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+====== RocNetNode RocDisplay ======
+[[:english#command_stations|{{  :interface.png}}]][[:english|{{  :rocrail-logo-35.png}}]][[:rocnet:rocnetnode-en|{{ :rocnet:rocnet-hw.png}}]]
+[[:rocnet:rocnetnode-en|{{ icons:uk.png}}]][[:rocnet:rocnetnode-de|{{ icons:de.png}}]]
+[[:english|Content]] -> [[:english#command_stations|Command Stations]] ->  **[[rocnet:rocnet-prot-en|RocNet]]**
+  * [[rocnet:rocnet-prot-en|RocNet Protocol]] | **[[:rocnet:rocnetnode-en|RocNetNode]]**
+    * [[:rocnet:rocnetnode-hwsetup-en|RocNetNode Setup]] | [[:rocnet:rocnetnode-setup-en|RocNetNode Configuration]] | [[:rocnet:rocnetnode-img-en|Installer package]] | [[:rocnet:article-en|MERG Journal]]
+  * [[:gca:gca-index-en#raspbery_pi_rocnet_boards|Raspberry Pi Boards]]
+    * [[:gca1-pi01-en|GCA-Pi01]] | [[:rocnet:pi01can-en|Pi01CAN]] | [[:gca_pi02-en|GCA-Pi02]] | [[:gca-pi03-en|GCA-PI03]] | [[:gca-pi04-en|GCA-PI04]] | [[:gca-pi05-en|GCA-Pi05]] | [[:gca-pi06-en|GCA-Pi06]] | [[:GCA-PI07-en|GCA-PI07]] | [[:GCA-PI08-en|GCA-PI08]] | [[:gca107-en|GCA107 Relay board]] | **[[:rocnet:rocdisplay-en|RocDisplay]]** | [[:rocnet:fastclock-en|Fast Clock]]
+  * [[:rocnet:rocnetnode-build-en|Build from source]] | [[:raspi:raspi-dev-en|RasPi as Rocrail server]]
+  * [[:rocnet:faq-en|FAQ's]]
+ \\
+| Idea and support | Peter Ploiner |
+| Hardware, Firmware, Documentation and copyright | Walter Sax |
+| Rocnetnode revision | 2.0.9927+ |
+| Rocrail revision | 2.0.9928+ |
+ \\
+^  2021 the project was stopped, we suggest to use [[:wio:overview-en|WIO]]  ^\\
+ \\
+=====Introduction=====
+The Idea behind this project was to build a display connected to RocRail for displaying on the platforms current train informations (target, departure time, clock,...)\\
+Micro displays in size, 26 x 9 mm, to fit for H0 are now days available and could be used for [[https://en.wikipedia.org/wiki/Dynamic_passenger_information|Dynamic passenger information]].\\
+{{:rocnet:display_size_s.jpg}}
+//The red box in the picture shows approximately the display size in compare to the original in Austria for example.//
+{{:rocnet:dsc_0712_s.jpg|}}
+//First attempt on a H0 fine scale platform//
+\\
+\\
+Text objects in Rocrail have an Interface Tab which can be used to address a certain a display which will be used after an update event to send the new text.\\
+ \\
+{{:rocnet:rocdisplay.jpg?400}}{{:rocnet:rocdisplay-3.jpg}}\\
+ \\
+The implementation allows to adapt many possibilities for different country specific needs. Adaptions are possible directly from RocRail with control characters in the text.\\
+Some examples for individual adaption:\\
+  * Invert Displays
+  * Analog clock left/right/hide
+  * Rotate text
+  * blinking text
+  * brightness
+  * Display on/off
+  * many other options...
