESENSE_INIT_DEFAULT \ { \ .coreCtrl = LESENSE_CORECTRL_DESC_DEFAULT, /* Default core control parameters. */ \ .timeCtrl = LESENSE_TIMECTRL_DESC_DEFAULT, /* Default time control parameters. */ \ .perCtrl = LESENSE_PERCTRL_DESC_DEFAULT, /* Default peripheral control parameters. */ \ .decCtrl = LESENSE_DECCTRL_DESC_DEFAULT /* Default decoder control parameters. */ \ } /** Channel descriptor structure. */ typedef struct { /** Set to enable scan channel CHx. */ bool enaScanCh; /** Set to enable CHx pin. */ bool enaPin; /** Enable/disable channel interrupts after configuring all the sensor channel * parameters. */ bool enaInt; /** Configure channel pin mode for the excitation phase of the scan sequence. * Note: OPAOUT is only available on channels 2, 3, 4, and 5. */ LESENSE_ChPinExMode_TypeDef chPinExMode; /** Configure channel pin idle setup in LESENSE idle phase. */ LESENSE_ChPinIdleMode_TypeDef chPinIdleMode; /** Set to use alternate excite pin for excitation. */ bool useAltEx; /** Set to enable the result from this channel being shifted into the decoder * register. */ bool shiftRes; /** Set to invert the result bit stored in SCANRES register. */ bool invRes; /** Set to store the counter value in RAM (accessible via RESDATA) and make * the comparison result available in the SCANRES register. */ bool storeCntRes; /** Select clock used for excitation timing. */ LESENSE_ChClk_TypeDef exClk; /** Select clock used for sample delay timing. */ LESENSE_ChClk_TypeDef sampleClk; /** Configure excitation time. Excitation will last exTime+1 excitation clock * cycles. Valid range: 0-63 (6 bits). */ uint8_t exTime; /** Configure sample delay. Sampling will occur after sampleDelay+1 sample * clock cycles. Valid range: 0-127 (7 bits). */ uint8_t sampleDelay; /** Configure measure delay. Sensor measuring is delayed for measDelay * excitation clock cycles. Valid range: 0-127 (7 bits). */ uint8_t measDelay; /** Configure ACMP threshold. * If perCtrl.dacCh0Data or perCtrl.dacCh1Data is set to #lesenseDACIfData, * acmpThres defines the 12-bit DAC data in the corresponding data register * of the DAC interface (DACn_CH0DATA and DACn_CH1DATA). * In this case, the valid range is: 0-4095 (12 bits). * If perCtrl.dacCh0Data or perCtrl.dacCh1Data is set to #lesenseACMPThres, * acmpThres defines the 6-bit Vdd scaling factor of ACMP negative input * (VDDLEVEL in ACMP_INPUTSEL register). * In this case, the valid range is: 0-63 (6 bits). */ uint16_t acmpThres; /** Select if ACMP output or counter output should be used in comparison. */ LESENSE_ChSampleMode_TypeDef sampleMode; /** Configure interrupt generation mode for CHx interrupt flag. */ LESENSE_ChIntMode_TypeDef intMode; /** Configure decision threshold for counter comparison. * Valid range: 0-65535 (16 bits). */ uint16_t cntThres; /** Select mode for counter comparison. */ LESENSE_ChCompMode_TypeDef compMode; } LESENSE_ChDesc_TypeDef; /** Configuration structure for all scan channels. */ typedef struct { /** Channel descriptor for all 16 channels. */ LESENSE_ChDesc_TypeDef Ch[16]; } LESENSE_ChAll_TypeDef; /** Default configuration for scan channel. */ #define LESENSE_CH_CONF_DEFAULT \ { \ true, /* Enable scan channel. */ \ true, /* Enable the assigned pin on scan channel. */ \ true, /* Enable interrupts on channel. */ \ lesenseChPinExHigh, /* Channel pin is high during the excitation period. */ \ lesenseChPinIdleLow, /* Channel pin is low during the idle period. */ \ false, /* Don't use alternate excitation pins for excitation. */ \ false, /* Disabled to shift results from this channel to the decoder register. */ \ false, /* Disabled to invert the scan result bit. */ \ false, /* Disabled to store counter value in the result buffer. */ \ lesenseClkLF, /* Use the LF clock for excitation timing. */ \ lesenseClkLF, /* Use the LF clock for sample timing. */ \ 0x03U, /* Excitation time is set to 3(+1) excitation clock cycles. */ \ 0x09U, /* Sample delay is set to 9(+1) sample clock cycles. */ \ 0x06U, /* Measure delay is set to 6 excitation clock cycles.