VAR-SOM-AM43 Can-bus: Difference between revisions

Latest revision as of 14:52, 24 December 2015

VAR-SOM-AM43 - CAN Bus

The AM43 DVK exports two CAN Bus interfaces can0 & can1
For testing CAN Bus:

Short CANL, CANH and GND pins of the 2 CAN Bus interfaces can0, can1 (located on J11).
Type the following into the shell for configuring both CAN bus interfaces:

$ ip link set can0 type can bitrate 50000 triple-sampling on
$ ip link set can0 up
$ ip link set can1 type can bitrate 50000 triple-sampling on
$ ip link set can1 up

Type the following to the shell for testing receiving over can0 interface:

$ candump can0 &

Type the following to the shell for testing sending data packets over can1 interface:

$ cansend can1 0x11 0x22 0x33 0x44 0x55 0x66 0x77 0x88

At this point, can0 interface will receive the data packet sent from can1 interface:

<0x001> [8] 11 22 33 44 55 66 77 88

@@ Line 1: / Line 1: @@
 {{PageHeader|VAR-SOM-AM43 - CAN Bus}} {{DocImage|category1=VAR-SOM-AM43|category2=Yocto}} __toc__
+The AM43 DVK exports two CAN Bus interfaces can0 & can1</br>
-*Connect CANL, CANH and GND pins of two VAR-SOM-AM43 boards (located on J17).
+For testing CAN Bus:
-*Power-up both boards.
+*Short CANL, CANH and GND pins of the 2 CAN Bus interfaces can0, can1 (located on J11).
-*Type the following into the shell of both boards for configuration the CAN bus device:
+*Type the following into the shell for configuring both CAN bus interfaces:
 <pre>$ ip link set can0 type can bitrate 50000 triple-sampling on
 $ ip link set can0 up
+$ ip link set can1 type can bitrate 50000 triple-sampling on
+$ ip link set can1 up
 </pre>
-*Type the following to the shell of board 1 (which is used for testing receiving over can0 device):
+*Type the following to the shell for testing receiving over can0 interface:
-<pre>$ candump can0
+<pre>$ candump can0 &
 </pre>
-*Type the following to the shell of board 2 (which is used for testing sending data packets over can0 device):
+*Type the following to the shell for testing sending data packets over can1 interface:
-<pre>$ cansend can0 0x11 0x22 0x33 0x44 0x55 0x66 0x77 0x88</pre>
+<pre>$ cansend can1 0x11 0x22 0x33 0x44 0x55 0x66 0x77 0x88</pre>
-*At this point, board 1 will receive the data packet sent from board 2:
+*At this point, can0 interface will receive the data packet sent from can1 interface:
 <pre><0x001> [8] 11 22 33 44 55 66 77 88
 </pre>