PRS - Peripheral Reflex System#

Peripheral Reflex System (PRS) Peripheral API.

This module contains functions to control the PRS peripheral of Silicon Labs 32-bit MCUs and SoCs. The PRS allows configurable, fast, and autonomous communication between peripherals on the MCU or SoC.

Enumerations#

enum

PRS_ChType_t {

prsTypeAsync

prsTypeSync

}

PRS Channel type.

enum

PRS_Edge_TypeDef {

prsEdgeOff

prsEdgePos

prsEdgeNeg

prsEdgeBoth

}

Edge detection type.

enum

PRS_Logic_t {

prsLogic_Zero = _PRS_ASYNC_CH_CTRL_FNSEL_LOGICAL_ZERO

prsLogic_A_NOR_B = _PRS_ASYNC_CH_CTRL_FNSEL_A_NOR_B

prsLogic_NOT_A_AND_B = _PRS_ASYNC_CH_CTRL_FNSEL_NOT_A_AND_B

prsLogic_NOT_A = _PRS_ASYNC_CH_CTRL_FNSEL_NOT_A

prsLogic_A_AND_NOT_B = _PRS_ASYNC_CH_CTRL_FNSEL_A_AND_NOT_B

prsLogic_NOT_B = _PRS_ASYNC_CH_CTRL_FNSEL_NOT_B

prsLogic_A_XOR_B = _PRS_ASYNC_CH_CTRL_FNSEL_A_XOR_B

prsLogic_A_NAND_B = _PRS_ASYNC_CH_CTRL_FNSEL_A_NAND_B

prsLogic_A_AND_B = _PRS_ASYNC_CH_CTRL_FNSEL_A_AND_B

prsLogic_A_XNOR_B = _PRS_ASYNC_CH_CTRL_FNSEL_A_XNOR_B

prsLogic_B = _PRS_ASYNC_CH_CTRL_FNSEL_B

prsLogic_NOT_A_OR_B = _PRS_ASYNC_CH_CTRL_FNSEL_NOT_A_OR_B

prsLogic_A = _PRS_ASYNC_CH_CTRL_FNSEL_A

prsLogic_A_OR_NOT_B = _PRS_ASYNC_CH_CTRL_FNSEL_A_OR_NOT_B

prsLogic_A_OR_B = _PRS_ASYNC_CH_CTRL_FNSEL_A_OR_B

prsLogic_One = _PRS_ASYNC_CH_CTRL_FNSEL_LOGICAL_ONE

}

Logic functions that can be used when combining two PRS channels.

enum

PRS_Signal_t {

prsSignalNone = PRS_SYNC_CH_CTRL_SOURCESEL_DEFAULT | (0x0 << _PRS_SYNC_CH_CTRL_SIGSEL_SHIFT)

prsSignalSW = PRS_SYNC_CH_CTRL_SOURCESEL_DEFAULT | (0x1 << _PRS_SYNC_CH_CTRL_SIGSEL_SHIFT)

