Scheduling of CAN Message Transmission when Multiple FIFOs with Assigned Priorities are Used in RTOS Drivers

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F24%3A00378239" target="_blank" >RIV/68407700:21230/24:00378239 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.can-cia.org/fileadmin/cia/documents/proceedings/2024_lenc_pisa.pdf" target="_blank" >https://www.can-cia.org/fileadmin/cia/documents/proceedings/2024_lenc_pisa.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Scheduling of CAN Message Transmission when Multiple FIFOs with Assigned Priorities are Used in RTOS Drivers

Popis výsledku v původním jazyce

Typical RTOS general-purpose CAN bus subsystems offer interfaces that queue CAN messages for transmission in FIFO order. This leads to bus arbitration priority inversion situations when a critical message is sent after a low-priority one and a bus is fully loaded by another device. This is usually solved by adding FIFOs for different traffic classes. The presented solution allows the dynamic redistribution of a fixed set of CAN controller transmission buffers to these classes. The CTU CAN FD open-source IP core has been chosen as the first supported device because it allows transmission order reassignment of these buffers on the fly. The current work targets an open-source RTEMS executive because it needs a new full- featured CAN/CAN FD stack. The executive is used in satellites and critical applications and CAN bus popularity is rising in these areas. The project builds on the infrastructure designed for LinCAN driver used in GNU/Linux real-time applications for decades, even before SocketCAN. When tested on CTU CAN FD and RTEMS, other RTEMS CAN drivers can be ported to the framework. It can even be used for SocketCAN driver updates when Linux kernel network interface multiple queues are used, as well as for NuttX drivers.

Název v anglickém jazyce

Scheduling of CAN Message Transmission when Multiple FIFOs with Assigned Priorities are Used in RTOS Drivers

Popis výsledku anglicky

Typical RTOS general-purpose CAN bus subsystems offer interfaces that queue CAN messages for transmission in FIFO order. This leads to bus arbitration priority inversion situations when a critical message is sent after a low-priority one and a bus is fully loaded by another device. This is usually solved by adding FIFOs for different traffic classes. The presented solution allows the dynamic redistribution of a fixed set of CAN controller transmission buffers to these classes. The CTU CAN FD open-source IP core has been chosen as the first supported device because it allows transmission order reassignment of these buffers on the fly. The current work targets an open-source RTEMS executive because it needs a new full- featured CAN/CAN FD stack. The executive is used in satellites and critical applications and CAN bus popularity is rising in these areas. The project builds on the infrastructure designed for LinCAN driver used in GNU/Linux real-time applications for decades, even before SocketCAN. When tested on CTU CAN FD and RTEMS, other RTEMS CAN drivers can be ported to the framework. It can even be used for SocketCAN driver updates when Linux kernel network interface multiple queues are used, as well as for NuttX drivers.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

10201 - Computer sciences, information science, bioinformathics (hardware development to be 2.2, social aspect to be 5.8)

Projekt

<a href="/cs/project/TN02000054" target="_blank" >TN02000054: Národní centrum kompetence inženýrství pozemních vozidel Josefa Božka</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů