Overview

The MCUXpresso SDK provides a driver for the Port Control and Interrupts (PORT) module of MCUXpresso SDK devices.

Typical configuration use case

Input PORT configuration

/* Input pin PORT configuration */
port_pin_config_t config = {
    kPORT_PullUp,
    kPORT_FastSlewRate,
    kPORT_PassiveFilterDisable,
    kPORT_OpenDrainDisable,
    kPORT_LowDriveStrength,
    kPORT_MuxAsGpio,
    kPORT_UnLockRegister,
};
/*  Sets the configuration */
PORT_SetPinConfig(PORTA, 4, &config);

I2C PORT Configuration

/*  I2C pin PORTconfiguration */
port_pin_config_t config = {
    kPORT_PullUp,
    kPORT_FastSlewRate,
    kPORT_PassiveFilterDisable,
    kPORT_OpenDrainEnable,
    kPORT_LowDriveStrength,
    kPORT_MuxAlt5,
    kPORT_UnLockRegister,
};
PORT_SetPinConfig(PORTE,24u,&config);
PORT_SetPinConfig(PORTE,25u,&config);

Data Structures
struct	port_pin_config_t
	PORT pin configuration structure. More...

Enumerations
enum	_port_pull { kPORT_PullDisable = 0U, kPORT_PullDown = 2U, kPORT_PullUp = 3U }
	Internal resistor pull feature selection. More...

enum	_port_slew_rate { kPORT_FastSlewRate = 0U, kPORT_SlowSlewRate = 1U }
	Slew rate selection. More...

enum	_port_passive_filter_enable { kPORT_PassiveFilterDisable = 0U, kPORT_PassiveFilterEnable = 1U }
	Passive filter feature enable/disable. More...

enum	_port_drive_strength { kPORT_LowDriveStrength = 0U, kPORT_HighDriveStrength = 1U }
	Configures the drive strength. More...

enum	port_mux_t { kPORT_PinDisabledOrAnalog = 0U, kPORT_MuxAsGpio = 1U, kPORT_MuxAlt2 = 2U, kPORT_MuxAlt3 = 3U, kPORT_MuxAlt4 = 4U, kPORT_MuxAlt5 = 5U, kPORT_MuxAlt6 = 6U, kPORT_MuxAlt7 = 7U, kPORT_MuxAlt8 = 8U, kPORT_MuxAlt9 = 9U, kPORT_MuxAlt10 = 10U, kPORT_MuxAlt11 = 11U, kPORT_MuxAlt12 = 12U, kPORT_MuxAlt13 = 13U, kPORT_MuxAlt14 = 14U, kPORT_MuxAlt15 = 15U }
	Pin mux selection. More...

enum	port_interrupt_t { kPORT_InterruptOrDMADisabled = 0x0U, kPORT_DMARisingEdge = 0x1U, kPORT_DMAFallingEdge = 0x2U, kPORT_DMAEitherEdge = 0x3U, kPORT_InterruptLogicZero = 0x8U, kPORT_InterruptRisingEdge = 0x9U, kPORT_InterruptFallingEdge = 0xAU, kPORT_InterruptEitherEdge = 0xBU, kPORT_InterruptLogicOne = 0xCU }
	Configures the interrupt generation condition. More...

Driver version
#define	FSL_PORT_DRIVER_VERSION (MAKE_VERSION(2, 0, 2))
	Version 2.0.2. More...

Configuration
static void	PORT_SetPinConfig (PORT_Type base, uint32_t pin, const port_pin_config_t config)
	Sets the port PCR register. More...

static void	PORT_SetMultiplePinsConfig (PORT_Type base, uint32_t mask, const port_pin_config_t config)
	Sets the port PCR register for multiple pins. More...

static void	PORT_SetPinMux (PORT_Type *base, uint32_t pin, port_mux_t mux)
	Configures the pin muxing. More...

Interrupt
static void	PORT_SetPinInterruptConfig (PORT_Type *base, uint32_t pin, port_interrupt_t config)
	Configures the port pin interrupt/DMA request. More...

static uint32_t	PORT_GetPinsInterruptFlags (PORT_Type *base)
	Reads the whole port status flag. More...

static void	PORT_ClearPinsInterruptFlags (PORT_Type *base, uint32_t mask)
	Clears the multiple pin interrupt status flag. More...

Data Structure Documentation

struct port_pin_config_t

Data Fields
uint16_t	pullSelect: 2
	No-pull/pull-down/pull-up select.

uint16_t	slewRate: 1
	Fast/slow slew rate Configure.

uint16_t	passiveFilterEnable: 1
	Passive filter enable/disable.

uint16_t	driveStrength: 1
	Fast/slow drive strength configure.

uint16_t	mux: 3
	Pin mux Configure.

Macro Definition Documentation

#define FSL_PORT_DRIVER_VERSION (MAKE_VERSION(2, 0, 2))

Enumeration Type Documentation

enum _port_pull

Enumerator
kPORT_PullDisable	Internal pull-up/down resistor is disabled.
kPORT_PullDown	Internal pull-down resistor is enabled.
kPORT_PullUp	Internal pull-up resistor is enabled.

enum _port_slew_rate

Enumerator
kPORT_FastSlewRate	Fast slew rate is configured.
kPORT_SlowSlewRate	Slow slew rate is configured.

enum _port_passive_filter_enable

Enumerator
kPORT_PassiveFilterDisable	Passive input filter is disabled.
kPORT_PassiveFilterEnable	Passive input filter is enabled.

enum _port_drive_strength

Enumerator
kPORT_LowDriveStrength	Low-drive strength is configured.
kPORT_HighDriveStrength	High-drive strength is configured.

enum port_mux_t

Enumerator
kPORT_PinDisabledOrAnalog	Corresponding pin is disabled, but is used as an analog pin.
kPORT_MuxAsGpio	Corresponding pin is configured as GPIO.
kPORT_MuxAlt2	Chip-specific.
kPORT_MuxAlt3	Chip-specific.
kPORT_MuxAlt4	Chip-specific.
kPORT_MuxAlt5	Chip-specific.
kPORT_MuxAlt6	Chip-specific.
kPORT_MuxAlt7	Chip-specific.
kPORT_MuxAlt8	Chip-specific.
kPORT_MuxAlt9	Chip-specific.
kPORT_MuxAlt10	Chip-specific.
kPORT_MuxAlt11	Chip-specific.
kPORT_MuxAlt12	Chip-specific.
kPORT_MuxAlt13	Chip-specific.
kPORT_MuxAlt14	Chip-specific.
kPORT_MuxAlt15	Chip-specific.

enum port_interrupt_t

Enumerator
kPORT_InterruptOrDMADisabled	Interrupt/DMA request is disabled.
kPORT_DMARisingEdge	DMA request on rising edge.
kPORT_DMAFallingEdge	DMA request on falling edge.
kPORT_DMAEitherEdge	DMA request on either edge.
kPORT_InterruptLogicZero	Interrupt when logic zero.
kPORT_InterruptRisingEdge	Interrupt on rising edge.
kPORT_InterruptFallingEdge	Interrupt on falling edge.
kPORT_InterruptEitherEdge	Interrupt on either edge.
kPORT_InterruptLogicOne	Interrupt when logic one.

Function Documentation

static void PORT_SetPinConfig	(	PORT_Type *	base,
		uint32_t	pin,
		const port_pin_config_t *	config
	)

inlinestatic

This is an example to define an input pin or output pin PCR configuration.

* // Define a digital input pin PCR configuration
* port_pin_config_t config = {
*      kPORT_PullUp,
*      kPORT_FastSlewRate,
*      kPORT_PassiveFilterDisable,
*      kPORT_OpenDrainDisable,
*      kPORT_LowDriveStrength,
*      kPORT_MuxAsGpio,
*      kPORT_UnLockRegister,
* };
* 

Parameters

base	PORT peripheral base pointer.
pin	PORT pin number.
config	PORT PCR register configuration structure.

static void PORT_SetMultiplePinsConfig	(	PORT_Type *	base,
		uint32_t	mask,
		const port_pin_config_t *	config
	)

inlinestatic

This is an example to define input pins or output pins PCR configuration.

