SK Pang Electronics PiCAN-M User manual
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!PiCAN-M Rev B 1.0
!
SK Pang Electronics Ltd Ó 2020
www.skpang.co.uk
1
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Product name PiCAN-M with NMEA 0183 and NMEA 2000 Connection
Model number RSP-PICAN-M
Manufacturer SK Pang Electronics Ltd
PiCAN-M
USER GUIDE V1.0
July 2020
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!PiCAN-M Rev B 1.0
!
SK Pang Electronics Ltd Ó 2020
www.skpang.co.uk
2
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Contents
Table of Contents
1.!Introduction ........................................................................................................... 3!
1.1.!Features*.............................................................................................................................................................*3!
2.!Hardware Installation ............................................................................................. 4!
1.2.!NMEA*2000*CAN-BUS*Connection*.........................................................................................................*4!
1.3.!NMEA*0183*(RS422)*Connection*...........................................................................................................*5!
1.4.!120W*Terminator*..........................................................................................................................................*5!
1.5.!LED*.......................................................................................................................................................................*5!
1.6.!Switch*Mode*Power*Supply*(optional)*................................................................................................*5!
3.!Software Installation .............................................................................................. 5!
1.7.!Installing*CAN*Utils*.......................................................................................................................................*6!
1.8.!Bring*Up*the*Interface*.................................................................................................................................*6!
4.!NMEA 0183 (RS422) Installation ............................................................................. 7!
5.!Qwiic (I2C) Connector J4 ......................................................................................... 9!
6.!Third Party Applications ......................................................................................... 9!
1.9.!Connecting*a*BME280*Sensor*................................................................................................................*10!
!
!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!PiCAN-M Rev B 1.0
!
SK Pang Electronics Ltd Ó 2020
www.skpang.co.uk
3
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1. Introduction
This!is!a!PiCAN-M!with!NMEA!0183!and!NMEA!2000!Connection.!The!NMEA!0183!
(RS422)!is!via!a!5!way!screw!terminal.!The!NMEA!2000!is!via!Micro-C!connector.!
Extra!sensors!can!be!connected!via!the!Qwiic!(I2C)!connector.!
Optional!3A!SMPS.!The!12v!from!the!NMEA!2000!network!can!be!use!to!power!the!
PiCAN-M!and!the!Raspberry!Pi.!
Easy!to!install!SocketCAN!driver.!Programming!can!be!done!in!C!or!Python.!
1.1. Features
• CAN!connection!via!Micro-C!connector!
• 120Ω!terminator!ready!
• SocketCAN!driver!
o appears!as!can0!to!application!
• NMEA!0183!(RS422)!via!5-way!screw!terminal!
o appears!as!ttyS0!to!application!
• LED!indicator!(GPIO22)!
• Qwiic!(I2C)!connector!for!extra!sensors!
• Optional!3A!SMPS.!!
• Compatible!with!OpenCPN!and!Signal!K!!
!
!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!PiCAN-M Rev B 1.0
!
SK Pang Electronics Ltd Ó 2020
www.skpang.co.uk
4
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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.!
!
!
1.2. NMEA 2000 CAN-BUS Connection
The!CAN-bus!connections!are!made!via!J1!a!5!pin!Micro-C!connector.!
!
!
!
!
J1#
Function#
1!
Shield!
2!
+12v!
3!
GND!
4!
CAN_H!
5!
CAN_L!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!PiCAN-M Rev B 1.0
!
SK Pang Electronics Ltd Ó 2020
www.skpang.co.uk
5
!
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1.3. NMEA 0183 (RS422) Connection
The!NNEA!0183!(RS422)!connection!are!made!via!J3!a!5way!screw!terminal.!
!
!
!
1.4. 120
W
Terminator
There!is!a!120W!resistor!fitted!to!the!board.!To!use!the!terminator!solder!a!2way!
header!pin!to!JP1!then!insert!a!jumper.!
