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diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/examples/peripheral/lpcomp/main.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/examples/peripheral/lpcomp/main.c
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+/**
+ * Copyright (c) 2014 - 2018, Nordic Semiconductor ASA
+ * 
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form, except as embedded into a Nordic
+ *    Semiconductor ASA integrated circuit in a product or a software update for
+ *    such product, must reproduce the above copyright notice, this list of
+ *    conditions and the following disclaimer in the documentation and/or other
+ *    materials provided with the distribution.
+ * 
+ * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ * 
+ * 4. This software, with or without modification, must only be used with a
+ *    Nordic Semiconductor ASA integrated circuit.
+ * 
+ * 5. Any software provided in binary form under this license must not be reverse
+ *    engineered, decompiled, modified and/or disassembled.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ */
+/** @file
+ * @defgroup nrf_lpcomp_example main.c
+ * @{
+ * @ingroup nrf_lpcomp_example
+ * @brief LPCOMP example application main file.
+ *
+ * This is an example low power comparator application.
+ * The example requires that LPCOMP A,B inputs are connected with QENC A,B outputs and
+ * LPCOMP LED output is connected with LPCOMP LED input.
+ *
+ * Example uses software quadrature encoder simulator QENC.
+ * Quadrature encoder simulator uses one channel of GPIOTE module.
+ * The state of the encoder changes on the inactive edge of the sampling clock generated by LED output.
+ *
+ * In a infinite loop QENC produces variable number of positive and negative pulses
+ * synchronously with bursts of clock impulses generated by LPCOMP at LED output.
+ * The pulses are counted by LPCOMP operating in a REPORT mode.
+ * Pulses counted by LPCOMP are compared with pulses generated by QENC.
+ * The tests stops if there is a difference between number of pulses counted and generated.
+ *
+ */
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+
+#include "nrf.h"
+#include "nrf_delay.h"
+#include "nrf_drv_lpcomp.h"
+#include "nrf_error.h"
+#include "app_error.h"
+#include "boards.h"
+
+
+#include "nrf_log.h"
+#include "nrf_log_ctrl.h"
+#include "nrf_log_default_backends.h"
+
+#define WAVE_ON_PIN_NUMBER 2
+
+static volatile uint32_t voltage_falls_detected = 0;
+static volatile uint32_t voltage_falls_total    = 0;
+
+/**
+ * @brief LPCOMP event handler is called when LPCOMP detects voltage drop.
+ *
+ * This function is called from interrupt context so it is very important
+ * to return quickly. Don't put busy loops or any other CPU intensive actions here.
+ * It is also not allowed to call soft device functions from it (if LPCOMP IRQ
+ * priority is set to APP_IRQ_PRIORITY_HIGH).
+ */
+static void lpcomp_event_handler(nrf_lpcomp_event_t event)
+{
+    if (event == NRF_LPCOMP_EVENT_DOWN)
+    {
+        bsp_board_led_invert(BSP_BOARD_LED_0); // just change state of first LED
+        voltage_falls_detected++;
+        voltage_falls_total++;
+    }
+}
+
+
+/**
+ * @brief Print out detection statistics.
+ */
+static void print_statistics(void)
+{
+    while (voltage_falls_detected)
+    {
+        voltage_falls_detected--;
+        NRF_LOG_INFO("#%d fall detected", (int)voltage_falls_total);
+    }
+}
+
+
+/**
+ * @brief Initialize LPCOMP driver.
+ */
+static void lpcomp_init(void)
+{
+    uint32_t                err_code;
+
+    nrf_drv_lpcomp_config_t config = NRF_DRV_LPCOMP_DEFAULT_CONFIG;
+    config.input = NRF_LPCOMP_INPUT_2;
+    // initialize LPCOMP driver, from this point LPCOMP will be active and provided
+    // event handler will be executed when defined action is detected
+    err_code = nrf_drv_lpcomp_init(&config, lpcomp_event_handler);
+    APP_ERROR_CHECK(err_code);
+    nrf_drv_lpcomp_enable();
+}
+
+
+int main(void)
+{
+    bsp_board_init(BSP_INIT_LEDS);
+
+    nrf_gpio_cfg_output(WAVE_ON_PIN_NUMBER); // on this pin 2Hz wave will be generated
+
+#ifdef BSP_BUTTON_0
+    // configure pull-up on first button
+    nrf_gpio_cfg_input(BSP_BUTTON_0, NRF_GPIO_PIN_PULLUP);
+#endif
+
+    uint32_t err_code = NRF_LOG_INIT(NULL);
+    APP_ERROR_CHECK(err_code);
+
+    NRF_LOG_DEFAULT_BACKENDS_INIT();
+
+    lpcomp_init();
+
+    NRF_LOG_INFO("LPCOMP driver usage example started.");
+
+    while (true)
+    {
+        print_statistics();
+        bsp_board_led_on(BSP_BOARD_LED_1);
+        NRF_GPIO->OUTCLR = (1 << WAVE_ON_PIN_NUMBER);
+        nrf_delay_ms(100); // generate 100 ms pulse on selected pin
+        print_statistics();
+        bsp_board_led_off(BSP_BOARD_LED_1);
+        NRF_GPIO->OUTSET = (1 << WAVE_ON_PIN_NUMBER);
+        nrf_delay_ms(400);
+        NRF_LOG_FLUSH();
+    }
+}
+
+
+/** @} */