SK Pang Electronics RSP-PICAN FD DUO ISO User manual

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!PiCAN FD DUO ISO Rev B 1.0
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SK Pang Electronics Ltd Ó 2022
www.skpang.co.uk
1
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Product name PICAN FD Duo Isolated CAN-Bus Board for Raspberry Pi 4
Model number RSP-PICAN FD DUO ISO
Manufacturer SK Pang Electronics Ltd
PiCAN FD DUO Isolated
USER GUIDE V1.0

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!PiCAN FD DUO ISO Rev B 1.0
!
SK Pang Electronics Ltd Ó 2022
www.skpang.co.uk
2
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Contents
Table of Contents
1.!Introduction ........................................................................................................... 3!
1.1.!Features*.............................................................................................................................................................*3!
2.!Hardware Installation ............................................................................................. 3!
1.2.!Plug-in*Screw*Terminals*............................................................................................................................*4!
1.3.!120W*Terminator*..........................................................................................................................................*4!
1.4.!LED*.......................................................................................................................................................................*4!
3.!Software Installation .............................................................................................. 4!
1.5.!Installing*CAN*Utils*.......................................................................................................................................*5!
1.6.!Bring*Up*the*Interface*.................................................................................................................................*5!
4.!Python Installation and Use .................................................................................... 6!
!
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!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!PiCAN FD DUO ISO Rev B 1.0
!
SK Pang Electronics Ltd Ó 2022
www.skpang.co.uk
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1. Introduction
This!PiCAN!FD!Duo!Isolated!board!provide!two!channel!CAN-Bus!FD!capability!for!the!
Raspberry!Pi.!It!uses!the!Microchip!MCP2518FD!CAN!controller!with!Analog!Devices!
ADM3055!Isolated!CAN!transceiver.!Connection!are!made!via!4!way!plug-in!screw!
terminal.!The!two!channel!are!independently!isolated.!
The!improved!CAN!FD!extends!the!length!of!the!data!section!to!up!to!64!bytes!per!
frame!and!a!data!rate!of!up!to!8!Mbps.!
Easy!to!install!SocketCAN!driver.!Programming!can!be!done!in!C!or!Python.!
1.1. Features
• Microchip!MCP2518FD!CAN!Controller!
• Analog!Devices!ADM3055!Isolated!CAN!transceiver!
• Reinforced!galvanic!isolation!
• Arbitration!Bit!Rate!upto!1Mbps!
• Data!Bit!Rate!up!to!8Mbps!
• CAN!FD!Controller!modes!
• Mixed!CAN2.0B!and!CANFD!mode!
• CAN2.0B!mode!
• Conforms!to!ISO11898-1:2015!
• High!speed!SPI!Interface!!
• CAN!connection!via!4way!plug-in!screw!terminal!
• 120Ω!terminator!ready!
• LED!indicator!
• Four!fixing!holes,!comply!with!Pi!Hat!standard!
• SocketCAN!driver,!appears!as!can0!and!can1!to!application!
• Interrupt!RX!on!GPIO25!and!05!
2. Hardware Installation
Before!installing!the!board!make!sure!the!Raspberry!is!switched!off.!Carefully!align!
the!40way!connector!on!top!of!the!Pi.!Use!spacer!and!screw!(optional!items)!to!secure!
the!board.!
!

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!PiCAN FD DUO ISO Rev B 1.0
!
SK Pang Electronics Ltd Ó 2022
www.skpang.co.uk
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1.2. Plug-in Screw Terminals
The!CAN!connections!are!made!via!the!4way!plug-in!screw!terminals.!
! !
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!
!
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!!!
1.3. 120
W
Terminator
There!is!a!120W!fitted!to!the!board.!To!use!the!terminator!solder!a!2way!header!pin!to!
JP1!and!JP2!then!insert!a!jumper.!
1.4. LED
There!is!a!red!LED!fitted!to!each!channel.!This!is!connected!to!GPIO04!and!GPIO26.!
!
3. Software Installation
It!is!best!to!start!with!a!brand!new!Raspbian!image.!Download!the!latest!from:!
https://www.raspberrypi.org/downloads/raspbian/!
After!first!time!boot!up,!do!an!update!and!upgrade!first.!
sudo apt-get update
sudo apt-get upgrade
sudo reboot
!
Add!the!overlays!by:!
J1#
Function#
1!
CAN_L!
2!
CAN_H!
3!
GND!
4!
n/c!
J2#
Function#
1!
CAN_L!
2!
CAN_H!
3!
GND!
4!
n/c!

