INPUTMUX: Input Multiplexing Driver

Overview

The MCUXpresso SDK provides a driver for the Input multiplexing (INPUTMUX).
It configures the inputs to the pin interrupt block, DMA trigger, and frequency measure function. Once configured, the clock is not needed for the inputmux.

Input Multiplexing Driver operation

INPUTMUX_AttachSignal function configures the specified input

Typical use case

Refer to the driver examples codes located at <SDK_ROOT>/boards/<BOARD>/driver_examples/inputmux

Files
file	fsl_inputmux.h
file	fsl_inputmux_connections.h

Functions
void	INPUTMUX_Init (INPUTMUX_Type *base)
	Initialize INPUTMUX peripheral. More...
void	INPUTMUX_AttachSignal (INPUTMUX_Type *base, uint32_t index, inputmux_connection_t connection)
	Attaches a signal. More...
void	INPUTMUX_EnableSignal (INPUTMUX_Type *base, inputmux_signal_t signal, bool enable)
	Enable/disable a signal. More...
void	INPUTMUX_Deinit (INPUTMUX_Type *base)
	Deinitialize INPUTMUX peripheral. More...

Input multiplexing connections
enum	_inputmux_connection_t {   kINPUTMUX_SctGpi0ToSct0 = 0U + (SCT0_INMUX0 << PMUX_SHIFT) ,   kINPUTMUX_DebugHaltedToSct0 = 23U + (SCT0_INMUX0 << PMUX_SHIFT) ,   kINPUTMUX_I2sSharedWs1ToTimer0Captsel = 24U + (TIMER0CAPTSEL0 << PMUX_SHIFT) ,   kINPUTMUX_I2sSharedWs1ToTimer1Captsel = 24U + (TIMER1CAPTSEL0 << PMUX_SHIFT) ,   kINPUTMUX_I2sSharedWs1ToTimer2Captsel = 24U + (TIMER2CAPTSEL0 << PMUX_SHIFT) ,   kINPUTMUX_GpioPort1Pin31ToPintsel = 63U + (PINTSEL0 << PMUX_SHIFT) ,   kINPUTMUX_HashDmaRxToDma0 = 21U + (DMA0_ITRIG_INMUX0 << PMUX_SHIFT) ,   kINPUTMUX_Dma0Adc0Ch1TrigoutToTriginChannels = 22U + (DMA0_OTRIG_INMUX0 << PMUX_SHIFT) ,   kINPUTMUX_FreqmeGpioClk_bRef = 7u + (FREQMEAS_REF_REG << PMUX_SHIFT) ,   kINPUTMUX_FreqmeGpioClk_bTarget = 7u + (FREQMEAS_TARGET_REG << PMUX_SHIFT) ,   kINPUTMUX_I2sSharedWs1ToTimer3Captsel = 24U + (TIMER3CAPTSEL0 << PMUX_SHIFT) ,   kINPUTMUX_GpioPort0Pin31ToPintSecsel = 31U + (PINTSECSEL0 << PMUX_SHIFT) ,   kINPUTMUX_HashDmaRxToDma1 = 14U + (DMA1_ITRIG_INMUX0 << PMUX_SHIFT) }
	INPUTMUX connections type. More...
enum	_inputmux_signal_t {   kINPUTMUX_HashCryptToDmac0Ch0RequestEna = 0U + (DMA0_REQ_ENA_ID << ENA_SHIFT) ,   kINPUTMUX_Adc0FIFO1ToDmac0Ch22RequestEna = 22U + (DMA0_REQ_ENA_ID << ENA_SHIFT) ,   kINPUTMUX_Flexcomm3TxToDmac1Ch9RequestEna = 9U + (DMA1_REQ_ENA_ID << ENA_SHIFT) ,   kINPUTMUX_Dmac0InputTriggerHashOutEna = 21U + (DMA0_ITRIG_ENA_ID << ENA_SHIFT) }
	INPUTMUX signal enable/disable type. More...
typedef enum _inputmux_connection_t	inputmux_connection_t
	INPUTMUX connections type.
typedef enum _inputmux_signal_t	inputmux_signal_t
	INPUTMUX signal enable/disable type.
#define	SCT0_INMUX0   0x00U
	Periphinmux IDs.
#define	TIMER0CAPTSEL0   0x20U
#define	TIMER1CAPTSEL0   0x40U
#define	TIMER2CAPTSEL0   0x60U
#define	PINTSEL_PMUX_ID   0xC0U
#define	PINTSEL0   0xC0U
#define	DMA0_ITRIG_INMUX0   0xE0U
#define	DMA0_OTRIG_INMUX0   0x160U
#define	FREQMEAS_REF_REG   0x180U
#define	FREQMEAS_TARGET_REG   0x184U
#define	TIMER3CAPTSEL0   0x1A0U
#define	TIMER4CAPTSEL0   0x1C0U
#define	PINTSECSEL0   0x1E0U
#define	DMA1_ITRIG_INMUX0   0x200U
#define	DMA1_OTRIG_INMUX0   0x240U
#define	DMA0_REQ_ENA_ID   0x740U
#define	DMA1_REQ_ENA_ID   0x760U
#define	DMA0_ITRIG_ENA_ID   0x780U
#define	DMA1_ITRIG_ENA_ID   0x7A0U
#define	ENA_SHIFT   8U
#define	PMUX_SHIFT   20U

