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--- getting_started:write_app:use_on_cb20 [2021/03/24 11:51] – created ursgraf
+++ getting_started:write_app:use_on_cb20 [2023/04/12 15:47] – [Say Hello with EEROS] ursgraf
@@ Line 1: / Line 1: @@
 ====== Writing EEROS Applications for cb20 Board ======
-Back to [[getting_started:install_and_setup_development_environment:use_with_cb20|]].
+Back to [[getting_started:install:use_with_cb20|]].
-Edit the file ''config.sh.in'' as follows
+You will use C++ to develop your EEROS applications. For this you need at least some knowledge of the basic language features. A good starting point might be [[https://www.cplusplus.com/doc/tutorial/]]. Minimal help can also be found under [[tools:cplusplus|]].
-<code>
-use_simulator=false
-use_flink=true
-use_bbblue=false
-use_comedi=false
-use_ros=false
-use_can=false
-use_custom_application=true
-use_cross_compilation_environment=true
-use_ros_setup_script=false
-</code>
-The entry ''use_cross_compilation_environment'' ensures that you compile using an SDK built for the target platform. Make sure to install the SDK by
+What do you want to do next?
-  * downloading the SDK from [[https://wiki.bu.ost.ch/infoportal/software/linux/images/start|Linux Images]]
-  * installing the SDK as described in [[https://wiki.bu.ost.ch/infoportal/software/linux/toradex/toradex-sdk]]
-Edit the file ''config.sh.in'' as follows
+  * [[getting_started:write_app:use_on_cb20#Say Hello with EEROS|]]
-<code>
+  * [[getting_started:write_app:use_on_cb20#Use Existing Project|]]
-environment_setup_script=/opt/tdx-xwayland/5.0.0/environment-setup-armv7at2hf-neon-tdx-linux-gnueabi
+===== Say Hello with EEROS =====
+  - Create a project directory and change into it with <code>
+$ mkdir hello
+$ cd hello
 </code>
-This will guide your make script to use the SDK. Make sure that the above path matches your installation path.
+  - Create a text file "main.cpp" and copy the following code into it <code cpp>
+#include <iostream>
+#include <eeros/logger/Logger.hpp>
+#include <eeros/logger/StreamLogWriter.hpp>
+int main() {
+  using namespace eeros::logger;
+  Logger::setDefaultStreamLogger(std::cout);
+  Logger log = Logger::getLogger();
+  log.info() << "Hello, EEROS";
-If you want to use CAN, choose
+  return 0;
-<code>
+}
-use_can=true
 </code>
+  - Create a text file "CMakeLists.txt" and copy the following text into it: <code cpp>
+cmake_minimum_required(VERSION 3.10)
+project(helloworld)
-Setting the entry ''use_custom_application'' to //true// will fetch an existing application from a git repository. Per default this will will be [[https://github.com/eeros-project/simple-motor-control.git]]. However, you could choose another repository in ''config.sh.in''. Or you could set the entry to //false// if you want to develop your own application. \\
+set(CMAKE_CXX_STANDARD 14)
-Now you can run the ''clone'' script
+find_package(EEROS REQUIRED)
-<code>
+add_executable(helloworld main.cpp)
+target_link_libraries(helloworld PRIVATE eeros)
+</code>
+  - Create a build directory and change into it with <code>
+$ mkdir build-armhf
+$ cd build-armhf
+</code>
+  - Source the script for the SDK which has been installed in [[getting_started:install:use_on_bbb#Install_SDK_on_the_Host|Install SDK on the Host]] with <code>
+$ . ~/ost-devel/1.0/environment-setup-cortexa8hf-neon-poky-linux-gnueabi
+</code> This step has to be done only once. However, you have to repeat it as soon as you open another shell.
+  - Build the project with <code>
+$ cmake ..
+$ make
+</code>
+  - Make changes to "main.cpp", save them and rebuild with <code>
+$ make
+</code> In order to be able to write your own EEROS programs, you could use any text editor. However, we recommend to use an integrated development environment, see [[getting_started:kdevelop|]].
+Continue with [[getting_started:deploy:deploy_cb20|]].
+===== Use Existing Project =====
+As an example we use the [[getting_started:tutorials:oneaxis|]] demo program.
+  - Edit the file ''config.sh.in'' as follows <code>
+custom_application=simple-motor-control
+</code>
+  - Fetch the code of the application with <code>
 $ ./clone.sh
 </code>
+  - Build the project with <code>
+$ ./make.sh
+</code>
+Continue with [[getting_started:deploy:deploy_cb20|]].
-After this you can continue with [[getting_started:compile_eeros|]].
@@ Line 43: / Line 80: @@
 There is a test application for the cb20 board in [[https://github.com/ntb-ch/cb20.git]] under the directory ///Software//. If you wish to use this you can alter ''config.sh.in'' as follows
 <code>
-use_custom_application=true
 custom_application_name=cb20test
 </code>
@@ Line 55: / Line 91: @@
 </code>
-Now you can run the ''clone'' script
+After this you continue as given above in [[getting_started:write_app:use_on_cb20#Use Existing Project|]].
-<code>
-$ ./clone.sh
-</code>
-After this you can continue with [[getting_started:compile_eeros|]].