prsSignalTIMER0_UF = PRS_TIMER0_UF

prsSignalTIMER0_OF = PRS_TIMER0_OF

prsSignalTIMER0_CC0 = PRS_TIMER0_CC0

prsSignalTIMER0_CC1 = PRS_TIMER0_CC1

prsSignalTIMER0_CC2 = PRS_TIMER0_CC2

prsSignalTIMER1_UF = PRS_TIMER1_UF

prsSignalTIMER1_OF = PRS_TIMER1_OF

prsSignalTIMER1_CC0 = PRS_TIMER1_CC0

prsSignalTIMER1_CC1 = PRS_TIMER1_CC1

prsSignalTIMER1_CC2 = PRS_TIMER1_CC2

prsSignalTIMER2_UF = PRS_TIMER2_UF

prsSignalTIMER2_OF = PRS_TIMER2_OF

prsSignalTIMER2_CC0 = PRS_TIMER2_CC0

prsSignalTIMER2_CC1 = PRS_TIMER2_CC1

prsSignalTIMER2_CC2 = PRS_TIMER2_CC2

prsSignalTIMER3_UF = PRS_TIMER3_UF

prsSignalTIMER3_OF = PRS_TIMER3_OF

prsSignalTIMER3_CC0 = PRS_TIMER3_CC0

prsSignalTIMER3_CC1 = PRS_TIMER3_CC1

prsSignalTIMER3_CC2 = PRS_TIMER3_CC2

prsSignalTIMER4_UF = PRS_TIMER4_UF

prsSignalTIMER4_OF = PRS_TIMER4_OF

prsSignalTIMER4_CC0 = PRS_TIMER4_CC0

prsSignalTIMER4_CC1 = PRS_TIMER4_CC1

prsSignalTIMER4_CC2 = PRS_TIMER4_CC2

prsSignalLETIMER0_CH0 = PRS_LETIMER0_CH0

prsSignalLETIMER0_CH1 = PRS_LETIMER0_CH1

prsSignalCORE_CTIOUT0 = PRS_CORE_CTIOUT0

prsSignalCORE_CTIOUT1 = PRS_CORE_CTIOUT1

prsSignalCORE_CTIOUT2 = PRS_CORE_CTIOUT2

prsSignalCORE_CTIOUT3 = PRS_CORE_CTIOUT3

prsSignalCMUL_CLKOUT0 = PRS_CMUL_CLKOUT0

prsSignalCMUL_CLKOUT1 = PRS_CMUL_CLKOUT1

prsSignalCMUL_CLKOUT2 = PRS_CMUL_CLKOUT2

prsSignalPRSL_ASYNCH0 = PRS_PRSL_ASYNCH0

prsSignalPRSL_ASYNCH1 = PRS_PRSL_ASYNCH1

prsSignalPRSL_ASYNCH2 = PRS_PRSL_ASYNCH2

prsSignalPRSL_ASYNCH3 = PRS_PRSL_ASYNCH3

prsSignalPRSL_ASYNCH4 = PRS_PRSL_ASYNCH4

prsSignalPRSL_ASYNCH5 = PRS_PRSL_ASYNCH5

prsSignalPRSL_ASYNCH6 = PRS_PRSL_ASYNCH6

prsSignalPRSL_ASYNCH7 = PRS_PRSL_ASYNCH7

prsSignalPRS_ASYNCH8 = PRS_PRS_ASYNCH8

prsSignalPRS_ASYNCH9 = PRS_PRS_ASYNCH9

prsSignalPRS_ASYNCH10 = PRS_PRS_ASYNCH10

prsSignalPRS_ASYNCH11 = PRS_PRS_ASYNCH11

prsSignalRTCC_CCV0 = PRS_RTCC_CCV0

prsSignalRTCC_CCV1 = PRS_RTCC_CCV1

prsSignalRTCC_CCV2 = PRS_RTCC_CCV2

prsSignalBURTC_COMP = PRS_BURTC_COMP

prsSignalBURTC_OF = PRS_BURTC_OF

prsSignalUSART0_TXC = PRS_USART0_TXC

prsSignalUSART0_RXDATA = PRS_USART0_RXDATA

prsSignalUSART0_IRTX = PRS_USART0_IRTX

prsSignalUSART0_RTS = PRS_USART0_RTS

prsSignalUSART0_TX = PRS_USART0_TX

prsSignalUSART0_CS = PRS_USART0_CS

prsSignalUSART1_TXC = PRS_USART1_TXC

prsSignalUSART1_RXDATA = PRS_USART1_RXDATA

prsSignalUSART1_IRTX = PRS_USART1_IRTX

prsSignalUSART1_RTS = PRS_USART1_RTS

prsSignalUSART1_TX = PRS_USART1_TX

prsSignalUSART1_CS = PRS_USART1_CS

prsSignalIADC0_SCANENTRY = PRS_IADC0_SCANENTRYDONE

prsSignalIADC0_SCANTABLE = PRS_IADC0_SCANTABLEDONE

prsSignalIADC0_SINGLE = PRS_IADC0_SINGLEDONE

prsSignalGPIO_PIN0 = PRS_GPIO_PIN0

prsSignalGPIO_PIN1 = PRS_GPIO_PIN1

prsSignalGPIO_PIN2 = PRS_GPIO_PIN2

prsSignalGPIO_PIN3 = PRS_GPIO_PIN3

prsSignalGPIO_PIN4 = PRS_GPIO_PIN4

prsSignalGPIO_PIN5 = PRS_GPIO_PIN5

prsSignalGPIO_PIN6 = PRS_GPIO_PIN6

prsSignalGPIO_PIN7 = PRS_GPIO_PIN7

prsSignalLFRCO_CALMEAS = PRS_LFRCO_CALMEAS

prsSignalLFRCO_SDM = PRS_LFRCO_SDM

prsSignalLFRCO_TCMEAS = PRS_LFRCO_TCMEAS

}

PRS Signal.

