cpu_gpio.h File Reference

GPIO CPU definitions for the STM32 family. More...

Detailed Description

GPIO CPU definitions for the STM32 family.

Author

Hauke Petersen hauke.nosp@m..pet.nosp@m.ersen.nosp@m.@fu-.nosp@m.berli.nosp@m.n.de

Vincent Dupont vince.nosp@m.nt@o.nosp@m.takey.nosp@m.s.co.nosp@m.m

Definition in file cpu_gpio.h.

#include <stdint.h>
#include "cpu.h"

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Go to the source code of this file.

#define	GPIO_UNDEF   (0xffffffff)
	Definition of a fitting UNDEF value.
#define	GPIO_PIN(x, y)   ((GPIOA_BASE + (x << 10)) | y)
	Define a CPU specific GPIO pin generator macro.
#define	GPIO_MODE(io, pr, ot)   ((io << 0) | (pr << 2) | (ot << 4))
	Generate GPIO mode bitfields. More...
enum
	Available GPIO ports.
enum	gpio_af_t {   GPIO_AF_OUT_PP = 0xb , GPIO_AF_OUT_OD = 0xf , GPIO_AF0 = 0 , GPIO_AF1 ,   GPIO_AF2 , GPIO_AF3 , GPIO_AF4 , GPIO_AF5 ,   GPIO_AF6 , GPIO_AF7 , GPIO_AF8 , GPIO_AF9 ,   GPIO_AF10 , GPIO_AF11 , GPIO_AF12 , GPIO_AF13 ,   GPIO_AF14 , GPIO_AF15 , GPIO_AF_UNDEF }
	Available MUX values for configuring a pin's alternate function. More...
void	gpio_init_af (gpio_t pin, gpio_af_t af)
	Configure the alternate function for the given pin. More...
void	gpio_init_analog (gpio_t pin)
	Configure the given pin to be used as ADC input. More...

Macro Definition Documentation

GPIO_MODE

#define GPIO_MODE	(		io,
			pr,
			ot
	)		((io << 0) | (pr << 2) | (ot << 4))

Generate GPIO mode bitfields.

We use 5 bit to encode the mode:

• bit 0+1: pin mode (input / output)
• bit 2+3: pull resistor configuration
• bit 4: output type (0: push-pull, 1: open-drain)

Definition at line 172 of file cpu_gpio.h.

Enumeration Type Documentation

gpio_af_t

enum gpio_af_t

Available MUX values for configuring a pin's alternate function.

Enumerator
GPIO_AF_OUT_PP	alternate function output - push-pull
GPIO_AF_OUT_OD	alternate function output - open-drain
GPIO_AF0	use alternate function 0
GPIO_AF1	use alternate function 1
GPIO_AF2	use alternate function 2
GPIO_AF3	use alternate function 3
GPIO_AF4	use alternate function 4
GPIO_AF5	use alternate function 5
GPIO_AF6	use alternate function 6
GPIO_AF7	use alternate function 7
GPIO_AF8	use alternate function 8
GPIO_AF9	use alternate function 9
GPIO_AF10	use alternate function 10
GPIO_AF11	use alternate function 11
GPIO_AF12	use alternate function 12
GPIO_AF13	use alternate function 13
GPIO_AF14	use alternate function 14
GPIO_AF15	use alternate function 15
GPIO_AF_UNDEF	an UNDEF value definition, e.g. for register based spi

Definition at line 93 of file cpu_gpio.h.

Function Documentation

gpio_init_af()

void gpio_init_af	(	gpio_t	pin,
		gpio_af_t	af
	)

Configure the alternate function for the given pin.

Parameters

[in]	pin	pin to configure
[in]	af	alternate function to use

gpio_init_analog()

void gpio_init_analog

(

gpio_t

pin

)

Configure the given pin to be used as ADC input.

Parameters

[in]

pin

pin to configure