Description

A collection of macros and functions that simplifies defining and using General Purpose I/O pins.

File(s):

Use a minimum compiler optimization level of 1, otherwise code bloat will occur. Even an innocuous C statement such as "PORTB |= (1 << 2);" will result in several redundant assembly instructions at -O0.

A GPIO pin is defined using the PX_GPIO utility macro, e.g.

// LED is an output pin on PORTB, bit 2, initially off

#define PX_GPIO_LED PX_GPIO(B, 2, PX_GPIO_DIR_OUT, PX_GPIO_INIT_LO)

Now wherever PX_GPIO_LED is found, the C preprocessor will substitute it with the following sequence:

&PORTB, &DDRB, &PINB, 2, PX_GPIO_DIR_OUT, PX_GPIO_INIT_LO

PX_GPIO_INIT_LO

@ PX_GPIO_INIT_LO

Initialize output pin low (0)

Definition: px_gpio.h:208

PX_GPIO_DIR_OUT

@ PX_GPIO_DIR_OUT

Set pin direction to output.

Definition: px_gpio.h:202

There are 3 ways to use this GPIO driver:

The first way is to use macros that utilize the C preprocessor to resolve to optimal C code before it is fed to the compiler. The disadvantage of this approach is the lack of syntax checking and the obtuse error message that the compiler may generate. The recursive macro magic is demonstrated with an example:

The following code:

// Enable LED

PX_GPIO_OUT_SET_HI(PX_GPIO_LED);

PX_GPIO_OUT_SET_HI

#define PX_GPIO_OUT_SET_HI(gpio)

Set GPIO pin output high.

Definition: px_gpio.h:218

Expands to:

_PX_GPIO_OUT_SET_HI(&PORTB, &DDRB, &PINB, 2, PX_GPIO_DIR_OUT, PX_GPIO_INIT_LO);

Which reduces to:

PX_BIT_SET_HI(*(&PORTB), 2);

PX_BIT_SET_HI

#define PX_BIT_SET_HI(var, bit)

Set a bit (1)

Definition: px_defs.h:178

Which reduces even further to:

do {PORTB |= (1 << 2);} while(0);

Which the optimizing compiler replaces with a single assembly statement:

sbi 0x05, 2;

Which enables the LED :)

Example:

#include "px_gpio.h"
 
// LED is on PORT B, pin 0, configured as an output, initally off
#define PX_GPIO_LED    PX_GPIO(B, 0, PX_GPIO_DIR_OUT, PX_GPIO_INIT_LO)
// Push Button is on PORT D, pin 7, configured as an input, pull-up enabled
#define PX_GPIO_PB     PX_GPIO(D, 7, PX_GPIO_DIR_IN, PX_GPIO_INIT_PULL_UP)
 
int main(void)
{
    // Initialise pins
    PX_GPIO_INIT(PX_GPIO_LED);
    PX_GPIO_INIT(PX_GPIO_PB);
 
    // Loop forever
    while(true)
    {
        // Is button being pressed?
        if(PX_GPIO_IN_IS_LO(PX_GPIO_PB))
        {
            // Enable LED
            PX_GPIO_OUT_SET_HI(PX_GPIO_LED);
        }
        else
        {
            // Disable LED
            PX_GPIO_OUT_SET_LO(PX_GPIO_LED);
        }
    }
}

Even though it appears that functions calls are used, the lines reduce to single assembly statements for maximum efficiency and minimum code size:

// Initialise pins
PX_GPIO_INIT(PX_GPIO_LED);
7a: 28 98           cbi 0x05, 0 ; 5
7c: 20 9a           sbi 0x04, 0 ; 4
PX_GPIO_INIT(PX_GPIO_PB);
7e: 5f 9a           sbi 0x0b, 7 ; 11
80: 57 98           cbi 0x0a, 7 ; 10
 