*/ \ 0x00U, /* ACMP threshold has been set to 0. */ \ lesenseSampleModeACMP, /* ACMP output will be used in comparison. */ \ lesenseSetIntNone, /* No interrupt is generated by the channel. */ \ 0xFFU, /* Counter threshold has bee set to 0xFF. */ \ lesenseCompModeLess /* Compare mode has been set to trigger interrupt on "less". */ \ } /** Default configuration for all sensor channels. */ #define LESENSE_SCAN_CONF_DEFAULT \ { \ { \ LESENSE_CH_CONF_DEFAULT, /* Scan channel 0. */ \ LESENSE_CH_CONF_DEFAULT, /* Scan channel 1. */ \ LESENSE_CH_CONF_DEFAULT, /* Scan channel 2. */ \ LESENSE_CH_CONF_DEFAULT, /* Scan channel 3. */ \ LESENSE_CH_CONF_DEFAULT, /* Scan channel 4. */ \ LESENSE_CH_CONF_DEFAULT, /* Scan channel 5. */ \ LESENSE_CH_CONF_DEFAULT, /* Scan channel 6. */ \ LESENSE_CH_CONF_DEFAULT, /* Scan channel 7. */ \ LESENSE_CH_CONF_DEFAULT, /* Scan channel 8. */ \ LESENSE_CH_CONF_DEFAULT, /* Scan channel 9. */ \ LESENSE_CH_CONF_DEFAULT, /* Scan channel 10. */ \ LESENSE_CH_CONF_DEFAULT, /* Scan channel 11. */ \ LESENSE_CH_CONF_DEFAULT, /* Scan channel 12. */ \ LESENSE_CH_CONF_DEFAULT, /* Scan channel 13. */ \ LESENSE_CH_CONF_DEFAULT, /* Scan channel 14. */ \ LESENSE_CH_CONF_DEFAULT, /* Scan channel 15. */ \ } \ } /** Alternate excitation descriptor structure. */ typedef struct { /** Configure alternate excitation pins. If set, the corresponding alternate * excitation pin is enabled. */ bool enablePin; /** Configure idle phase setup of alternate excitation pins. */ LESENSE_AltExPinIdle_TypeDef idleConf; /** Configure how to control the external alternate excitation pins. Only * applies if altExMap has been set to lesenseAltExMapALTEX. * If true, the excitation happens on the corresponding alternate excitation * pin during the excitation periods of all enabled channels. * If false, the excitation happens on the corresponding alternate excitation * pin ONLY during the excitation period of the corresponding channel. */ bool alwaysEx; } LESENSE_AltExDesc_TypeDef; /** Configuration structure for alternate excitation. */ typedef struct { /** Select alternate excitation mapping. */ LESENSE_AltExMap_TypeDef altExMap; /** Alternate excitation channel descriptors. */ LESENSE_AltExDesc_TypeDef AltEx[8]; } LESENSE_ConfAltEx_TypeDef; /** Default configuration for alternate excitation channel. */ #define LESENSE_ALTEX_CH_CONF_DEFAULT \ { \ true, /* Alternate excitation enabled.*/ \ lesenseAltExIdleDis, /* Alternate excitation pin is disabled in idle. */ \ false /* Excite only for corresponding channel. */ \ } /** Default configuration for all alternate excitation channels. */ #define LESENSE_ALTEX_CONF_DEFAULT \ { \ lesenseAltExMapACMP, \ { \ LESENSE_ALTEX_CH_CONF_DEFAULT, /* Alternate excitation channel 0. */ \ LESENSE_ALTEX_CH_CONF_DEFAULT, /* Alternate excitation channel 1. */ \ LESENSE_ALTEX_CH_CONF_DEFAULT, /* Alternate excitation channel 2. */ \ LESENSE_ALTEX_CH_CONF_DEFAULT, /* Alternate excitation channel 3. */ \ LESENSE_ALTEX_CH_CONF_DEFAULT, /* Alternate excitation channel 4. */ \ LESENSE_ALTEX_CH_CONF_DEFAULT, /* Alternate excitation channel 5. */ \ LESENSE_ALTEX_CH_CONF_DEFAULT, /* Alternate excitation channel 6. */ \ LESENSE_ALTEX_CH_CONF_DEFAULT /* Alternate excitation channel 7. */ \ } \ } /** Decoder state condition descriptor structure. */ typedef struct { /** Configure compare value. State transition is triggered when sensor state * equals to this value. Valid range: 0-15 (4 bits). */ uint8_t compVal; /** Configure compare mask. Set bit X to exclude sensor X from evaluation. * Note: decoder can handle sensor inputs from up to 4 sensors, therefore * this mask is 4 bit long. */ uint8_t compMask; /** Configure index of state to be entered if the sensor state equals to * compVal. Valid range: 0-15 (4 bits). */ uint8_t nextState; /** Configure which PRS action to perform when sensor