FELIX firmware and software (including device drivers) are available in open source form under the Apache 2.0 licence.
This page contains links to code repositories and technical documentation.
Practical information can be found in the User Manual.
For any inquiry, please contact us.
Three FELIX PCIe cards have been developed, FLX-712 (PCIe Gen3), FLX-182 (PCIe Gen4) and FLX-155 (PCIe Gen5).
All cards are produced for physics experiments and are not commercially available.
| Card | Production Years | Documents |
|---|---|---|
| FLX-712 | 2019-2020 | Manual, Schematics |
| FLX-182-1B | 2024-2025 | Specification, Schematics |
| FLX-155 | 2026-2027 | N/A |
Firmware source, including build instructions, is available at:
https://gitlab.cern.ch/atlas-tdaq-felix/firmware
Open IP cores used by FELIX are:.
| IP Core | Description | Links |
|---|---|---|
| Wupper | PCIe engine | Source, Documentation |
| Core1990 | Implementation of Interlaken protocol | Repo and Documentation |
Driver source, build instructions and documentation are available at https://gitlab.cern.ch/atlas-tdaq-felix/felix-tdaq-drivers
Software releases are built using the repository
https://gitlab.cern.ch/atlas-tdaq-felix/felix-distribution
FELIX software requires the CVMS file system to be installed on the local host.
The main software packages are listed below.
| Package | Description | Links |
|---|---|---|
| flxcard | Low-level library to interface with the card drivers. | Source, Documentation (HTML, PDF) |
| ftools | Low-level tools. | Source, Documentation in User Manual |
| felix-direct-readout | Simple interface to read out data from FELIX ToHost DMA buffers | Source of implementation, Source of interface |
| felix-star | Suite of applications that interface the FELIX card to the network using the netio3 library | Source, Documentation |
| felix-client | Client library to communicate with felix-star | Source |
| netio3 | Network library front-end implementing data coalescence and publish/subscribe pattern. | Source, Documentation |
| netio3-backend | Network library back-end that provides support for RDMA (libfabric verbs) and TCP/IP (boost asio). | Source, Documentation |
| felix-io | REST web server to remotely access FELIX card registers and I2C devices | Source |
As part of ATLAS operation, FELIX integrates with the TDAQ software infrastructure.
TDAQ software is also open source and can be found at https://gitlab.cern.ch/atlas-tdaq-software
FELIX software releases are independent from ATLAS TDAQ software.