artiq/doc/manual/developing.rst

Developing ARTIQ
^^^^^^^^^^^^^^^^

We describe two different approaches to creating a development environment for ARTIQ.

The first method uses existing pre-compiled Anaconda packages for the development environment.
This is fast and convenient because it avoids compiling the entire toolchain but developing individual components within the toolchain requires extra care.
It is completely sufficient to develop and tweak the ARTIQ code and to build
bitstreams.
Some ARTIQ developers as well as the buildbot employs this method for continuous integration to build the ``artiq`` Anaconda packages and the bitstreams.

The second method builds most components in the toolchain from their sources.
This takes time and and care to reproduce precisely but it gives absolute control over the components and an immediate handle at developing them.
Some ARTIQ developers use this method.
It is only recommended for developers and advanced users.

.. _develop-from-conda:

ARTIQ Anaconda development environment
======================================

    1. Install ``git`` as recommended for your operating system and distribution.
    2. Obtain ARTIQ::

           $ git clone --recursive https://github.com/m-labs/artiq ~/artiq-dev/artiq
           $ cd ~/artiq-dev/artiq
       Add ``-b release-X`` to the ``git clone`` command if you are building a stable branch of ARTIQ (the default will fetch the development ``master`` branch).
    3. :ref:`Install Anaconda or Miniconda <install-anaconda>`
    4. Create and activate a conda environment named ``artiq-dev`` and install the ``artiq-dev`` package which pulls in all the packages required to develop ARTIQ::

           $ conda env create -f conda/artiq-dev.yaml
           $ source activate artiq-dev
    5. Add the ARTIQ source tree to the environment's search path::

           $ python setup.py develop
    6. :ref:`Install Xilinx ISE or Vivado <install-xilinx>`
    7. :ref:`Obtain and install the JTAG SPI flash proxy bitstream <install-bscan-spi>`
    8. :ref:`Configure OpenOCD <setup-openocd>`
    9. :ref:`Build target binaries <build-target-binaries>`

.. _install-from-source:

Installing ARTIQ from source
============================

Preparing the build environment for the core device
---------------------------------------------------

These steps are required to generate code that can run on the core
device. They are necessary both for building the MiSoC BIOS
and the ARTIQ kernels.

* Install required host packages: ::

        $ sudo apt-get install python3.5 pip3 build-essential cmake cargo

* Create a development directory: ::

        $ mkdir ~/artiq-dev

* Clone ARTIQ repository: ::

        $ cd ~/artiq-dev
        $ git clone --recursive https://github.com/m-labs/artiq
    
    Add ``-b release-X`` to the ``git clone`` command if you are building a stable branch of ARTIQ (the default will fetch the development ``master`` branch).

* Install OpenRISC binutils (or1k-linux-...): ::

        $ cd ~/artiq-dev
        $ wget https://ftp.gnu.org/gnu/binutils/binutils-2.27.tar.bz2
        $ tar xvf binutils-2.27.tar.bz2
        $ cd binutils-2.27
        $ curl -L 'https://raw.githubusercontent.com/m-labs/conda-recipes/c3effbc26e96c6e246d6e8035f8a07bc52d8ded1/conda/binutils-or1k-linux/fix-R_OR1K_GOTOFF-relocations.patch' | patch -p1

        $ mkdir build
        $ cd build
        $ ../configure --target=or1k-linux --prefix=/usr/local
        $ make -j4
        $ sudo make install

.. note::
    We're using an ``or1k-linux`` target because it is necessary to enable
    shared library support in ``ld``, not because Linux is involved.