state equals to * compVal. */ LESENSE_StTransAct_TypeDef prsAct; /** If enabled, interrupt flag is set when sensor state equals to compVal. */ bool setInt; } LESENSE_DecStCond_TypeDef; /** Default configuration for decoder state condition. */ #define LESENSE_ST_CONF_DEFAULT \ { \ 0x0FU, /* Compare value set to 0x0F. */ \ 0x00U, /* All decoder inputs masked. */ \ 0U, /* Next state is state 0. */ \ lesenseTransActNone, /* No PRS action performed on compare match. */ \ false /* No interrupt triggered on compare match. */ \ } /** Decoder state x configuration structure. */ typedef struct { /** If enabled, the state descriptor pair in the next location will also be * evaluated. */ bool chainDesc; /** State condition descriptor A (high level descriptor of * LESENSE_STx_DECCONFA). */ LESENSE_DecStCond_TypeDef confA; /** State condition descriptor B (high level descriptor of * LESENSE_STx_DECCONFB). */ LESENSE_DecStCond_TypeDef confB; } LESENSE_DecStDesc_TypeDef; /** Configuration structure for the decoder. */ typedef struct { /** Descriptor of the 16 decoder states. */ LESENSE_DecStDesc_TypeDef St[16]; } LESENSE_DecStAll_TypeDef; /** Default configuration for all decoder states. */ #define LESENSE_DECODER_CONF_DEFAULT \ { /* chain | Descriptor A | Descriptor B */ \ { \ { false, LESENSE_ST_CONF_DEFAULT, LESENSE_ST_CONF_DEFAULT }, /* Decoder state 0. */ \ { false, LESENSE_ST_CONF_DEFAULT, LESENSE_ST_CONF_DEFAULT }, /* Decoder state 1. */ \ { false, LESENSE_ST_CONF_DEFAULT, LESENSE_ST_CONF_DEFAULT }, /* Decoder state 2. */ \ { false, LESENSE_ST_CONF_DEFAULT, LESENSE_ST_CONF_DEFAULT }, /* Decoder state 3. */ \ { false, LESENSE_ST_CONF_DEFAULT, LESENSE_ST_CONF_DEFAULT }, /* Decoder state 4. */ \ { false, LESENSE_ST_CONF_DEFAULT, LESENSE_ST_CONF_DEFAULT }, /* Decoder state 5. */ \ { false, LESENSE_ST_CONF_DEFAULT, LESENSE_ST_CONF_DEFAULT }, /* Decoder state 6. */ \ { false, LESENSE_ST_CONF_DEFAULT, LESENSE_ST_CONF_DEFAULT }, /* Decoder state 7. */ \ { false, LESENSE_ST_CONF_DEFAULT, LESENSE_ST_CONF_DEFAULT }, /* Decoder state 8. */ \ { false, LESENSE_ST_CONF_DEFAULT, LESENSE_ST_CONF_DEFAULT }, /* Decoder state 9. */ \ { false, LESENSE_ST_CONF_DEFAULT, LESENSE_ST_CONF_DEFAULT }, /* Decoder state 10. */ \ { false, LESENSE_ST_CONF_DEFAULT, LESENSE_ST_CONF_DEFAULT }, /* Decoder state 11. */ \ { false, LESENSE_ST_CONF_DEFAULT, LESENSE_ST_CONF_DEFAULT }, /* Decoder state 12. */ \ { false, LESENSE_ST_CONF_DEFAULT, LESENSE_ST_CONF_DEFAULT }, /* Decoder state 13. */ \ { false, LESENSE_ST_CONF_DEFAULT, LESENSE_ST_CONF_DEFAULT }, /* Decoder state 14. */ \ { false, LESENSE_ST_CONF_DEFAULT, LESENSE_ST_CONF_DEFAULT } /* Decoder state 15. */ \ } \ } /******************************************************************************* ***************************** PROTOTYPES ********************************** ******************************************************************************/ void LESENSE_Init(LESENSE_Init_TypeDef const *init, bool const reqReset); void LESENSE_Reset(void); uint32_t LESENSE_ScanFreqSet(uint32_t refFreq, uint32_t const scanFreq); void LESENSE_ScanModeSet(LESENSE_ScanMode_TypeDef const scanMode, bool const start); void LESENSE_StartDelaySet(uint8_t const startDelay); void LESENSE_ClkDivSet(LESENSE_ChClk_TypeDef const clk, LESENSE_ClkPresc_TypeDef const clkDiv); void LESENSE_ChannelAllConfig(LESENSE_ChAll_TypeDef const *confChAll); void LESENSE_ChannelConfig(LESENSE_ChDesc_TypeDef const *confCh, uint32_t const chIdx); void LESENSE_ChannelEnable(uint8_t const chIdx, bool const enaScanCh, bool const enaPin); void LESENSE_ChannelEnableMask(uint16_t chMask, uint16_t pinMask); void LESENSE_ChannelTimingSet(uint8_t const chIdx, uint8_t const exTime, uint8_t const sampleDelay, uint8_t const measDelay); void LESENSE_ChannelThresSet(uint8_t const chIdx, uint16_t const acmpThres, uint16_t const cntThres); void LESENSE_AltExConfig(LESENSE_ConfAltEx_TypeDef const *confAltEx); void