Opencockpits IOCard Displays II User manual

Date:08/03/17
Rev.:2.3
IOCard Displays II Manual

IOCard Displays II Manual
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Index:
IOCARD DISPLAYS II MANUAL.................................................................................................................. 1
INDEX:.......................................................................................................................................................... 2
INTRODUCTION:......................................................................................................................................... 3
DISPLAYS II: ............................................................................................................................................... 3
Components and outline:...................................................................................................................... 3
Connector's description:....................................................................................................................... 4
INPUTS:...................................................................................................................................................... 4
Displays direct to Displays II card: ....................................................................................................... 5
Displays conected through Opencockpits PCB´s:................................................................................ 5
TESTING THE CARD:.................................................................................................................................... 6
SOFTWARE INSTALLATION AND CONFIGURATION: .......................................................................................... 9
Variables definition and displays use:.................................................................................................. 9
Special characters and brightness:.................................................................................................... 10
Practical example: .............................................................................................................................. 10
LINKS OF INTEREST: ............................................................................................................................... 12

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Introduction:
The IOCard Displays II was specifically designed to use multi 7-segments displays at a time
without having to use all Master's outputs and can facilitate the management, connections,
configuration and expansion.
Displays II:
This card allows to connect 16 7-segment digits, how the Master's
J1 connector manages up to 4 Displays II cards (64 digits), it is
ideal to manage big panels that needs a lot of digits.
We must have in mind that this card is designed to use "common
cathode" 7-segment displays.
Components and outline:
- J1 = IDC 40 PINS CONNECTOR
- J2, J3 ,J4, J5 = 2 PINS CONNECTOR (JUMPERS)
- SW1 = 2 PINS CONNECTOR (JUMPER)
- J6 = 8 PINS MALE CONNECTOR
- J7 = 16 PINS MALE CONNECTOR
- C1 = CAPACITOR 100 nF
- C2, C3 = CAPACITOR 22 pF
- R1 = RESISTOR 100R
- R2 = RESISTOR 10K
- Q1 = QUARTZ CRYSTAL 20 MHZ
- IC1 = MICROCONTROLLER 16F876
- IC2 = INTEGRATED CIRCUIT 74HC139
- IC3 = INTEGRATED CIRCUIT 74HC154
- IC4 y IC5 = INTEGRATED CIRCUIT 74HC540
- IC6, IC7, IC8 = INTEGRATED CIRCUIT ULN2003A

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Connector's description:
• J1 = INPUT DATA CONNECTOR FROM MASTER CARD.
• J2, J3 ,J4, J5 = JUMPERS FOR DISPLAYS II IDENTIFICATION SELECTION.
• SW1 = NOT USED.
• J6 = 7-SEGMENTS OUTS.
• J7 = COMMON CATHODE INPUTS.
Inputs:
The inputs from Master card are builded with flat 40 contacts cable, that is to say we use old
hard disk IDE cables with IDC connectors.
How each Master card can manage up to 4 Displays II, we have to select wich Displays II card
conected we want to use, for that we will use the J2 to J5 jumpers. That is to say, we will
change the jumpers to select the displays order as shown:
Closed jumper Card order Displays numbers
J2 1st 0-15
J3 2nd 16-31
J4 3rd 32-47
J5 4th 48-63
How we see at the photo:

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To connect the 7-segment displays we can solder it directly, either throug pre-drilled cards or
home made cards or Opencockpits PCB's (references 0T7, 0T6 y 0T10) and for that we can
follow the next schemes:
Displays direct to Displays II card:
R2
a
a
b
b
c
c
d.p.
common
d
d
e
e
f
f
pin1
g
g
not
R1
SW1
HDSP7403
HDSP7403
7 SEGMENT DISPLAY HDSP7403
J5
pin1 pin1
J6
Digit 1
Digit 2
Digit 16
J4
J3
J2
IC3
IC1
IC5
IC4
IC8 IC7 IC6
IC2
J1
J7
C1
C2
Q1
C3
Displays conected through Opencockpits PCB´s:
R2
a
a
b
b
c
c
d.p.
common
d
d
e
e
f
f
pin1
g
g
not
R1
SW1
HDSP7403
7 SEGMENT DISPLAY
J5 J6
1
D1D2D3D4D5
D.P. (dot point)
to a Master OutPut
1
Digit 1
Digit 2
Digit 3
Digit 4
Digit 5
Digit 16
J4
J3
J2
IC3
IC1
IC5
IC4
IC8 IC7 IC6
IC2
J1
J7
C1
C2
Q1
C3

