SK Pang Electronics RSP-PICAN FD User manual

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SK&Pang&Electronics&Ltd&©&2017&
www.skpang.co.uk&
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Product&name&& PICAN&FD&CAN-Bus&Board&for&Raspberry&Pi&3&
Model&number& RSP-PICAN&FD&
Manufacturer& & SK&Pang&Electronics&Ltd&
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PiCAN FD with RTC
USER GUIDE V1.1

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SK&Pang&Electronics&Ltd&©&2017&
www.skpang.co.uk&
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Contents'
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Table'of'Contents'
1.!Introduction'............................................................................................................'3!
1.1.!Features!................................................................................................................................................................!3!
2.!Hardware'Installation'..............................................................................................'3!
1.2.!Configuring!DB9!Connector!.........................................................................................................................!4!
1.3.!OBDII!Cable!.........................................................................................................................................................!4!
1.4.!CAN!Cable!.............................................................................................................................................................!4!
1.5.!Screw!Terminal!..................................................................................................................................................!5!
1.6.!120Ω!Terminator!.............................................................................................................................................!5!
1.7.!LED!..........................................................................................................................................................................!5!
1.8.!Not!Fitted!Items!.................................................................................................................................................!5!
3.!Software'Installation'...............................................................................................'6!
1.9.!Installing!CAN!Utils!..........................................................................................................................................!7!
1.10.!Bring!Up!the!Interface!..................................................................................................................................!7!
4.!Real'Time'Clock'(RTC)'Software'Installation'.............................................................'8!
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SK&Pang&Electronics&Ltd&©&2017&
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1. Introduction'
This!PiCAN!FD!board!provide!CAN-Bus!FD!capability!for!the!Raspberry!Pi!3.!It!uses!the!
Microchip!MCP2517FD!CAN!FD!controller!with!MCP2562FD!CAN!transceiver.!
Connections!are!made!via!DB9!or!4!way!screw!terminal.!This!board!is!also!available!
with!a!5v!1A!SMPS!that!can!power!the!Pi!is!well!via!the!screw!terminal!or!DB9!
connector.!A!real!time!clock!with!battery!back!up!(battery!not!included)!is!also!on!the!
board.!
Easy!to!install!SocketCAN!driver.!Programming!can!be!done!in!C!or!Python.!
1.1. Features'
•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!standard!9-way!sub-D!connector!or!screw!terminal!
•Compatible!with!OBDII!cable!
•Solder!bridge!to!set!different!configuration!for!DB9!connector!
•120Ω!terminator!ready!
•Serial!LCD!ready!
•LED!indicator!
•Four!fixing!holes,!comply!with!Pi!Hat!standard!
•SocketCAN!driver,!appears!as!can0!to!application!
•Interrupt!RX!on!GPIO25!
•RTC!with!battery!backup!(battery!not!included)!
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.!
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1.2. Configuring'DB9'Connector'
The!CAN!connection!can!be!made!via!the!DB9!connector.!The!connector!be!configured!
for!different!pinout.!Depend!if!you!are!using!an!OBDII!cable!or!a!CAN!cable.!!
1.3. OBDII'Cable'
Close!the!solder!bridges!on!the!lefthand!side!on!SJ1,!SJ2!and!SJ3!as!shown!with!a!red!
line.!!
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1.4. CAN'Cable'
Close!the!solder!bridges!on!the!righthand!side!on!SJ1,!SJ2!and!SJ3!as!shown!with!a!
green!line.!
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DB9$Pin$
number$
Function$
2!
GND!
3!
CAN_H!
5!
CAN_L!
DB9$Pin$
number$
Function$
3!
GND!
7!
CAN_H!
2!
CAN_L!

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1.5. Screw'Terminal'
The!CAN!connection!can!also!be!made!via!the!4!way!screw!terminal.!!
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Note!:!The!+12v!In!is!only!used!on!the!PiCAN2!FD!board!with!SMPS!option!fitted.!
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1.6. 120Ω'Terminator'
There!is!a!120Ω!fitted!to!the!board.!To!use!the!terminator!solder!a!2way!header!pin!to!
JP3!then!insert!a!jumper.!
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1.7. LED'
There!is!a!red!LED!fitted!to!the!board.!This!is!connected!to!GPIO22.!
1.8. Not'Fitted'Items'
JP5!can!be!use!to!power!a!serial!LCD!with!data!on!TXD!line!from!the!Pi.!There!is!also!
5v!supply!on!JP5.!
Switch!mode!power!supply,!this!is!a!5v!module!that!can!power!the!Pi.!It!has!an!input!
voltage!range!of!6v!to!30v.!
Pin$number$
Function$
1!
CAN_H!
2!
CAN_L!
3!
GND!
4!
+12v!In!

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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
Now!download!the!kernel!patch!from:!
https://www.dropbox.com/s/kxfter1hjomesnd/mcp2517fd-rasp1%2B2%2B3_18_Dec.tar?dl=0
Copy!the!file!to!the!root!directory!then!untar!the!files:!
sudo cp mcp2517fd-rasp1+2+3_18_Dec.tar /
cd /
sudo tar –xf mcp2517fd-rasp1+2+3_18_Dec
Add!the!overlays!by:!
sudo nano /boot/config.txt
Add!these!lines!to!the!end!of!file:!
dtparam=i2c_arm=on
dtparam=spi=on
dtoverlay=i2c-rtc,pcf8523
core_freq=250
kernel=ms7/zImage
device_tree=ms7/bcm2710-rpi-3-b.dtb
overlay_prefix=ms7/overlays/
dtoverlay=mcp2517fd-can0
dtparam=interrupt=25
dtparam=oscillator=40000000
dtparam=spimaxfrequency=20000000
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Reboot!Pi:!
sudo reboot

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1.9. 'Installing'CAN'Utils'
Install!the!CAN!utils!by:!
apt-get install can-utils
1.10. 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.!
sudo /sbin/ip link set can0 up type can bitrate 500000 dbitrate 2000000 fd on sample-
point .8 dsample-point .8
Connect!the!PiCAN2!to!your!CAN!network!via!screw!terminal!or!DB9.!
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
You!should!see!something!like!this:!

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4. Real'Time'Clock'(RTC)'Software'Installation'
Insert!a!CR1220!battery!(not!supplied)!into!battery!holder.!Ensure!the!“+”!is!facing!
upward.!
Install!the!i2c-tools!by:!
sudo apt-get install i2c-tools
Then!check!the!RTC:!
sudo i2cdetect -y 1
You!should!see!68!or!UU!on!address!0x68:!
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Now!you!need!to!disable!the!"fake!hwclock"!which!interferes!with!the!'real'!hwclock!
sudo apt-get -y remove fake-hwclock

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sudo update-rc.d -f fake-hwclock remove
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Start!the!original!hw!clock!script!by:!
sudo nano /lib/udev/hwclock-set
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and!comment!out!these!three!lines:!
#if [ -e /run/systemd/system ] ; then
# exit 0
#fi
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Reboot!the!Pi.!
Ensure!the!Ethernet!cable!or!Wifi!is!on.!This!will!get!the!time!from!the!network.!!
Set!the!clock!by:!
sudo hwclock -w
To!read!the!clock:!
sudo hwclock -r
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