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+====== CAN-GC2a Universal 16 port I/O node for CANBUS ======
+[[english|{{  rocrail-logo-35.png}}]]
+{{  :arduino:gc2a-module.jpg?0x240}}
+[[:english|Content]] -> [[:hardware-en|Hardware]] -> [[:hardware-en#gca-cbus|CANBUS]]
+  * [[:cbus:overview-en|CAN-GC Overview]]
+  * [[:can-gca1-en|CAN-GC1]] | [[:can-gca1e-en|CAN-GC1e]] | [[:can-gcln-en|CAN-GCLN]] | [[:can-gca2-en|CAN-GC2]] | **[[:can-gca2a-en|CAN-GC2a]]** | [[:can-gc3-en|CAN-GC3]] | [[:can-gc4-en|CAN-GC4]] | [[:can-gca5-en|CAN-GC5]] | [[:can-gc6-en|CAN-GC6]] | [[:can-gc7-en|CAN-GC7]] | [[:can-gc8-en|CAN-GC8]]
+    * [[:arduino:rcan-en|RCAN-Firmware]]
+    * [[:hardware-en#extension_units|Extension units]]
+ \\
+^Copyright Rob Versluis / Peter Giling^
+ \\
+The CAN-GC2a is an alternative to the CAN-GC2 with the same capabilities communicating over the CANBUS. \\
+This unit uses an Arduino Nano(Every) microcontroller board, instead of the PIC processor.\\
+Since there is still some development going on, please keep coming back here.\\
+Interesting features are coming up.\\
+ \\
+===== The Board =====
+A jumper makes it possible to set terminator on the last board in the CANBUS chain.\\
+This jumper connects a 120 Ohm resistor to the CANBUS.\\
+White connectors at the back are compatible with all [[:mgv-overview-en|GCA(MGV)xx interfaces]].\\
+These interfaces are mostly electrical isolated from CANBUS by optocouplers.\\
+Power, as available in CANBUS-cable, is only used for supply of CANBUS board itself.\\
+As a standard recommandation for all CAN systems, connection and disconnection of cables is not possible while system is running.\\
+Using this cheap and rigid d-type connector with locking screws will avoid that connectors drop off accidently.\\
+===== Nano & Nano Every =====
+The Nano cannot use the A6 and A7 pins as output. (Port J4-9 and J4-10)\\
+Nano Every is able to use port 9 and 10 also as output.\\
+Only Every is supported.\\
+===== X1 16MHz =====
+Recommended is to use a 16MHz crystal for the MCP2515 operating speed.\\
+===== Improved supply =====
+More and more, switching power regulators come within reach of us railroad enthousiasts.\\
+The widely popular 7805 5V regulator can be replaced with a switching regelulator like R-78E-5.\\
+The costs are higher, but the advantage is a far better effiency in the power part of this board.\\
+The 1 Amp type can really 'transform' the 12-17V supply in the CAN network to 5 Volt and deliver 1 Amp continue load\\
+without getting serously hot.\\
+It is a big improvement, and the CAN-GC2a kit will contain that chip.\\
+===== The Arduino sketch =====
+For source code and compiling read this chapter: **[[:arduino:rcan-en|RCAN]]**\\
+===== HEX Files =====
+====Nano Every====
+  * https://gitlab.com/rocrail/Arduino/-/tree/master/RCAN/build
+===== The hardware =====
+\\
+^  Files  ^
+| {{ :cbus:can-gc2a_orc_sch.pdf |The schematics}}  |
+| {{ :cbus:can-gc2a_sch.pdf |The schematics}}  |
+| {{ :cbus:can-gc2a_pcb.pdf |The pcboard and parts positions}}  |
+| {{ :cbus:can-gc2a_every_parts.pdf |The partslist}}  |
+| {{ :cbus:can-gc2a_gerber.zip |Gerber files}}  |
+^  N.B. Only complete ordered kits will be supported!  ^
+\\
+====Connections====
+  * [[:cbus:overview-en#connection_cable|CAN-GC cables]]
+  * For connection with interfaces, see instructions in propriate interface.
