Collaboration diagram for GPIO (General Purpose I/O):

Modules
	GPIO Interrupts

Data Structures
struct	gpio_t
	GPIO control structure. More...

Macros
#define	GPIO_NC
	Unconnected pin.

#define	DEF_GPIOA(__PIN, __MODE)
	Helper for defining a pin. More...

#define	DEF_GPIOB(__PIN, __MODE)
	same as DEF_GPIOA for port B

#define	DEF_GPIOC(__PIN, __MODE)
	same as DEF_GPIOA for port C

#define	DEF_GPIOD(__PIN, __MODE)
	same as DEF_GPIOA for port D

#define	DEF_GPIOE(__PIN, __MODE)
	same as DEF_GPIOA for port E

#define	DEF_GPIOF(__PIN, __MODE)
	same as DEF_GPIOA for port F

#define	DEF_GPIOG(__PIN, __MODE)
	same as DEF_GPIOA for port G

#define	DEF_GPIOH(__PIN, __MODE)
	same as DEF_GPIOA for port H

#define	DEF_GPIOI(__PIN, __MODE)
	same as DEF_GPIOA for port I

Enumerations
enum	gpio_mode_e { GPIO_INPUT, GPIO_OUTPUT, GPIO_OUTPUT_0, GPIO_OUTPUT_1, GPIO_AF, GPIO_AN, GPIO_PP, GPIO_OD, GPIO_SPEED_2, GPIO_SPEED_25, GPIO_SPEED_50, GPIO_SPEED_100, GPIO_NOPULL, GPIO_PULLUP, GPIO_PULLDOWN }
	GPIO modes, can be ORed. More...

Functions
status_e	gpio_setup (const struct gpio_t *gpio)
	Setup a gpio. More...

status_e	gpio_setup_list (const struct gpio_t gpio[], size_t len)
	Setup an array of gpio. More...

static GPIO_TypeDef *	_internal_gpio_get_ctrl (const struct gpio_t *gpio)
	Get the gpio controller given the gpio struct.

static void	gpio_toggle (const struct gpio_t *gpio)
	Toggle a gpio line. More...

static uint32_t	gpio_get (const struct gpio_t *gpio)
	Get gpio level. More...

static uint32_t	gpio_get_internal (const struct gpio_t *gpio)
	Get gpio internal level. More...

static void	gpio_set (const struct gpio_t *gpio, uint32_t value)
	Set a gpio. More...

static void	gpio_set_direction (const struct gpio_t *gpio, enum gpio_mode_e dir)
	Set a gpio direction. More...

Detailed Description

Macro Definition Documentation

#define DEF_GPIOA	(	__PIN,
		__MODE
	)

Helper for defining a pin.

Parameters

__PIN	the pin number (0 for GPIOx0, ..., 3 for GPIOx3, ...)
__MODE	gpio_mode_e of the pin

Example for one pin:

#include "heivs/stm32_gpio.h"
const gpio_t test_pin = DEF_GPIOA(3, GPIO_INPUT | GPIO_PULLUP);

Example for multiple pins:

#include "heivs/stm32_gpio.h"
const gpio_t test_pins[] =
{
  DEF_GPIOA(7, GPIO_INPUT | GPIO_PULLUP),
  DEF_GPIOH(3, GPIO_OUTPUT_0 | GPIO_OD | GPIO_SPEED_2),
  DEF_GPIOD(1, GPIO_INPUT | GPIO_PULLUP)
};

Definition at line 358 of file stm32_gpio.h.

Enumeration Type Documentation

enum gpio_mode_e

GPIO modes, can be ORed.

Enumerator
GPIO_INPUT	Input.
GPIO_OUTPUT	Output (same as GPIO_OUTPUT_0)
GPIO_OUTPUT_0	Output (default 0)
GPIO_OUTPUT_1	Output (default 1)
GPIO_AF	Alternate function.
GPIO_AN	Analog.
GPIO_PP	Output type : Push-Pull.
GPIO_OD	Output type : Open Drain.
GPIO_SPEED_2	Output speed : 2 MHz.
GPIO_SPEED_25	Output speed : 25 MHz.
GPIO_SPEED_50	Output speed : 50 MHz.
GPIO_SPEED_100	Output speed : 100 MHz.
GPIO_NOPULL	No pull up or down.
GPIO_PULLUP	Pull up.
GPIO_PULLDOWN	pull down

Definition at line 41 of file stm32_gpio.h.

Function Documentation

status_e gpio_setup ( const struct gpio_t * gpio )

Setup a gpio.

Parameters

gpio	Pointer on the gpio

Returns: NO_ERROR for no problem

Example configuring GPIOA3 as input with pullup:

#include "heivs/stm32_gpio.h"
void do_something(void)
{
  const gpio_t test_pin = DEF_GPIOA(3, GPIO_INPUT | GPIO_PULLUP);
  gpio_setup(&test_pin);
}

Definition at line 9 of file stm32_gpio.c.

References _internal_gpio_get_ctrl(), GPIO_TypeDef::AFR, gpio_t::ctrl, gpio_set(), gpio_t::mode, GPIO_TypeDef::MODER, NO_ERROR, gpio_t::nr, GPIO_TypeDef::OSPEEDR, GPIO_TypeDef::OTYPER, and GPIO_TypeDef::PUPDR.

Referenced by bsp_init(), camera_init(), gpio_irq_setup(), gpio_setup_list(), and workaround_reset_i2c_devices().

Here is the call graph for this function:

Here is the caller graph for this function:

status_e gpio_setup_list	(	const struct gpio_t	gpio[],
		size_t	len
	)

Setup an array of gpio.

Parameters

gpio	Pointer on the first gpio
len	The number of gpios

Returns: NO_ERROR for no problem

#include "heivs/stm32_gpio.h"
void do_something(void)
{
  const gpio_t test_pins[] =
  {
    DEF_GPIOA(7, GPIO_INPUT | GPIO_PULLUP),
    DEF_GPIOH(3, GPIO_OUTPUT_0 | GPIO_OD | GPIO_SPEED_2),
    DEF_GPIOD(1, GPIO_INPUT | GPIO_PULLUP)
  };
  gpio_setup_list(test_pins, ARRAY_SIZE(test_pins));
}