enum

PRS_Consumer_t {

prsConsumerNone = 0x000

prsConsumerCMU_CALDN = offsetof(PRS_TypeDef, CONSUMER_CMU_CALDN)

prsConsumerCMU_CALUP = offsetof(PRS_TypeDef, CONSUMER_CMU_CALUP)

prsConsumerIADC0_SCANTRIGGER = offsetof(PRS_TypeDef, CONSUMER_IADC0_SCANTRIGGER)

prsConsumerIADC0_SINGLETRIGGER = offsetof(PRS_TypeDef, CONSUMER_IADC0_SINGLETRIGGER)

prsConsumerLDMA_REQUEST0 = offsetof(PRS_TypeDef, CONSUMER_LDMAXBAR_DMAREQ0)

prsConsumerLDMA_REQUEST1 = offsetof(PRS_TypeDef, CONSUMER_LDMAXBAR_DMAREQ1)

prsConsumerLETIMER0_CLEAR = offsetof(PRS_TypeDef, CONSUMER_LETIMER0_CLEAR)

prsConsumerLETIMER0_START = offsetof(PRS_TypeDef, CONSUMER_LETIMER0_START)

prsConsumerLETIMER0_STOP = offsetof(PRS_TypeDef, CONSUMER_LETIMER0_STOP)

prsConsumerTIMER0_CC0 = offsetof(PRS_TypeDef, CONSUMER_TIMER0_CC0)

prsConsumerTIMER0_CC1 = offsetof(PRS_TypeDef, CONSUMER_TIMER0_CC1)

prsConsumerTIMER0_CC2 = offsetof(PRS_TypeDef, CONSUMER_TIMER0_CC2)

prsConsumerTIMER1_CC0 = offsetof(PRS_TypeDef, CONSUMER_TIMER1_CC0)

prsConsumerTIMER1_CC1 = offsetof(PRS_TypeDef, CONSUMER_TIMER1_CC1)

prsConsumerTIMER1_CC2 = offsetof(PRS_TypeDef, CONSUMER_TIMER1_CC2)

prsConsumerTIMER2_CC0 = offsetof(PRS_TypeDef, CONSUMER_TIMER2_CC0)

prsConsumerTIMER2_CC1 = offsetof(PRS_TypeDef, CONSUMER_TIMER2_CC1)

prsConsumerTIMER2_CC2 = offsetof(PRS_TypeDef, CONSUMER_TIMER2_CC2)

prsConsumerTIMER3_CC0 = offsetof(PRS_TypeDef, CONSUMER_TIMER3_CC0)

prsConsumerTIMER3_CC1 = offsetof(PRS_TypeDef, CONSUMER_TIMER3_CC1)

prsConsumerTIMER3_CC2 = offsetof(PRS_TypeDef, CONSUMER_TIMER3_CC2)

prsConsumerTIMER4_CC0 = offsetof(PRS_TypeDef, CONSUMER_TIMER4_CC0)

prsConsumerTIMER4_CC1 = offsetof(PRS_TypeDef, CONSUMER_TIMER4_CC1)

prsConsumerTIMER4_CC2 = offsetof(PRS_TypeDef, CONSUMER_TIMER4_CC2)

prsConsumerUSART0_CLK = offsetof(PRS_TypeDef, CONSUMER_USART0_CLK)

prsConsumerUSART0_IR = offsetof(PRS_TypeDef, CONSUMER_USART0_IR)

prsConsumerUSART0_RX = offsetof(PRS_TypeDef, CONSUMER_USART0_RX)

prsConsumerUSART0_TRIGGER = offsetof(PRS_TypeDef, CONSUMER_USART0_TRIGGER)

prsConsumerUSART1_CLK = offsetof(PRS_TypeDef, CONSUMER_USART1_CLK)

prsConsumerUSART1_IR = offsetof(PRS_TypeDef, CONSUMER_USART1_IR)

prsConsumerUSART1_RX = offsetof(PRS_TypeDef, CONSUMER_USART1_RX)

prsConsumerUSART1_TRIGGER = offsetof(PRS_TypeDef, CONSUMER_USART1_TRIGGER)

prsConsumerEUART0_RX = offsetof(PRS_TypeDef, CONSUMER_EUART0_RX)

prsConsumerEUART0_TRIGGER = offsetof(PRS_TypeDef, CONSUMER_EUART0_TRIGGER)

prsConsumerWDOG0_SRC0 = offsetof(PRS_TypeDef, CONSUMER_WDOG0_SRC0)

prsConsumerWDOG0_SRC1 = offsetof(PRS_TypeDef, CONSUMER_WDOG0_SRC1)

prsConsumerRTCC_CC0 = offsetof(PRS_TypeDef, CONSUMER_RTCC_CC0)

prsConsumerRTCC_CC1 = offsetof(PRS_TypeDef, CONSUMER_RTCC_CC1)

prsConsumerRTCC_CC2 = offsetof(PRS_TypeDef, CONSUMER_RTCC_CC2)

}

PRS Consumers.