* Install LLVM and Clang: ::

        $ cd ~/artiq-dev
        $ git clone -b artiq-3.9 https://github.com/m-labs/llvm-or1k
        $ cd llvm-or1k
        $ git clone -b artiq-3.9 https://github.com/m-labs/clang-or1k tools/clang

        $ mkdir build
        $ cd build
        $ cmake .. -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/usr/local/llvm-or1k -DLLVM_TARGETS_TO_BUILD="OR1K;X86" -DLLVM_ENABLE_ASSERTIONS=ON -DLLVM_INSTALL_UTILS=ON
        $ make -j4
        $ sudo make install

* Install Rust: ::

        $ cd ~/artiq-dev
        $ git clone -b artiq-1.16.0 https://github.com/m-labs/rust
        $ cd rust
        $ git submodule update --init
        $ mkdir build
        $ cd build
        $ ../configure --prefix=/usr/local/rust-or1k --llvm-root=/usr/local/llvm-or1k --disable-manage-submodules
        $ sudo make install -j4

        $ libs="libcore liballoc libstd_unicode libcollections liblibc_mini libunwind"
        $ rustc="/usr/local/rust-or1k/bin/rustc --target or1k-unknown-none -g -C target-feature=+mul,+div,+ffl1,+cmov,+addc -C opt-level=s -L ."
        $ destdir="/usr/local/rust-or1k/lib/rustlib/or1k-unknown-none/lib/"
        $ mkdir ../build-or1k
        $ cd ../build-or1k
        $ for lib in ${libs}; do ${rustc} ../src/${lib}/lib.rs; done
        $ ${rustc} -Cpanic=abort ../src/libpanic_abort/lib.rs
        $ ${rustc} -Cpanic=unwind ../src/libpanic_unwind/lib.rs --cfg llvm_libunwind
        $ sudo mkdir -p ${destdir}
        $ sudo cp *.rlib ${destdir}

.. note::
    Compilation of LLVM can take more than 30 min on some machines. Compilation of Rust can take more than two hours.

Preparing the core device FPGA board
------------------------------------

These steps are required to generate gateware bitstream (``.bit``) files, build the MiSoC BIOS and ARTIQ runtime, and flash FPGA boards. If the board is already flashed, you may skip those steps and go directly to `Installing the host-side software`.

.. _install-xilinx:

* Install the FPGA vendor tools (i.e. Xilinx ISE and/or Vivado):

    * Get Xilinx tools from http://www.xilinx.com/support/download/index.htm. ISE can build gateware bitstreams both for boards using the Spartan-6 (Pipistrello) and 7-series devices (KC705), while Vivado supports only boards using 7-series devices.

    * The Pipistrello is supported by Webpack, the KC705 is not.

    * During the Xilinx toolchain installation, uncheck ``Install cable drivers`` (they are not required as we use better and open source alternatives).

* Install Migen: ::

        $ cd ~/artiq-dev
        $ git clone https://github.com/m-labs/migen
        $ cd migen
        $ python3 setup.py develop --user

.. note::
    The options ``develop`` and ``--user`` are for setup.py to install Migen in ``~/.local/lib/python3.5``.

.. _install-bscan-spi:

* Install the required flash proxy gateware bitstreams:

    The purpose of the flash proxy gateware bitstream is to give programming software fast JTAG access to the flash connected to the FPGA.

    * Pipistrello and KC705:

        ::

            $ cd ~/artiq-dev
            $ wget https://raw.githubusercontent.com/jordens/bscan_spi_bitstreams/master/bscan_spi_xc7k325t.bit
            $ wget https://raw.githubusercontent.com/jordens/bscan_spi_bitstreams/master/bscan_spi_xc6slx45.bit

        Then move both files ``~/artiq-dev/bscan_spi_xc6slx45.bit`` and ``~/artiq-dev/bscan_spi_xc7k325t.bit`` to ``~/.migen``, ``/usr/local/share/migen``, or ``/usr/share/migen``.

* :ref:`Download and install OpenOCD <install-openocd>`.

