PRS
EMLIB

Detailed 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.

Macros

#define PRS_ASYNC_CHAN_COUNT PRS_ASYNC_CH_NUM
#define PRS_ASYNC_SUPPORTED 1
#define PRS_BURTC_OF PRS_BURTC_OVERFLOW
#define PRS_SYNC_CHAN_COUNT PRS_SYNC_CH_NUM

Enumerations

enum PRS_ChType_t {
prsTypeAsync ,
prsTypeSync
}
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),
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),
prsConsumerUSART2_CLK = offsetof(PRS_TypeDef, CONSUMER_USART2_CLK),
prsConsumerUSART2_IR = offsetof(PRS_TypeDef, CONSUMER_USART2_IR),
prsConsumerUSART2_RX = offsetof(PRS_TypeDef, CONSUMER_USART2_RX),
prsConsumerUSART2_TRIGGER = offsetof(PRS_TypeDef, CONSUMER_USART2_TRIGGER),
prsConsumerWDOG0_SRC0 = offsetof(PRS_TypeDef, CONSUMER_WDOG0_SRC0),
prsConsumerWDOG0_SRC1 = offsetof(PRS_TypeDef, CONSUMER_WDOG0_SRC1),
prsConsumerWDOG1_SRC0 = offsetof(PRS_TypeDef, CONSUMER_WDOG1_SRC0),
prsConsumerWDOG1_SRC1 = offsetof(PRS_TypeDef, CONSUMER_WDOG1_SRC1)
}
enum PRS_Edge_TypeDef {
prsEdgeOff ,
prsEdgePos ,
prsEdgeNeg ,
prsEdgeBoth
}
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_A_OR_NOT_B = _PRS_ASYNC_CH_CTRL_FNSEL_A_OR_NOT_B,
prsLogic_A = _PRS_ASYNC_CH_CTRL_FNSEL_A,
prsLogic_NOT_A_OR_B = _PRS_ASYNC_CH_CTRL_FNSEL_NOT_A_OR_B,
prsLogic_A_OR_B = _PRS_ASYNC_CH_CTRL_FNSEL_A_OR_B,
prsLogic_One = _PRS_ASYNC_CH_CTRL_FNSEL_LOGICAL_ONE
}
enum PRS_Signal_t {
prsSignalNone = 0x0,
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,
prsSignalLETIMER0_CH0 = PRS_LETIMER0_CH0,
prsSignalLETIMER0_CH1 = PRS_LETIMER0_CH1,
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,
prsSignalACMP0_OUT = PRS_ACMP0_OUT,
prsSignalACMP1_OUT = PRS_ACMP1_OUT,
prsSignalUSART0_IRTX = PRS_USART0_IRTX,
prsSignalUSART0_TXC = PRS_USART0_TXC,
prsSignalUSART0_RXDATA = PRS_USART0_RXDATA,
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,
prsSignalUSART2_TXC = PRS_USART2_TXC,
prsSignalUSART2_RXDATA = PRS_USART2_RXDATA,
prsSignalUSART2_IRTX = PRS_USART2_IRTX,
prsSignalUSART2_RTS = PRS_USART2_RTS,
prsSignalUSART2_TX = PRS_USART2_TX,
prsSignalUSART2_CS = PRS_USART2_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
}

Functions

__STATIC_INLINE void PRS_ChannelLevelSet (unsigned int ch, bool level)
Set the PRS channel level for one asynchronous PRS channel.
__STATIC_INLINE void PRS_ChannelPulse (unsigned int ch)
Trigger a pulse on one PRS channel.
__STATIC_INLINE bool PRS_ChannelValue (unsigned int ch, PRS_ChType_t type)
Get the PRS channel value for a single channel.
void PRS_Combine (unsigned int chA, unsigned int chB, PRS_Logic_t logic)
Combine two PRS channels using a logic function.
void PRS_ConnectConsumer (unsigned int ch, PRS_ChType_t type, PRS_Consumer_t consumer)
Connect a peripheral consumer to a PRS channel.
void PRS_ConnectSignal (unsigned int ch, PRS_ChType_t type, PRS_Signal_t signal)
Connect a PRS signal to a channel.
int PRS_GetFreeChannel ( PRS_ChType_t type)
Search for the first free PRS channel.
__STATIC_INLINE uint32_t PRS_LevelGet (void)
Get level control bit for all channels.
__STATIC_INLINE void PRS_LevelSet (uint32_t level, uint32_t mask)
Set level control bit for one or more channels.
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.
__STATIC_INLINE void PRS_PulseTrigger (uint32_t channels)
Trigger a high pulse (one HFPERCLK) for one or more channels.
void PRS_Reset (void)
Reset all PRS channels.
void PRS_SourceAsyncSignalSet (unsigned int ch, uint32_t source, uint32_t signal)
Set the source and asynchronous signal for a 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.
__STATIC_INLINE uint32_t PRS_Values ( PRS_ChType_t type)
Get the PRS channel values for all channels.

