NRF52-DK - initial commit

2020-03-08 07:38:24 +01:00
commit c31d32ded3
11 changed files with 3924 additions and 0 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -0,0 +1,4 @@
+bin/
+obj/
+nrf5sdk/
+git 
--- a/.vscode/c_cpp_properties.json
+++ b/.vscode/c_cpp_properties.json
@@ -0,0 +1,18 @@
+{
+    "configurations": [
+        {
+            "name": "Linux",
+            "includePath": [
+                "${workspaceFolder}/**",
+                "/usr/include/c++/8",
+                "/usr/include/x86_64-linux-gnu/c++/8"
+            ],
+            "defines": [],
+            "compilerPath": "/usr/bin/gcc",
+            "cStandard": "c11",
+            "cppStandard": "c++17",
+            "intelliSenseMode": "clang-x64"
+        }
+    ],
+    "version": 4
+}
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -0,0 +1,50 @@
+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Launch TCM",
+            "type": "cppdbg",
+            "request": "launch",
+            "program": "${workspaceFolder}/bin/nrf.elf",
+            "args": [],
+            "stopAtEntry": true,
+            "cwd": "${workspaceFolder}",
+            "environment": [],
+            "MIMode": "gdb",
+            "miDebuggerPath": "/opt/gcc-arm-none-eabi-7-2018-q2-update/bin/arm-none-eabi-gdb",
+            "debugServerPath": "JLinkGDBServerCLExe",
+            "debugServerArgs": "-device nrf52832_xxaa -if swd -port 2331",
+            "serverStarted": "Listening on TCP/IP port 2331",
+            "logging": {
+                "engineLogging": true,
+                "exceptions": true,
+                "moduleLoad": true,
+                "programOutput": true,
+                "trace": true,
+                "traceResponse": true
+            },
+             "setupCommands": [
+                {
+                    "description": "Enable pretty-printing for gdb.",
+                    "text": "-enable-pretty-printing",
+                    "ignoreFailures": false
+                },
+                {
+                    "description": "Connect to gdb server.",
+                    "text": "target remote localhost:2331",
+                    "ignoreFailures": false
+                },
+                {
+                    "description": "Load executable into debugger.",
+                    "text": "file ${workspaceFolder}/bin/nrf.elf",
+                    "ignoreFailures": false
+                },
+                {
+                    "description": "Load executable to target TCM",
+                    "text": "load",
+                    "ignoreFailures": false
+                }
+             ]
+        }
+    ]
+}
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -0,0 +1,11 @@
+{
+    "files.associations": {
+        "climits": "cpp",
+        "nrf_delay.h": "c",