Functions#

void

PRS_LevelSet(uint32_t level, uint32_t mask)

Set level control bit for one or more channels.

uint32_t

PRS_LevelGet(void)

Get level control bit for all channels.

uint32_t

PRS_Values(PRS_ChType_t type)

Get the PRS channel values for all channels.

bool

PRS_ChannelValue(unsigned int ch, PRS_ChType_t type)

Get the PRS channel value for a single channel.

void

PRS_PulseTrigger(uint32_t channels)

Trigger a high pulse (one HFPERCLK) for one or more channels.

void

PRS_ChannelLevelSet(unsigned int ch, bool level)

Set the PRS channel level for one asynchronous PRS channel.

void

PRS_ChannelPulse(unsigned int ch)

Trigger a pulse on one PRS channel.

void

PRS_SourceSignalSet(unsigned int ch, uint32_t source, uint32_t signal, PRS_Edge_TypeDef edge)

Set a source and signal for a channel.

void

PRS_SourceAsyncSignalSet(unsigned int ch, uint32_t source, uint32_t signal)

Set the source and asynchronous signal for a channel.

int

PRS_GetFreeChannel(PRS_ChType_t type)

Search for the first free PRS channel.

void

PRS_Reset(void)

Reset all PRS channels.

void

PRS_ConnectSignal(unsigned int ch, PRS_ChType_t type, PRS_Signal_t signal)

Connect a PRS signal to a channel.

uint32_t

PRS_ConvertToSyncSource(uint32_t asyncSource)

Convert an async PRS source to a sync source.

uint32_t

PRS_ConvertToSyncSignal(uint32_t asyncSource, uint32_t asyncSignal)

Convert an async PRS signal to a sync signal.

void

PRS_ConnectConsumer(unsigned int ch, PRS_ChType_t type, PRS_Consumer_t consumer)

Connect a peripheral consumer to a PRS channel.

void

PRS_PinOutput(unsigned int ch, PRS_ChType_t type, GPIO_Port_TypeDef port, uint8_t pin)

Send the output of a PRS channel to a GPIO pin.

void

PRS_Combine(unsigned int chA, unsigned int chB, PRS_Logic_t logic)

Combine two PRS channels using a logic function.

Macros#

#define

PRS_SYNC_CHAN_COUNT PRS_SYNC_CH_NUM

PRS Synchronous channel count.

#define

PRS_ASYNC_CHAN_COUNT PRS_ASYNC_CH_NUM

PRS Asynchronous channel count.

#define

PRS_ASYNC_SUPPORTED 1

PRS asynchronous support.

Enumeration Documentation#

PRS_ChType_t#

PRS_ChType_t

PRS Channel type.

Enumerator
prsTypeAsync	Asynchronous channel type.
prsTypeSync	Synchronous channel type.

Definition at line 102 of file platform/emlib/inc/em_prs.h

PRS_Edge_TypeDef#

PRS_Edge_TypeDef

Edge detection type.

Enumerator
prsEdgeOff	Leave signal as is.
prsEdgePos	Generate pulses on positive edge.
prsEdgeNeg	Generate pulses on negative edge.
prsEdgeBoth	Generate pulses on both edges.

Definition at line 108 of file platform/emlib/inc/em_prs.h

PRS_Logic_t#

PRS_Logic_t

Logic functions that can be used when combining two PRS channels.

Enumerator
prsLogic_Zero	Logical 0.
prsLogic_A_NOR_B	A NOR B.
prsLogic_NOT_A_AND_B	(!A) NOR B.
prsLogic_NOT_A	!A.
prsLogic_A_AND_NOT_B	A AND (!B).
prsLogic_NOT_B	!B.
prsLogic_A_XOR_B	A XOR B.
prsLogic_A_NAND_B	A NAND B.
prsLogic_A_AND_B	A AND B.
prsLogic_A_XNOR_B	A XNOR B.
prsLogic_B	B.
prsLogic_NOT_A_OR_B	(!A) OR B.
prsLogic_A	A.
prsLogic_A_OR_NOT_B	A OR (!B).
prsLogic_A_OR_B	A OR B.
prsLogic_One	Logical 1.

Definition at line 117 of file platform/emlib/inc/em_prs.h

PRS_Signal_t#

PRS_Signal_t

PRS Signal.

