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What to Install on a Fresh System

  1. Java 11 SDK - see below
  2. IntelliJ - see below
  3. Waveforms - see below
  4. Git - use the git tool in IntelliJ
  5. Maven - use the maven plugin in IntelliJ (Maven Helper)

Java 11

As of 30.01.2019, Ubuntu 10.04 LTS doesn't upgrade to Java 11, so we do it manually. Otherwise we could do it with sudo apt-get install default-jdk if it wasn't already on Java 11.

Download OpenJDK from here

sudo apt-get remove openjdk-*
sudo apt-get purge openjdk-*
sudo apt autoremove

cd /usr/lib
mkdir jdk
cd jdk
sudo tar -xvzf ~/Downloads/openjdk-11.0.2_linux-x64_bin.tar.gz
nano ~/.bashrc

Add to bottom of fine:

export JAVA_HOME=/usr/lib/jdk/jdk-11.0.2
export PATH=$PATH:$JAVA_HOME/bin

Restart Console.

java -version

IntelliJ

Install from Software Center. Search for "Idea". It's packaged as a "snap".

The following did not work. I could not accept the privacy policy as the accept button was greyed out.

Download for Linux and extract zip file from eclipse.org.

cd /opt
sudo tar -xvzf ~/Downloads/ideaIC-2018.3.4-no-jdk.tar.gz
cd /opt/idea-IC-183.5429.30/bin
./idea.sh

Install DWF Framework on Linux

Get .deb files from here: https://reference.digilentinc.com/reference/software/waveforms/waveforms-3/start

sudo mv ~/Downloads/digilent.adept.runtime_2.20.2-amd64.deb /var/cache/apt/archives
cd /var/cache/apt/archives
sudo dpkg -i digilent.adept.runtime_2.20.2-amd64.deb

sudo mv ~/Downloads/digilent.waveforms_3.12.2_amd64.deb /var/cache/apt/archives
cd /var/cache/apt/archives
sudo dpkg -i digilent.waveforms_3.12.2_amd64.deb

Compile Java Code and Generate Header File

Move to project directory

cd ~/path/to/waveforms4j

Manually Compile All Java Classes (skip this if using Eclipse or IntelliJ)

javac src/main/java/org/knowm/waveforms4j/*.java

Take the native methods we've defined in DWF.java and create a header file.

javac -cp ./src/main/java:/home/tim/.m2/repository/org/slf4j/slf4j-api/1.7.25/slf4j-api-1.7.25.jar -h ./c src/main/java/org/knowm/waveforms4j/DWF.java

Note: You need to take those methods created in the header file and implement them in the C++ file.

Building the JNI Library

The following steps outline how to create the JNI library file and put it in the resources folder, which will get bundled with the deployable jar we build later with Maven. The final step is platform dependent, but the first steps are the same.

Linux

You need to find where the Java JNI Headers are located first and use it for the first two -I arguments:

sudo find / -name "jni.h"
find / -name jni_md.h 2> /dev/null
cd ~/Github/waveforms4j/
gcc -Wall -lstdc++ -fPIC -shared -o waveforms4j.so ./c/org_knowm_waveforms4j_DWF.cpp -I/usr/lib/jdk/jdk-11.0.2/include -I/usr/lib/jdk/jdk-11.0.2/include/linux -L/usr/lib -ldwf
mv ./waveforms4j.so ./src/main/resources

C++ Build Tools

gcc: error trying to exec 'cc1plus': execvp: No such file or directory

sudo apt-get update sudo apt-get install --reinstall build-essential

Push Changes

Use Git Cola or the git tools in Eclipse or IntelliJ.