CAN bus Linux driver - Revision history

JulienB at 09:10, 31 July 2018

2018-07-31T09:10:36Z

2017-07-18T21:40:11Z

‎Automatically launch CAN interface at startup

2017-07-18T21:39:29Z

‎Links

2017-07-13T17:22:45Z

‎Links

2017-07-13T17:19:00Z

‎Usage

2016-06-23T13:40:21Z

OPOS6UL

2016-06-23T12:55:15Z

2015-03-18T14:47:08Z

‎Quick test

2015-03-18T14:44:51Z

‎Usage

2015-03-18T14:40:49Z

@@ Line 55: / Line 55: @@
 </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 :

@@ Line 154: / Line 154: @@
 ==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">
 auto can0

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

@@ Line 158: / Line 158: @@
 * http://ww1.microchip.com/downloads/en/DeviceDoc/21801e.pdf (MCP2515 datasheet)
 * 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:CAN bus]]

@@ Line 31: / Line 31: @@
 ==Usage==
-* Load all the needed drivers:
+* Load all the required drivers (not needed on [[OPOS6UL]]):
 <pre class="apf">
 # modprobe can
@@ Line 39: / Line 39: @@
 {| border="1" cellpadding="10" cellspacing="0" summary="CAN bus modules depending on board" class="wikitable"
 |- style="background:#efefef;" align="center"
-! APF27 & APF51 || APF6 & OPOS6UL
+! APF27 & APF51 || APF6
 |---
 |<pre class="apf">

@@ Line 2: / Line 2: @@
 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==

@@ Line 101: / Line 101: @@
 ==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">
   # ifconfig can0 up
 </pre>
-and can be stopped like that:
+* and can be stopped like that:
 <pre class="apf">
   # ifconfig can0 down
 </pre>
-The socketCAN version can be retrieved like that:
+* The socketCAN version can be retrieved this way:
 <pre class="apf">
   # cat /proc/net/can/version
 </pre>
-The socketCAN statistics can be retrieved like that:
+* The socketCAN statistics can be retrieved this way:
 <pre class="apf">
   # cat /proc/net/can/stats

@@ Line 33: / Line 33: @@
 * Load all the needed drivers:
 <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>
 * Set the bitrate before all operations
 Example: