See Quick start guide for the common IOPORT service.

This is common IOPORT service for GPIO pin configuration and control in a standardized manner across the MEGA, MEGA_RF, XMEGA, UC3 and ARM devices.

Port pin control code is optimized for each platform, and should produce both compact and fast execution times when used with constant values.

Dependencies

This driver depends on the following modules:

System Clock Management for clock speed and functions.

IOPORT Modes

For details on these please see the SAM Manual.

Macros
#define	IOPORT_CREATE_PIN(port, pin) ((IOPORT_ ## port) * 32 + (pin))
	Create IOPORT pin number. More...

Enumerations
enum	ioport_direction { IOPORT_DIR_INPUT, IOPORT_DIR_OUTPUT }
	IOPORT pin directions. More...

enum	ioport_sense { IOPORT_SENSE_BOTHEDGES, IOPORT_SENSE_RISING, IOPORT_SENSE_FALLING }

enum	ioport_value { IOPORT_PIN_LEVEL_LOW, IOPORT_PIN_LEVEL_HIGH }
	IOPORT levels. More...

Functions
static void	ioport_disable_pin (ioport_pin_t pin)
	Disable IOPORT pin, based on a pin created with IOPORT_CREATE_PIN(). More...

static void	ioport_disable_port (ioport_port_t port, ioport_port_mask_t mask)
	Disable multiple pins in a single IOPORT port. More...

static void	ioport_enable_pin (ioport_pin_t pin)
	Enable an IOPORT pin, based on a pin created with IOPORT_CREATE_PIN(). More...

static void	ioport_enable_port (ioport_port_t port, ioport_port_mask_t mask)
	Enable multiple pins in a single IOPORT port. More...

static bool	ioport_get_pin_level (ioport_pin_t pin)
	Get current value of an IOPORT pin, which has been configured as an input. More...

static ioport_port_mask_t	ioport_get_port_level (ioport_pin_t port, ioport_port_mask_t mask)
	Get current value of several IOPORT pins in a single port, which have been configured as an inputs. More...

static void	ioport_init (void)
	Initializes the IOPORT service, ready for use. More...

static ioport_port_mask_t	ioport_pin_to_mask (ioport_pin_t pin)
	Convert a pin ID into a bitmask mask for the given pin on its port. More...

static ioport_port_t	ioport_pin_to_port_id (ioport_pin_t pin)
	Convert a pin ID into a its port ID. More...

static void	ioport_reset_pin_mode (ioport_pin_t pin)
	Reset pin mode configuration for a single IOPORT pin. More...

static void	ioport_reset_port_mode (ioport_port_t port, ioport_port_mask_t mask)
	Reset multiple pin modes in a specified IOPORT port to defaults. More...

static void	ioport_set_pin_dir (ioport_pin_t pin, enum ioport_direction dir)
	Set direction for a single IOPORT pin. More...

static void	ioport_set_pin_level (ioport_pin_t pin, bool level)
	Set an IOPORT pin to a specified logical value. More...

static void	ioport_set_pin_mode (ioport_pin_t pin, ioport_mode_t mode)
	Set pin mode for one single IOPORT pin. More...

static void	ioport_set_pin_sense_mode (ioport_pin_t pin, enum ioport_sense pin_sense)
	Set the pin sense mode of a single IOPORT pin. More...

static void	ioport_set_port_dir (ioport_port_t port, ioport_port_mask_t mask, enum ioport_direction dir)
	Set I/O direction for a group of pins in a single IOPORT. More...

static void	ioport_set_port_level (ioport_port_t port, ioport_port_mask_t mask, enum ioport_value level)
	Set a group of IOPORT pins in a single port to a specified logical value. More...

static void	ioport_set_port_mode (ioport_port_t port, ioport_port_mask_t mask, ioport_mode_t mode)
	Set multiple pin modes in a single IOPORT port, such as pull-up, pull-down, etc. More...

static void	ioport_set_port_sense_mode (ioport_port_t port, ioport_port_mask_t mask, enum ioport_sense pin_sense)
	Set the pin sense mode of a multiple IOPORT pins on a single port. More...

static void	ioport_toggle_pin_level (ioport_pin_t pin)
	Toggle the value of an IOPORT pin, which has previously configured as an output. More...

static void	ioport_toggle_port_level (ioport_port_t port, ioport_port_mask_t mask)
	Toggle the values of several IOPORT pins located in a single port. More...

