MILBOX-AGX CANBus Interfaces Tutorial
WHAT YOU WILL LEARN?
1- The pinout of CAN Bus connector
2- Examples of can-utils tools
ENVIRONMENT
Hardware: MILBOX-AGX
In this blog post, we will test the CANBus interfaces of MILBOX-AGX.
The Pinout of CAN Bus Connector
First, let's look over the 42-pin low speed connector (labeled as "X8"). On the connector, there are 4 CAN Bus pins.
Examples of can-utils Tools
To test CAN Bus functionality, we used a DSBOX-TX2NX as a test equipment (It has 120Ω termination resistor included). (If you use a USB-CAN adapter, connect that adapter to the USB port of the host PC and install its driver software if necessary.) To the other side of the connector, connect your device’s CAN pins.
On host side, be sure that you are using same bitrate with your device.
On next step, activate CAN drivers and activate 2 CAN interfaces on MILBOX-AGX with the following commands below:
sudo busybox devmem 0x0c303000 32 0x0000C400
sudo busybox devmem 0x0c303008 32 0x0000C458
sudo busybox devmem 0x0c303010 32 0x0000C400
sudo busybox devmem 0x0c303018 32 0x0000C458
sudo modprobe can
sudo modprobe can_raw
sudo modprobe mttcan
sudo ip link set can0 type can bitrate 500000 dbitrate 2000000 berr-reporting on fd on
sudo ip link set can1 type can bitrate 500000 dbitrate 2000000 berr-reporting on fd on
sudo ip link set up can0
sudo ip link set up can1
Now, you can use can-utils tools to communicate.
Use cangen to write random data from both CAN Bus interface:
cangen can0 -v
cangen can1 -v
Use cansend to write data from both CAN Bus interface:
cansend can0 123#1122334455667788
cansend can1 123#1122334455667788
Use candump to listen bus from both CAN Bus interface:
candump can0
candump can1
Thank you for reading our blog post.
