| 1 | = Pacpus tutorials = |
| 2 | |
| 3 | == Foreword == |
| 4 | |
| 5 | Before reading these tutorials, please have a look at the GettingStarted page in order to install the framework. |
| 6 | |
| 7 | The repository containing the tutorials is accessible through the URL in this command: |
| 8 | |
| 9 | {{{ |
| 10 | cd ~ |
| 11 | cd dev/pacpus/ |
| 12 | svn co https://devel.hds.utc.fr/svn/pacpustutorials |
| 13 | }}} |
| 14 | |
| 15 | The repository contains several folders: |
| 16 | - template: you will find here some source codes (CMakeLists.txt, .cpp and .h) useful for the exercises. |
| 17 | - exercises: the wording of each tutorial. |
| 18 | - solutions: the solutions of the exercises (coming soon) |
| 19 | |
| 20 | == Basic Concepts == |
| 21 | |
| 22 | === Tutorial n°1: Creating your first PAPCUS project === |
| 23 | |
| 24 | The objective of this exercise is to understand the build process of a PACPUS project. The utility 'cmake' is used to create the Makefile of the project, and finally we use the GNU Compiler Collection to build the plugins. |
| 25 | |
| 26 | Thanks to the different source codes (.cpp, .h and CMakeLists.txt) in the folder 'template', create a new PACPUS project containing just 1 component. This component may generate a message in the terminal at a user selectable frequency. |
| 27 | |
| 28 | Once you have built your plugin, run it in /opt/pacpus/x.y.z/bin folder with the PacpusSensor executable. |
| 29 | |
| 30 | Indications: |
| 31 | - You can use QTimer to generate the timer. |
| 32 | - A component can be parametrized in a XML file, it might be useful to change the message display frequency. |
| 33 | - The tree of your project may be something like that: |
| 34 | |
| 35 | {{{ |
| 36 | |
| 37 | pacpustutorials |
| 38 | | |
| 39 | |--> exercises |
| 40 | | |
| 41 | |--> exercise_1 |
| 42 | | |
| 43 | |--> CMakeLists.txt |
| 44 | |--> MessageComponent.h |
| 45 | |--> MessageComponent.cpp |
| 46 | | |
| 47 | |--> build |
| 48 | | |
| 49 | |--> build_linux.sh |
| 50 | | |
| 51 | |--> CMakeLists.txt |
| 52 | |
| 53 | }}} |
| 54 | |
| 55 | |
| 56 | === Tutorial n°2: Managing the communication of components === |
| 57 | |
| 58 | |
| 59 | |
| 60 | |
| 61 | ==== Exercise 2.1: communication between components ==== |
| 62 | |
| 63 | |
| 64 | In this exercise we will develop a new component with one input and one output. The component should add a specific number defined as a parameter to the input value and provide the result as output. Before sending the result on the output it must wait for 1 second. The component will print to the terminal the result of the addition too. |
| 65 | |
| 66 | Write the code of this component in a new plugin but use the same pacpus project as the exercise 1. Build and install the plugin in the PACPUS_ROOT/bin folder and execute the plugin with the PacpusSensor application. |
| 67 | |
| 68 | Indication: |
| 69 | - Now, the tree of your project may be something like that: |
| 70 | |
| 71 | {{{ |
| 72 | pacpustutorials |
| 73 | | |
| 74 | |--> exercises |
| 75 | | |
| 76 | |--> exercise_1 |
| 77 | | |
| 78 | |--> CMakeLists.txt |
| 79 | |--> MessageComponent.h |
| 80 | |--> MessageComponent.cpp |
| 81 | | |
| 82 | |--> exercise_2 |
| 83 | | |
| 84 | |--> CMakeLists.txt |
| 85 | |--> AdditionComponent.h |
| 86 | |--> AdditionComponent.cpp |
| 87 | | |
| 88 | |--> build |
| 89 | | |
| 90 | |--> build_linux.sh |
| 91 | | |
| 92 | |--> CMakeLists.txt |
| 93 | }}} |
| 94 | |
| 95 | |
| 96 | ==== Exercise 2.2: communication of variable size data ==== |
| 97 | |
| 98 | Create a new component in the same plugin as the previous one (exercise 2.1). It will have the same functionnality with the difference that it can do an addition on a vector of input values. |
| 99 | |
| 100 | Build, install and run this new component. |
| 101 | |
| 102 | Indication : |
| 103 | - you can use the QVector class as input/output type. |
| 104 | |
| 105 | |
| 106 | |
| 107 | ==== Exercise 2.3: Threaded component ==== |
| 108 | |
| 109 | From the component written in exercise 2.2 create a new component with the same interface. The addition must be done in a separate thread. |
| 110 | |
| 111 | Build, install and run this new component. |
| 112 | |
| 113 | Indication : |
| 114 | - Your component must inherit from the QThread class. |
| 115 | - Take care of the protection of the data to guarantee a thread safe execution. |
| 116 | |
| 117 | |
| 118 | |
| 119 | |
| 120 | == Advanced concepts == |
| 121 | |
| 122 | Soon available... |