+        "nrfx.h": "c",
+        "nrfx_config.h": "c",
+        "nrfx_common.h": "c",
+        "nrf.h": "c",
+        "boards.h": "c"
+    }
+}
--- a/.vscode/tasks.json
+++ b/.vscode/tasks.json
@@ -0,0 +1,86 @@
+{
+    // See https://go.microsoft.com/fwlink/?LinkId=733558
+    // for the documentation about the tasks.json format
+    "version": "2.0.0",
+    "options": {
+        "env": {
+            "ARCH": "posix",
+        },
+    },
+    "tasks": [
+        {
+            "label": "all",
+            "type":"shell",
+            "command": "make all -j8",
+            "problemMatcher": {
+                "base": "$gcc",
+                "owner": "gcc",
+                "fileLocation": [
+                    "relative",
+                    "${workspaceFolder}"
+                ]
+            },
+            "group": {
+                "kind": "build",
+                "isDefault": true
+            }
+        },
+        {
+            "label": "flash",
+            "type":"shell",
+            "command": "make flash",
+            "problemMatcher": {
+                "base": "$gcc",
+                "owner": "gcc",
+                "fileLocation": [
+                    "relative",
+                    "${workspaceFolder}"
+                ]
+            },
+            "group": {
+                "kind": "build",
+                "isDefault": true
+            }
+        },
+        {
+            "label": "clean",
+            "type":"shell",
+            "command": "make clean -j8",
+            "problemMatcher": {
+                "base": "$gcc",
+                "owner": "gcc",
+                "fileLocation": [
+                    "relative",
+                    "${workspaceFolder}"
+                ]
+            },
+            "group": {
+                "kind": "build",
+                "isDefault": true
+            }
+        },
+        {
+            "label": "distclean",
+            "type":"shell",
+            "command": "make distclean",
+            "problemMatcher": {
+                "base": "$gcc",
+                "owner": "gcc",
+                "fileLocation": [
+                    "relative",
+                    "${workspaceFolder}"
+                ]
+            },
+            "group": {
+                "kind": "build",
+                "isDefault": true
+            }
+        }
+    ],
+    "presentation": {
+        "focus": true,
+        "reveal": "always",
+        "panel": "shared",
+        "clear": true,
+    }
+}
--- a/196
+++ b/196
@@ -0,0 +1,196 @@
+CROSS_COMPILE ?= /opt/gcc-arm-none-eabi-7-2018-q2-update/bin/arm-none-eabi-
+
+TARGET_FILE ?= nrf.elf
+
+CC = $(CROSS_COMPILE)gcc
+CPP = $(CROSS_COMPILE)cpp
+OBJCOPY = $(CROSS_COMPILE)objcopy
+
+SRC_DIR = src
+OBJ_DIR = obj
+BIN_DIR = bin
+
+NRF_PATH := nrf5sdk/
