Merge pull request 'Some DHB docs' (#551) from eive/fsfw:mueller/dhb-docs into development

Reviewed-on: fsfw/fsfw#551

README.md

@@ -107,6 +107,42 @@ cmake --build . -- fsfw-tests_coverage -j
 
 The `coverage.py` script located in the `script` folder can also be used to do this conveniently.
 
+## Building the documentations
+
+The FSFW documentation is built using the tools Sphinx, doxygen and breathe based on the
+instructions provided in  [this blogpost](https://devblogs.microsoft.com/cppblog/clear-functional-c-documentation-with-sphinx-breathe-doxygen-cmake/). If you
+want to do this locally, set up the prerequisites first. This requires a ``python3``
+installation as well. Example here is for Ubuntu.
+
+```sh
+sudo apt-get install doxygen graphviz
+```
+
+And the following Python packages
+
+```sh
+python3 -m pip install sphinx breathe
+```
+
+You can set up a documentation build system using the following commands
+
+```sh
+mkdir build-docs && cd build-docs
+cmake -DFSFW_BUILD_DOCS=ON -DFSFW_OSAL=host ..
+```
+
+Then you can generate the documentation using
+
+```sh
+cmake --build . -j
+```
+
+You can find the generated documentation inside the `docs/sphinx` folder inside the build
+folder. Simply open the `index.html` in the webbrowser of your choice.
+
+The `helper.py` script located in the script` folder can also be used to create, build
+and open the documentation conveniently. Try `helper.py -h for more information.
+
 ## Formatting the sources
 
 The formatting is done by the `clang-format` tool. The configuration is contained within the

docs/devicehandlers.rst

@@ -1,3 +1,110 @@
+.. _dhb-prim-doc:
+
 Device Handlers
 ==================
 
+Device handler components represent, control and monitor equipment, for example sensors or actuators
+of a spacecraft or the payload.
+
+Most device handlers have the same common functionality or
+requirements, which are fulfilled by implementing certain interfaces:
+
+- The handler/device needs to be commandable: :cpp:class:`HasActionsIF`
+- The handler needs to communicate with the physical device via a dedicated
+  communication bus, for example SpaceWire, UART or SPI: :cpp:class:`DeviceCommunicationIF`
+- The handler has housekeeping data which has to be exposed to the operator and/or other software
+  components: :cpp:class:`HasLocalDataPoolIF`
+- The handler has configurable parameters: :cpp:class:`ReceivesParameterMessagesIF` which
+  also implements :cpp:class:`HasParametersIF`
+- The handler has health states, for example to indicate a broken device:
+  :cpp:class:`HasHealthIF`
+- The handler has modes. For example there are the core modes `MODE_ON`, `MODE_OFF`
+  and `MODE_NORMAL` provided by the FSFW. `MODE_ON` means that a device is physically powered
+  but that it is not periodically polling data from the
+  physical device, `MODE_NORMAL` means that it is able to do that: :cpp:class:`HasModesIF`
+
+The device handler base therefore provides abstractions for a lot of common
+functionality, which can potentially avoid high amounts or logic and code duplication.
+
+Template Device Handler Base File
+----------------------------------
+
+This is an example template device handler header file with all necessary
+functions implemented:
+
+.. code-block:: cpp
+
+	#ifndef __TESTDEVICEHANDLER_H_
+	#define __TESTDEVICEHANDLER_H_
+
+	#include <fsfw/devicehandlers/DeviceHandlerBase.h>
+
+	class TestDeviceHandler: DeviceHandlerBase {
+	public:
+	  TestDeviceHandler(object_id_t objectId, object_id_t comIF, CookieIF* cookie);
+	private:
+	  void doStartUp() override;
+	  void doShutDown() override;
+	  ReturnValue_t buildNormalDeviceCommand(DeviceCommandId_t* id) override;
+	  ReturnValue_t buildTransitionDeviceCommand(DeviceCommandId_t* id) override;
+	  void fillCommandAndReplyMap() override;
+	  ReturnValue_t buildCommandFromCommand(DeviceCommandId_t deviceCommand, const uint8_t* commandData,
+	                                        size_t commandDataLen) override;
+	  ReturnValue_t scanForReply(const uint8_t* start, size_t remainingSize, DeviceCommandId_t* foundId,
+	                             size_t* foundLen) override;
+	  ReturnValue_t interpretDeviceReply(DeviceCommandId_t id, const uint8_t* packet) override;
+	  uint32_t getTransitionDelayMs(Mode_t modeFrom, Mode_t modeTo) override;
+	  ReturnValue_t initializeLocalDataPool(localpool::DataPool& localDataPoolMap,
+	                                        LocalDataPoolManager& poolManager) override;
+
+	};
+
+	#endif /* __TESTDEVICEHANDLER_H_ */
+
+and the respective source file with sensible default return values:
+
+.. code-block:: cpp
+
+	#include "TestDeviceHandler.h"
+
+	TestDeviceHandler::TestDeviceHandler(object_id_t objectId, object_id_t comIF, CookieIF* cookie)
+	    : DeviceHandlerBase(objectId, comIF, cookie) {}
+
+	void TestDeviceHandler::doStartUp() {}
+
+	void TestDeviceHandler::doShutDown() {}
+
+	ReturnValue_t TestDeviceHandler::buildNormalDeviceCommand(DeviceCommandId_t* id) {
+	  return HasReturnvaluesIF::RETURN_OK;
+	}
+
+	ReturnValue_t TestDeviceHandler::buildTransitionDeviceCommand(DeviceCommandId_t* id) {
+	  return HasReturnvaluesIF::RETURN_OK;
+	}
+
+	void TestDeviceHandler::fillCommandAndReplyMap() {}
+
+	ReturnValue_t TestDeviceHandler::buildCommandFromCommand(DeviceCommandId_t deviceCommand,
+	                                                         const uint8_t* commandData,
+	                                                         size_t commandDataLen) {
+	  return HasReturnvaluesIF::RETURN_OK;
+	}
+
+	ReturnValue_t TestDeviceHandler::scanForReply(const uint8_t* start, size_t remainingSize,
+	                                              DeviceCommandId_t* foundId, size_t* foundLen) {
+	  return HasReturnvaluesIF::RETURN_OK;
+	}
+
+	ReturnValue_t TestDeviceHandler::interpretDeviceReply(DeviceCommandId_t id,
+	                                                      const uint8_t* packet) {
+	  return HasReturnvaluesIF::RETURN_OK;
+	}
+
+	uint32_t TestDeviceHandler::getTransitionDelayMs(Mode_t modeFrom, Mode_t modeTo) {
+	  return 10000;
+	}
+
+	ReturnValue_t TestDeviceHandler::initializeLocalDataPool(localpool::DataPool& localDataPoolMap,
+	                                                         LocalDataPoolManager& poolManager) {
+	  return HasReturnvaluesIF::RETURN_OK;
+	}