LESENSE_DecoderStateAllConfig(LESENSE_DecStAll_TypeDef const *confDecStAll); void LESENSE_DecoderStateConfig(LESENSE_DecStDesc_TypeDef const *confDecSt, uint32_t const decSt); void LESENSE_DecoderStateSet(uint32_t decSt); uint32_t LESENSE_DecoderStateGet(void); static __INLINE void LESENSE_ScanStart(void); static __INLINE void LESENSE_ScanStop(void); static __INLINE void LESENSE_DecoderStart(void); static __INLINE void LESENSE_DecoderStop(void); static __INLINE void LESENSE_ResultBufferClear(void); static __INLINE uint32_t LESENSE_StatusGet(void); static __INLINE void LESENSE_StatusWait(uint32_t flag); static __INLINE uint32_t LESENSE_ChannelActiveGet(void); static __INLINE uint32_t LESENSE_ScanResultGet(void); static __INLINE uint32_t LESENSE_ScanResultDataGet(void); static __INLINE uint32_t LESENSE_ScanResultDataBufferGet(uint32_t idx); static __INLINE uint32_t LESENSE_SensorStateGet(void); static __INLINE void LESENSE_RAMPowerDown(void); static __INLINE void LESENSE_IntClear(uint32_t flags); static __INLINE void LESENSE_IntEnable(uint32_t flags); static __INLINE void LESENSE_IntDisable(uint32_t flags); static __INLINE void LESENSE_IntSet(uint32_t flags); static __INLINE uint32_t LESENSE_IntGet(void); static __INLINE uint32_t LESENSE_IntGetEnabled(void); /***************************************************************************//** * @brief * Start scanning of sensors. ******************************************************************************/ static __INLINE void LESENSE_ScanStart(void) { /* Start scanning of sensors */ LESENSE->CMD = LESENSE_CMD_START; } /***************************************************************************//** * @brief * Stop scanning of sensors. * * @note * If issued during a scan, the command takes effect after scan completion. ******************************************************************************/ static __INLINE void LESENSE_ScanStop(void) { /* Stop scanning of sensors */ LESENSE->CMD = LESENSE_CMD_STOP; } /***************************************************************************//** * @brief * Start LESENSE decoder. ******************************************************************************/ static __INLINE void LESENSE_DecoderStart(void) { /* Start decoder */ LESENSE->CMD = LESENSE_CMD_DECODE; } /***************************************************************************//** * @brief * Stop LESENSE decoder. * * @details * This function disables the LESENSE decoder by setting the command to the * LESENSE_DECCTRL register. ******************************************************************************/ static __INLINE void LESENSE_DecoderStop(void) { /* Stop the decoder */ LESENSE->DECCTRL |= LESENSE_DECCTRL_DISABLE; } /***************************************************************************//** * @brief * Clear result buffer. ******************************************************************************/ static __INLINE void LESENSE_ResultBufferClear(void) { LESENSE->CMD = LESENSE_CMD_CLEARBUF; } /***************************************************************************//** * @brief * Get the current status of LESENSE. * * @return * This function returns the value of LESENSE_STATUS register that * contains the OR combination of the following status bits: * @li LESENSE_STATUS_RESV - Result data valid. Set when data is available * in the result buffer. Cleared when the buffer is empty. * @li LESENSE_STATUS_RESFULL - Result buffer full. Set when the result * buffer is full. * @li LESENSE_STATUS_RUNNING - LESENSE is active. * @li LESENSE_STATUS_SCANACTIVE - LESENSE is currently interfacing sensors. ******************************************************************************/ static __INLINE uint32_t LESENSE_StatusGet(void) { return LESENSE->STATUS; } /***************************************************************************//** * @brief * Wait until the status of LESENSE is equal to what requested. * * @details * This function