+
+INCLUDES += include/
+
+INCLUDES += $(NRF_PATH)components/
+INCLUDES += $(NRF_PATH)modules/nrfx/mdk/
+INCLUDES += $(NRF_PATH)components/libraries/strerror/
+INCLUDES += $(NRF_PATH)components/softdevice/s132/headers/nrf52/
+INCLUDES += $(NRF_PATH)components/toolchain/cmsis/include/
+INCLUDES += $(NRF_PATH)components/libraries/util/
+INCLUDES += $(NRF_PATH)components/libraries/balloc/
+INCLUDES += $(NRF_PATH)components/libraries/ringbuf/
+INCLUDES += $(NRF_PATH)modules/nrfx/hal/
+INCLUDES += $(NRF_PATH)components/libraries/bsp/
+INCLUDES += $(NRF_PATH)components/libraries/log/
+INCLUDES += $(NRF_PATH)modules/nrfx/
+INCLUDES += $(NRF_PATH)components/libraries/experimental_section_vars/
+INCLUDES += $(NRF_PATH)components/softdevice/s132/headers/
+INCLUDES += $(NRF_PATH)components/libraries/delay/
+INCLUDES += $(NRF_PATH)integration/nrfx/
+INCLUDES += $(NRF_PATH)components/libraries/atomic/
+INCLUDES += $(NRF_PATH)components/boards/
+INCLUDES += $(NRF_PATH)components/libraries/memobj/
+INCLUDES += $(NRF_PATH)components/softdevice/common/
+INCLUDES += $(NRF_PATH)external/fprintf/
+INCLUDES += $(NRF_PATH)components/libraries/log/src/
+
+CPP_FLAGS += $(addprefix -I, $(INCLUDES))
+
+C_SRCS = $(wildcard $(SRC_DIR)/*.c)
+C_OBJS = $(patsubst $(SRC_DIR)%,$(OBJ_DIR)%,$(patsubst %.c,%.o,$(C_SRCS)))
+
+NRF_C_SRCS += $(NRF_PATH)components/libraries/log/src/nrf_log_frontend.c
+NRF_C_SRCS += $(NRF_PATH)components/libraries/log/src/nrf_log_str_formatter.c
+NRF_C_SRCS += $(NRF_PATH)components/boards/boards.c
+NRF_C_SRCS += $(NRF_PATH)components/libraries/util/app_error.c
+NRF_C_SRCS += $(NRF_PATH)components/libraries/util/app_error_handler_gcc.c
+NRF_C_SRCS += $(NRF_PATH)components/libraries/util/app_error_weak.c
+NRF_C_SRCS += $(NRF_PATH)components/libraries/util/app_util_platform.c
+NRF_C_SRCS += $(NRF_PATH)components/libraries/util/nrf_assert.c
+NRF_C_SRCS += $(NRF_PATH)components/libraries/atomic/nrf_atomic.c
+NRF_C_SRCS += $(NRF_PATH)components/libraries/balloc/nrf_balloc.c
+NRF_C_SRCS += $(NRF_PATH)external/fprintf/nrf_fprintf.c
+NRF_C_SRCS += $(NRF_PATH)external/fprintf/nrf_fprintf_format.c
+NRF_C_SRCS += $(NRF_PATH)components/libraries/memobj/nrf_memobj.c
+NRF_C_SRCS += $(NRF_PATH)components/libraries/ringbuf/nrf_ringbuf.c
+NRF_C_SRCS += $(NRF_PATH)components/libraries/experimental_section_vars/nrf_section_iter.c
+NRF_C_SRCS += $(NRF_PATH)components/libraries/strerror/nrf_strerror.c
+NRF_C_SRCS += $(NRF_PATH)modules/nrfx/soc/nrfx_atomic.c
+NRF_C_SRCS += $(NRF_PATH)modules/nrfx/mdk/system_nrf52.c
+NRF_C_SRCS += $(NRF_PATH)components/softdevice/common/nrf_sdh.c
+NRF_C_SRCS += $(NRF_PATH)components/softdevice/common/nrf_sdh_soc.c
+
+NRF_C_OBJS = $(patsubst $(NRF_PATH)%,$(OBJ_DIR)/%,$(patsubst %.c,%.o,$(NRF_C_SRCS)))
+
+NRF_A_SRCS = $(NRF_PATH)modules/nrfx/mdk/gcc_startup_nrf52.S
