Simple Button Driver#

Simple Button Driver module provides APIs to initalize and read simple buttons. Subsequent sections provide more insight into button driver configuration and usage.

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 *sl_simple_button_array[] = {&sl_button_inst0};
const uint8_t simple_button_count = 1;

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.

Modules#

sl_simple_button_context_t