Driver version
#define	FSL_INPUTMUX_DRIVER_VERSION   (MAKE_VERSION(2, 0, 7))
	Group interrupt driver version for SDK.

Enumeration Type Documentation

enum _inputmux_connection_t

Enumerator
kINPUTMUX_SctGpi0ToSct0	SCT0 INMUX.
kINPUTMUX_DebugHaltedToSct0	TIMER0 CAPTSEL.
kINPUTMUX_I2sSharedWs1ToTimer0Captsel	TIMER1 CAPTSEL.
kINPUTMUX_I2sSharedWs1ToTimer1Captsel	TIMER2 CAPTSEL.
kINPUTMUX_I2sSharedWs1ToTimer2Captsel	Pin interrupt select.
kINPUTMUX_GpioPort1Pin31ToPintsel	DMA0 Input trigger.
kINPUTMUX_HashDmaRxToDma0	DMA0 output trigger.
kINPUTMUX_Dma0Adc0Ch1TrigoutToTriginChannels	Selection for frequency measurement reference clock.
kINPUTMUX_FreqmeGpioClk_bRef	Selection for frequency measurement target clock.
kINPUTMUX_FreqmeGpioClk_bTarget	TIMER3 CAPTSEL.
kINPUTMUX_I2sSharedWs1ToTimer3Captsel	Timer4 CAPTSEL.
kINPUTMUX_GpioPort0Pin31ToPintSecsel	DMA1 Input trigger.
kINPUTMUX_HashDmaRxToDma1	DMA1 output trigger.

enum _inputmux_signal_t

Enumerator
kINPUTMUX_HashCryptToDmac0Ch0RequestEna	DMA0 REQ signal.
kINPUTMUX_Adc0FIFO1ToDmac0Ch22RequestEna	DMA1 REQ signal.
kINPUTMUX_Flexcomm3TxToDmac1Ch9RequestEna	DMA0 input trigger source enable.
kINPUTMUX_Dmac0InputTriggerHashOutEna	DMA1 input trigger source enable.

Function Documentation

void INPUTMUX_Init

(

INPUTMUX_Type *

base

)

This function enables the INPUTMUX clock.

Parameters

base	Base address of the INPUTMUX peripheral.

Return values

None.

void INPUTMUX_AttachSignal	(	INPUTMUX_Type *	base,
		uint32_t	index,
		inputmux_connection_t	connection
	)

This function attaches multiplexed signals from INPUTMUX to target signals. For example, to attach GPIO PORT0 Pin 5 to PINT peripheral, do the following:

*      INPUTMUX_AttachSignal(INPUTMUX, 2, kINPUTMUX_GpioPort0Pin5ToPintsel);
* 

In this example, INTMUX has 8 registers for PINT, PINT_SEL0~PINT_SEL7. With parameter index specified as 2, this function configures register PINT_SEL2.

Parameters

base	Base address of the INPUTMUX peripheral.
index	The serial number of destination register in the group of INPUTMUX registers with same name.
connection	Applies signal from source signals collection to target signal.

Return values

None.

void INPUTMUX_EnableSignal	(	INPUTMUX_Type *	base,
		inputmux_signal_t	signal,
		bool	enable
	)

This function gates the INPUTPMUX clock.

Parameters

base	Base address of the INPUTMUX peripheral.
signal	Enable signal register id and bit offset.
enable	Selects enable or disable.

Return values

None.

void INPUTMUX_Deinit

(

INPUTMUX_Type *

base

)

This function disables the INPUTMUX clock.

Parameters

base	Base address of the INPUTMUX peripheral.

Return values

None.