+ \\
+===== Connector J3 10 pin header =====
+|< >|
+^ I/O port ^ Connector Pin ^  Remark  ^
+|  +5V  |  1  |
+|  GND  |  2  |
+|  1  |  3  |
+|  2  |  4  |
+|  3  |  5  |
+|  4  |  6  |
+|  5  |  7  |
+|  6  |  8  |
+|  7  |  9  |
+|  8  |  10  |
+\\
+===== Connector J4 10 pin header =====
+|< >|
+^ I/O port ^ Connector Pin  ^  Remark  ^
+|  +5V  |  1  |  |
+|  GND  |  2  |  |
+|  9  |  3  |  input only on the Nano Classic((Use the Nano Every))  |
+|  10  |  4  |  input only on the Nano Classic((Use the Nano Every))  |
+|  11  |  5  |  |
+|  12  |  6  |  |
+|  13  |  7  |  |
+|  14  |  8  |  |
+|  15  |  9  |  |
+|  16  |  10  |  |
+===== Direct connection of leds to outputs=====
+[[http://wiki.rocrail.net/doku.php?id=mgv-overview-en#direct_connection_of_led_s|Led connection]]
+\\
+===== Reed switches and hall sensors =====
+Read switches and hall sensors can be used as feed-back sensors.\\
+However, since the contact information inside the CAN-GC2a is arranged so that the unit is\\
+low sensitive for distorsions, the minimum pulse lenght should be at least 50 miliSecs to be accepted (0.05 second).\\
+In addition to that, reed-contacts usually give more than 1 pulse when activated, known as 'contact dender'.\\
+For this way of sensoring, a special pulse-extender will be available inside the firmware.\\
+This option is indicated as 'BK'.\\
+\\
+===== Hardware for CAN-GC2a =====
+Boards and complete kits are available from www.phgiling.net.\\
+The programming of the Arduino nano itself can be done via USB port.\\
+ \\
+<html><a name="setup"/></html>
+===== Setup =====
+{{:cbus:cbus-gc2.png}}\\
+====Reset EEPROM====
+Hold down the button at power on to reset/initialize the EEPROM with following settings:
+  * port 1-8 switch with address 1-8
+  * port 9-16 block with address 9-16
+The same can be achieved by sending a **[[:cbus:flim-en#clear_all|Clear]]** command.\\
+====Set====
+Set the first found change. This button must be pushed multiple if more then one port or setting is changed.\\
+The sequence of change check is:
+  - Ports
+  - Node configuration
+  - SoD
+====Set all====
+Set all ports and options.\\
+====Save output state====
+Write the output state in EEPROM after detecting a **power off command** on the CANBUS.\\
+The outputs will be restored after the [[:can-gca2a-en|CAN-GC2a]] is powered on.\\
+====Short events====
+Ignore the event node number and compare the event number only.\\
+====Long events====
+For long events the BUS variable on the interface tab of sensors, switches and other objects is used to address the module its node number.\\
+The address variable is equal to the one used with short events.\\
+====SoD====
+**"Start of Day"**\\
+The [[:can-gca2a-en|CAN-GC2a]] will report the status of every input after receiving an accessory command with this address. (Short event)\\
+The SoD address should be the same as set for the __**[[:cbus-en#sod|Controller]]**__ and can be tested with the **SoD** button.\\
+====Node Nr.====
+For outputs with long events only.\\
+Inputs will use the **[[:cbus:flim-en#node_number|CAN-GC2a]]** node number for events.
+====Port types====
+^ Type ^^ Description ^ Recommendation ^
+| **IN** | Input | Normal input port. | Push buttons, feedback of servos/points and hall sensors. |
+| **BK** | Block | Input with a 2 seconds delayed off. (±50ms) | Occupancy detectors. |
+| **SW** | Switch | Continuous output. | Single coil switch drivers like servos. |
+| **PU** | Pulse | Output with x ms activation time. (±50ms) | Note: A [[:switch-int-en#switch_time|software timed off]] is not possible with CANBUS; It is realized in the hardware. | \\
+====Pulse time====
+Activation time for pulse type outputs.\\
+====Inv====
+Inverts the port.\\
+ \\
+====Test====
+Every port has a test button in which also the current state is displayed as a "1" or "0".\\
+The state is only updated after pushing a test button.\\
+ \\
+====Usage====
+Shows the Rocrail object ID which is linked to this port.\\
+ \\
+====LEDs====
+The information of the LEDs is explained on the firmware page: **[[:cbus:can-gca2-firmware#leds|LEDs]]**\\
+ \\
+=====Node Variables=====
+^ NV# ^ Purpose ^
+|  1  | General configuration |
+|  2...17  | Port configuration |
+|  18  | CAN ID |