sys-gpio-v3.c File Reference

#include <io.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <types.h>
#include <log.h>
#include <reg-ncat.h>
#include <sys-gpio.h>

Include dependency graph for sys-gpio-v3.c:

Enumerations
enum	{   GPIO_CFG0 = 0x80 , GPIO_CFG1 = 0x84 , GPIO_CFG2 = 0x88 , GPIO_CFG3 = 0x8c ,   GPIO_DAT = 0x90 , GPIO_DAT_SET = 0x94 , GPIO_DAT_CLR = 0x98 , GPIO_DRV0 = 0xa0 ,   GPIO_DRV1 = 0xa4 , GPIO_DRV2 = 0xa8 , GPIO_DRV3 = 0xac , GPIO_PUL0 = 0xb0 ,   GPIO_PUL1 = 0xb4 , GPIO_OFFSET = 0x80 , GPIO_CFG_MASK = 0xf , GPIO_DRV_MASK = 0x3 ,   R_GPIO_CFG0 = 0x00 , R_GPIO_CFG1 = 0x04 , R_GPIO_CFG2 = 0x08 , R_GPIO_CFG3 = 0x0c ,   R_GPIO_DAT = 0x500 , R_GPIO_DAT_SET = 0x504 , R_GPIO_DAT_CLR = 0x508 , R_GPIO_DRV0 = 0x14 ,   R_GPIO_DRV1 = 0x18 , R_GPIO_DRV2 = 0x1c , R_GPIO_DRV3 = 0x20 , R_GPIO_PUL0 = 0x24 ,   R_GPIO_PUL1 = 0x28 , R_GPIO_OFFSET = 0x30 , R_GPIO_CFG_MASK = 0xf , R_GPIO_DRV_MASK = 0x3 }

Functions
static uint32_t	_port_num (gpio_t pin)
	Extracts the port number from a GPIO pin.
static uint32_t	_port_base_get (gpio_t pin)
	Gets the base address of the port register for a GPIO pin.
static uint32_t	_pin_num (gpio_t pin)
	Extracts the pin number within a port from a GPIO pin.
void	sunxi_gpio_init (gpio_t pin, int cfg)
	Initializes a Sunxi GPIO pin with the specified configuration.
void	sunxi_gpio_set_value (gpio_t pin, int value)
	Sets the value of a Sunxi GPIO pin.
int	sunxi_gpio_read (gpio_t pin)
	Reads the value of a Sunxi GPIO pin.
void	sunxi_gpio_set_pull (gpio_t pin, enum gpio_pull_t pull)
	Sets the pull configuration of a Sunxi GPIO pin.
void	sunxi_gpio_set_drv (gpio_t pin, gpio_drv_t drv)
	Sets the drive strength of a Sunxi GPIO pin.

Enumeration Type Documentation

anonymous enum

anonymous enum

Enumerator
GPIO_CFG0
GPIO_CFG1
GPIO_CFG2
GPIO_CFG3
GPIO_DAT
GPIO_DAT_SET
GPIO_DAT_CLR
GPIO_DRV0
GPIO_DRV1
GPIO_DRV2
GPIO_DRV3
GPIO_PUL0
GPIO_PUL1
GPIO_OFFSET
GPIO_CFG_MASK
GPIO_DRV_MASK
R_GPIO_CFG0
R_GPIO_CFG1
R_GPIO_CFG2
R_GPIO_CFG3
R_GPIO_DAT
R_GPIO_DAT_SET
R_GPIO_DAT_CLR
R_GPIO_DRV0
R_GPIO_DRV1
R_GPIO_DRV2
R_GPIO_DRV3
R_GPIO_PUL0
R_GPIO_PUL1
R_GPIO_OFFSET
R_GPIO_CFG_MASK
R_GPIO_DRV_MASK

Function Documentation

_pin_num()

static uint32_t _pin_num ( gpio_t  pin )

inlinestatic

Extracts the pin number within a port from a GPIO pin.

This inline function extracts the pin number within a port from the given GPIO pin number.

Parameters

pin	The GPIO pin number.

Returns

The pin number within a port.

_port_base_get()

static uint32_t _port_base_get ( gpio_t  pin )

static

Gets the base address of the port register for a GPIO pin.

This function calculates and returns the base address of the port register for the specified GPIO pin.

Parameters

pin	The GPIO pin number.

Returns

The base address of the port register.

_port_num()

static uint32_t _port_num ( gpio_t  pin )

inlinestatic

Extracts the port number from a GPIO pin.

This inline function extracts the port number from the given GPIO pin number.

Parameters

pin	The GPIO pin number.

Returns

The port number.

sunxi_gpio_init()

void sunxi_gpio_init	(	gpio_t	pin,
		int	cfg
	)

Initializes a Sunxi GPIO pin with the specified configuration.

Initialize the specified GPIO pin with the given configuration.

This function initializes a Sunxi GPIO pin with the specified configuration. It sets the pin's configuration based on the provided parameters.

Parameters

pin	The GPIO pin to initialize.
cfg	The configuration value for the GPIO pin.

sunxi_gpio_read()

int sunxi_gpio_read

(

gpio_t

pin

)

Reads the value of a Sunxi GPIO pin.

Read the value of the specified GPIO pin.

This function reads the current value of a Sunxi GPIO pin and returns it.

Parameters

pin	The GPIO pin to read the value from.

Returns

The value of the GPIO pin (0 or 1).

sunxi_gpio_set_drv()

void sunxi_gpio_set_drv	(	gpio_t	pin,
		gpio_drv_t	drv
	)

Sets the drive strength of a Sunxi GPIO pin.

This function sets the drive strength for the specified GPIO pin.

Parameters

pin	The GPIO pin to set the drive strength for.
drv	The drive strength value to set (GPIO_DRV_LOW, GPIO_DRV_MEDIUM, or GPIO_DRV_HIGH).

sunxi_gpio_set_pull()

void sunxi_gpio_set_pull	(	gpio_t	pin,
		enum gpio_pull_t	pull
	)

Sets the pull configuration of a Sunxi GPIO pin.

Set the pull configuration for the specified GPIO pin.

This function sets the pull-up, pull-down, or no pull configuration for the specified GPIO pin.

Parameters

pin	The GPIO pin to set the pull configuration for.
pull	The pull configuration to set (GPIO_PULL_UP, GPIO_PULL_DOWN, or GPIO_PULL_NONE).

sunxi_gpio_set_value()

void sunxi_gpio_set_value	(	gpio_t	pin,
		int	value
	)

Sets the value of a Sunxi GPIO pin.

Set the value of the specified GPIO pin.

This function sets the value of a Sunxi GPIO pin to the specified value (0 or 1).

Parameters

pin	The GPIO pin to set the value for.
value	The value to set (0 or 1).