+\\
+A detailed description of all settings and possibilities can be found in the technical documentation.\\
+\\
+=====Components=====
+The RocDisplay unit is a set of three different components.\\
+The controller is attached to the RocNetNode.\\
+The display backplane is attaced to the controller. Up to 4 displays per contoller are possible.\\
+The display it self. It's mounted on the backplane.\\
+With jumpers J1/J2/J3 and J4 it is possible to select the address of the controller.\\
+This makes up to 16 contollers possible on one bus.\\
+Table of possible address settings of the controller:\\
+| J1 | J2 | J3 | J4 |Controller address|
+|X|X|X|X|80|
+|X|X|X|-|81|
+|X|X|-|X|82|
+|X|X|-|-|83|
+|X|-|X|X|84|
+|X|-|X|-|85|
+|X|-|-|X|86|
+|X|-|-|-|87|
+|-|X|X|X|88|
+|-|X|X|-|89|
+|-|X|-|X|90|
+|-|X|-|-|91|
+|-|-|X|X|92|
+|-|-|X|-|93|
+|-|-|-|X|94|
+|-|-|-|-|95|
+where X is jumper set and - jumper open
+The two status LED indicate the status of the controller.\\
+If the yellow LED is blinking, the controller is in the bootloader programm. After power on it waits around 5 seconds in bootloader and then it start the normal programm.\\
+During an update of the Display content the yellow LED is off. In this time the controller can't accept any other commands. Normaly it's as short as a little flash.\\
+\\
+The red LED indicates traffic on the Bus addressed to the RocDisplay controller. Normaly it flashes short if a command is send.\\
+\\
+The Displays are mounted on a backplane where all neccesary SMD components are placed for operation.\\
+On one backplane it's possible to mount two displays, so that a double sided passenger information is possible. Every Display need it own port on the controller.\\
+To avoid any interrupts in the communication between the RocDisplay controller and the Displays, the wires to the displays should be as short as possible.\\
+Wire lenght about 40cm should be possible.\\
+\\
+=====I2C=====
+Unfortunately the I2C hardware used in Raspberry Pi has a bug. This bug don't allow slave devices to stretch the clock signal.\\
+**For normal use of RocDisplay there is no problem, the I2C standard settings are valid for displaying text from RocRail.**\\
+The only thing is that reading of the Settings is with the standard I2C baud rate not possible.\\
+A workaround is to set the I2C bus speed temorary to 400kHz and after the settings are done back to 100kHz.\\
+To make it easier for users a config tool is available that set the necessary setting for reading and configure all RocDisplay settings on the controller.\\
+\\
+Links to the description of the hardware bug:\\
+[[http://www.advamation.de/technik/raspberrypi/rpi-i2c-bug.html]]\\
+[[https://github.com/raspberrypi/linux/issues/254]]\\
+\\
+=====Setup=====
+If RocDisplay controllers are connected is visible on the __**[[:rocnet:rocnetnode-setup-en#options|Rocnetnode Options]]**__ tag:\\
+{{:rocnet:rocnetnode-options-en.png}}\\
+ \\
+=====Text Format=====
+The text format to control the displays is documented in the [[#files|"Technische Beschreibung"]] (DE).\\
+Display commands are between braces.\\
+====Example====
+<code>
+{EB0F3}5 0 \{F1} Kurz Zug{L1}Rekawinkel{L0T1}       {B8L1}04:48{P}
+</code>
+Flash the logo for 'S-Bahn' and 'Regionalzug':
+<code>
+{EJ1B0F3}4 0 \{F2}  Kurz Zug{J2B2F3}4 0 \{F2J0L1F0}Wien FJB{L0T1F2B10L1F2}16:23{T0P}
+</code>
+For this example the depart time column must be deactivated:
+<code>
+{EF1}   Zug Fährt durch!!!{L1F0J1[             BITTE][     ZURÜCKTRETEN]P}
+</code>
+ \\
+=====Files=====
+   * {{:rocnet:rocdisplay_tecinfo_v1.pdf|RocDisplay Technische Beschreibung V1}} (German language)
+   * {{ :rocnet:rocdisplay_tecinfo_v1en.pdf |RocDisplay Technical Description}} {English Translation}