* Download and install ``asyncserial``: ::

        $ cd ~/artiq-dev
        $ git clone https://www.github.com/m-labs/asyncserial
        $ cd asyncserial
        $ python3 setup.py develop --user

* Download and install MiSoC: ::

        $ cd ~/artiq-dev
        $ git clone --recursive https://github.com/m-labs/misoc
        $ cd misoc
        $ python3 setup.py develop --user

* Download and install ``pythonparser``: ::

        $ cd ~/artiq-dev
        $ git clone https://www.github.com/m-labs/pythonparser
        $ cd pythonparser
        $ python3 setup.py develop --user

* Download and install ARTIQ: ::

        $ cd ~/artiq-dev
        $ git clone --recursive https://github.com/m-labs/artiq
        $ cd artiq
        $ python3 setup.py develop --user

.. note::
    If you have any trouble during ARTIQ setup about ``pygit2`` installation,
    refer to the section dealing with
    :ref:`installing the host-side software <installing-the-host-side-software>`.


* Build the gateware bitstream, BIOS and runtime by running:
    ::

        $ cd ~/artiq-dev
        $ export PATH=/usr/local/llvm-or1k/bin:$PATH

    .. note:: Make sure that ``/usr/local/llvm-or1k/bin`` is first in your ``PATH``, so that the ``clang`` command you just built is found instead of the system one, if any.

.. _build-target-binaries:

    * For Pipistrello::

        $ python3 -m artiq.gateware.targets.pipistrello

    * For KC705::

        $ python3 -m artiq.gateware.targets.kc705_dds -H nist_clock # or nist_qc2

    .. note:: Add ``--toolchain ise`` if you wish to use ISE instead of Vivado.

* Then, gather the binaries and flash them: ::

        $ mkdir binaries
        $ cp misoc_nist_qcX_<board>/gateware/top.bit binaries
        $ cp misoc_nist_qcX_<board>/software/bios/bios.bin binaries
        $ cp misoc_nist_qcX_<board>/software/runtime/runtime.fbi binaries
        $ cd binaries
        $ artiq_flash -d . -t <board>

.. note:: The `-t` option specifies the board your are targeting. Available options are ``kc705`` and ``pipistrello``.

* Check that the board boots by running a serial terminal program (you may need to press its FPGA reconfiguration button or power-cycle it to load the gateware bitstream that was newly written into the flash): ::

        $ flterm /dev/ttyUSB1
        MiSoC BIOS   http://m-labs.hk
        [...]
        Booting from flash...
        Loading xxxxx bytes from flash...
        Executing booted program.
        ARTIQ runtime built <date/time>

.. note:: flterm is part of MiSoC. If you installed MiSoC with ``setup.py develop --user``, the flterm launcher is in ``~/.local/bin``.

The communication parameters are 115200 8-N-1. Ensure that your user has access
to the serial device (``sudo adduser $USER dialout`` assuming standard setup).

.. _installing-the-host-side-software:

Installing the host-side software
---------------------------------

* Install the llvmlite Python bindings: ::

        $ cd ~/artiq-dev
        $ git clone https://github.com/m-labs/llvmlite
        $ cd llvmlite
        $ git checkout artiq-3.9
        $ LLVM_CONFIG=/usr/local/llvm-or1k/bin/llvm-config python3 setup.py install --user

* Install ARTIQ: ::

        $ cd ~/artiq-dev
        $ git clone --recursive https://github.com/m-labs/artiq # if not already done
        $ cd artiq
        $ python3 setup.py develop --user

.. note::
    If you have any trouble during ARTIQ setup about ``pygit2`` installation,
    you can install it by using ``pip``:

    On Ubuntu 14.04::

        $ python3 `which pip3` install --user pygit2==0.19.1

    On Ubuntu 14.10::

        $ python3 `which pip3` install --user pygit2==0.20.3

    On Ubuntu 15.04 and 15.10::

        $ python3 `which pip3` install --user pygit2==0.22.1

    On Ubuntu 16.04::

        $ python3 `which pip3` install --user pygit2==0.24.1

    The rationale behind this is that pygit2 and libgit2 must have the same
    major.minor version numbers.

    See http://www.pygit2.org/install.html#version-numbers

* Build the documentation: ::

        $ cd ~/artiq-dev/artiq/doc/manual
        $ make html