Enumerator
prsSignalNone	No Signal.
prsSignalSW	Software-reserved Signal.
prsSignalTIMER0_UF	TIMER0 underflow Signal.
prsSignalTIMER0_OF	TIMER0 overflow Signal.
prsSignalTIMER0_CC0	TIMER0 capture/compare channel 0 Signal.
prsSignalTIMER0_CC1	TIMER0 capture/compare channel 1 Signal.
prsSignalTIMER0_CC2	TIMER0 capture/compare channel 2 Signal.
prsSignalTIMER1_UF	TIMER1 underflow Signal.
prsSignalTIMER1_OF	TIMER1 overflow Signal.
prsSignalTIMER1_CC0	TIMER1 capture/compare channel 0 Signal.
prsSignalTIMER1_CC1	TIMER1 capture/compare channel 1 Signal.
prsSignalTIMER1_CC2	TIMER1 capture/compare channel 2 Signal.
prsSignalTIMER2_UF	TIMER2 underflow Signal.
prsSignalTIMER2_OF	TIMER2 overflow Signal.
prsSignalTIMER2_CC0	TIMER2 capture/compare channel 0 Signal.
prsSignalTIMER2_CC1	TIMER2 capture/compare channel 1 Signal.
prsSignalTIMER2_CC2	TIMER2 capture/compare channel 2 Signal.
prsSignalTIMER3_UF	TIMER3 underflow Signal.
prsSignalTIMER3_OF	TIMER3 overflow Signal.
prsSignalTIMER3_CC0	TIMER3 capture/compare channel 0 Signal.
prsSignalTIMER3_CC1	TIMER3 capture/compare channel 1 Signal.
prsSignalTIMER3_CC2	TIMER3 capture/compare channel 2 Signal.
prsSignalTIMER4_UF	TIMER4 underflow Signal.
prsSignalTIMER4_OF	TIMER4 overflow Signal.
prsSignalTIMER4_CC0	TIMER4 capture/compare channel 0 Signal.
prsSignalTIMER4_CC1	TIMER4 capture/compare channel 1 Signal.
prsSignalTIMER4_CC2	TIMER4 capture/compare channel 2 Signal.
prsSignalLETIMER0_CH0	LETIMER0 channel 0 Signal.
prsSignalLETIMER0_CH1	LETIMER0 channel 1 Signal.
prsSignalCORE_CTIOUT0	CORE CTIOUT0 Signal.
prsSignalCORE_CTIOUT1	CORE CTIOUT1 Signal.
prsSignalCORE_CTIOUT2	CORE CTIOUT2 Signal.
prsSignalCORE_CTIOUT3	CORE CTIOUT3 Signal.
prsSignalCMUL_CLKOUT0	CMU CLKOUT0 Signal.
prsSignalCMUL_CLKOUT1	CMU CLKOUT1 Signal.
prsSignalCMUL_CLKOUT2	CMU CLKOUT2 Signal.
prsSignalPRSL_ASYNCH0	PRS channel 0 Signal.
prsSignalPRSL_ASYNCH1	PRS channel 1 Signal.
prsSignalPRSL_ASYNCH2	PRS channel 2 Signal.
prsSignalPRSL_ASYNCH3	PRS channel 3 Signal.
prsSignalPRSL_ASYNCH4	PRS channel 4 Signal.
prsSignalPRSL_ASYNCH5	PRS channel 5 Signal.
prsSignalPRSL_ASYNCH6	PRS channel 6 Signal.
prsSignalPRSL_ASYNCH7	PRS channel 7 Signal.
prsSignalPRS_ASYNCH8	PRS channel 8 Signal.
prsSignalPRS_ASYNCH9	PRS channel 9 Signal.
prsSignalPRS_ASYNCH10	PRS channel 10 Signal.
prsSignalPRS_ASYNCH11	PRS channel 11 Signal.
prsSignalRTCC_CCV0	RTCC capture/compare channel 0 Signal.
prsSignalRTCC_CCV1	RTCC capture/compare channel 1 Signal.
prsSignalRTCC_CCV2	RTCC capture/compare channel 2 Signal.
prsSignalBURTC_COMP	BURTC compare Signal.
prsSignalBURTC_OF	BURTC overflow Signal.
prsSignalUSART0_TXC	USART0 TX complete Signal.
prsSignalUSART0_RXDATA	USART0 RX data available Signal.
prsSignalUSART0_IRTX	USART0 IR TX Signal.
prsSignalUSART0_RTS	USART0 RTS Signal.
prsSignalUSART0_TX	USART0 TX Signal.
prsSignalUSART0_CS	USART0 chip select Signal.
prsSignalUSART1_TXC	USART1 TX complete Signal.
prsSignalUSART1_RXDATA	USART1 RX data available Signal.
prsSignalUSART1_IRTX	USART1 IR TX Signal.
prsSignalUSART1_RTS	USART1 RTS Signal.
prsSignalUSART1_TX	USART1 TX Signal.
prsSignalUSART1_CS	USART1 chip select Signal.
prsSignalIADC0_SCANENTRY	IADC0 scan entry Signal.
prsSignalIADC0_SCANTABLE	IADC0 scan table Signal.
prsSignalIADC0_SINGLE	IADC0 single Signal.
prsSignalGPIO_PIN0	GPIO Pin 0 Signal.
prsSignalGPIO_PIN1	GPIO Pin 1 Signal.
prsSignalGPIO_PIN2	GPIO Pin 2 Signal.
prsSignalGPIO_PIN3	GPIO Pin 3 Signal.
prsSignalGPIO_PIN4	GPIO Pin 4 Signal.
prsSignalGPIO_PIN5	GPIO Pin 5 Signal.
prsSignalGPIO_PIN6	GPIO Pin 6 Signal.
prsSignalGPIO_PIN7	GPIO Pin 7 Signal.
prsSignalLFRCO_CALMEAS
prsSignalLFRCO_SDM	LFRCO Calibration Measure Signal.
prsSignalLFRCO_TCMEAS	LFRCO Sigma Delta Modulator output Signal.