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!PiCAN FD DUO ISO Rev B 1.0
!
SK Pang Electronics Ltd Ó 2022
www.skpang.co.uk
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!
sudo nano /boot/config.txt
Add!these!lines!to!the!end!of!file:!
dtparam=spi=on
dtoverlay=mcp251xfd,spi0-0,interrupt=25
dtoverlay=mcp251xfd,spi0-1,interrupt=05
Reboot!Pi:!
sudo reboot
1.5. Installing CAN Utils
Install!the!CAN!utils!by:!
sudo apt-get install can-utils
1.6. Bring Up the Interface
You!can!now!bring!the!CAN!interface!up!with!CAN!2.0B!at!500kbps:!
sudo /sbin/ip link set can0 up type can bitrate 500000
or!CAN!FD!at!500kpbs!/!2Mbps.!Use!copy!and!paste!to!a!terminal.!
sudo /sbin/ip link set can0 up type can bitrate 500000 dbitrate 2000000 fd on sample-point .7 dsample-point .7
Connect!the!PiCAN!FD!Duo!ISO!to!your!CAN!network!via!plug-in!screw!terminal.!
To!send!a!CAN!2.0!message!use!:!
cansend can0 7DF#0201050000000000
This!will!send!a!CAN!ID!of!7DF.!Data!02!01!05!–!coolant!temperature!request.!
To!send!a!CAN!FD!message!with!BRS!use!:!
cansend can0 7df##15555555555555555
To!send!a!CAN!FD!message!with!no!BRS!use!:!
cansend can0 7df##05555555555555555
Connect!the!PiCAN!to!a!CAN-bus!network!and!monitor!traffic!by!using!command:!
candump can0

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!PiCAN FD DUO ISO Rev B 1.0
!
SK Pang Electronics Ltd Ó 2022
www.skpang.co.uk
6
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You!should!see!something!like!this:
To!use!the!other!CAN!channel!replace!can0!with!can1.!
4. Python Installation and Use
Ensure!the!driver!for!PiCAN!FD!is!installed!and!working!correctly!first.!
Clone!the!pythonCan!repository!by:!
git clone https://github.com/hardbyte/python-can
cd python-can
sudo python3 setup.py install
Check!there!is!no!error!been!displayed.!
Bring!up!the!can0!interface:!
sudo /sbin/ip link set can0 up type can bitrate 500000 dbitrate 2000000 fd on sample-point .7 dsample-point .7
Now!start!python3!and!try!the!transmit!with!CAN!FD!and!BRS!set.!
python3
import can
bus = can.interface.Bus(channel='can0', bustype='socketcan',fd = True)
msg = can.Message(arbitration_id=0x7de,extended_id=False,is_fd = True,
bitrate_switch = True,data=[0,0,0,0,0,0x1e,0x21,0xfe, 0x80, 0, 0,1,0])
bus.send(msg)!

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!PiCAN FD DUO ISO Rev B 1.0
!
SK Pang Electronics Ltd Ó 2022
www.skpang.co.uk
7
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To!received!messages!and!display!on!screen!type!in:!
notifier = can.Notifier(bus, [can.Printer()])
Documentation!for!python-can!can!be!found!at!:!!
https://python-can.readthedocs.io/en/stable/index.html!
More!expamles!in!github:!
https://github.com/skpang/PiCAN-FD-Python-examples!