neorv32_gpio.c File Reference

General purpose input/output port unit (GPIO) HW driver source file. More...

#include <neorv32.h>

Functions
int	neorv32_gpio_available (void)
void	neorv32_gpio_pin_set (int pin, int value)
void	neorv32_gpio_pin_toggle (int pin)
uint32_t	neorv32_gpio_pin_get (int pin)
void	neorv32_gpio_port_set (uint64_t port_data)
void	neorv32_gpio_port_toggle (uint64_t toggle)
uint64_t	neorv32_gpio_port_get (void)

Detailed Description

General purpose input/output port unit (GPIO) HW driver source file.

Note

These functions should only be used if the GPIO unit was synthesized (IO_GPIO_EN = true).

See also

https://stnolting.github.io/neorv32/sw/files.html

Function Documentation

neorv32_gpio_available()

int neorv32_gpio_available

(

void

)

Check if GPIO unit was synthesized.

Returns

0 if GPIO was not synthesized, 1 if GPIO is available.

neorv32_gpio_pin_get()

uint32_t neorv32_gpio_pin_get

(

int

pin

)

Get single pin of GPIO's input port.

Parameters

[in]

pin

Input pin to be read (0..63).

Returns

=0 if pin is low, !=0 if pin is high.

neorv32_gpio_pin_set()

void neorv32_gpio_pin_set	(	int	pin,
		int	value )

Set single pin of GPIO's output port.

Parameters

[in]	pin	Output pin number to be set (0..63).
[in]	value	Set pint high (1) or low (0).

neorv32_gpio_pin_toggle()

void neorv32_gpio_pin_toggle

(

int

pin

)

Toggle single pin of GPIO's output port.

Parameters

[in]

pin

Output pin number to be toggled (0..63).

neorv32_gpio_port_get()

uint64_t neorv32_gpio_port_get

(

void

)

Get complete GPIO input port.

Returns

Current input port state (64-bit).

neorv32_gpio_port_set()

void neorv32_gpio_port_set

(

uint64_t

port_data

)

Set complete GPIO output port.

Parameters

[in]

port_data

New output port value (64-bit).

neorv32_gpio_port_toggle()

void neorv32_gpio_port_toggle

(

uint64_t

toggle

)

Toggle bit in entire GPIO output port.

Parameters

[in]

toggle

Bit mask; set bits will toggle the according output port (64-bit).