CAN bus: Difference between revisions
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** Also simple timer-based interface for cyclic RX with failure notification | ** Also simple timer-based interface for cyclic RX with failure notification | ||
===iproute=== | ===[[iproute]]=== | ||
SocketCAN devices, including virtual interfaces (<tt>vcanX</tt>), are configured with the standard <tt>iproute</tt> tool. | SocketCAN devices, including virtual interfaces (<tt>vcanX</tt>), are configured with the standard <tt>iproute</tt> tool. | ||
* Get statistics: <tt>ip -details -statistics link show canX</tt> | * Get statistics: <tt>ip -details -statistics link show canX</tt> | ||
** Alternatively, look at <tt>/proc/net/can/stats</tt> | ** Alternatively, look at <tt>/proc/net/can/stats</tt> | ||
Options for the device include: | Options for the device include: | ||
* <tt>restart-ms</tt>: automatic restart time in milliseconds in the event of bus-off state | * <tt>restart-ms</tt>: automatic restart time in milliseconds in the event of bus-off state (default: disabled) | ||
** <tt>restart</tt> can be used by itself for one-time bus recovery | ** <tt>restart</tt> can be used by itself for one-time bus recovery | ||
** A restart will send an error frame | ** A restart will send an error frame | ||
* <tt>one-shot</tt>: don't attempt to retransmit when we don't see an ACK | * <tt>one-shot</tt>: don't attempt to retransmit when we don't see an ACK (default: disabled) | ||
** Note: when sniffing a <b>non-virtual</b> CAN interface, you must either (a) see an ACK -- requiring a connected device, or (b) be in one-shot mode, or you will not see your transmitted frames | ** Note: when sniffing a <b>non-virtual</b> CAN interface, you must either (a) see an ACK -- requiring a connected device, or (b) be in one-shot mode, or you will not see your transmitted frames | ||
* <tt>bitrate</tt>: bits per second, i.e. "125000". | * <tt>bitrate</tt>: bits per second, i.e. "125000". | ||