Simple LED Driver#

Simple LED Driver can be used to execute basic LED functionalities such as on, off, toggle, or retrive the on/off status on Silicon Labs devices.

Subsequent sections provide more insight into this module.

Introduction#

The Simple LED driver is a module of the LED driver that provides the functionality to control simple on/off LEDs.

Simple LED Configuration#

Simple LEDs use the sl_led_t struct and their sl_simple_led_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_led_instances.c

#include "sl_simple_led.h"
#include "em_gpio.h"
#include "sl_simple_led_inst0_config.h"

sl_simple_led_context_t simple_inst0_context = {
  .port = SL_SIMPLE_LED_INST0_PORT,
  .pin = SL_SIMPLE_LED_INST0_PIN,
  .polarity = SL_SIMPLE_LED_INST0_POLARITY,
};

const sl_led_t sl_led_inst0 = {
  .context = &simple_inst0_context,
  .init = sl_simple_led_init,
  .turn_on = sl_simple_led_turn_on,
  .turn_off = sl_simple_led_turn_off,
  .toggle = sl_simple_led_toggle,
  .get_state = sl_simple_led_get_state,
};

void sl_simple_led_init_instances(void)
{
  sl_led_init(&sl_led_inst0);
}

Note

• The sl_simple_led_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_led_instances.h

#ifndef SL_SIMPLE_LED_INSTANCES_H
#define SL_SIMPLE_LED_INSTANCES_H

#include "sl_simple_led.h"

extern const sl_led_t sl_led_inst0;

void sl_simple_led_init_instances(void);

#endif // SL_SIMPLE_LED_INIT_H

Note

• The sl_simple_led_instances.h file is shown with only one instance, but if more were in use they would all appear in this .h file.

Simple LED Usage#

The simple LED driver is for LEDs with basic on off functionality, and there are no additional functions beyond those in the common driver. The LEDs can be turned on and off, toggled, and their on/off state can be retrieved. The following code shows how to control these LEDs. An LED should always be initialized before calling any other functions with it.

// initialize simple LED
sl_simple_led_init(&simple_led_inst0);

// turn on simple LED, turn off simple LED, and toggle the simple LED
sl_simple_led_turn_on(&simple_led_inst0);
sl_simple_led_turn_off(&simple_led_inst0);
sl_simple_led_toggle(&simple_led_inst0);

// get the state of the simple LED
sl_led_state_t state = sl_simple_led_get_state(&simple_led_instance0);

Modules#

sl_simple_led_context_t

0U

1U