// Loop forever
while(true)
{
    // Is button being pressed?
    if(PX_GPIO_IN_IS_LO(PX_GPIO_PB))
82: 4f 99           sbic    0x09, 7 ; 9
84: 02 c0           rjmp    .+4         ; 0x8a <main+0x10>
    {
        // Enable LED
        PX_GPIO_OUT_SET_HI(PX_GPIO_LED);
86: 28 9a           sbi 0x05, 0 ; 5
88: fc cf           rjmp    .-8         ; 0x82 <main+0x8>
    }
    else
    {
        // Disable LED
        PX_GPIO_OUT_SET_LO(PX_GPIO_LED);
8a: 28 98           cbi 0x05, 0 ; 5
8c: fa cf           rjmp    .-12        ; 0x82 <main+0x8>

The second method is to declare the GPIO pin info as a 'static const' structure in an H file and use inline C functions. If the compiler optimisation is enabled then the code will also resolve to (mostly) single assembly statements during compile time.

Don't forget to prefix 'static const'! The compiler must know that the GPIO pin data will never change so that it can make the best optimization decisions.

Example (in an H file):

// LED is an output pin on PORTB, bit 2, initially off
#define PX_GPIO_LED PX_GPIO(B, 2, PX_GPIO_DIR_OUT, PX_GPIO_INIT_LO)
static const px_gpio_t px_gpio_led = {PX_GPIO_LED};
 
// Inline function to enable the LED
static inline void led_enable(void)
{
    px_gpio_out_set_hi(&px_gpio_led);
}

Example:

#include "px_gpio.h"
 
// LED is on PORT B, pin 0, configured as an output, initally off
#define PX_GPIO_LED    PX_GPIO(B, 0, PX_GPIO_DIR_OUT, PX_GPIO_INIT_LO)
// Push Button is on PORT D, pin 6, configured as an input, pull-up enabled
#define PX_GPIO_PB     PX_GPIO(D, 6, PX_GPIO_DIR_IN, PX_GPIO_INIT_PULL_UP)
 
/*
 *  Declare gpio handle objects as 'static const' to tell the compiler that it
 *  will not be used anywhere else ('static') and it will never change ('const').
 * 
 *  This gives the compiler the most freedom to optimize the code.
 */
static const px_gpio_handle_t px_gpio_led = {PX_GPIO_LED};
static const px_gpio_handle_t px_gpio_pb  = {PX_GPIO_PB};
 
int main(void)
{    
    // Initialise pins
    px_gpio_init(&px_gpio_led);
    px_gpio_init(&px_gpio_pb);
 
    // Loop forever
    while(true)
    {
        // Is button being pressed?
        if(px_gpio_in_is_lo(&px_gpio_pb))
        {
            // Enable LED
            px_gpio_out_set_hi(&px_gpio_led);
        }
        else
        {
            // Disable LED
            px_gpio_out_set_lo(&px_gpio_led);
        }
    }
}

The third method is to declare a GPIO pin as a dynamic structure that can change by the code while it is executing. This is useful where GPIO pin mapping must be changed on the fly.

Example (in a C file):

// LED is an output pin on PORTB, bit 2, initially off
#define PX_GPIO_LED PX_GPIO(B, 2, PX_GPIO_DIR_OUT, PX_GPIO_INIT_LO)
 
// Declare LED gpio structure
px_gpio_t px_gpio_led;
 
void led_init(bool led_on)
{
    // LED is an output pin on PORTB, bit 2, initially off
    px_gpio_open(&px_gpio_led, PX_GPIO_LED);
    // Initialise LED pin
    px_gpio_init(&px_gpio_led);
    if(led_on)
    {
        // Enable LED
        px_gpio_out_set_hi(&px_gpio_led);
    }
}

Data Structures
struct	px_gpio_handle_t
	GPIO pin handle definition. More...

Macros
#define	PX_GPIO(port, bit, dir, init) &PORT ## port, &DDR ## port, &PIN ## port, bit, dir, init
	Helper macro to define a GPIO pin. More...

