Dotnet core and ubuntu arm32 development experience

Dotnet core and ubuntu arm32 development experience

1. Select a development board that supports ubuntu and is compatible with wiringPI

2. Installing .Net core On Linux ARM32/64

   Installing .NET Core on Linux ARM64

   The following intructions can be used to install .NET Core on Linux ARM64.

   Pro tip: Check out .NET Core Docker files to determine the exact instructions for installing .NET Core builds, for example .NET Core 3.1 ARM32 SDK Dockerfile .

   Installing .NET Core Globally

   The following instructions install the latest .NET Core globally. It isn't required to do that, but it provides the best experience.

    curl -SL -o dotnet.tar.gz  https://dotnetcli.blob.core.windows.net/dotnet/Sdk/master/dotnet-sdk-latest-linux-arm64.tar.gz sudo mkdir -p /usr/share/dotnet sudo tar -zxf dotnet.tar.gz -C /usr/share/dotnet sudo ln -s /usr/share/dotnet/dotnet /usr/bin/dotnet

   • For ARM32, switch "arm64" to "arm" in the link above.
   • For .NET Core 3.1, you can get the download link @ https://dotnet.microsoft.com/download/dotnet-core/3.1 (look for ARM binaries).

   Dependencies

   .NET Core has the following dependencies, on Ubuntu (other distros will vary):

   • libc6
   • libgcc1
   • libgssapi-krb5-2
   • libicu60
   • liblttng-ust0
   • libssl1.0.0
   • libstdc++6
   • zlib1g

3. Programming

    internal const string WiringOP = "libwiringPi.so"; [DllImport(WiringOP, EntryPoint = "wiringPiSetup",  SetLastError = true)] public static extern int WiringPiSetup(); [DllImport(WiringOP, EntryPoint = "pinModeAlt",  SetLastError = true)] public static extern void PinModeAlt([MarshalAs(UnmanagedType.I4)] Pin pin,  [MarshalAs(UnmanagedType.I4)]IOMode mode); [DllImport(WiringOP, EntryPoint = "pinMode",  SetLastError = true)] public static extern void PinMode([MarshalAs(UnmanagedType.I4)] Pin pin,  [MarshalAs(UnmanagedType.I4)]IOMode mode); [DllImport(WiringOP, EntryPoint = "pullUpDnControl",  SetLastError = true)] public static extern void PullUpDnControl([MarshalAs(UnmanagedType.I4)] Pin pin,  [MarshalAs(UnmanagedType.I4)]Pud pud); [DllImport(WiringOP, EntryPoint = "digitalRead",  SetLastError = true)] [return: MarshalAs(UnmanagedType.I4)] public static extern Level DigitalRead([MarshalAs(UnmanagedType.I4)] Pin pin); [DllImport(WiringOP, EntryPoint = "digitalWrite",  SetLastError = true)] public static extern void DigitalWrite([MarshalAs(UnmanagedType.I4)] Pin pin,  [MarshalAs(UnmanagedType.I4)] Level level);

4. Desktop environment configuration

   • Close the desktop environment

    systemctl set-default multi-user.target

   • Turn on the desktop environment

    systemctl set-default graphical.target

5. Ubuntu 16.04 Configure Auto Start Service

   • Create Service Profile

    vim /etc/systemd/system/test.service [Unit] Description=test service. [Service] Type=simple #ExecStartPre=-cd /root/Published ExecStart=/usr/bin/dotnet /root/Published/test.dll #Working directory WorkingDirectory=/root/Published/ ExecReload=/bin/kill -SIGHUP $MAINPID ExecStop=/bin/kill -SIGINT $MIANPID StandardOutput=file:/root/Published/log.log StandardError=file:/root/Published/err.log [Install] WantedBy=multi-user.target

   • Give permissions to the service profile

    chmod 644 /etc/systemd/system/test.service

   • Configure Startup

    systemctl enable test.service

   • Turn off startup

    systemctl disable test.service

   After the service is modified, use systemctl daemon reload to load the modification

6. View the service running log

   • View through log redirection configured by service
   • adopt journalctl -u test.servcie see
   • If StandardOutput is not set, you can start and redirect through sh ExecStart=/bin/sh 'exec /bin/dotnet /root/Published/test.dll >> /root/Published/test.log 2>&1'