is polling the LESENSE_STATUS register and waits until the * requested combination of flags are set. * * @param[in] flag * The OR combination of the following status bits: * @li LESENSE_STATUS_BUFDATAV - Result data valid. Set when data is available * in the result buffer. Cleared when the buffer is empty. * @li LESENSE_STATUS_BUFHALFFULL - Result buffer half full. Set when the * result buffer is half full. * @li LESENSE_STATUS_BUFFULL - Result buffer full. Set when the result * buffer is full. * @li LESENSE_STATUS_RUNNING - LESENSE is active. * @li LESENSE_STATUS_SCANACTIVE - LESENSE is currently interfacing sensors. * @li LESENSE_STATUS_DACACTIVE - The DAC interface is currently active. ******************************************************************************/ static __INLINE void LESENSE_StatusWait(uint32_t flag) { while (!(LESENSE->STATUS & flag)) ; } /***************************************************************************//** * @brief * Get the currently active channel index. * * @return * This function returns the value of LESENSE_CHINDEX register that * contains the index of the currently active channel (0-15). ******************************************************************************/ static __INLINE uint32_t LESENSE_ChannelActiveGet(void) { return LESENSE->CURCH; } /***************************************************************************//** * @brief * Get the latest scan comparison result (1 bit / channel). * * @return * This function returns the value of LESENSE_SCANRES register that * contains the comparison result of the last scan on all channels. * Bit x is set if a comparison triggered on channel x, which means that the * LESENSE counter met the comparison criteria set in LESENSE_CHx_EVAL by * COMPMODE and CNTTHRES. ******************************************************************************/ static __INLINE uint32_t LESENSE_ScanResultGet(void) { return LESENSE->SCANRES; } /***************************************************************************//** * @brief * Get the oldest unread data from the result buffer. * * @note * Make sure that the STORERES bit is set in LESENSE_CHx_EVAL, or * STRSCANRES bit is set in LESENSE_CTRL, otherwise this function will return * undefined value. * * @return * This function returns the value of LESENSE_RESDATA register that * contains the oldest unread counter result from the result buffer. ******************************************************************************/ static __INLINE uint32_t LESENSE_ScanResultDataGet(void) { return LESENSE->BUFDATA; } /***************************************************************************//** * @brief * Get data from the result data buffer. * * @note * Make sure that the STORERES bit is set in LESENSE_CHx_EVAL, or * STRSCANRES bit is set in LESENSE_CTRL, otherwise this function will return * undefined value. * * @param[in] * Result data buffer index. Valid range: 0-15. * * @return * This function returns the selected word from the result data buffer. ******************************************************************************/ static __INLINE uint32_t LESENSE_ScanResultDataBufferGet(uint32_t idx) { /* Note: masking is needed to avoid over-indexing! */ return LESENSE->BUF[idx & 0x0FU].DATA; } /***************************************************************************//** * @brief * Get the current state of the LESENSE sensor. * * @return * This function returns the value of LESENSE_SENSORSTATE register that * represents the current state of the LESENSE sensor. ******************************************************************************/ static __INLINE uint32_t LESENSE_SensorStateGet(void) { return LESENSE->SENSORSTATE; } /***************************************************************************//** * @brief * Shut off power to the LESENSE RAM, disables LESENSE. * * @details * This function shuts off the LESENSE RAM in order to decrease the leakage * current