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The feeding for displays comes from Master's bus (40 contacts flat cable). It is obvious that
Master card must be 5V feeded. The examples shown above are designed for Agilent HDSP
displays, that are compatibles with Opencockpits displays, but we can modify the connections
for a different pinout, the only condition is that the displays must be "common cathode".
In the case we use the displays decimal point (D.P.), this point can be connected directly to a
Master's output and is not necessary to connect the common or connect a resistor because the
Displays II works in multiplexed mode, for that 7-segment displays will never suffer overloads
avoiding segment meltings.
Testing the card:
We already knows the IOCard Displays II, let's go to connect and test it, we will use a
Opencockpits 5 digits pcb (reference 2TD2) as the above example.
As it is not advisable to solder directly to the cards, we will use "tuned" jumpers as connectors, 8
for the segments and 10 for common cathodes:
Once we have everything connected should look like:

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We will connect Displays II card to the Master card using J1 and will run Sioc to check our
assembly.
1.- Run SIOC (last version as possible), push on Sioc Monitor button, we will see this screen
and we will do double click on IOCardUSB+Master where our Displays II is connected:
2.- In this case we will use only the ""DISPLAY DIGITS" section:

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We need test if all 7-segment displays works fine, we will push ALL ON button that will put on all
USB Expansion outputs, including our displays.
If the displays doesn´t light on something is wrong and we have to revise all connections pin to
pin.
If the displays are all on, we can go to next step, more complicated test, for that is important
remember that the displays numbering is from the right to the left on SIOC to facilitate
profesional wiring, we have a specific manual for Displays II wiring (Making cables for 7
segment digits Manual) that will help us to connect big panels with a lot of digits as overhead
module or others in the future.
Next will check the displays positions, Push ALL OFF button (displays will off), in the upper
DISPLAY DIGITS section we have Position and Value 0-15, we will use it now.
We will send 12345 sequence, writing the position and the value and sending it with SEND
button:
Position Value 0-15
0 5
1 4
2 3
3 2
4 1
Will look as this:

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Software installation and configuration:
Already knows how to check Displays II cards and 7-segment displays, now we have to
program it on SIOC, we will need following software:
SIOC,
Flight Simulator as FS2004, FS2009, FSX, Xplane, etc.,
Necessary plugins for simulator,
Etc.
At the end of this document there is a list of links to download the necessary software to put into
practice this manual.
Variables definition and displays use:
Look some theory, the digit's variable declaration:
Var 0001, Name digit_0, Link IOCARD_DISPLAY, Device 0, Digit 0, Numbers 1
Device, IDX number of USBExpansion where is connected the Displays II card.
Digit, less signifiant physical digit (the righter digit or units) of cipher we want to use.
Numbers, represents how many digits we want to send to display.
If we want put "5" at righter digit, we only have to assign "5" to the variable:
v0001 = 5
or
digit_0 = 5
to use more than a digit we have in mind the next:
Imagine that we have to send the captains MCP heading (three digits), that turns from 0 to 359
degrees:
Var 1000 // captain's heading
{
&HDG = v1000
}
Var 3000, Name HDG, Link IOCARD_DISPLAY, Device 0, Digit 0, Numbers 3
This code means that variable v3000 (HDG) will show V1000 value at display placed on device
0 (our only Master connected), starting from digit 0 (less value or righter digit of three 7-
segments display), using 3 displays (0, 1 & 2). We must remember that we have to assembly
the displays all together in this order: 2, 1, 0.

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Special characters and brightness:
To visualize special characters we can use specific codes on SIOC as shown:
-999999 = digit off,
-999998 = digit shows "-",
-999997 = digit shows "6" (with upper segment on),
-999996 = digit shows "t",
-999995 = digit shows "d",
-999994 = digit shows "_",
Also we can control the brightness of the digits using the value -999994 and then sending the
brightness value bettween 0 and 15.
Practical example:
// *****************************************************************************
// * Config_SIOC ver 4.01 - By Manuel Velez - www.opencockpits.com
// *****************************************************************************
// * FileName : test_displays1.txt
// * Date : 15/03/2012
Var 0002, Link IOCARD_SW, Input 1 // switch status
{
IF V0002 = 1
{
V0008 = 1 // led on
V0003 = 1 // 1 on digit 0
V0004 = 2 // 2 on digit 1
V0005 = 3 // 3 on digit 2
V0006 = 4 // 4 on digit 3
V0007 = 5 // 5 on digit 4
}
ELSE
{
V0008 = 0 // led off
V0003 = -999999 // display off
V0004 = -999999 // display off
V0005 = -999999 // display off
V0006 = -999999 // display off
V0007 = -999999 // display off
}
}
Var 0003, Link IOCARD_DISPLAY, Digit 0, Numbers 1
Var 0004, Link IOCARD_DISPLAY, Digit 1, Numbers 1
Var 0005, Link IOCARD_DISPLAY, Digit 2, Numbers 1
Var 0006, Link IOCARD_DISPLAY, Digit 3, Numbers 1
Var 0007, Link IOCARD_DISPLAY, Digit 4, Numbers 1
Var 0008, Link IOCARD_OUT, Output 11
// end of file test_displays1.txt
How we can see the operation is to easy:
-First we declare tha variable connected to the switch wich will activate or deactivate the
displays and indicator LED that will indicate if switch is on or off, then we will send the values for
show 12345 cipher.