#define	PX_GPIO_INIT(gpio) _GPIO_INIT(gpio)
	Initialise a GPIO pin. More...

#define	PX_GPIO_OUT_SET_HI(gpio) _GPIO_OUT_SET_HI(gpio)
	Set GPIO pin output high. More...

#define	PX_GPIO_OUT_SET_LO(gpio) _GPIO_PIN_OUT_SET_LO(gpio)
	Set GPIO pin output low. More...

#define	PX_GPIO_OUT_TOGGLE(gpio) _GPIO_OUT_TOGGLE(gpio)
	Toggle GPIO pin output. More...

#define	PX_GPIO_OUT_IS_HI(gpio) _GPIO_OUT_IS_HI(gpio)
	Test if GPIO pin output is set high. More...

#define	PX_GPIO_OUT_IS_LO(gpio) _GPIO_OUT_IS_LO(gpio)
	Test if GPIO pin output is set low. More...

#define	PX_GPIO_IN_IS_HI(gpio) _GPIO_IN_IS_HI(gpio)
	Test if GPIO pin input is high. More...

#define	PX_GPIO_IN_IS_LO(gpio) _GPIO_IN_IS_LO(gpio)
	Test if GPIO pin input is low. More...

#define	PX_GPIO_DIR_SET_OUT(gpio) _GPIO_DIR_SET_OUT(gpio)
	Set GPIO pin direction to output. More...

#define	PX_GPIO_DIR_SET_IN(gpio) _GPIO_DIR_SET_IN(gpio)
	Set GPIO pin direction to input. More...

#define	PX_GPIO_DIR_IS_OUT(gpio) _GPIO_DIR_IS_OUT(gpio)
	Test if GPIO pin is configured to be an output. More...

#define	PX_GPIO_DIR_IS_IN(gpio) _GPIO_DIR_IS_IN(gpio)
	Test if GPIO pin is configured to be an input. More...

#define	PX_GPIO_PULL_UP_ENABLE(gpio) _GPIO_PULL_UP_ENABLE(gpio)
	Enable pull-up on GPIO pin. More...

#define	PX_GPIO_PULL_DISABLE(gpio) _GPIO_PULL_DISABLE(gpio)
	Disable pull-up on GPIO pin. More...

#define	PX_GPIO_INIT_DDR(gpio) _GPIO_INIT_DDR(gpio)
	Macro to calculate bit mask used to initialise DDR register. More...

#define	PX_GPIO_INIT_PORT(gpio) _GPIO_INIT_PORT(gpio)
	Macro to calculate bit mask used to initialise PORT register. More...

Typedefs
typedef volatile uint8_t *	px_gpio_reg_t
	GPIO peripheral register address definition. More...

Enumerations
enum	px_gpio_dir_t { PX_GPIO_DIR_IN = 0 , PX_GPIO_DIR_OUT = 1 }
	GPIO dir selection. More...

enum	px_gpio_init_t { PX_GPIO_INIT_LO = 0 , PX_GPIO_INIT_HI = 1 , PX_GPIO_INIT_HIZ = 0 , PX_GPIO_INIT_PULL_UP = 1 }
	GPIO init selection. More...

Functions
void	px_gpio_open (px_gpio_handle_t *gpio, px_gpio_reg_t port, px_gpio_reg_t ddr, px_gpio_reg_t pin, uint8_t bit, uint8_t dir, uint8_t init)
	Initialise a GPIO structure. More...

void	px_gpio_init (const px_gpio_handle_t *gpio)
	Initialise a GPIO pin. More...

uint8_t	px_gpio_init_ddr (const px_gpio_handle_t *gpio)
	Calculate bit mask used to initialise DDR register. More...

uint8_t	px_gpio_init_port (const px_gpio_handle_t *gpio)
	Calculate bit mask used to initialise PORT register. More...

void	px_gpio_out_set_hi (const px_gpio_handle_t *gpio)
	Set GPIO pin output high. More...