of EFM32 if LESENSE is not used in your application. * * @note * Warning! Once the LESENSE RAM is powered down, it cannot be powered up * again. ******************************************************************************/ static __INLINE void LESENSE_RAMPowerDown(void) { /* Power down LESENSE RAM */ LESENSE->POWERDOWN = LESENSE_POWERDOWN_RAM; } /***************************************************************************//** * @brief * Clear one or more pending LESENSE interrupts. * * @param[in] flags * Pending LESENSE interrupt sources to clear. Use a set of interrupt flags * OR-ed together to clear multiple interrupt sources of the LESENSE module * (LESENSE_IF_nnn). ******************************************************************************/ static __INLINE void LESENSE_IntClear(uint32_t flags) { LESENSE->IFC = flags; } /***************************************************************************//** * @brief * Enable one or more LESENSE interrupts. * * @param[in] flags * LESENSE interrupt sources to enable. Use a set of interrupt flags OR-ed * together to enable multiple interrupt sources of the LESENSE module * (LESENSE_IF_nnn). ******************************************************************************/ static __INLINE void LESENSE_IntEnable(uint32_t flags) { LESENSE->IEN |= flags; } /***************************************************************************//** * @brief * Disable one or more LESENSE interrupts. * * @param[in] flags * LESENSE interrupt sources to disable. Use a set of interrupt flags OR-ed * together to disable multiple interrupt sources of the LESENSE module * (LESENSE_IF_nnn). ******************************************************************************/ static __INLINE void LESENSE_IntDisable(uint32_t flags) { LESENSE->IEN &= ~(flags); } /***************************************************************************//** * @brief * Set one or more pending LESENSE interrupts from SW. * * @param[in] flags * LESENSE interrupt sources to set to pending. Use a set of interrupt * flags OR-ed together to set multiple interrupt sources of the LESENSE * module (LESENSE_IFS_nnn). ******************************************************************************/ static __INLINE void LESENSE_IntSet(uint32_t flags) { LESENSE->IFS = flags; } /***************************************************************************//** * @brief * Get pending LESENSE interrupt flags. * * @note * The event bits are not cleared by the use of this function. * * @return * Pending LESENSE interrupt sources. The OR combination of valid interrupt * flags of the LESENSE module (LESENSE_IF_nnn). ******************************************************************************/ static __INLINE uint32_t LESENSE_IntGet(void) { return LESENSE->IF; } /***************************************************************************//** * @brief * Get enabled and pending LESENSE interrupt flags. * * @details * Useful for handling more interrupt sources in the same interrupt handler. * * @note * The event bits are not cleared by the use of this function. * * @return * Pending and enabled LESENSE interrupt sources. * The return value is the bitwise AND combination of * - the OR combination of enabled interrupt sources in LESENSE_IEN_nnn * register (LESENSE_IEN_nnn) and * - the OR combination of valid interrupt flags of the LESENSE module * (LESENSE_IF_nnn). ******************************************************************************/ static __INLINE uint32_t LESENSE_IntGetEnabled(void) { uint32_t tmp = 0U; /* Store LESENSE->IEN in temporary variable in order to define explicit order * of volatile accesses. */ tmp = LESENSE->IEN; /* Bitwise AND of pending and enabled interrupts */ return LESENSE->IF & tmp; } /** @} (end addtogroup LESENSE) */ /** @} (end addtogroup EFM32_Library) */ #ifdef __cplusplus } #endif #endif /* defined(LESENSE_COUNT) && (LESENSE_COUNT > 0) */ #endif /* __EFM32_LESENSE_H */