+NRF_A_OBJS = $(patsubst $(NRF_PATH)%,$(OBJ_DIR)/%,$(patsubst %.S,%.o,$(NRF_A_SRCS)))
+
+OBJS = $(NRF_A_OBJS) $(NRF_C_OBJS) $(C_OBJS)
+
+TARGET = $(BIN_DIR)/$(TARGET_FILE)
+TARGET_HEX = $(patsubst %.elf,%.hex,$(TARGET))
+TARGET_PACKAGE = $(patsubst %.hex,%.zip,$(TARGET_HEX))
+THIS_MAKEFILE := $(lastword $(MAKEFILE_LIST))
+
+###################################################
+OPT = 3
+# C flags common to all targets
+C_FLAGS += -O$(OPT) -g$(OPT)
+C_FLAGS += -DBOARD_PCA10040
+C_FLAGS += -DBSP_DEFINES_ONLY
+C_FLAGS += -DCONFIG_GPIO_AS_PINRESET
+C_FLAGS += -DFLOAT_ABI_HARD
+C_FLAGS += -DNRF52
+C_FLAGS += -DNRF52832_XXAA
+C_FLAGS += -DNRF52_PAN_74
+C_FLAGS += -DNRF_SD_BLE_API_VERSION=7
+C_FLAGS += -DS132
+C_FLAGS += -DSOFTDEVICE_PRESENT
+C_FLAGS += -mcpu=cortex-m4
+C_FLAGS += -mthumb -mabi=aapcs
+C_FLAGS += -Wall -Werror
+C_FLAGS += -mfloat-abi=hard -mfpu=fpv4-sp-d16
+# keep every function in a separate section, this allows linker to discard unused ones
+C_FLAGS += -ffunction-sections -fdata-sections -fno-strict-aliasing
+C_FLAGS += -fno-builtin -fshort-enums
+
+# Assembler flags common to all targets
+A_FLAGS += -g$(OPT)
+A_FLAGS += -mcpu=cortex-m4
+A_FLAGS += -mthumb -mabi=aapcs
+A_FLAGS += -mfloat-abi=hard -mfpu=fpv4-sp-d16
+A_FLAGS += -DBOARD_PCA10040
+A_FLAGS += -DBSP_DEFINES_ONLY
+A_FLAGS += -DCONFIG_GPIO_AS_PINRESET
+A_FLAGS += -DFLOAT_ABI_HARD
+A_FLAGS += -DNRF52
+A_FLAGS += -DNRF52832_XXAA
+A_FLAGS += -DNRF52_PAN_74
+A_FLAGS += -DNRF_SD_BLE_API_VERSION=7
+A_FLAGS += -DS132
+A_FLAGS += -DSOFTDEVICE_PRESENT
+
+LINKER_SCRIPT = blinky_gcc_nrf52.ld
+# Linker flags
+LD_FLAGS += -O$(OPT) -g$(OPT)
+LD_FLAGS += -mthumb -mabi=aapcs -L$(NRF_PATH)modules/nrfx/mdk -T$(LINKER_SCRIPT)
+LD_FLAGS += -mcpu=cortex-m4
+LD_FLAGS += -mfloat-abi=hard -mfpu=fpv4-sp-d16
+# let linker dump unused sections
+LD_FLAGS += -Wl,--gc-sections
+# use newlib in nano version
+LD_FLAGS += --specs=nano.specs
+
+C_FLAGS += -D__HEAP_SIZE=8192
+C_FLAGS += -D__HEAP_SIZE=8192
+
+A_FLAGS += -D__HEAP_SIZE=8192
+A_FLAGS += -D__HEAP_SIZE=8192
+
+# Add standard libraries at the very end of the linker input, after all objects
+# that may need symbols provided by these libraries.
+LIBS += c nosys m
+###################################################
+
+.PHONY: all install uninstall clean distclean debug package flash
+all: $(TARGET)
+
+debug:
+	@echo $(TARGET_HEX)
+
+clean:
+	rm -f $(TARGET) $(TARGET_HEX) $(TARGET_PACKAGE)
+	rm -f $(OBJS) $(patsubst %.o,%.d,$(OBJS))
+
+distclean:
+	rm -rf $(OBJ_DIR) $(BIN_DIR)
+
+package: $(TARGET_HEX) $(THIS_MAKEFILE)
+	nrfutil pkg generate --hw-version 52 --application-version 1 --application $(TARGET_HEX) --sd-req 0xCB --sd-id 0xCB --key-file keys/private.key $(TARGET_PACKAGE)
+
+flash: $(TARGET_HEX) $(THIS_MAKEFILE)
+	@echo Flashing: $(TARGET_HEX)
