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_Deinit (INPUTMUX_Type *base)
	Deinitialize INPUTMUX peripheral. More...

Input multiplexing connections
enum	_inputmux_connection_t {   kINPUTMUX_SctGpi0ToSct0 = 0U + (SCT0_PMUX_ID << PMUX_SHIFT) ,   kINPUTMUX_I2sS7clkToSct0 = 24U + (SCT0_PMUX_ID << PMUX_SHIFT) ,   kINPUTMUX_FreqmeGpioClk_b = 7U + (FREQMEAS_PMUX_ID << PMUX_SHIFT) ,   kINPUTMUX_GpioPort1Pin31ToPintsel = 63U + (PINTSEL_PMUX_ID << PMUX_SHIFT) ,   kINPUTMUX_Otrig3ToDma = 21U + (DMA_TRIG0_PMUX_ID << PMUX_SHIFT) }
	INPUTMUX connections type. More...
typedef enum _inputmux_connection_t	inputmux_connection_t
	INPUTMUX connections type.
#define	SCT0_PMUX_ID   0x00U
	Periphinmux IDs.
#define	PINTSEL_PMUX_ID   0xC0U
#define	DMA_TRIG0_PMUX_ID   0xE0U
#define	DMA_OTRIG_PMUX_ID   0x160U
#define	FREQMEAS_PMUX_ID   0x180U
#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	SCT INMUX.
kINPUTMUX_I2sS7clkToSct0	Frequency measure.
kINPUTMUX_FreqmeGpioClk_b	Pin Interrupt.
kINPUTMUX_GpioPort1Pin31ToPintsel	DMA ITRIG.
kINPUTMUX_Otrig3ToDma	DMA OTRIG.

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_Deinit

(

INPUTMUX_Type *

base

)

This function disables the INPUTMUX clock.

Parameters

base	Base address of the INPUTMUX peripheral.

Return values

None.