MCP2515 for Jetson Nano

Fixes problem on Jetson Nano while attempting to communicate via CAN bus driver (MCP2515). This repo is fork from seeed.

NOTE: It is recommended to reflash your microSD if you did modify the system. Just make sure everything working as intended.

Pin Configuration

MCP2515	Jetson Nano
VCC	5V
GND	GND
CS	24
MISO	21
MOSI	19
SCK	23
INT	31

How to Use

1. Open terminal app at your Jetson Nano
2. Let's clone this repo. To do that, run these commands

   git clone https://github.com/Thor-x86/seeed-linux-dtoverlays
   cd seeed-linux-dtoverlays
   

3. Then build and install with these commands

   make all_jetsonnano
   sudo make install_jetsonnano
   

   NOTE: You'll asked for password to modify the system. It is normal when you type your password but nothing happens. Just type it as usual then hit enter.

4. After that, open utility to configure the Jetson

   sudo /opt/nvidia/jetson-io/jetson-io.py
   

5. Hit up or down arrow to navigate. Make sure Configure Jetson for compatible hardware is highlighted then hit enter.
6. Navigate to MCP251x CAN Controller and hit enter to select
7. Choose Save and reboot to reconfigure pins and hit enter
8. Hit enter again to reboot

Starting Up CAN Driver

1. Open the terminal again, then enter this command

   ip link
   

2. Make sure this word below shown at terminal

   can0: ...
   

   If not shown, possibly the wiring is not connected properly or too loose. Already correct? Then the fix is not working and you have to reflash the micro SD and start over.
3. Now let's configure the bitrate by entering this command

   sudo ip link set can0 type can bitrate <your-bitrate>
   

   Change <your-bitrate> to your intended bitrate in bits unit. As example 125000 for 125kbps.
4. To start the CAN driver, enter this command

   sudo ifconfig can0 up
   

5. To stop the CAN driver, enter this command

   sudo ifconfig can0 down
   

Testing the CAN Driver

• Read data from CAN bus

  candump can0
  

• Send "Hi!" text to CAN bus

  cansend can0 000#48.69.21.00