Simple Button Driver
Button API

Description

Simple Button Driver.


Introduction

The Simple Button driver is a module of the button driver that provides the functionality to initialize and read simple buttons.


Simple Button Configuration

Simple buttons use the sl_button_t struct and their sl_simple_button_context_t struct. These are automatically generated into the following files, as well as instance specific headers with macro definitions in them. The samples below are for a single instance called "inst0".

// sl_simple_button_instances.c
#include "sl_simple_button.h"
#include "sl_simple_button_inst0_config.h"
sl_simple_button_context_t simple_inst0_context = {
.state = 0,
.history = 0,
.port = SL_SIMPLE_BUTTON_INST0_PORT,
.pin = SL_SIMPLE_BUTTON_INST0_PIN,
.mode = SL_SIMPLE_BUTTON_INST0_MODE,
};
const sl_button_t sl_button_inst0 = {
.context = &simple_inst0_context,
.init = sl_simple_button_init ,
.get_state = sl_simple_button_get_state ,
.poll = sl_simple_button_poll_step ,
};
const sl_button_t *simple_button_array[] = {&sl_button_inst0};
const uint8_t simple_button_count = sizeof (simple_button_array) / sizeof (simple_button_array[0]);
void sl_simple_button_init_instances( void )
{
sl_button_init (&sl_button_inst0);
}
void sl_simple_button_poll_instances( void )
{
sl_button_poll_step (&sl_button_inst0);
}
Note
The sl_simple_button_instances.c file is shown with only one instance, but if more were in use they would all appear in this .c file.
// sl_simple_button_instances.h
#ifndef SL_SIMPLE_BUTTON_INSTANCES_H
#define SL_SIMPLE_BUTTON_INSTANCES_H
#include "sl_simple_button.h"
extern const sl_button_t sl_button_inst0;
void sl_simple_button_init_instances( void );
void sl_simple_button_poll_instances( void );
#endif // SL_SIMPLE_BUTTON_INSTANCES_H
Note
The sl_simple_button_instances.h file is shown with only one instance, but if more were in use they would all appear in this .h file.


Simple Button Usage

The simple button driver has no differences in its usage from the common button driver. See Usage .

Data Structures

struct sl_simple_button_context_t

Functions

sl_status_t sl_simple_button_init (void *context)
Initialize the simple button driver.
sl_button_state_t sl_simple_button_get_state (void *context)
Get the current state of the simple button.
void sl_simple_button_poll_step (void *context)
Poll the simple button.

Macros

#define SL_SIMPLE_BUTTON_MODE_POLL 0U
#define SL_SIMPLE_BUTTON_MODE_POLL_AND_DEBOUNCE 1U
#define SL_SIMPLE_BUTTON_MODE_INTERRUPT 2U
#define SL_SIMPLE_BUTTON_PRESSED 1U
#define SL_SIMPLE_BUTTON_RELEASED 0U
#define SL_SIMPLE_BUTTON_GET_STATE (context)   ( sl_simple_button_get_state ((context)))
#define SL_SIMPLE_BUTTON_GET_PORT (context)   ((( sl_simple_button_context_t *)(context))->port)
#define SL_SIMPLE_BUTTON_GET_PIN (context)   ((( sl_simple_button_context_t *)(context))->pin)
#define SL_SIMPLE_BUTTON_GET_MODE (context)   ((( sl_simple_button_context_t *)(context))->mode)

Function Documentation

◆ sl_simple_button_init()

sl_status_t sl_simple_button_init ( void * context )

Initialize the simple button driver.

Parameters
[in] context Pointer to simple-button specific data:
Returns
Status Code:
  • SL_STATUS_OK

◆ sl_simple_button_get_state()

sl_button_state_t sl_simple_button_get_state ( void * context )

Get the current state of the simple button.

Parameters
[in] context Pointer to simple-button specific data
Returns
Button State: Current state of the button
  • SL_SIMPLE_BUTTON_PRESSED
  • SL_SIMPLE_BUTTON_RELEASED

◆ sl_simple_button_poll_step()

void sl_simple_button_poll_step ( void * context )

Poll the simple button.

(button mode - poll / poll and debonuce)

Parameters
[in] context Pointer to simple-button specific data