void	px_gpio_out_set_lo (const px_gpio_handle_t *gpio)
	Set GPIO pin output low. More...

void	px_gpio_out_toggle (const px_gpio_handle_t *gpio)
	Toggle GPIO pin output. More...

bool	px_gpio_out_is_hi (const px_gpio_handle_t *gpio)
	Test if GPIO pin output is set high. More...

bool	px_gpio_out_is_lo (const px_gpio_handle_t *gpio)
	Test if GPIO pin output is set low. More...

bool	px_gpio_in_is_hi (const px_gpio_handle_t *gpio)
	Test if GPIO pin input is high. More...

bool	px_gpio_in_is_lo (const px_gpio_handle_t *gpio)
	Test if GPIO pin input is low. More...

void	px_gpio_dir_set_out (const px_gpio_handle_t *gpio)
	Set GPIO pin direction to output. More...

void	px_gpio_dir_set_in (const px_gpio_handle_t *gpio)
	Set GPIO pin direction to input. More...

bool	px_gpio_dir_is_out (const px_gpio_handle_t *gpio)
	Test if GPIO pin is configured to be an output. More...

bool	px_gpio_dir_is_in (const px_gpio_handle_t *gpio)
	Test if GPIO pin is configured to be an input. More...

void	px_gpio_pull_up_enable (const px_gpio_handle_t *gpio)
	Enable pull-up on GPIO pin. More...

void	px_gpio_pull_up_disable (const px_gpio_handle_t *gpio)
	Disable pull-up on GPIO pin. More...

Data Structure Documentation

◆ px_gpio_handle_t

struct px_gpio_handle_t

GPIO pin handle definition.

Definition at line 113 of file px_gpio.h.

Data Fields
GPIO_TypeDef *	gpio_base_reg	GPIO peripheral base register address.
uint8_t	pin	Pin: 0, 1, 2, ..., or 15.
px_gpio_mode_t	mode	Mode: Input, Output, Alternative Function or Analog.
px_gpio_otype_t	otype	Output type: push-pull or open-drain.
px_gpio_ospeed_t	ospeed	Output speed: low, medium, high or very high.
px_gpio_pull_t	pull	None, pull-up or pull-down.
px_gpio_out_init_t	out_init	Initial output value: Low (0) or high (1)
px_gpio_af_t	af	Alternative function: AF0, AF1, ... or AF7.
px_gpio_reg_t	port	PORTx register address.
px_gpio_reg_t	ddr	DDRx register address.
px_gpio_reg_t	pin	PINx register address.
uint8_t	bit	Bit: 0, 1, 2, 3, 4, 5, 6 or 7.
uint8_t	dir	Direction: PX_GPIO_DIR_OUT or PX_GPIO_DIR_IN.
uint8_t	init	Initial value: PX_GPIO_INIT_HI, PX_GPIO_INIT_LO, PX_GPIO_INIT_HIZ or PX_GPIO_INIT_PULL_UP.

Macro Definition Documentation

◆ PX_GPIO

#define PX_GPIO	(	port,
		bit,
		dir,
		init
	)	&PORT ## port, &DDR ## port, &PIN ## port, bit, dir, init

Helper macro to define a GPIO pin.

Usage example:

// LED is an output pin on PORTD, bit 7, initially off
#define PX_GPIO_LED    GPIO(D, 7, PX_GPIO_DIR_OUT, PX_GPIO_INIT_LO)
 
// PX_GPIO_LED will be replaced by the C preprocessor with the following
// sequence:
// &PORTD, &DDRD, &PIND, 7, PX_GPIO_DIR_OUT, PX_GPIO_INIT_LO

Parameters

port	A, B, C, ...
bit	0, 1, 2, 3, 4, 5, 6 or 7
dir	PX_GPIO_DIR_OUT or PX_GPIO_DIR_IN
init	PX_GPIO_INIT_HI, PX_GPIO_INIT_LO, PX_GPIO_INIT_HIZ or PX_GPIO_INIT_PULL_UP

Definition at line 250 of file px_gpio.h.