IOPORT Mode bit definitions
#define	IOPORT_MODE_MUX_MASK (0x7 << 0)

#define	IOPORT_MODE_MUX_BIT0 ( 1 << 0)

#define	IOPORT_MODE_MUX_BIT1 ( 1 << 1)

#define	IOPORT_MODE_MUX_A ( 0 << 0)

#define	IOPORT_MODE_MUX_B ( 1 << 0)

#define	IOPORT_MODE_MUX_C ( 2 << 0)

#define	IOPORT_MODE_MUX_D ( 3 << 0)

#define	IOPORT_MODE_PULLUP ( 1 << 3)

#define	IOPORT_MODE_PULLDOWN ( 1 << 4)

#define	IOPORT_MODE_OPEN_DRAIN ( 1 << 5)

#define	IOPORT_MODE_GLITCH_FILTER ( 1 << 6)

#define	IOPORT_MODE_DEBOUNCE ( 1 << 7)

#define IOPORT_CREATE_PIN	(	port,
		pin
	)	((IOPORT_ ## port) * 32 + (pin))

Create IOPORT pin number.

Create a IOPORT pin number for use with the IOPORT functions.

Parameters

port	IOPORT port (e.g. PORTA, PA or PIOA depending on chosen architecture)
pin	IOPORT zero-based index of the I/O pin

#define IOPORT_MODE_DEBOUNCE ( 1 << 7)

Input debounce

Referenced by arch_ioport_set_port_mode().

#define IOPORT_MODE_GLITCH_FILTER ( 1 << 6)

Glitch filter

Referenced by arch_ioport_set_port_mode().

#define IOPORT_MODE_MUX_A ( 0 << 0)

MUX function A

#define IOPORT_MODE_MUX_B ( 1 << 0)

MUX function B

#define IOPORT_MODE_MUX_BIT0 ( 1 << 0)

MUX BIT0 mask

Referenced by arch_ioport_set_port_mode().

#define IOPORT_MODE_MUX_BIT1 ( 1 << 1)

MUX BIT1 mask

Referenced by arch_ioport_set_port_mode().

#define IOPORT_MODE_MUX_C ( 2 << 0)

MUX function C

#define IOPORT_MODE_MUX_D ( 3 << 0)

MUX function D

#define IOPORT_MODE_MUX_MASK (0x7 << 0)

MUX bits mask

#define IOPORT_MODE_OPEN_DRAIN ( 1 << 5)

Open drain

Referenced by arch_ioport_set_port_mode().

#define IOPORT_MODE_PULLDOWN ( 1 << 4)

Pull-down

Referenced by arch_ioport_set_port_mode().

#define IOPORT_MODE_PULLUP ( 1 << 3)

Pull-up

Referenced by arch_ioport_set_port_mode().

enum ioport_direction

IOPORT pin directions.

Enumerator
IOPORT_DIR_INPUT	IOPORT input direction
IOPORT_DIR_OUTPUT	IOPORT output direction

enum ioport_sense

Enumerator
IOPORT_SENSE_BOTHEDGES	IOPORT sense both rising and falling edges
IOPORT_SENSE_RISING	IOPORT sense rising edges
IOPORT_SENSE_FALLING	IOPORT sense falling edges

enum ioport_value

IOPORT levels.

Enumerator
IOPORT_PIN_LEVEL_LOW	IOPORT pin value low
IOPORT_PIN_LEVEL_HIGH	IOPORT pin value high

static void ioport_disable_pin ( ioport_pin_t pin )

inlinestatic

Disable IOPORT pin, based on a pin created with IOPORT_CREATE_PIN().

Parameters

pin	IOPORT pin to disable

References arch_ioport_disable_pin().

Referenced by main().

static void ioport_disable_port	(	ioport_port_t	port,
		ioport_port_mask_t	mask
	)

inlinestatic

Disable multiple pins in a single IOPORT port.

Parameters

port	IOPORT port to disable
mask	Pin mask of pins to disable

References arch_ioport_disable_port().

static void ioport_enable_pin ( ioport_pin_t pin )

inlinestatic

Enable an IOPORT pin, based on a pin created with IOPORT_CREATE_PIN().

Parameters

pin	IOPORT pin to enable

References arch_ioport_enable_pin().

static void ioport_enable_port	(	ioport_port_t	port,
		ioport_port_mask_t	mask
	)

inlinestatic

Enable multiple pins in a single IOPORT port.

Parameters

port	IOPORT port to enable
mask	Mask of pins within the port to enable

References arch_ioport_enable_port().

static bool ioport_get_pin_level ( ioport_pin_t pin )

inlinestatic

Get current value of an IOPORT pin, which has been configured as an input.

Parameters

pin	IOPORT pin to read

Returns: Current logical value of the specified pin

References arch_ioport_get_pin_level().

static ioport_port_mask_t ioport_get_port_level	(	ioport_pin_t	port,
		ioport_port_mask_t	mask
	)

inlinestatic

Get current value of several IOPORT pins in a single port, which have been configured as an inputs.

Parameters

port	IOPORT port to read
mask	Pin mask of pins to read

Returns: Logical levels of the specified pins from the read port, returned as a mask.

References arch_ioport_get_port_level().

static void ioport_init ( void )

inlinestatic

Initializes the IOPORT service, ready for use.

This function must be called before using any other functions in the IOPORT service.

References arch_ioport_init().

