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+# cmake-nRF5x
+
+Cmake script for projects targeting Nordic Semiconductor nRF5x series devices using the GCC toolchain from ARM.
+
+# Dependencies
+
+The script makes use of the following tools:
+
+- nRF5x SDK by Nordic Semiconductor - SoC specific drivers and libraries (also includes a lot of examples)
+- JLink by Segger - interface software for the JLink familiy of programmers
+- nrfjprog by Nordic Semiconductor - Wrapper utility around JLink
+- arm-non-eabi-gcc by ARM and the GCC Team - compiler toolchain for embedded (= bare metal) ARM chips
+
+# Setup
+
+1. Download this repo (or add as submodule) to the directory `cmake-nRF5x` in your project
+
+1. Search the SDK `example` directory for a `sdk_config.h`, `main.c` and a linker script (normally named `<project_name>_gcc_<chip familly>.ld`) that fits your chip and project needs.
+
+1. Copy the `sdk_config.h` and the project `main.c` into a new directory `src`. Modify them as required for your project.
+
+1. Copy the linker script into the root of your project. Rename it to just `gcc_<chip familly>.ld` For example:
+	
+	```
+	gcc_nrf51.ld
+	gcc_nrf52.ld
+	```
+
+1. Create a new `CMakeLists.txt` file at the same level. Add the project standard cmake project header
+
+	A typical file may look like this:
+
+	```
+	cmake_minimum_required(VERSION 3.6)
+
+	set(NRF_TARGET "nrf52")
+	
+	# optional, won't be used if passing toolchain on command line (see below)
+	if (NOT DEFINED ARM_NONE_EABI_TOOLCHAIN_PATH)
+		set(ARM_NONE_EABI_TOOLCHAIN_PATH "/usr/local/bin")
+	endif ()
+	
+	set(NRF5_SDK_PATH "${CMAKE_SOURCE_DIR}/toolchains/nRF5/nRF5_SDK")
+	set(NRFJPROG "${CMAKE_SOURCE_DIR}/toolchains/nRF5/nrfjprog/nrfjprog")
+
+	include("cmake-nRF5x/CMake_nRF5x.cmake")
+
+	# must be called before first project call or add_subdirectory unless passing on command line
+	nRF5x_toolchainSetup()
+
+	project(YourProjectName C ASM)
+	
+	nRF5x_setup()
+
+	nRF5x_addAppScheduler()
+	nRF5x_addAppFIFO()
+	nRF5x_addAppTimer()
+	nRF5x_addAppUART()
+	nRF5x_addAppButton()
+	nRF5x_addBSP(TRUE FALSE FALSE)
+	nRF5x_addBLEGATT()
+
+
+	nRF5x_addBLEService(ble_bas)
+
+	add_definitions(-DCONFIG_GPIO_AS_PINRESET)
+			
+	include_directories("./src")
+	list(APPEND SOURCE_FILES "./src/main.c")
+
+	nRF5x_addExecutable(${PROJECT_NAME} "${SOURCE_FILES}")
+	```
+
+	Adjust as needed for your project.
+
+	_Note_: you can add `CXX` between `C ASM` to add c++ support
+	
+1. Optionally add additional libraries:
+
+	Only the most common drivers and libraries are wrapped with cmake macros.
+
+	To include BLE services, use `nRF5x_addBLEService(<service name>)`.
+
+	For other SDK libraries you can use `include_directories` and `list(APPEND SDK_SOURCE_FILES ...)` to add them. For example:
+
+	```cmake
+	include_directories(
+	        "${NRF5_SDK_PATH}/<library header directory path>"
+	)
+		
+	list(APPEND SDK_SOURCE_FILES
+	        "${NRF5_SDK_PATH}/<library source file path>"
+	)
+	```
+	
+
+# Build
+
+After setup you can use cmake as usual:
+
+1. Generate the actual build files (out-of-source builds are strongly recomended):
+
+	```commandline
+	cmake -H. -B"cmake-build" -G "Unix Makefiles"
+	```
+	You can optionally pass the toolchain to `cmake` when configuring:
+    ```
+    -DCMAKE_TOOLCHAIN_PATH=cmake-nRF5x/arm-gcc-toolchain.cmake
+    ```
+    but if you do so you must ensure the toolchain binaries are available in your environment PATH (i.e. work on the command line without specifying absolute path)
+
+2. Build your app:
+
+	```commandline
+	cmake --build "cmake-build" --target <your project name>
+	```
+
+# Flash
+
+In addition to the build target (named like your project) the script adds some support targets:
+
+`FLASH_SOFTDEVICE` To flash a nRF softdevice to the SoC (typically done only once for each SoC)
+
+```commandline
+cmake --build "cmake-build" --target FLASH_SOFTDEVICE
+```
+
+`FLASH_<your project name>` To flash your application (this will also rebuild your App first)
+
+```commandline
+cmake --build "cmake-build" --target FLASH_<your project name>
+```
+
+`FLASH_ERASE` To completely erase the SoC flash
+
+```commandline
+cmake --build "cmake-build" --target FLASH_ERASE
+```
+
+# JLink Applications
+
+To start the gdb server and RTT terminal, build the target `START_JLINK`:
+
+```commandline
+cmake --build "cmake-build" --target START_JLINK
+```
+
+# License
+
+MIT for the `CMake_nRF5x.cmake` file. 
+
+Please note that the nRF5x SDK by Nordic Semiconductor is covered by it's own license and shouldn't be re-distributed.