◆ PX_GPIO_INIT

#define PX_GPIO_INIT ( gpio ) _GPIO_INIT(gpio)

Initialise a GPIO pin.

Definition at line 254 of file px_gpio.h.

◆ PX_GPIO_OUT_SET_HI

#define PX_GPIO_OUT_SET_HI ( gpio ) _GPIO_OUT_SET_HI(gpio)

Set GPIO pin output high.

Definition at line 278 of file px_gpio.h.

◆ PX_GPIO_OUT_SET_LO

#define PX_GPIO_OUT_SET_LO ( gpio ) _GPIO_PIN_OUT_SET_LO(gpio)

Set GPIO pin output low.

Definition at line 282 of file px_gpio.h.

◆ PX_GPIO_OUT_TOGGLE

#define PX_GPIO_OUT_TOGGLE ( gpio ) _GPIO_OUT_TOGGLE(gpio)

Toggle GPIO pin output.

Definition at line 286 of file px_gpio.h.

◆ PX_GPIO_OUT_IS_HI

#define PX_GPIO_OUT_IS_HI ( gpio ) _GPIO_OUT_IS_HI(gpio)

Test if GPIO pin output is set high.

Definition at line 290 of file px_gpio.h.

◆ PX_GPIO_OUT_IS_LO

#define PX_GPIO_OUT_IS_LO ( gpio ) _GPIO_OUT_IS_LO(gpio)

Test if GPIO pin output is set low.

Definition at line 294 of file px_gpio.h.

◆ PX_GPIO_IN_IS_HI

#define PX_GPIO_IN_IS_HI ( gpio ) _GPIO_IN_IS_HI(gpio)

Test if GPIO pin input is high.

Definition at line 298 of file px_gpio.h.

◆ PX_GPIO_IN_IS_LO

#define PX_GPIO_IN_IS_LO ( gpio ) _GPIO_IN_IS_LO(gpio)

Test if GPIO pin input is low.

Definition at line 302 of file px_gpio.h.

◆ PX_GPIO_DIR_SET_OUT

#define PX_GPIO_DIR_SET_OUT ( gpio ) _GPIO_DIR_SET_OUT(gpio)

Set GPIO pin direction to output.

Definition at line 306 of file px_gpio.h.

◆ PX_GPIO_DIR_SET_IN

#define PX_GPIO_DIR_SET_IN ( gpio ) _GPIO_DIR_SET_IN(gpio)

Set GPIO pin direction to input.

Definition at line 310 of file px_gpio.h.

◆ PX_GPIO_DIR_IS_OUT

#define PX_GPIO_DIR_IS_OUT ( gpio ) _GPIO_DIR_IS_OUT(gpio)

Test if GPIO pin is configured to be an output.

Definition at line 314 of file px_gpio.h.

◆ PX_GPIO_DIR_IS_IN

#define PX_GPIO_DIR_IS_IN ( gpio ) _GPIO_DIR_IS_IN(gpio)

Test if GPIO pin is configured to be an input.

Definition at line 318 of file px_gpio.h.

◆ PX_GPIO_PULL_UP_ENABLE

#define PX_GPIO_PULL_UP_ENABLE ( gpio ) _GPIO_PULL_UP_ENABLE(gpio)

Enable pull-up on GPIO pin.

Definition at line 322 of file px_gpio.h.

◆ PX_GPIO_PULL_DISABLE

#define PX_GPIO_PULL_DISABLE ( gpio ) _GPIO_PULL_DISABLE(gpio)

Disable pull-up on GPIO pin.

Definition at line 326 of file px_gpio.h.

◆ PX_GPIO_INIT_DDR

#define PX_GPIO_INIT_DDR ( gpio ) _GPIO_INIT_DDR(gpio)

Macro to calculate bit mask used to initialise DDR register.

Definition at line 330 of file px_gpio.h.

◆ PX_GPIO_INIT_PORT

#define PX_GPIO_INIT_PORT ( gpio ) _GPIO_INIT_PORT(gpio)

Macro to calculate bit mask used to initialise PORT register.

Definition at line 334 of file px_gpio.h.

Typedef Documentation

◆ px_gpio_reg_t

typedef volatile uint8_t* px_gpio_reg_t

GPIO peripheral register address definition.

Definition at line 215 of file px_gpio.h.

Enumeration Type Documentation

◆ px_gpio_dir_t

enum px_gpio_dir_t

GPIO dir selection.

Enumerator
PX_GPIO_DIR_IN	Set pin direction to input.
PX_GPIO_DIR_OUT	Set pin direction to output.

Definition at line 199 of file px_gpio.h.

◆ px_gpio_init_t

enum px_gpio_init_t

GPIO init selection.

Enumerator
PX_GPIO_INIT_LO	Initialize output pin low (0)
PX_GPIO_INIT_HI	Initialize output pin high (1)
PX_GPIO_INIT_HIZ	Initialize input pin as high impedance (no pull-up)
PX_GPIO_INIT_PULL_UP	Initialize input pin with pull-up enabled.

Definition at line 206 of file px_gpio.h.

Function Documentation

◆ px_gpio_open()

void px_gpio_open	(	px_gpio_handle_t *	gpio,
		px_gpio_reg_t	port,
		px_gpio_reg_t	ddr,
		px_gpio_reg_t	pin,
		uint8_t	bit,
		uint8_t	dir,
		uint8_t	init
	)

inline

Initialise a GPIO structure.

Parameters

[out]	gpio	px_gpio_t structure
[in]	port	PORTx register address, e.g. &PORTB
[in]	ddr	DDRx register address, e.g. &DDRB
[in]	pin	PINx register address, e.g. &PINB
[in]	bit	Bit: 0, 1, 2, 3, 4, 5, 6 or 7
[in]	dir	Direction: PX_GPIO_DIR_OUT or PX_GPIO_DIR_IN
[in]	init	Initial value: PX_GPIO_INIT_HI, PX_GPIO_INIT_LO, PX_GPIO_INIT_HIZ or PX_GPIO_INIT_PULL_UP

Example:

px_gpio_t px_gpio_led;
 
px_gpio_init(&px_gpio_led, &PORTD, &DDRD, &PIND, 7, PX_GPIO_DIR_OUT, PX_GPIO_INIT_LO);

Definition at line 358 of file px_gpio.h.

◆ px_gpio_init()

void px_gpio_init ( const px_gpio_handle_t * gpio )

inline

Initialise a GPIO pin.

Initialise a GPIO pin using supplied handle.

Definition at line 375 of file px_gpio.h.

◆ px_gpio_init_ddr()

uint8_t px_gpio_init_ddr ( const px_gpio_handle_t * gpio )

inline

Calculate bit mask used to initialise DDR register.

Definition at line 396 of file px_gpio.h.

◆ px_gpio_init_port()

uint8_t px_gpio_init_port ( const px_gpio_handle_t * gpio )

inline

Calculate bit mask used to initialise PORT register.

Definition at line 402 of file px_gpio.h.

◆ px_gpio_out_set_hi()

void px_gpio_out_set_hi ( const px_gpio_handle_t * gpio )

inline

Set GPIO pin output high.

Definition at line 408 of file px_gpio.h.

◆ px_gpio_out_set_lo()

void px_gpio_out_set_lo ( const px_gpio_handle_t * gpio )

inline

Set GPIO pin output low.

Definition at line 414 of file px_gpio.h.

◆ px_gpio_out_toggle()

void px_gpio_out_toggle ( const px_gpio_handle_t * gpio )

inline

Toggle GPIO pin output.

Definition at line 420 of file px_gpio.h.

◆ px_gpio_out_is_hi()

bool px_gpio_out_is_hi ( const px_gpio_handle_t * gpio )

inline

Test if GPIO pin output is set high.

