Dual CANbus monitor and instrumentation cluster

Eagle Schematic and Board design

/media/uploads/TickTock/canaryr5.zip

/media/uploads/TickTock/sch_r4.jpg /media/uploads/TickTock/lcdsch.jpg /media/uploads/TickTock/brd_r4.jpg

Parts List

qtyinstancepart #packagesupplierDescription
1BAT3Vhttp://www.ebay.com/itm/10x-CR2032-SMD-Battery-Holder-for-CR2032-Battery-/180938057979?pt=LH_DefaultDomain_0&hash=item2a20bfa8fbLithium 2032 coin battery holder
4C1-C4ECST1DC106R6032Tantalium capacitor 10uF
3FC1-FC3ZF1-20-01-T-WThttp://www.samtec.com/cable-systems/idc-ffc/ffc/zero-insertion.aspx20 conductor 1mm pitch flex cable connector (optional)
1FJ-20-R-08.00-4http://www.samtec.com/cable-systems/idc-ffc/ffc/zero-insertion.aspx8\" 20 conductor 1mm pitch flex connector, end reversed (optional)
2H1-H4(DON'T populate H1-H4 headers - solder mbed directly)
1H5http://www.ebay.com/itm/221186042943?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l26491x12 .1\" pitch header (optional)
1H62x6 .1\" pitch header (optional)
2IC1,IC2VP230LMDSOP8http://www.ebay.com/itm/130488665247?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649canbus transciever
1IC3LM1117-5VSOT2235V regulator
5JP*2 pin .1\" jumper header
1mbedLPC1768http://www.ebay.com/itm/200830573509?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649mbed uC
2Q1,Q22N2222SOT23General purpose NPN transistor
1R1R392M12063.9K resistor
4R2,R4-R6R102M12061K resistor
1R3R500M120650 Ohm resistor
2TR1-TR5ZJYS81R5-2PL51TG01http://www.digikey.com/product-detail/en/ZJYS81R5-2PL51T-G01/445-2223-1-ND/765232CM Choke
1Z11N5340BGC1702-15http://www.ebay.com/itm/150878122425?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l26496V, 5W Zener Diode
1X1USBhttp://www.ebay.com/itm/New-Vertical-USB-2-0-A-pcb-connector-socket-USB-A-Type-/300553895292?pt=LH_DefaultDomain_0&hash=item45fa687d7cvertical USB connector
2LCD0,LCD1TFThttp://www.mikroe.com/add-on-boards/display/tft-proto/320x240 LCD with touch screen

Assembly

1) LCD Displays

I found ribbon cable is a nice way to organize the wires to the displays. You'll need 12 conductors and I connected them in the following order:

1LED+
2LED-
3RSTB
4MOSI
5SCLK
6CSB
7X+
8X-
9Y+
10Y-
11VDD
12GND

First I connected all the GND connections (IM0, IM1, IM3, & 2 GND). Do not connect the bottom GND until you have the ribbon cable connected. After making all the ribbon cable connections (connecting the GND of the ribbon cable to the bottom GND pad), solder the GND bar from the previous step to the back of the bottom GND connection. Finally, make a connection from the back side 3.3V pin to IM2. Take a break and repeat for the second display. /media/uploads/TickTock/lcdtop.jpg /media/uploads/TickTock/lcdbot.jpg Once the two displays are complete combine all wires except CS0, CS1, X+, X-, Y+, and Y-. Connect X- of the left display to X+ of the right. Similarly connect Y- of the left display to Y+ of the right. Insulate any exposed wires.

2) PCB

Refer to the schematics to place all the components on the board. If you plan to install into the CANary 3D enclosure, DO NOT install the battery holder or the socket for the mbed and, instead, connect two wires to the VB and GND pads nearby. You will have to install the battery holder against the back wall to avoid interfering with the right-hand display and the mbed will have to be directly soldered. I have not found a socket with a low enough profile to fit in the space provided (depth of enclosure is limited by the space behind the center console). Also, I recommend keeping as much lead as possible on the Zener diode (bending it as shown to clear the back wall). Although it is operating well within parameters, the Zener gets quite hot during extended operation and the leads help dissipate the heat and keep it away from the PCB and other components.

/media/uploads/TickTock/pcbtop.jpg /media/uploads/TickTock/pcbbot.jpg

Once the PCB is populated, solder the LCDs to the PCB. CS0 connects to the right display and CS1 connects to the left. /media/uploads/TickTock/brddis.jpg

