CAN bus Linux driver - Revision history

JulienB: /* Quick test */

2026-03-26T14:26:05Z

Quick test

← Older revision		Revision as of 16:26, 26 March 2026
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	==Quick test==		==Quick test==
	* Once the driver is installed and the bitrate is set, the CAN interface has to be started like a standard net interface:		* Once the driver is installed and the bitrate is set, the CAN interface has to be started like a standard net interface (be sure to have previously setup bitrate cf above):
	<pre class="apf">		<pre class="apf">
	# ifconfig can0 up		# ifconfig can0 up or ip link set can0 up
	</pre>		</pre>
	* and can be stopped like that:		* and can be stopped like that:
	<pre class="apf">		<pre class="apf">
	# ifconfig can0 down		# ifconfig can0 down or ip link set can0 down
	</pre>		</pre>
	* The socketCAN version can be retrieved this way:		* The socketCAN version can be retrieved this way:

2018-07-31T09:10:36Z

← Older revision		Revision as of 11:10, 31 July 2018
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	</pre>		</pre>

	{{Note\| An error occurs when you try to set the bitrate with an old Linux kernel. }}		{{Note\| An error occurs when you try to set the bitrate with an old Linux kernel. In that case, ''echo 125000 > /sys/devices/platform/FlexCAN.0/bitrate'' was reported to be a good alternative.}}

	* If the following error occurs when you do the last instruction :		* If the following error occurs when you do the last instruction :

2017-07-18T21:40:11Z

Automatically launch CAN interface at startup

← Older revision		Revision as of 23:40, 18 July 2017
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	==Automatically launch CAN interface at startup==		==Automatically launch CAN interface at startup==
	* Add the following lines to /etc/network/interfaces configuration file:		* Add the following lines to ''/etc/network/interfaces'' configuration file:
	<pre class="APF">		<pre class="APF">
	auto can0		auto can0

2017-07-18T21:39:29Z

Links

@@ Line 152: / Line 152: @@
 </pre>
 then, reflash your rootfs.
 ==Links==

2017-07-13T17:22:45Z

Links

← Older revision		Revision as of 19:22, 13 July 2017
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	* http://ww1.microchip.com/downloads/en/DeviceDoc/21801e.pdf (MCP2515 datasheet)		* http://ww1.microchip.com/downloads/en/DeviceDoc/21801e.pdf (MCP2515 datasheet)
	* http://www.kvaser.com/can/protocol/index.htm (CAN introduction)		* http://www.kvaser.com/can/protocol/index.htm (CAN introduction)
	* ~~http://www.armadeus.com/wiki/index.php?title=~~User:KevinJ#Communication_with_the_CAN_Bus_of_a_car (Communication with a car CAN bus)		* [[User:KevinJ#Communication_with_the_CAN_Bus_of_a_car\|Communication with a car's CAN bus]]

	[[Category:Linux drivers]]		[[Category:Linux drivers]]
	[[Category:CAN bus]]		[[Category:CAN bus]]

2017-07-13T17:19:00Z

Usage

← Older revision		Revision as of 19:19, 13 July 2017
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	==Usage==		==Usage==
	* Load all the needed ~~drivers~~:		* Load all the required drivers (not needed on [[OPOS6UL]]):
	<pre class="apf">		<pre class="apf">
	# modprobe can		# modprobe can
Line 39:		Line 39:
	{\| border="1" cellpadding="10" cellspacing="0" summary="CAN bus modules depending on board" class="wikitable"		{\| border="1" cellpadding="10" cellspacing="0" summary="CAN bus modules depending on board" class="wikitable"
	\|- style="background:#efefef;" align="center"		\|- style="background:#efefef;" align="center"
	! APF27 & APF51 \|\| APF6 ~~& OPOS6UL~~		! APF27 & APF51 \|\| APF6
	\|---		\|---
	\|<pre class="apf">		\|<pre class="apf">