Definition at line 138 of file platform/emlib/inc/em_prs.h

PRS_Consumer_t#

PRS_Consumer_t

PRS Consumers.

Enumerator
prsConsumerNone	No PRS consumer.
prsConsumerCMU_CALDN	CMU calibration down consumer.
prsConsumerCMU_CALUP	CMU calibration up consumer.
prsConsumerIADC0_SCANTRIGGER	IADC0 scan trigger consumer.
prsConsumerIADC0_SINGLETRIGGER	IADC0 single trigger consumer.
prsConsumerLDMA_REQUEST0	LDMA Request 0 consumer.
prsConsumerLDMA_REQUEST1	LDMA Request 1 consumer.
prsConsumerLETIMER0_CLEAR	LETIMER0 clear consumer.
prsConsumerLETIMER0_START	LETIMER0 start consumer.
prsConsumerLETIMER0_STOP	LETIMER0 stop consumer.
prsConsumerTIMER0_CC0	TIMER0 capture/compare channel 0 consumer.
prsConsumerTIMER0_CC1	TIMER0 capture/compare channel 1 consumer.
prsConsumerTIMER0_CC2	TIMER0 capture/compare channel 2 consumer.
prsConsumerTIMER1_CC0	TIMER1 capture/compare channel 0 consumer.
prsConsumerTIMER1_CC1	TIMER1 capture/compare channel 1 consumer.
prsConsumerTIMER1_CC2	TIMER1 capture/compare channel 2 consumer.
prsConsumerTIMER2_CC0	TIMER2 capture/compare channel 0 consumer.
prsConsumerTIMER2_CC1	TIMER2 capture/compare channel 1 consumer.
prsConsumerTIMER2_CC2	TIMER2 capture/compare channel 2 consumer.
prsConsumerTIMER3_CC0	TIMER3 capture/compare channel 0 consumer.
prsConsumerTIMER3_CC1	TIMER3 capture/compare channel 1 consumer.
prsConsumerTIMER3_CC2	TIMER3 capture/compare channel 2 consumer.
prsConsumerTIMER4_CC0	TIMER4 capture/compare channel 0 consumer.
prsConsumerTIMER4_CC1	TIMER4 capture/compare channel 1 consumer.
prsConsumerTIMER4_CC2	TIMER4 capture/compare channel 2 consumer.
prsConsumerUSART0_CLK	USART0 clock consumer.
prsConsumerUSART0_IR	USART0 IR consumer.
prsConsumerUSART0_RX	USART0 RX consumer.
prsConsumerUSART0_TRIGGER	USART0 trigger consumer.
prsConsumerUSART1_CLK	USART1 clock consumer.
prsConsumerUSART1_IR	USART1 IR consumer.
prsConsumerUSART1_RX	USART1 TX consumer.
prsConsumerUSART1_TRIGGER	USART1 trigger consumer.
prsConsumerEUART0_RX	EUART0 RX consumer.
prsConsumerEUART0_TRIGGER	EUART0 TRIGGER Consumer.
prsConsumerWDOG0_SRC0	WDOG0 source 0 consumer.
prsConsumerWDOG0_SRC1	WDOG0 source 1 consumer.
prsConsumerRTCC_CC0	RTCC capture/compare channel 0 consumer.
prsConsumerRTCC_CC1	RTCC capture/compare channel 1 consumer.
prsConsumerRTCC_CC2	RTCC capture/compare channel 2 consumer.

Definition at line 857 of file platform/emlib/inc/em_prs.h

Function Documentation#

PRS_LevelSet#

void PRS_LevelSet (uint32_t level, uint32_t mask)

Set level control bit for one or more channels.

Parameters

[in]	level	Level to use for channels indicated by `mask`. Use logical OR combination of PRS_SWLEVEL_CHnLEVEL defines for channels to set high level, otherwise 0.
[in]	mask	Mask indicating which channels to set level for. Use logical OR combination of PRS_SWLEVEL_CHnLEVEL defines.

The level value for a channel is XORed with both the pulse possibly issued by PRS_PulseTrigger() and the PRS input signal selected for the channel(s).