+	nrfjprog -f nrf52 --program $(TARGET_HEX) --sectorerase
+	nrfjprog -f nrf52 --reset
+
+flash_softdevice:
+	@echo Flashing: $(NRF_PATH)/components/softdevice/s132/hex/s132_nrf52_7.0.1_softdevice.hex
+	nrfjprog -f nrf52 --program $(NRF_PATH)/components/softdevice/s132/hex/s132_nrf52_7.0.1_softdevice.hex --sectorerase
+	nrfjprog -f nrf52 --reset
+
+erase:
+	nrfjprog -f nrf52 --eraseall
+
+$(TARGET): $(OBJS) $(THIS_MAKEFILE)
+	@mkdir -p $(BIN_DIR)
+	$(CC) $(CC_FLAGS) $(LD_FLAGS) $(OBJS) $(addprefix -l,$(LIBS)) -o $@
+
+$(TARGET_HEX): $(TARGET) $(THIS_MAKEFILE)
+	$(OBJCOPY) -O ihex $(TARGET) $(TARGET_HEX)
+
+$(OBJ_DIR)/%.d: $(SRC_DIR)/%.c
+	@mkdir -p $(OBJ_DIR)/
+	$(CPP) -MM -MF $@ -MP -MT $(patsubst %.d,%.o,$@) $(C_FLAGS) $(CPP_FLAGS) $(patsubst $(OBJ_DIR)/%.d,$(SRC_DIR)/%.c,$@)
+
+$(OBJ_DIR)/%.d: $(NRF_PATH)/%.S
+	@mkdir -p $(OBJ_DIR)/
+	$(CPP) -MM -MF $@ -MP -MT $(patsubst %.d,%.o,$@) $(C_FLAGS) $(CPP_FLAGS) $(patsubst $(OBJ_DIR)/%.d,$(NRF_PATH)/%.S,$@)
+
+$(OBJ_DIR)/%.o: $(SRC_DIR)/%.c
+	@mkdir -p $(OBJ_DIR)/
+	$(CC) -c $(CPP_FLAGS) $(C_FLAGS) $< -o $@
+
+$(OBJ_DIR)/%.o: $(NRF_PATH)/%.c
+	@mkdir -p $(dir $@)
+	$(CC) -std=c99 -MP -MD -c -o $@ $< $(C_FLAGS) $(CPP_FLAGS)
+
+$(OBJ_DIR)/%.o: $(NRF_PATH)/%.S
+	@mkdir -p $(dir $@)
+	$(CC) -c $(ASMFLAGS) $< -o $@
+
+ifneq ($(MAKECMDGOALS),clean)
+-include $(patsubst %.o,%.d,$(OBJS))
+endif
--- a/blinky_gcc_nrf52.ld
+++ b/blinky_gcc_nrf52.ld
@@ -0,0 +1,88 @@
+/* Linker script to configure memory regions. */
+
+SEARCH_DIR(.)
+GROUP(-lgcc -lc -lnosys)
+
+MEMORY
+{
+  FLASH (rx) : ORIGIN = 0x26000, LENGTH = 0x5a000
+  RAM (rwx) :  ORIGIN = 0x20005968, LENGTH = 0xa698
+}
+
+SECTIONS
+{
+}
+
+SECTIONS
+{
+  . = ALIGN(4);
+  .mem_section_dummy_ram :
+  {
+  }
+  .log_dynamic_data :
+  {
+    PROVIDE(__start_log_dynamic_data = .);
+    KEEP(*(SORT(.log_dynamic_data*)))
+    PROVIDE(__stop_log_dynamic_data = .);
+  } > RAM
+  .log_filter_data :
+  {
+    PROVIDE(__start_log_filter_data = .);
+    KEEP(*(SORT(.log_filter_data*)))
+    PROVIDE(__stop_log_filter_data = .);
+  } > RAM
+
+} INSERT AFTER .data;
+
+SECTIONS
+{
+  .mem_section_dummy_rom :
+  {
+  }
+  .sdh_soc_observers :
+  {
+    PROVIDE(__start_sdh_soc_observers = .);
+    KEEP(*(SORT(.sdh_soc_observers*)))
+    PROVIDE(__stop_sdh_soc_observers = .);
+  } > FLASH
+  .sdh_state_observers :
+  {
+    PROVIDE(__start_sdh_state_observers = .);
+    KEEP(*(SORT(.sdh_state_observers*)))
+    PROVIDE(__stop_sdh_state_observers = .);
+  } > FLASH
+  .sdh_stack_observers :
+  {
+    PROVIDE(__start_sdh_stack_observers = .);
+    KEEP(*(SORT(.sdh_stack_observers*)))
+    PROVIDE(__stop_sdh_stack_observers = .);
+  } > FLASH
+  .sdh_req_observers :
+  {
+    PROVIDE(__start_sdh_req_observers = .);
+    KEEP(*(SORT(.sdh_req_observers*)))
+    PROVIDE(__stop_sdh_req_observers = .);