2016-06-23T13:40:21Z

OPOS6UL

← Older revision		Revision as of 15:40, 23 June 2016
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	==Driver installation==		==Driver installation==
	* Nothing has to be done for the [[APF51Dev]], the [[APF28Dev]] and the [[~~APF6Dev~~]].		* Nothing has to be done for the [[APF51Dev]], the [[APF28Dev]], [[APF6Dev]] and the [[OPOS6ULDev]].
	* For the [[APF27Dev\|APF27DevFull]]:		* For the [[APF27Dev\|APF27DevFull]]:
	<pre class="host">		<pre class="host">
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	{\| border="1" cellpadding="10" cellspacing="0" summary="CAN bus modules depending on board" class="wikitable"		{\| border="1" cellpadding="10" cellspacing="0" summary="CAN bus modules depending on board" class="wikitable"
	\|- style="background:#efefef;" align="center"		\|- style="background:#efefef;" align="center"
	! APF27 & APF51 \|\| APF6		! APF27 & APF51 \|\| APF6 & OPOS6UL
	\|---		\|---
	\|<pre class="apf">		\|<pre class="apf">

2016-06-23T12:55:15Z

← Older revision		Revision as of 14:55, 23 June 2016
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	SocketCAN is based on the Linux socket. Further details can be found on the links at the bottom of this page.		SocketCAN is based on the Linux socket. Further details can be found on the links at the bottom of this page.

	{{Warning\| Please ensure that you use a recent version of armadeus BSP (kernel version >= 2.6.38 is required) before trying the instructions described on this page ! With older kernel versions you may not be able to change the bitrate.}}		{{Warning\|Please ensure that you use a recent version of armadeus BSP (kernel version more than 2.6.38 is required) before trying the instructions described on this page! With older kernel versions you may not be able to change the bitrate.}}

	==Driver installation==		==Driver installation==

2015-03-18T14:47:08Z

Quick test

← Older revision		Revision as of 16:47, 18 March 2015
Line 101:		Line 101:

	==Quick test==		==Quick test==
	Once the driver installed and the bitrate is set, the CAN interface has to be started like a standard net interface		* Once the driver is installed and the bitrate is set, the CAN interface has to be started like a standard net interface:
	<pre class="apf">		<pre class="apf">
	# ifconfig can0 up		# ifconfig can0 up
	</pre>		</pre>
	and can be stopped like that:		* and can be stopped like that:
	<pre class="apf">		<pre class="apf">
	# ifconfig can0 down		# ifconfig can0 down
	</pre>		</pre>
	The socketCAN version can be retrieved ~~like that~~:		* The socketCAN version can be retrieved this way:
	<pre class="apf">		<pre class="apf">
	# cat /proc/net/can/version		# cat /proc/net/can/version
	</pre>		</pre>
	The socketCAN statistics can be retrieved ~~like that~~:		* The socketCAN statistics can be retrieved this way:
	<pre class="apf">		<pre class="apf">
	# cat /proc/net/can/stats		# cat /proc/net/can/stats

2015-03-18T14:44:51Z

Usage

← Older revision		Revision as of 16:44, 18 March 2015
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	* Load all the needed drivers:		* Load all the needed drivers:
	<pre class="apf">		<pre class="apf">
	modprobe can		# modprobe can
	modprobe can-dev		# modprobe can-dev
	modprobe can-raw		# modprobe can-raw
	~~modprobe mcp251x # on APF27 & APF51 only~~
	~~modprobe flexcan # on APF6 only~~
	</pre>		</pre>
			{\| border="1" cellpadding="10" cellspacing="0" summary="CAN bus modules depending on board" class="wikitable"
			\|- style="background:#efefef;" align="center"
			! APF27 & APF51 \|\| APF6
			\|---
			\|<pre class="apf">
			# modprobe mcp251x
			</pre>
			\|<pre class="apf">
			# modprobe flexcan
			</pre>
			\|}
	* Set the bitrate before all operations		* Set the bitrate before all operations
	Example:		Example: