mira_gpio.h File Reference

MiraOS GPIO driver. More...

#include <stdint.h>

Go to the source code of this file.

Typedefs
typedef void(*	MiraGpioCallbackType) (uint8_t port, uint8_t pin)
	Type definition for callbacks invoked by the GPIO ISRs. More...

Enumerations
enum	MiraGpioInterruptType { MiraGpioIrqRisingEdge = 0, MiraGpioIrqFallingEdge = 1, MiraGpioIrqBothEdges = 2 }
	GPIO edge trigger. More...
enum	MiraGpioPorts { MiraGpioPortA = 0, MiraGpioPortB = 1, MiraGpioPortC = 2, MiraGpioPortD = 3 }
	GPIO ports.
enum	MiraGpioPinMode { MiraInputPin, MiraOutputPin }
	GPIO pin mode.
enum	MiraGpioPullMode { MiraPullUp = 1, MiraPullDown = 2, MiraNoPull = 0 }
	GPIO pin pullup/pulldown mode.

Functions
void	mira_gpio_init (MiraGpioPorts port, uint8_t pin, MiraGpioPinMode mode, MiraGpioPullMode pull_mode)
	Initialize a GPIO pin. More...
uint8_t	mira_gpio_read (MiraGpioPorts port, uint8_t pin)
	Read an input pin. More...
void	mira_gpio_set (MiraGpioPorts port, uint8_t pin)
	Set an output pin (logic high output). More...
void	mira_gpio_clear (MiraGpioPorts port, uint8_t pin)
	Clear an output pin (logic low output). More...
void	mira_gpio_setup_interrupt (MiraGpioPorts port, uint8_t pin, MiraGpioInterruptType irq_type, MiraGpioCallbackType callback)
	Configure an GPIO interrupt. More...
void	mira_gpio_enable_interrupt (MiraGpioPorts port, uint8_t pin)
	Enables an GPIO interrupt. More...
void	mira_gpio_disable_interrupt (MiraGpioPorts port, uint8_t pin)
	Disables an GPIO interrupt. More...

Detailed Description

MiraOS GPIO driver.

Author

LumenRadio AB

Date

5 March 2016 The MiraOS library provides functions for controlling the Mira radio module, sending/receiving messages, controlling peripherals, etc.

See also

http://docs.lumenrad.io/mira

Typedef Documentation

typedef void(* MiraGpioCallbackType) (uint8_t port, uint8_t pin)

Type definition for callbacks invoked by the GPIO ISRs.

This is the prototype of a function pointer passed to mira_gpio_setup_interrupt(). These callbacks are registered on a port/pin basis. When a GPIO port generates an interrupt, if a callback has been registered for the port/pin combination, the ISR will invoke it. The ISR will pass the port/pin as arguments in that call, so that a developer can re-use the same callback for multiple port/pin combinations

Parameters

port	The port that triggered the GPIO interrupt.
pin	The pin that triggered the interrupt

Returns

void

Enumeration Type Documentation

enum MiraGpioInterruptType

GPIO edge trigger.

Enumerator
MiraGpioIrqRisingEdge	Interrupt triggers on rising edge
MiraGpioIrqFallingEdge	Interrupt triggers on falling edge
MiraGpioIrqBothEdges	Interrupt triggers on both rising and falling edges

Function Documentation

void mira_gpio_clear	(	MiraGpioPorts	port,
		uint8_t	pin
	)

Clear an output pin (logic low output).

Parameters

port	The port where the pin is located (Port A, B, C)
pin	Pin number within the port

Returns

void

void mira_gpio_disable_interrupt	(	MiraGpioPorts	port,
		uint8_t	pin
	)

Disables an GPIO interrupt.

Parameters

port	The port where the pin is located (Port A, B, C)
pin	Pin number within the port

Returns

void

void mira_gpio_enable_interrupt	(	MiraGpioPorts	port,
		uint8_t	pin
	)

Enables an GPIO interrupt.

Parameters

port	The port where the pin is located (Port A, B, C)
pin	Pin number within the port

Returns

void

void mira_gpio_init	(	MiraGpioPorts	port,
		uint8_t	pin,
		MiraGpioPinMode	mode,
		MiraGpioPullMode	pull_mode
	)

Initialize a GPIO pin.

Parameters

port	The port where the pin is located (Port A, B, C)
pin	Pin number within the port
mode	Input or output
pull_mode	Pull-up/pull-down mode

Returns

void

uint8_t mira_gpio_read	(	MiraGpioPorts	port,
		uint8_t	pin
	)

Read an input pin.

Parameters

port	The port where the pin is located (Port A, B, C)
pin	Pin number within the port

Returns

logic level at input pin

void mira_gpio_set	(	MiraGpioPorts	port,
		uint8_t	pin
	)

Set an output pin (logic high output).

Parameters

port	The port where the pin is located (Port A, B, C)
pin	Pin number within the port

Returns

void

void mira_gpio_setup_interrupt	(	MiraGpioPorts	port,
		uint8_t	pin,
		MiraGpioInterruptType	irq_type,
		MiraGpioCallbackType	callback
	)

Configure an GPIO interrupt.

If both edges are used as trigger, this will not be able to wake up processor from deep sleep. Only rising or falling edges may be used as wake-up triggers.

Parameters

port	The port where the pin is located (Port A, B, C)
pin	Pin number within the port
irq_type	The interrupt type (falling, rising or both edges)
callback	The callback function that will be invoked by the ISR

Returns

void