First, install the Nix package manager. Some distributions provide a package for the Nix package manager, otherwise, it can be installed via the script on the `Nix website <http://nixos.org/nix/>`_. Make sure you get Nix version 2.4 or higher.
The easiest way to obtain ARTIQ is then to install it into the user environment with ``$ nix profile install git+https://github.com/m-labs/artiq.git``. Answer "Yes" to the questions about setting Nix configuration options. This provides a minimal installation of ARTIQ where the usual commands (``artiq_master``, ``artiq_dashboard``, ``artiq_run``, etc.) are available.
This installation is however quite limited, as Nix creates a dedicated Python environment for the ARTIQ commands alone. This means that other useful Python packages that you may want (pandas, matplotlib, ...) are not available to them.
Installing multiple packages and making them visible to the ARTIQ commands requires using the Nix language. Create an empty directory with a file ``flake.nix`` with the following contents:
Then spawn a shell containing the packages with ``$ nix shell``. The ARTIQ commands with all the additional packages should now be available.
You can exit the shell by typing Control-D. The next time ``$ nix shell`` is invoked, Nix uses the cached packages so the shell startup is fast.
You can create directories containing each a ``flake.nix`` that correspond to different sets of packages. If you are familiar with Conda, using Nix in this way is similar to having multiple Conda environments.
If your favorite package is not available with Nix, contact us using the helpdesk@ email.
If the following message displays when running ``nix shell`` or ``nix develop``
::
warning: ignoring untrusted substituter 'https://nixbld.m-labs.hk', you are not a trusted user.
Run `man nix.conf` for more information on the `substituters` configuration option.
and Nix proceeds to build some packages from source, this means that you are using `multi-user mode <https://nixos.org/manual/nix/stable/installation/multi-user>`_ in Nix, for example when Nix is installed via ``pacman`` in Arch Linux.
By default, users accessing Nix in multi-user mode are "unprivileged" and cannot use untrusted substituters. To change this, edit ``/etc/nix/nix.conf`` and add the following line (or append to the key if the key already exists):
::
trusted-substituters = https://nixbld.m-labs.hk
This will add the substituter as a trusted substituter for all users using Nix.
Alternatively, add the following line:
::
trusted-users = <username> # Replace <username> with the user invoking `nix`
This will set your user as a trusted user, allowing the use of any untrusted substituters.
..warning::
Setting users as trusted users will effectively grant root access to those users. See the `Nix documentation <https://nixos.org/manual/nix/stable/command-ref/conf-file#conf-trusted-users>`_ for more information.
Run ``$ nix profile upgrade`` if you installed ARTIQ into your user profile. If you used a ``flake.nix`` shell environment, make a back-up copy of the ``flake.lock`` file to enable rollback, then run ``$ nix flake update`` and re-enter ``$ nix shell``.
Run ``pacman -Syu`` to update all MSYS2 packages including ARTIQ. If you get a message telling you that the shell session must be restarted after a partial update, open the shell again after the partial update and repeat the command. See the MSYS2 and Pacman manual for information on how to update individual packages if required.
If you have purchased a pre-assembled system from M-Labs or QUARTIQ, the gateware and firmware are already flashed and you can skip those steps, unless you want to replace them with a different version of ARTIQ.
With Nix, add ``aqmain.openocd-bscanspi`` to the shell packages.
Be careful not to add ``pkgs.openocd`` instead - this would install OpenOCD from the NixOS package collection, which does not contain the bscanspi bitstreams necessary to flash ARTIQ boards.
On Linux, first ensure that the current user belongs to the ``plugdev`` group (i.e. ``plugdev`` shown when you run ``$ groups``). If it does not, run ``$ sudo adduser $USER plugdev`` and re-login.
If you have an active firmware subscription with M-Labs or QUARTIQ, you can obtain firmware that corresponds to the currently installed version of ARTIQ using AFWS (ARTIQ firmware service). One year of subscription is included with most hardware purchases. You may purchase or extend firmware subscriptions by writing to the sales@ email.
Replace ``[username]`` with the login name that was given to you with the subscription, ``[variant]`` with the name of your system variant, and ``[afws_directory]`` with the name of an empty directory, which will be created by the command if it does not exist. Enter your password when prompted and wait for the build (if applicable) and download to finish. If you experience issues with the AFWS client, write to the helpdesk@ email.
The JTAG adapter is integrated into the Kasli board; for flashing (and debugging) you simply need to connect your computer to the micro-USB connector on the Kasli front panel.
For Kasli, insert a SFP/RJ45 transceiver (normally included with purchases from M-Labs and QUARTIQ) into the SFP0 port and connect it to an Ethernet port in your network. If the port is 10Mbps or 100Mbps and not 1000Mbps, make sure that the SFP/RJ45 transceiver supports the lower rate. Many SFP/RJ45 transceivers only support the 1000Mbps rate. If you do not have a SFP/RJ45 transceiver that supports 10Mbps and 100Mbps rates, you may instead use a gigabit Ethernet switch in the middle to perform rate conversion.
If you purchased a Kasli device from M-Labs, it usually comes with the IP address ``192.168.1.75``. Once you can reach this IP, it can be changed with: ::
Check that you can ping the device. If ping fails, check that the Ethernet link LED is ON - on Kasli, it is the LED next to the SFP0 connector. As a next step, look at the messages emitted on the UART during boot. Use a program such as flterm or PuTTY to connect to the device's serial port at 115200bps 8-N-1 and reboot the device. On Kasli, the serial port is on FTDI channel 2 with v1.1 hardware (with channel 0 being JTAG) and on FTDI channel 1 with v1.0 hardware. Note that on Windows you might need to install the `FTDI drivers <https://ftdichip.com/drivers/>`_ first.
If you want to use IPv6, the device also has a link-local address that corresponds to its EUI-64, and an additional arbitrary IPv6 address can be defined by using the ``ip6`` configuration key. All IPv4 and IPv6 addresses can be used at the same time.
The idle kernel is the kernel (some piece of code running on the core device) which the core device runs whenever it is not connected to a PC via Ethernet.
This kernel is therefore stored in the :ref:`core device configuration flash storage <core-device-flash-storage>`.
To flash the idle kernel, first compile the idle experiment. The idle experiment's ``run()`` method must be a kernel: it must be decorated with the ``@kernel`` decorator (see :ref:`next topic <connecting-to-the-core-device>` for more information about kernels). Since the core device is not connected to the PC, RPCs (calling Python code running on the PC from the kernel) are forbidden in the idle experiment. Then write it into the core device configuration flash storage: ::
The startup kernel is executed once when the core device powers up. It should initialize DDSes, set up TTL directions, etc. Proceed as with the idle kernel, but using the ``startup_kernel`` key in the ``artiq_coremgmt`` command.
For DRTIO systems, the startup kernel should wait until the desired destinations (including local RTIO) are up, using :meth:`artiq.coredevice.Core.get_rtio_destination_status`.
If you are using DRTIO and the default routing table (for a star topology) is not suitable to your needs, prepare and load a different routing table. See :ref:`Using DRTIO <using-drtio>`.
The KC705 may use either an external clock signal, or its internal clock with external frequency or internal crystal reference. The clock is selected at power-up. Setting the RTIO clock source to "ext0_bypass" would bypass the Si5324 synthesiser, requiring that an input clock be present. To select the source, use one of these commands: ::
This feature allows you to print the channels' respective names alongside with their numbers in RTIO error messages. To enable it, run the ``artiq_rtiomap`` tool and write its result into the device config at the ``device_map`` key: ::