docs/getting_started.rst

@@ -90,8 +90,21 @@ Building the documentation
 ----------------------------
 
 The FSFW documentation is built using the tools Sphinx, doxygen and breathe based on the
-instructions provided in `this blogpost <https://devblogs.microsoft.com/cppblog/clear-functional-c-documentation-with-sphinx-breathe-doxygen-cmake/>`_. You can set up a
-documentation build system using the following commands
+instructions provided in `this blogpost <https://devblogs.microsoft.com/cppblog/clear-functional-c-documentation-with-sphinx-breathe-doxygen-cmake/>`_. If you
+want to do this locally, set up the prerequisites first. This requires a ``python3``
+installation as well. Example here is for Ubuntu.
+
+.. code-block:: console
+
+   sudo apt-get install doxygen graphviz
+
+And the following Python packages
+
+.. code-block:: console
+
+   python3 -m pip install sphinx breathe
+
+You can set up a documentation build system using the following commands
 
 .. code-block:: bash
 
@@ -110,6 +123,14 @@ folder. Simply open the ``index.html`` in the webbrowser of your choice.
 The ``helper.py`` script located in the ``script`` folder can also be used to create, build
 and open the documentation conveniently. Try ``helper.py -h`` for more information.
 
+Formatting the source
+-----------------------
+
+The formatting is done by the ``clang-format`` tool. The configuration is contained within the
+``.clang-format`` file in the repository root. As long as ``clang-format`` is installed, you
+can run the ``apply-clang-format.sh`` helper script to format all source files consistently.
+
+
 .. _`Hosted FSFW example`: https://egit.irs.uni-stuttgart.de/fsfw/fsfw-example-hosted
 .. _`Catch2 library`: https://github.com/catchorg/Catch2
 .. _`Code coverage`: https://github.com/bilke/cmake-modules/tree/master

docs/highlevel.rst

@@ -118,7 +118,7 @@ The DH has mechanisms to monitor the communication with the physical device whic
 for FDIR reaction.  Device Handlers can be created by implementing ``DeviceHandlerBase``.
 A standard FDIR component for the DH will be created automatically but can
 be overwritten by the user. More information on DeviceHandlers can be found in the
-related [documentation section](doc/README-devicehandlers.md#top).
+related :ref:`documentation section <dhb-prim-doc>`.
 
 Modes and Health
 --------------------