TS-7670 CAN: Difference between revisions

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The TS-7670 i.MX286 CPU has two FlexCAN ports that use the linux SocketCAN implementation.  The ports can be set up and used with the following commands:
The TS-7670 i.MX286 CPU has two FlexCAN ports that use the linux SocketCAN implementation.  The ports can be set up and used with the following commands:
<source lang="bash">
<source lang="bash">
devmem 0x80018110 32 0x3ff5f5f
#Note that this is only necessary on the October 2, 2013 TS-7670 image.
modprobe flexcan
modprobe flexcan
ifconfig can0 up
ifconfig can0 up
ifconfig can1 up
ifconfig can1 up
</source>
</source><br>
 
In order to set the baud rate of either CAN interface, the interface must first be brought down with:
<source lang="bash">
ifconfig canX down
</source><br>
 
Where "X" is interface 0 or 1. At this point, the desired baud rate can be directly entered in to the file "/sys/devices/platform/FlexCAN.X/bitrate", where X is the desired interface.  For example, to set a baud rate of 750kHz on both interfaces:
<source lang="bash">
echo 750000 > /sys/devices/platform/FlexCAN.0/bitrate
echo 750000 > /sys/devices/platform/FlexCAN.1/bitrate
</source><br>


At this point the ports can be used with standard SocketCAN libraries.  In debian we provide cansend and candump to test the ports or as a simple packet send/recv tool.  In order to test the two ports together, tie CAN_H of both CAN ports together, and do the same for CAN_L.  Then use the following commands:
At this point the ports can be used with standard SocketCAN libraries.  In debian we provide cansend and candump to test the ports or as a simple packet send/recv tool.  In order to test the two ports together, tie CAN_H of both CAN ports together, and do the same for CAN_L.  Then use the following commands:
<source lang="bash">
<source lang="bash">
candump can0 &
candump can0 &
cansend can1 123#DEADBEEF
cansend can1 can1 7DF#03010C
#This command will return
#This command will return
   can0  123 [4] DE AD BE EF
   can0  7DF [3] 03 01 0C
</source>
</source><br>
 
See the [http://developer.berlios.de/projects/socketcan/ SocketCAN] webpage for more information on utilizing SocketCAN.

Latest revision as of 10:28, 20 July 2016

The TS-7670 i.MX286 CPU has two FlexCAN ports that use the linux SocketCAN implementation. The ports can be set up and used with the following commands: 

modprobe flexcan
ifconfig can0 up
ifconfig can1 up


In order to set the baud rate of either CAN interface, the interface must first be brought down with: 

ifconfig canX down


Where "X" is interface 0 or 1. At this point, the desired baud rate can be directly entered in to the file "/sys/devices/platform/FlexCAN.X/bitrate", where X is the desired interface. For example, to set a baud rate of 750kHz on both interfaces: 

echo 750000 > /sys/devices/platform/FlexCAN.0/bitrate
echo 750000 > /sys/devices/platform/FlexCAN.1/bitrate


At this point the ports can be used with standard SocketCAN libraries. In debian we provide cansend and candump to test the ports or as a simple packet send/recv tool. In order to test the two ports together, tie CAN_H of both CAN ports together, and do the same for CAN_L. Then use the following commands: 

candump can0 &
cansend can1 can1 7DF#03010C
#This command will return
  can0  7DF  [3] 03 01 0C


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