gpio_reg.h File Reference

Cortex-M4 GPIO register definitions and access macros. More...

#include "utils/types.h"
#include <stdint.h>

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Classes
struct	GPIOx_Typedef
	GPIO port register structure. More...

Macros
#define	GPIOA_BASE_ADDR   0x40020000
#define	GPIOB_BASE_ADDR   0x40020400
#define	GPIOC_BASE_ADDR   0x40020800
#define	GPIOD_BASE_ADDR   0x40020C00
#define	GPIOE_BASE_ADDR   0x40021000
#define	GPIOH_BASE_ADDR   0x40021C00
#define	GPIO_GET_PORT_NUMBER(n)
#define	GPIO_GET_PORT(n)
#define	GPIO_GET_PIN(n)

Detailed Description

Cortex-M4 GPIO register definitions and access macros.

This header defines the GPIO register structure and macros to access GPIO ports and pins on Cortex-M4 microcontrollers.

Structures:

• GPIOx_Typedef : Represents the memory-mapped GPIO registers for a port.

Macros:

• GPIOA_BASE_ADDR to GPIOH_BASE_ADDR : Base addresses of GPIO ports.
• GPIO_GET_PORT_NUMBER(n) : Compute the port number from a pin number.
• GPIO_GET_PORT(n) : Get a pointer to the GPIO port structure.
• GPIO_GET_PIN(n) : Get the pin number within a port.

Copyright

© NAVROBOTEC PVT. LTD.

Macro Definition Documentation

GPIO_GET_PIN

#define GPIO_GET_PIN

(

n

)

Value:

(n % 16)

Get pin number within the port from absolute pin number

GPIO_GET_PORT

#define GPIO_GET_PORT

(

n

)

Value:

  ((GPIOx_Typedef *)(GPIOA_BASE_ADDR + ((GPIO_GET_PORT_NUMBER(n)) * 0x400)))

Get pointer to GPIO port structure from absolute pin number

GPIO_GET_PORT_NUMBER

#define GPIO_GET_PORT_NUMBER

(

n

)

Value:

(n / 16 == 5 ? 7 : n / 16)

Get port number from absolute pin number

GPIOA_BASE_ADDR

#define GPIOA_BASE_ADDR   0x40020000

Base addresses for GPIO ports GPIOA base address

GPIOB_BASE_ADDR

#define GPIOB_BASE_ADDR   0x40020400

GPIOB base address

GPIOC_BASE_ADDR

#define GPIOC_BASE_ADDR   0x40020800

GPIOC base address

GPIOD_BASE_ADDR

#define GPIOD_BASE_ADDR   0x40020C00

GPIOD base address

GPIOE_BASE_ADDR

#define GPIOE_BASE_ADDR   0x40021000

GPIOE base address

GPIOH_BASE_ADDR

#define GPIOH_BASE_ADDR   0x40021C00

GPIOH base address