Referenced by board_init().

static ioport_port_mask_t ioport_pin_to_mask ( ioport_pin_t pin )

inlinestatic

Convert a pin ID into a bitmask mask for the given pin on its port.

Parameters

pin	IOPORT pin ID to convert

Return values

Bitmask with a bit set that corresponds to the given pin ID in its port

References arch_ioport_pin_to_mask().

static ioport_port_t ioport_pin_to_port_id ( ioport_pin_t pin )

inlinestatic

Convert a pin ID into a its port ID.

Parameters

pin	IOPORT pin ID to convert

Return values

Port	ID for the given pin ID

References arch_ioport_pin_to_port_id().

static void ioport_reset_pin_mode ( ioport_pin_t pin )

inlinestatic

Reset pin mode configuration for a single IOPORT pin.

Parameters

pin	IOPORT pin to configure

References arch_ioport_set_pin_mode().

static void ioport_reset_port_mode	(	ioport_port_t	port,
		ioport_port_mask_t	mask
	)

inlinestatic

Reset multiple pin modes in a specified IOPORT port to defaults.

Parameters

port	IOPORT port to configure
mask	Mask of pins whose mode configuration is to be reset

References arch_ioport_set_port_mode().

static void ioport_set_pin_dir	(	ioport_pin_t	pin,
		enum ioport_direction	dir
	)

inlinestatic

Set direction for a single IOPORT pin.

Parameters

pin	IOPORT pin to configure
dir	Direction to set for the specified pin (ioport_direction)

References arch_ioport_set_pin_dir().

Referenced by board_init().

static void ioport_set_pin_level	(	ioport_pin_t	pin,
		bool	level
	)

inlinestatic

Set an IOPORT pin to a specified logical value.

Parameters

pin	IOPORT pin to configure
level	Logical value of the pin

References arch_ioport_set_pin_level().

Referenced by board_init().

static void ioport_set_pin_mode	(	ioport_pin_t	pin,
		ioport_mode_t	mode
	)

inlinestatic

Set pin mode for one single IOPORT pin.

Parameters

pin	IOPORT pin to configure
mode	Mode masks to configure for the specified pin (IOPORT Modes)

References arch_ioport_set_pin_mode().

Referenced by board_init(), and main().

static void ioport_set_pin_sense_mode	(	ioport_pin_t	pin,
		enum ioport_sense	pin_sense
	)

inlinestatic

Set the pin sense mode of a single IOPORT pin.

Parameters

pin	IOPORT pin to configure
pin_sense	Edge to sense for the pin (ioport_sense)

References arch_ioport_set_pin_sense_mode().

static void ioport_set_port_dir	(	ioport_port_t	port,
		ioport_port_mask_t	mask,
		enum ioport_direction	dir
	)

inlinestatic

Set I/O direction for a group of pins in a single IOPORT.

Parameters

port	IOPORT port to configure
mask	Pin mask of pins to configure
dir	Direction to set for the specified pins (ioport_direction)

References arch_ioport_set_port_dir().

static void ioport_set_port_level	(	ioport_port_t	port,
		ioport_port_mask_t	mask,
		enum ioport_value	level
	)

inlinestatic

Set a group of IOPORT pins in a single port to a specified logical value.

Parameters

port	IOPORT port to write to
mask	Pin mask of pins to modify
level	Level of the pins to be modified

References arch_ioport_set_port_level().

static void ioport_set_port_mode	(	ioport_port_t	port,
		ioport_port_mask_t	mask,
		ioport_mode_t	mode
	)

inlinestatic

Set multiple pin modes in a single IOPORT port, such as pull-up, pull-down, etc.

configuration.

Parameters

port	IOPORT port to configure
mask	Pin mask of pins to configure
mode	Mode masks to configure for the specified pins (IOPORT Modes)

References arch_ioport_set_port_mode().

static void ioport_set_port_sense_mode	(	ioport_port_t	port,
		ioport_port_mask_t	mask,
		enum ioport_sense	pin_sense
	)

inlinestatic

Set the pin sense mode of a multiple IOPORT pins on a single port.

Parameters

port	IOPORT port to configure
mask	Bitmask if pins whose edge sense is to be configured
pin_sense	Edge to sense for the pins (ioport_sense)

References arch_ioport_set_port_sense_mode().

static void ioport_toggle_pin_level ( ioport_pin_t pin )

inlinestatic

Toggle the value of an IOPORT pin, which has previously configured as an output.

Parameters

pin	IOPORT pin to toggle

References arch_ioport_toggle_pin_level().

static void ioport_toggle_port_level	(	ioport_port_t	port,
		ioport_port_mask_t	mask
	)

inlinestatic

Toggle the values of several IOPORT pins located in a single port.

Parameters

port	IOPORT port to modify
mask	Pin mask of pins to toggle

References arch_ioport_toggle_port_level().

Microchip® Advanced Software Framework

Dependencies

IOPORT Modes

Macros

Enumerations

Functions

IOPORT Mode bit definitions