Note

Note that software level control is only available for asynchronous channels on Series 2 devices.

Definition at line 1016 of file platform/emlib/inc/em_prs.h

PRS_LevelGet#

uint32_t PRS_LevelGet (void )

Get level control bit for all channels.

Parameters

N/A

Returns

The current software level configuration.

Definition at line 1032 of file platform/emlib/inc/em_prs.h

PRS_Values#

uint32_t PRS_Values (PRS_ChType_t type)

Get the PRS channel values for all channels.

Parameters

[in]

type

PRS channel type. This can be either prsTypeAsync or prsTypeSync.

Returns

The current PRS channel output values for all channels as a bitset.

Definition at line 1053 of file platform/emlib/inc/em_prs.h

PRS_ChannelValue#

bool PRS_ChannelValue (unsigned int ch, PRS_ChType_t type)

Get the PRS channel value for a single channel.

Parameters

[in]	ch	PRS channel number.
[in]	type	PRS channel type. This can be either prsTypeAsync or prsTypeSync.

Returns

The current PRS channel output value. This is either 0 or 1.

Definition at line 1081 of file platform/emlib/inc/em_prs.h

PRS_PulseTrigger#

void PRS_PulseTrigger (uint32_t channels)

Trigger a high pulse (one HFPERCLK) for one or more channels.

Parameters

[in]

channels

Logical ORed combination of channels to trigger a pulse for. Use PRS_SWPULSE_CHnPULSE defines.

Setting a bit for a channel causes the bit in the register to remain high for one HFPERCLK cycle. Pulse is XORed with both the corresponding bit in PRS SWLEVEL register and the PRS input signal selected for the channel(s).

Definition at line 1101 of file platform/emlib/inc/em_prs.h

PRS_ChannelLevelSet#

void PRS_ChannelLevelSet (unsigned int ch, bool level)

Set the PRS channel level for one asynchronous PRS channel.

Parameters

[in]	ch	PRS channel number.
[in]	level	true to set the level high (1) and false to set the level low (0).

Definition at line 1120 of file platform/emlib/inc/em_prs.h

PRS_ChannelPulse#

void PRS_ChannelPulse (unsigned int ch)

Trigger a pulse on one PRS channel.

Parameters

[in]

PRS channel number.

Definition at line 1132 of file platform/emlib/inc/em_prs.h

PRS_SourceSignalSet#

void PRS_SourceSignalSet (unsigned int ch, uint32_t source, uint32_t signal, PRS_Edge_TypeDef edge)

Set a source and signal for a channel.

Parameters

[in]	ch	A channel to define the signal and source for.
[in]	source	A source to select for the channel. Use one of PRS_CH_CTRL_SOURCESEL_x defines.
[in]	signal	A signal (for selected `source`) to use. Use one of PRS_CH_CTRL_SIGSEL_x defines.
[in]	edge	An edge (for selected source/signal) to generate the pulse for.

Definition at line 323 of file platform/emlib/src/em_prs.c

PRS_SourceAsyncSignalSet#

void PRS_SourceAsyncSignalSet (unsigned int ch, uint32_t source, uint32_t signal)

Set the source and asynchronous signal for a channel.

Parameters

[in]	ch	A channel to define the source and asynchronous signal for.
[in]	source	A source to select for the channel. Use one of PRS_CH_CTRL_SOURCESEL_x defines.
[in]	signal	An asynchronous signal (for selected `source`) to use. Use one of the PRS_CH_CTRL_SIGSEL_x defines that support asynchronous operation.

Asynchronous reflexes are not clocked on HFPERCLK and can be used even in EM2/EM3. There is a limitation to reflexes operating in asynchronous mode in that they can only be used by a subset of the reflex consumers. See the PRS chapter in the reference manual for the complete list of supported asynchronous signals and consumers.

Note

This function is not supported on EFM32GxxxFyyy parts. In asynchronous mode, the edge detector only works in EM0 and should not be used. The EDSEL parameter in PRS_CHx_CTRL register is set to 0 (OFF) by default.

Definition at line 370 of file platform/emlib/src/em_prs.c

PRS_GetFreeChannel#

int PRS_GetFreeChannel (PRS_ChType_t type)

Search for the first free PRS channel.

Parameters

[in]

type

PRS channel type. This can be either prsTypeAsync or prsTypeSync.

Returns

Channel number >= 0 if an unused PRS channel was found. If no free PRS channel was found then -1 is returned.

Definition at line 428 of file platform/emlib/src/em_prs.c

PRS_Reset#

void PRS_Reset (void )

Reset all PRS channels.

Parameters

N/A

This function will reset all the PRS channel configuration.

