gpio_arch.h File Reference

GPIO helper functions for STM32F1 and STM32F4. More...

#include <libopencm3/stm32/gpio.h>

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Go to the source code of this file.

Typedefs
typedef uint32_t	gpio_port_t
	Abstract gpio port type for hardware independent part. More...

Functions
void	gpio_setup_output (uint32_t port, uint16_t gpios)
	Setup one or more pins of the given GPIO port as outputs. More...
void	gpio_setup_input (uint32_t port, uint16_t gpios)
	Setup one or more pins of the given GPIO port as inputs. More...
void	gpio_setup_input_pullup (uint32_t port, uint16_t gpios)
	Setup one or more pins of the given GPIO port as inputs with pull up resistor enabled. More...
void	gpio_setup_input_pulldown (uint32_t port, uint16_t gpios)
	Setup one or more pins of the given GPIO port as inputs with pull down resistors enabled. More...
void	gpio_setup_pin_af (uint32_t port, uint16_t pin, uint8_t af, bool is_output)
	Setup a gpio for input or output with alternate function. More...
void	gpio_setup_pin_analog (uint32_t port, uint16_t pin)
	Setup a gpio for analog use. More...
void	gpio_enable_clock (uint32_t port)
	Enable the relevant clock. More...

Detailed Description

GPIO helper functions for STM32F1 and STM32F4.

The gpio_set and gpio_clear functions are already available from libopencm3.

Definition in file gpio_arch.h.

Typedef Documentation

gpio_port_t

typedef uint32_t gpio_port_t

Abstract gpio port type for hardware independent part.

Definition at line 39 of file gpio_arch.h.

Function Documentation

gpio_enable_clock()

void gpio_enable_clock

(

uint32_t

port

)

Enable the relevant clock.

This is an STM32 specific helper funtion and should only be used in stm32 arch code.

Definition at line 34 of file gpio_arch.c.

References GPIOA, GPIOB, GPIOC, GPIOD, GPIOE, GPIOF, GPIOG, and GPIOH.

Referenced by softi2c_setup_gpio().

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gpio_setup_input()

void gpio_setup_input	(	uint32_t	port,
		uint16_t	gpios
	)

Setup one or more pins of the given GPIO port as inputs.

Parameters

[in]	port
[in]	gpios	If multiple pins are to be changed, use logical OR '|' to separate them.

Definition at line 33 of file gpio_arch.c.

References dir, GPIO_DIRECTION, GPIO_INPUT, gpiofp, and gpio_direction::pin.

gpio_setup_input_pulldown()

void gpio_setup_input_pulldown	(	uint32_t	port,
		uint16_t	gpios
	)

Setup one or more pins of the given GPIO port as inputs with pull down resistors enabled.

Parameters

[in]	port
[in]	gpios	If multiple pins are to be changed, use logical OR '|' to separate them.

gpio_setup_input_pullup()

void gpio_setup_input_pullup	(	uint32_t	port,
		uint16_t	gpios
	)

Setup one or more pins of the given GPIO port as inputs with pull up resistor enabled.

Parameters

[in]	port
[in]	gpios	If multiple pins are to be changed, use logical OR '|' to separate them.

gpio_setup_output()

void gpio_setup_output	(	uint32_t	port,
		uint16_t	gpios
	)

Setup one or more pins of the given GPIO port as outputs.

Parameters

[in]	port
[in]	gpios	If multiple pins are to be changed, use logical OR '|' to separate them.

Definition at line 31 of file gpio_arch.c.

gpio_setup_pin_af()

void gpio_setup_pin_af	(	uint32_t	port,
		uint16_t	pin,
		uint8_t	af,
		bool	is_output
	)

Setup a gpio for input or output with alternate function.

This is an STM32 specific helper funtion and should only be used in stm32 arch code.

gpio_setup_pin_analog()

void gpio_setup_pin_analog	(	uint32_t	port,
		uint16_t	pin
	)

Setup a gpio for analog use.

This is an STM32 specific helper funtion and should only be used in stm32 arch code.