3) Testing

1)First step is to buzz out all connections from the LCDs to the pins in the main board
2)Next check the touch screen connections. On the main board, place an Ohm meter across X+ and X-. You should read 700 Ohms. Repeat for Y+ and Y-. Then test the resistance from X+ to Y+. With nothing touching the screens, it should read >100K Ohms and <1K when touching either screen.
3)When all connections are checked, solder in the mbed. Download and install the touch2 program http://mbed.org/users/TickTock/code/touch2/ to test the basic operation of the mbed and touch screens.
tips:
Touch screen is sensitive - excess flux on X+,X-,Y+,Y- connection on mbed can result in flakey operation
If touch is not working, double-check the LCD0_CS and LCD1_CS are not swapped. LCD0_CS must connect to the CS of the LCD that has X- & Y- connected to the mbed. LCD1_CS must connect to the CS of the LCD that has X+ & Y+ connected to the mbed.
4)Once touch2 works, it is time to connect to the OBD connector. I highly recommend double checking all connections from the OBD to the PCB with the cable in place before connecting to the Leaf. Buzz out all the pins in the OBS to make sure none are shorting to each other, Check that the 12V goes to the Zener (and nothing else) and the switched 12V to the resistor divider (and nothing else). Test the ground connection properly connects to ground and nothing else.
5)Once you are confident there are no shorts or wrong connections from the OBD connector, take a deep breath and plug it into your leaf. Touch2 program should come up and function. Unplug and install the latest CANary firmware. Test all features before installing into the enclosure (gids, cellpair, menu system, logging) since installing and removing from the enclosure is a PITA.

/media/uploads/TickTock/pcbdone.jpg /media/uploads/TickTock/functioning.jpg

4) Enclosure

The 3D printer leaves a lot of powder behind - I used a strong spray of water to get it out of all the cracks. The enclosure comes with a rather rough finish. I recommend convincing yourself you like it, then simply lightly sand then paint before assembly. Sanding is very difficult - the nylon is very nicely fused and doesn't want to sand. I tried sandblasting and that didn't work either. I had some limited success with filler and then sanding, but only on the outside - it is too difficult to sand the face.

5) Final Assembly

Committer:
TickTock
Date:
Sat Mar 23 04:43:45 2013 +0000
Revision:
36:dbd39c315258
Parent:
35:5acbd8a64a89
Child:
37:fea2c1d52c5f
Added playback option

Who changed what in which revision?

UserRevisionLine numberNew contents of line
TickTock 12:8e42d7ba8468 1 // This contains all the display subroutines
TickTock 12:8e42d7ba8468 2
TickTock 12:8e42d7ba8468 3 #include "TOUCH_TFTx2.h"
TickTock 12:8e42d7ba8468 4 #include "Arial12x12.h"
TickTock 12:8e42d7ba8468 5 #include "Arial12x12_prop.h"
TickTock 22:a43df3905863 6 #include "Arial24x23.h"
TickTock 12:8e42d7ba8468 7 #include "Arial28x28.h"
TickTock 12:8e42d7ba8468 8 #include "Neu42x35.h"
TickTock 12:8e42d7ba8468 9 #include "SCProSB31x55.h"
TickTock 13:62e0f7f39ff5 10 #include "common.h"
TickTock 12:8e42d7ba8468 11
TickTock 13:62e0f7f39ff5 12 extern CANMessage lastMsg[100];
TickTock 13:62e0f7f39ff5 13 extern unsigned char indexOffset;
TickTock 13:62e0f7f39ff5 14 extern unsigned char msgChanged[100];
TickTock 13:62e0f7f39ff5 15 extern char displayLog[20][40];
TickTock 13:62e0f7f39ff5 16 extern unsigned char displayLoc;
TickTock 13:62e0f7f39ff5 17 extern char indexLastMsg[0x800];
TickTock 13:62e0f7f39ff5 18 extern unsigned char battData[256];
TickTock 13:62e0f7f39ff5 19 extern bool showCP;
TickTock 23:cd03f9c3395e 20 extern bool logEn;
TickTock 33:a277743ebdeb 21 extern bool repeatPoll;
TickTock 13:62e0f7f39ff5 22 extern unsigned char dMode[2];
TickTock 13:62e0f7f39ff5 23 extern unsigned char lastDMode[2];
TickTock 13:62e0f7f39ff5 24 extern unsigned char sMode;
TickTock 13:62e0f7f39ff5 25 extern TOUCH_TFTx2 tt;
TickTock 25:ddf0ec209f03 26 extern unsigned char dtMode;
TickTock 35:5acbd8a64a89 27 extern float accV;
TickTock 35:5acbd8a64a89 28 extern bool tick;
TickTock 36:dbd39c315258 29 extern bool playbackEn;
TickTock 36:dbd39c315258 30 extern bool playbackOpen;
TickTock 36:dbd39c315258 31 extern float playbackInt;
TickTock 12:8e42d7ba8468 32
TickTock 12:8e42d7ba8468 33 extern "C" {
TickTock 13:62e0f7f39ff5 34 void printLast (bool force);
TickTock 13:62e0f7f39ff5 35 void printChanged (bool force);
TickTock 13:62e0f7f39ff5 36 void printLog (bool force);
TickTock 13:62e0f7f39ff5 37 void printDTE (bool force);
TickTock 13:62e0f7f39ff5 38 void braking (bool force, bool prdata);
TickTock 13:62e0f7f39ff5 39 void cpData(bool force);
TickTock 25:ddf0ec209f03 40 void showDateTime(bool force);
TickTock 13:62e0f7f39ff5 41 void updateDisplay(char display);
TickTock 24:6cf76ed8c432 42 void showButton(unsigned char column, unsigned char row, char * text1, char * text2, unsigned char columns, unsigned char rows);
TickTock 12:8e42d7ba8468 43 }