Definition at line 457 of file platform/emlib/src/em_prs.c

PRS_ConnectSignal#

void PRS_ConnectSignal (unsigned int ch, PRS_ChType_t type, PRS_Signal_t signal)

Connect a PRS signal to a channel.

Parameters

[in]	ch	PRS channel number.
[in]	type	PRS channel type. This can be either prsTypeAsync or prsTypeSync.
[in]	signal	This is the PRS signal that should be placed on the channel.

This function will make the PRS signal available on the specific channel. Only a single PRS signal can be connected to any given channel.

Definition at line 495 of file platform/emlib/src/em_prs.c

PRS_ConvertToSyncSource#

uint32_t PRS_ConvertToSyncSource (uint32_t asyncSource)

Convert an async PRS source to a sync source.

Parameters

[in]

asyncSource

The id of the asynchronous PRS source.

This conversion must be done because the id's of the same peripheral source is different depending on if it's used as an asynchronous PRS source or a synchronous PRS source.

Returns

The id of the corresponding synchronous PRS source.

Definition at line 126 of file platform/emlib/src/em_prs.c

PRS_ConvertToSyncSignal#

uint32_t PRS_ConvertToSyncSignal (uint32_t asyncSource, uint32_t asyncSignal)

Convert an async PRS signal to a sync signal.

Parameters

[in]	asyncSource	The id of the asynchronous PRS source.
[in]	asyncSignal	The id of the asynchronous PRS signal.

PRS values for some peripherals signals differ between asynchronous and synchronous PRS channels. This function must be used to handle the conversion.

Returns

The id of the corresponding synchronous PRS signal.

Definition at line 206 of file platform/emlib/src/em_prs.c

PRS_ConnectConsumer#

void PRS_ConnectConsumer (unsigned int ch, PRS_ChType_t type, PRS_Consumer_t consumer)

Connect a peripheral consumer to a PRS channel.

Parameters

[in]	ch	PRS channel number.
[in]	type	PRS channel type. This can be either prsTypeAsync or prsTypeSync.
[in]	consumer	This is the PRS consumer.

Different peripherals can use PRS channels as their input. This function can be used to connect a peripheral consumer to a PRS channel. Multiple consumers can be connected to a single PRS channel.

Definition at line 554 of file platform/emlib/src/em_prs.c

PRS_PinOutput#

void PRS_PinOutput (unsigned int ch, PRS_ChType_t type, GPIO_Port_TypeDef port, uint8_t pin)

Send the output of a PRS channel to a GPIO pin.

Parameters

[in]	ch	PRS channel number.
[in]	type	PRS channel type. This can be either prsTypeAsync or prsTypeSync.
[in]	port	GPIO port
[in]	pin	GPIO pin

This function is used to send the output of a PRS channel to a GPIO pin. Note that there are certain restrictions to where a PRS channel can be routed. Consult the datasheet of the device to see if a channel can be routed to the requested GPIO pin. Some devices for instance can only route the async channels 0-5 on GPIO pins PAx and PBx while async channels 6-11 can only be routed to GPIO pins PCx and PDx

Definition at line 595 of file platform/emlib/src/em_prs.c

PRS_Combine#

void PRS_Combine (unsigned int chA, unsigned int chB, PRS_Logic_t logic)

Combine two PRS channels using a logic function.

Parameters

[in]	chA	PRS Channel for the A input.
[in]	chB	PRS Channel for the B input.
[in]	logic	The logic function to use when combining the Channel A and Channel B. The output of the logic function is the output of Channel A. Function like AND, OR, XOR, NOT and more are available.

This function allows you to combine the output of one PRS channel with the the signal of another PRS channel using various logic functions. Note that for series 2, config 1 devices, the hardware only allows a PRS channel to be combined with the previous channel. So for instance channel 5 can be combined only with channel 4.

The logic function operates on two PRS channels called A and B. The output of PRS channel B is combined with the PRS source configured for channel A to produce an output. This output is used as the output of channel A.

Definition at line 640 of file platform/emlib/src/em_prs.c

Macro Definition Documentation#

PRS_SYNC_CHAN_COUNT#

#define PRS_SYNC_CHAN_COUNT

Value:

PRS_SYNC_CH_NUM

PRS Synchronous channel count.

Definition at line 57 of file platform/emlib/inc/em_prs.h

PRS_ASYNC_CHAN_COUNT#

#define PRS_ASYNC_CHAN_COUNT

Value:

PRS_ASYNC_CH_NUM

PRS Asynchronous channel count.

Definition at line 59 of file platform/emlib/inc/em_prs.h

PRS_ASYNC_SUPPORTED#

#define PRS_ASYNC_SUPPORTED

Value:

PRS asynchronous support.

Definition at line 74 of file platform/emlib/inc/em_prs.h