Linux LiteX demo ~~~~~~~~~~~~~~~~ This example design features a Linix-capable SoC based around VexRiscv soft CPU. It also includes DDR and Ethernet controllers. To build the litex example, run the following commands: .. code-block:: bash :name: example-litex-deps wget https://raw.githubusercontent.com/enjoy-digital/litex/master/litex_setup.py; chmod +x litex_setup.py; ./litex_setup.py init; ./litex_setup.py install; wget https://static.dev.sifive.com/dev-tools/riscv64-unknown-elf-gcc-8.1.0-2019.01.0-x86_64-linux-ubuntu14.tar.gz; tar -xf riscv64-unknown-elf-gcc-8.1.0-2019.01.0-x86_64-linux-ubuntu14.tar.gz; export PATH=$PATH:$PWD/riscv64-unknown-elf-gcc-8.1.0-2019.01.0-x86_64-linux-ubuntu14/bin/; pushd litex/litex/boards/targets && ./arty.py --toolchain symbiflow --cpu-type vexriscv --build && popd To build the linux-litex-demo example, depending on your hardware, run: .. code-block:: bash :name: example-litex-a35t-group TARGET="arty_35" make -C linux_litex_demo .. code-block:: bash :name: example-litex-a100t-group TARGET="arty_100" make -C linux_litex_demo At completion, the bitstreams are located in the build directory: .. code-block:: bash cd linux_litex_demo/build/ Now you can upload the design with: .. code-block:: bash openocd -f ${INSTALL_DIR}/${FPGA_FAM}/conda/envs/${FPGA_FAM}/share/openocd/scripts/board/digilent_arty.cfg -c "init; pld load 0 top.bit; exit" .. note:: LiteX on Linux demo excepts you to use IPv4 address of ``192.168.100.100/24`` on your network interface. You should observe the following line in the OpenOCD output .. code-block:: bash Info : JTAG tap: xc7.tap tap/device found: 0x0362d093 (mfg: 0x049 (Xilinx), part: 0x362d, ver: 0x0) In the ``picocom`` terminal, you should observe the following output: .. image:: ../../docs/images/linux-example-console.gif :align: center :width: 80% Additionally, two LED's on the board should be turned on .. image:: ../../docs/images/linux-example-arty.jpg :width: 49% :align: center