TS-7400 V2 CAN

The TS-7400-V2 i.MX286 CPU has two FlexCAN ports that use the linux SocketCAN implementation. Please note that the TS-7400-V2 CAN1 port does not have a CAN transceiver, and CAN0 may or may not have one depending on options ordered with the unit. The ports can be set up and used with the following commands:

#Note that the following devmem command is only necessary on the October 2, 2013 TS-7670/TS-7400-V2 image.
# devmem 0x80018110 32 0x3ff5f5f
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