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diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/examples/peripheral/spi/main.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/examples/peripheral/spi/main.c
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+/**
+ * Copyright (c) 2015 - 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.
+ * 
+ */
+#include "nrf_drv_spi.h"
+#include "app_util_platform.h"
+#include "nrf_gpio.h"
+#include "nrf_delay.h"
+#include "boards.h"
+#include "app_error.h"
+#include <string.h>
+#include "nrf_log.h"
+#include "nrf_log_ctrl.h"
+#include "nrf_log_default_backends.h"
+
+#define SPI_INSTANCE  0 /**< SPI instance index. */
+static const nrf_drv_spi_t spi = NRF_DRV_SPI_INSTANCE(SPI_INSTANCE);  /**< SPI instance. */
+static volatile bool spi_xfer_done;  /**< Flag used to indicate that SPI instance completed the transfer. */
+
+#define TEST_STRING "Nordic"
+static uint8_t       m_tx_buf[] = TEST_STRING;           /**< TX buffer. */
+static uint8_t       m_rx_buf[sizeof(TEST_STRING) + 1];    /**< RX buffer. */
+static const uint8_t m_length = sizeof(m_tx_buf);        /**< Transfer length. */
+
+/**
+ * @brief SPI user event handler.
+ * @param event
+ */
+void spi_event_handler(nrf_drv_spi_evt_t const * p_event,
+                       void *                    p_context)
+{
+    spi_xfer_done = true;
+    NRF_LOG_INFO("Transfer completed.");
+    if (m_rx_buf[0] != 0)
+    {
+        NRF_LOG_INFO(" Received:");
+        NRF_LOG_HEXDUMP_INFO(m_rx_buf, strlen((const char *)m_rx_buf));
+    }
+}
+
+int main(void)
+{
+    bsp_board_init(BSP_INIT_LEDS);
+
+    APP_ERROR_CHECK(NRF_LOG_INIT(NULL));
+    NRF_LOG_DEFAULT_BACKENDS_INIT();
+
+    nrf_drv_spi_config_t spi_config = NRF_DRV_SPI_DEFAULT_CONFIG;
+    spi_config.ss_pin   = SPI_SS_PIN;
+    spi_config.miso_pin = SPI_MISO_PIN;
+    spi_config.mosi_pin = SPI_MOSI_PIN;
+    spi_config.sck_pin  = SPI_SCK_PIN;
+    APP_ERROR_CHECK(nrf_drv_spi_init(&spi, &spi_config, spi_event_handler, NULL));
+
+    NRF_LOG_INFO("SPI example started.");
+
+    while (1)
+    {
+        // Reset rx buffer and transfer done flag
+        memset(m_rx_buf, 0, m_length);
+        spi_xfer_done = false;
+
+        APP_ERROR_CHECK(nrf_drv_spi_transfer(&spi, m_tx_buf, m_length, m_rx_buf, m_length));
+
+        while (!spi_xfer_done)
+        {
+            __WFE();
+        }
+
+        NRF_LOG_FLUSH();
+
+        bsp_board_led_invert(BSP_BOARD_LED_0);
+        nrf_delay_ms(200);
+    }
+}