Enumeration Type Documentation

enum PRS_ChType_t

PRS Channel type.

Enumerator
prsTypeAsync

Asynchronous channel type.

prsTypeSync

Synchronous channel type.

Definition at line 98 of file em_prs.h .

enum 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.

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 rx consumer.

prsConsumerUSART1_TRIGGER

USART1 trigger consumer.

prsConsumerUSART2_CLK

USART2 clock consumer.

prsConsumerUSART2_IR

USART2 IR consumer.

prsConsumerUSART2_RX

USART2 rx consumer.

prsConsumerUSART2_TRIGGER

USART2 trigger consumer.

prsConsumerWDOG0_SRC0

WDOG0 source 0 consumer.

prsConsumerWDOG0_SRC1

WDOG0 source 1 consumer.

prsConsumerWDOG1_SRC0

WDOG1 source 0 consumer.

prsConsumerWDOG1_SRC1

WDOG1 source 1 consumer.

Definition at line 255 of file em_prs.h .

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.

Definition at line 104 of file em_prs.h .

enum PRS_Logic_t

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

Definition at line 113 of file em_prs.h .

enum PRS_Signal_t

PRS Signal.

Enumerator
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.

prsSignalLETIMER0_CH0

LETIMER0 channel 0 Signal.

prsSignalLETIMER0_CH1

LETIMER0 channel 1 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.

prsSignalACMP0_OUT

ACMP0 Signal.

prsSignalACMP1_OUT

ACMP1 output Signal.

prsSignalUSART0_IRTX

USART0 IR tx Signal.

prsSignalUSART0_TXC

USART0 tx complete Signal.

prsSignalUSART0_RXDATA

USART0 rx data available 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.

prsSignalUSART2_TXC

USART2 tx complete Signal.

prsSignalUSART2_RXDATA

USART2 rx data available Signal.

prsSignalUSART2_IRTX

USART2 IR tx Signal.

prsSignalUSART2_RTS

USART2 RTS Signal.

prsSignalUSART2_TX

USART2 tx Signal.

prsSignalUSART2_CS

USART2 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.

Definition at line 134 of file em_prs.h .

Function Documentation

__STATIC_INLINE 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 435 of file em_prs.h .

References PRS_LevelSet() .

__STATIC_INLINE void PRS_ChannelPulse ( unsigned int ch )

Trigger a pulse on one PRS channel.

Parameters
[in] ch PRS channel number.

Definition at line 447 of file em_prs.h .

References PRS_PulseTrigger() .

__STATIC_INLINE 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 396 of file em_prs.h .

References PRS_Values() .

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

Combine two PRS channels using a logic function.

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.

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.

Definition at line 527 of file em_prs.c .

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

Connect a peripheral consumer to a PRS channel.

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.

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.

Definition at line 441 of file em_prs.c .

References prsConsumerNone , and prsTypeAsync .

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.

Definition at line 382 of file em_prs.c .

References prsTypeAsync .

Referenced by PRS_SourceAsyncSignalSet() .

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 315 of file em_prs.c .

References prsTypeAsync .

__STATIC_INLINE uint32_t PRS_LevelGet ( void )

Get level control bit for all channels.

Returns
The current software level configuration.

Definition at line 347 of file em_prs.h .

__STATIC_INLINE void PRS_LevelSet ( uint32_t level,
uint32_t mask
)

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).

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

Definition at line 331 of file em_prs.h .

Referenced by PRS_ChannelLevelSet() .

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.

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

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

Definition at line 482 of file em_prs.c .

References prsTypeAsync .

__STATIC_INLINE void PRS_PulseTrigger ( uint32_t channels )

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.

Definition at line 416 of file em_prs.h .

Referenced by PRS_ChannelPulse() .

void PRS_Reset ( void )

Reset all PRS channels.

This function will reset all the PRS channel configuration.

Definition at line 344 of file em_prs.c .

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.

Definition at line 257 of file em_prs.c .

References PRS_ConnectSignal() , and prsTypeAsync .

Referenced by adcDeInit() , ezradio_hal_GpioInit() , MIC_deInit() , and MIC_init() .

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 210 of file em_prs.c .

__STATIC_INLINE 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 368 of file em_prs.h .

References prsTypeAsync .

Referenced by PRS_ChannelValue() .