Description

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.

Functions
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.

void	PRS_GpioOutputLocation (unsigned int ch, unsigned int location)
	Send the output of a PRS channel to a GPIO pin.

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.

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.

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.

Macros
#define	PRS_SYNC_CHAN_COUNT PRS_CHAN_COUNT
	PRS Synchronous channel count.

#define	PRS_ASYNC_CHAN_COUNT PRS_CHAN_COUNT
	PRS Asynchronous channel count.

#define	PRS_ASYNC_SUPPORTED 1
	PRS asynchronous support.

Enumerations
enum	PRS_ChType_t { prsTypeAsync , prsTypeSync }
	PRS Channel type.

enum	PRS_Edge_TypeDef { prsEdgeOff , prsEdgePos , prsEdgeNeg , prsEdgeBoth }
	Edge detection type.

enum	PRS_Signal_t { prsSignalNone = PRS_CH_CTRL_SOURCESEL_NONE \| (0x0 << _PRS_CH_CTRL_SIGSEL_SHIFT), prsSignalSW = PRS_CH_CTRL_SOURCESEL_NONE \| (0x1 << _PRS_CH_CTRL_SIGSEL_SHIFT), prsSignalADC0_SINGLE = PRS_ADC0_SINGLE, prsSignalADC0_SCAN = PRS_ADC0_SCAN, 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, prsSignalPCNT0_TCC = PRS_PCNT0_TCC, prsSignalRTC_OF = PRS_RTC_OF, prsSignalRTC_COMP0 = PRS_RTC_COMP0, prsSignalRTC_COMP1 = PRS_RTC_COMP1, prsSignalACMP0_OUT = PRS_ACMP0_OUT, prsSignalUSART1_TXC = PRS_USART1_TXC, prsSignalUSART1_RXDATAV = PRS_USART1_RXDATAV, prsSignalUSART1_IRTX = PRS_USART1_IRTX, 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, prsSignalGPIO_PIN8 = PRS_GPIO_PIN8, prsSignalGPIO_PIN9 = PRS_GPIO_PIN9, prsSignalGPIO_PIN10 = PRS_GPIO_PIN10, prsSignalGPIO_PIN11 = PRS_GPIO_PIN11, prsSignalGPIO_PIN12 = PRS_GPIO_PIN12, prsSignalGPIO_PIN13 = PRS_GPIO_PIN13, prsSignalGPIO_PIN14 = PRS_GPIO_PIN14, prsSignalGPIO_PIN15 = PRS_GPIO_PIN15 }
	PRS Signal.

Function Documentation

◆ 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.

◆ PRS_SourceAsyncSignalSet()

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

Set the source and asynchronous signal for a channel.

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.

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.

◆ PRS_GpioOutputLocation()

void PRS_GpioOutputLocation	(	unsigned int	`ch,`
		unsigned int	`location`
	)

Send the output of a PRS channel to a 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.

Parameters

[in]	`ch`	PRS channel number.
[in]	`location`	PRS routing location.

◆ 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.

◆ PRS_Reset()

void PRS_Reset ( void )

Reset all PRS channels.

This function will reset all the PRS channel configuration.

◆ PRS_ConnectSignal()

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

Connect a PRS signal to a 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.

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.

◆ PRS_LevelSet()

void PRS_LevelSet	(	uint32_t	`level,`
		uint32_t	`mask`
	)

inline

Set level control bit for one or more channels.

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).

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.

◆ PRS_LevelGet()

uint32_t PRS_LevelGet ( void )

inline

Get level control bit for all channels.

Returns: The current software level configuration.

◆ PRS_PulseTrigger()

void PRS_PulseTrigger ( uint32_t channels )

inline

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

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).

Parameters

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

◆ PRS_ChannelLevelSet()

void PRS_ChannelLevelSet	(	unsigned int	`ch,`
		bool	`level`
	)

inline

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).

◆ PRS_ChannelPulse()

void PRS_ChannelPulse ( unsigned int ch )

inline

Trigger a pulse on one PRS channel.

Parameters

[in] ch PRS channel number.

Macro Definition Documentation

◆ PRS_SYNC_CHAN_COUNT

#define PRS_SYNC_CHAN_COUNT PRS_CHAN_COUNT

PRS Synchronous channel count.

◆ PRS_ASYNC_CHAN_COUNT

#define PRS_ASYNC_CHAN_COUNT PRS_CHAN_COUNT

PRS Asynchronous channel count.

◆ PRS_ASYNC_SUPPORTED

#define PRS_ASYNC_SUPPORTED 1

PRS asynchronous support.

Enumeration Type Documentation

◆ PRS_ChType_t

enum PRS_ChType_t

PRS Channel type.

Enumerator
prsTypeAsync	Asynchronous channel type.
prsTypeSync	Synchronous channel type.

◆ PRS_Edge_TypeDef

enum 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.

◆ PRS_Signal_t

enum PRS_Signal_t

PRS Signal.

Enumerator
prsSignalNone	No Signal.
prsSignalSW	Software-reserved Signal.
prsSignalADC0_SINGLE	ADC0_SINGLE signal.
prsSignalADC0_SCAN	ADC0_SCAN 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.
prsSignalPCNT0_TCC	PCNT0_TCC Signal.
prsSignalRTC_OF	RTC_OF signal.
prsSignalRTC_COMP0	RTC_COMP0 signal.
prsSignalRTC_COMP1	RTC_COMP1 signal.
prsSignalACMP0_OUT	ACMP0 Signal.
prsSignalUSART1_TXC	USART1 tx complete Signal.
prsSignalUSART1_RXDATAV	USART1 rx data available Signal.
prsSignalUSART1_IRTX	USART1 IR tx 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.
prsSignalGPIO_PIN8	GPIO Pin 8 Signal.
prsSignalGPIO_PIN9	GPIO Pin 9 Signal.
prsSignalGPIO_PIN10	GPIO Pin 10 Signal.
prsSignalGPIO_PIN11	GPIO Pin 11 Signal.
prsSignalGPIO_PIN12	GPIO Pin 12 Signal.
prsSignalGPIO_PIN13	GPIO Pin 13 Signal.
prsSignalGPIO_PIN14	GPIO Pin 14 Signal.
prsSignalGPIO_PIN15	GPIO Pin 15 Signal.

PRS - Peripheral Reflex System

Description

Functions

Macros

Enumerations

Function Documentation

◆ PRS_SourceSignalSet()

◆ PRS_SourceAsyncSignalSet()

◆ PRS_GpioOutputLocation()

◆ PRS_GetFreeChannel()

◆ PRS_Reset()

◆ PRS_ConnectSignal()

◆ PRS_LevelSet()

◆ PRS_LevelGet()

◆ PRS_PulseTrigger()

◆ PRS_ChannelLevelSet()

◆ PRS_ChannelPulse()

Macro Definition Documentation

◆ PRS_SYNC_CHAN_COUNT

◆ PRS_ASYNC_CHAN_COUNT

◆ PRS_ASYNC_SUPPORTED

Enumeration Type Documentation

◆ PRS_ChType_t

◆ PRS_Edge_TypeDef

◆ PRS_Signal_t