* // Define a digital input pin PCR configuration
* port_pin_config_t config = {
*      kPORT_PullUp ,
*      kPORT_PullEnable,
*      kPORT_FastSlewRate,
*      kPORT_PassiveFilterDisable,
*      kPORT_OpenDrainDisable,
*      kPORT_LowDriveStrength,
*      kPORT_MuxAsGpio,
*      kPORT_UnlockRegister,
* };
* 

Parameters

base	PORT peripheral base pointer.
mask	PORT pin number macro.
config	PORT PCR register configuration structure.

static void PORT_SetPinMux	(	PORT_Type *	base,
		uint32_t	pin,
		port_mux_t	mux
	)

inlinestatic

Parameters

base	PORT peripheral base pointer.
pin	PORT pin number.
mux	pin muxing slot selection. kPORT_PinDisabledOrAnalog: Pin disabled or work in analog function. kPORT_MuxAsGpio : Set as GPIO. kPORT_MuxAlt2 : chip-specific. kPORT_MuxAlt3 : chip-specific. kPORT_MuxAlt4 : chip-specific. kPORT_MuxAlt5 : chip-specific. kPORT_MuxAlt6 : chip-specific. kPORT_MuxAlt7 : chip-specific. : This function is NOT recommended to use together with the PORT_SetPinsConfig, because the PORT_SetPinsConfig need to configure the pin mux anyway (Otherwise the pin mux is reset to zero : kPORT_PinDisabledOrAnalog). This function is recommended to use to reset the pin mux

static void PORT_SetPinInterruptConfig	(	PORT_Type *	base,
		uint32_t	pin,
		port_interrupt_t	config
	)

inlinestatic

Parameters

base	PORT peripheral base pointer.
pin	PORT pin number.
config	PORT pin interrupt configuration. kPORT_InterruptOrDMADisabled: Interrupt/DMA request disabled. kPORT_DMARisingEdge : DMA request on rising edge(if the DMA requests exit). kPORT_DMAFallingEdge: DMA request on falling edge(if the DMA requests exit). kPORT_DMAEitherEdge : DMA request on either edge(if the DMA requests exit). #kPORT_FlagRisingEdge : Flag sets on rising edge(if the Flag states exit). #kPORT_FlagFallingEdge : Flag sets on falling edge(if the Flag states exit). #kPORT_FlagEitherEdge : Flag sets on either edge(if the Flag states exit). kPORT_InterruptLogicZero : Interrupt when logic zero. kPORT_InterruptRisingEdge : Interrupt on rising edge. kPORT_InterruptFallingEdge: Interrupt on falling edge. kPORT_InterruptEitherEdge : Interrupt on either edge. kPORT_InterruptLogicOne : Interrupt when logic one. #kPORT_ActiveHighTriggerOutputEnable : Enable active high-trigger output (if the trigger states exit). #kPORT_ActiveLowTriggerOutputEnable : Enable active low-trigger output (if the trigger states exit).

static uint32_t PORT_GetPinsInterruptFlags ( PORT_Type * base )

inlinestatic

If a pin is configured to generate the DMA request, the corresponding flag is cleared automatically at the completion of the requested DMA transfer. Otherwise, the flag remains set until a logic one is written to that flag. If configured for a level sensitive interrupt that remains asserted, the flag is set again immediately.

Parameters

base	PORT peripheral base pointer.

Returns: Current port interrupt status flags, for example, 0x00010001 means the pin 0 and 16 have the interrupt.

static void PORT_ClearPinsInterruptFlags	(	PORT_Type *	base,
		uint32_t	mask
	)

inlinestatic

Parameters

base	PORT peripheral base pointer.
mask	PORT pin number macro.

Overview

Typical configuration use case

Input PORT configuration

I2C PORT Configuration

Data Structures

Enumerations

Driver version

Configuration

Interrupt

Data Structure Documentation

Data Fields

Macro Definition Documentation

Enumeration Type Documentation

Function Documentation