1.5. LED
There!is!a!red!LED!fitted!to!the!board.!This!is!connected!to!GPIO!22.!
1.6. Switch Mode Power Supply (optional)
This!is!an!optional!5v!3A!module!that!can!power!the!Pi.!It!has!an!input!voltage!range!
of!7v!to!24v.!
!
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:!
J3#
Function#
1!
GND!
2!
IN!+!
3!
IN!-!
4!
OUT!-!
5!
OUT!+!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!PiCAN-M Rev B 1.0
!
SK Pang Electronics Ltd Ó 2020
www.skpang.co.uk
6
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sudo nano /boot/config.txt
Add!these!lines!to!the!end!of!file:!
dtparam=i2c_arm=on
dtparam=spi=on
dtoverlay=mcp2515-can0,oscillator=16000000,interrupt=25
dtoverlay=spi-bcm2835-overlay
Reboot!Pi:!
sudo reboot
1.7. Installing CAN Utils
Install!the!CAN!utils!by:!
sudo apt-get install can-utils
1.8. Bring Up the Interface
You!can!now!bring!the!CAN!interface!up!with!CAN!2.0B!at!250kbps:!
sudo /sbin/ip link set can0 up type can bitrate 250000
Connect!a!NMEA!2000!device!to!the!network!and!start!candump.!
!
candump can0
You!should!see!something!like!this:!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!PiCAN-M Rev B 1.0
!
SK Pang Electronics Ltd Ó 2020
www.skpang.co.uk
7
!
This*capture*is*from*a*Yacht*Devices*Digital*Thermometer*NMEA*2000*YDTC-13N*
4. NMEA 0183 (RS422) Installation
The!NMEA!01832!(RS422)!is!connect!to!the!Pi!on!UART!port.!This!need!to!be!enable!
first.!!
On!the!Raspberry!Pi!type!in:!
sudo raspi-config
Select!5!Interfacing!Options,!P6!Serial!
“Would!you!like!a!login!shell!to!be!accessible!over!serial!?”!Select!No.!
!
“Would!you!like!the!serial!port!hardware!to!be!enabled!?”!Select!Yes.!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!PiCAN-M Rev B 1.0
!
SK Pang Electronics Ltd Ó 2020
www.skpang.co.uk
8
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Select!finish!and!reboot!the!Pi.!
Connect!a!NMEA!0183!GPS!device!to!the!5!way!connect!like!shown!below:!
!
On!the!Pi!terminal!type!in:!
stty -F /dev/ttyS0 raw 4800 cs8 clocal
cat /dev/ttyS0
You!should!now!see!the!GPS!sentences:!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!PiCAN-M Rev B 1.0
!
SK Pang Electronics Ltd Ó 2020
www.skpang.co.uk
9
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5. Qwiic (I2C) Connector J4
J4!is!a!Qwiic!(I2C)!connector.!The!I2C!bus!can!be!use!for!extra!sensors.!
!
6. Third Party Applications
There!are!many!third!party!applications!that!can!be!use!with!the!PiCAN-M!board:!
• OpenCPN!
• Signal!K!
A!NMEA!0183!GPS!device!can!be!use!with!OpenCPN.!Once!there!is!a!GPS!lock!you!can!
view!your!location!on!the!map.!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!PiCAN-M Rev B 1.0
!
SK Pang Electronics Ltd Ó 2020
www.skpang.co.uk
10
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Temperature!reading!from!a!Yacht!Devices!Digital!Thermometer!NMEA!2000!YDTC-
13N!on!Signal!K!instrument!panel.
!
1.9. Connecting a BME280 Sensor
The!Sparkfun!BME280!sensor!can!provide!barometric!pressure,!humidity,!and!
temperature!to!the!Raspberry!Pi.!
The!default!address!on!the!board!is!0x77!but!this!gives!a!problem!to!Signal!K!
application.!This!can!be!solved!by!changing!it!to!0x76.!To!do!this!cut!the!track!on!the!
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