Definition at line 426 of file px_gpio.h.

◆ px_gpio_out_is_lo()

bool px_gpio_out_is_lo ( const px_gpio_handle_t * gpio )

inline

Test if GPIO pin output is set low.

Definition at line 432 of file px_gpio.h.

◆ px_gpio_in_is_hi()

bool px_gpio_in_is_hi ( const px_gpio_handle_t * gpio )

inline

Test if GPIO pin input is high.

Definition at line 438 of file px_gpio.h.

◆ px_gpio_in_is_lo()

bool px_gpio_in_is_lo ( const px_gpio_handle_t * gpio )

inline

Test if GPIO pin input is low.

Definition at line 444 of file px_gpio.h.

◆ px_gpio_dir_set_out()

void px_gpio_dir_set_out ( const px_gpio_handle_t * gpio )

inline

Set GPIO pin direction to output.

Definition at line 450 of file px_gpio.h.

◆ px_gpio_dir_set_in()

void px_gpio_dir_set_in ( const px_gpio_handle_t * gpio )

inline

Set GPIO pin direction to input.

Definition at line 456 of file px_gpio.h.

◆ px_gpio_dir_is_out()

bool px_gpio_dir_is_out ( const px_gpio_handle_t * gpio )

inline

Test if GPIO pin is configured to be an output.

Definition at line 462 of file px_gpio.h.

◆ px_gpio_dir_is_in()

bool px_gpio_dir_is_in ( const px_gpio_handle_t * gpio )

inline

Test if GPIO pin is configured to be an input.

Definition at line 468 of file px_gpio.h.

◆ px_gpio_pull_up_enable()

void px_gpio_pull_up_enable ( const px_gpio_handle_t * gpio )

inline

Enable pull-up on GPIO pin.

Definition at line 474 of file px_gpio.h.

◆ px_gpio_pull_up_disable()

void px_gpio_pull_up_disable ( const px_gpio_handle_t * gpio )

inline

Disable pull-up on GPIO pin.

Definition at line 480 of file px_gpio.h.

Description

Data Structures

Macros

Typedefs

Enumerations

Functions

Data Structure Documentation

◆ px_gpio_handle_t

Macro Definition Documentation

◆ PX_GPIO

◆ PX_GPIO_INIT

◆ PX_GPIO_OUT_SET_HI

◆ PX_GPIO_OUT_SET_LO

◆ PX_GPIO_OUT_TOGGLE

◆ PX_GPIO_OUT_IS_HI

◆ PX_GPIO_OUT_IS_LO

◆ PX_GPIO_IN_IS_HI

◆ PX_GPIO_IN_IS_LO

◆ PX_GPIO_DIR_SET_OUT

◆ PX_GPIO_DIR_SET_IN

◆ PX_GPIO_DIR_IS_OUT

◆ PX_GPIO_DIR_IS_IN

◆ PX_GPIO_PULL_UP_ENABLE

◆ PX_GPIO_PULL_DISABLE

◆ PX_GPIO_INIT_DDR

◆ PX_GPIO_INIT_PORT

Typedef Documentation

◆ px_gpio_reg_t

Enumeration Type Documentation

◆ px_gpio_dir_t

◆ px_gpio_init_t

Function Documentation

◆ px_gpio_open()

◆ px_gpio_init()

◆ px_gpio_init_ddr()

◆ px_gpio_init_port()

◆ px_gpio_out_set_hi()

◆ px_gpio_out_set_lo()

◆ px_gpio_out_toggle()

◆ px_gpio_out_is_hi()

◆ px_gpio_out_is_lo()

◆ px_gpio_in_is_hi()

◆ px_gpio_in_is_lo()

◆ px_gpio_dir_set_out()

◆ px_gpio_dir_set_in()

◆ px_gpio_dir_is_out()

◆ px_gpio_dir_is_in()

◆ px_gpio_pull_up_enable()

◆ px_gpio_pull_up_disable()