Project Radar Boards Schiphol Control

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Versie door DirkWillem (overleg | bijdragen) op 11 jun 2021 om 22:01 (ATMEGA 161L)
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display in use (top left hand corner)

We got a pile of Control Tower displays from Schiphol airport (or Eurocontrol, etc) used for tracking what is in the air.

They are basically small 2-3 CPU boards on a common RS 485 bus or on RS 232. One CPU is purely for programming. The other is the main board and handles the traffic on the bus (it may be ASTERIX format?) and the other handles the display. They are interconnected by a TTL serial on 9600 8N1. Each box also contains a high quality PSU.

The programming chip is also 9600 8N1 and contains some debugging tooling. Photo below shows the testpoints used for programming.

But easiest may be to use normal ATMEL programmeing on MISO/MOSI - which are nicely broken out on the connector.

Rudimentary code: https://github.com/MakerSpaceLeiden/AirtrafficControlDisplaysSchiphol

Bestand:Schiphol-first-light.mov

Schiphol Airtraffic Control displays

Datasheet-display-board-both.jpg

Seems to be the reference circuit from the display datasheet with an Atmel161:

Datasheet-display-schiphol-sample.png

With an SNx4HC138 3 line to 8 line decoder/demux used. De displays zijn niet op alle borden gelijk - maar wel uit de zelfde serie en aansturing.

Boards

Datasheet-display-board.jpgDatasheet-display-display-front.jpgDatasheet-display-display-back.jpg

Main connector

1 NC 2 NC
3 NC 4 NC
5 ? 6 ?
7 RST 8 SCK
9 MISO 10 MOSI
11 RX 12 TX
13 SS 14 Vdd
15 Vdd 16 ?
17 ? GND
GND GND

Multiplexer

HC138 is een multiplexer (https://www.ti.com/lit/ds/symlink/sn74hc138.pdf?ts=1623312092250&ref_url=https%253A%252F%252Fwww.google.com%252F)

Pin 1,2,3 zijn de selects. 4,5 enables, G1 de active high

ABC worden alleen gebruikt - en schakelen het display

Multiplexer numbering

Schiphol-mul-num.png

ATMEGA 161L

See also https://github.com/MakerSpaceLeiden/AirtrafficControlDisplaysSchiphol/blob/main/pins.h -- which has been tested against the actual board.

1 MOSI - pin 9 connector
2 MISO - pin 10 connector
3 SCK - pin 8 connector
4 RST - pin 7 connector
5 RX - pin 11 connector
6 NC
7 TX - pin 12 connector
8 Brightness up to ground
9 Brightness down to ground
10
11
12 pin 10 display WR
13 pin 1 display RD
14
15
16
17
18 pin 9 display A0
19 pin 8 display A1
20 pin 7 display A2
21 MCP 1 - 'A' select
22 MCP 2 - 'B' select
23 MCP 3 - 'C' select
24 pin 5 display CE1
25
26 pin 4 display RST
27
28
29
30 pin 11 display D7
31 pin 12 display D6
32 pin 13 display D5
33 pin 14 display D4
34 pin 15 display D3
35 pin 16 display D2
36 pin 17 display D1
37 pin 18 display D0
38 VCC
39
40
41
42
43
44 SS - pin 13 connector

Display

The various cards contains displays from the PD family.


Multiplexer numbering

Schiphol-mul-disp-num.png

Datasheet displays

The photo's are from the card with the 6 displays of type PD443.

PD-series-displays-datahsheet.pdf

Various people hack them

Main Board

Connection on the main bord - top row near the yellow 'TOP1' label.

Wiring / pinout main CPU board

Radarboard-pinout-main.jpg.

TOP 1 SCK of CPU display board
TOP 2 MISO of CPU display board
TOP 3 MOSI of CPU display board
TOP 10 RST of CPU display board
TOP 13,14 TX/RX of CPU display board
BOT far left/right Power

Progamming cable ATMEL Atmel-isp-pinout.png to which this needs to be connected.