+  } > FLASH
+  .log_const_data :
+  {
+    PROVIDE(__start_log_const_data = .);
+    KEEP(*(SORT(.log_const_data*)))
+    PROVIDE(__stop_log_const_data = .);
+  } > FLASH
+  .log_backends :
+  {
+    PROVIDE(__start_log_backends = .);
+    KEEP(*(SORT(.log_backends*)))
+    PROVIDE(__stop_log_backends = .);
+  } > FLASH
+    .nrf_balloc :
+  {
+    PROVIDE(__start_nrf_balloc = .);
+    KEEP(*(.nrf_balloc))
+    PROVIDE(__stop_nrf_balloc = .);
+  } > FLASH
+
+} INSERT AFTER .text
+
+
+INCLUDE "nrf_common.ld"
--- a/include/sdk_config.h
+++ b/include/sdk_config.h
--- a/interface/driver.h
+++ b/interface/driver.h
@@ -0,0 +1,34 @@
+#ifndef __DRIVER_H__
+#define __DRIVER_H__
+
+#include <stdarg.h>
+
+struct driver;
+
+typedef int (*fp_open_t)(const struct driver *);
+typedef int (*fp_close_t)(const struct driver *);
+typedef int (*fp_read_t)(const struct driver *, char *, unsigned int);
+typedef int (*fp_write_t)(const struct driver *, const char *, unsigned int);
+typedef int (*fp_ioctl_t)(const struct driver *, unsigned int, unsigned int argc, va_list);
+
+struct driver_fp {
+    fp_open_t   open;
+    fp_close_t  close;
+    fp_read_t   read;
+    fp_write_t  write;
+    fp_ioctl_t  ioctl;
+};
+
+struct driver {
+    const char *name;
+    const struct driver_fp *fp;
+    const void *dev;
+};
+
+int drv_open(const struct driver *drv);
+int drv_close(const struct driver *drv);
+int drv_read(const struct driver *drv, char *buffer, unsigned int length);
+int drv_write(const struct driver *drv, const char *buffer, unsigned int length);
+int drv_ioctl(const struct driver *drv, unsigned int cmd, unsigned int argc, ...);
+
+#endif
--- a/nrf_sdk.sh
+++ b/nrf_sdk.sh
@@ -0,0 +1,13 @@
+#!/bin/bash
+
+SDK_FOLDER=nrf5sdk
+SDK_COTAINER=nRF5SDK160098a08e2.zip
+SDK_URL=https://www.nordicsemi.com/-/media/Software-and-other-downloads/SDKs/nRF5/Binaries/$SDK_COTAINER
+
+rm -rf $SDK_FOLDER
+mkdir $SDK_FOLDER
+curl $SDK_URL -o $SDK_FOLDER/$SDK_COTAINER
+cd $SDK_FOLDER
+unzip $SDK_COTAINER
+rm $SDK_COTAINER
+cd -
--- a/src/main.c
+++ b/src/main.c
@@ -0,0 +1,77 @@
+/**
+ * Copyright (c) 2014 - 2019, 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 blinky_example_main main.c
+ * @{
+ * @ingroup blinky_example
+ * @brief Blinky Example Application main file.
+ *
+ * This file contains the source code for a sample application to blink LEDs.
+ *
+ */
+
+#include <stdbool.h>
+#include <stdint.h>
+#include "nrf_delay.h"
+#include "boards.h"
+
+/**
+ * @brief Function for application main entry.
+ */
+int main(void)
+{
+    /* Configure board. */
+    bsp_board_init(BSP_INIT_LEDS);
+
+    /* Toggle LEDs. */
+    while (true)
+    {
+        for (int i = 0; i < 4; i++)
+        {
+            bsp_board_led_invert(i);
+            nrf_delay_ms(500);
+        }
+    }
+}
+
+/**
+ *@}
+ **/