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+====== CAN-GC2 Universal 16 bits I/O node for Cbus ======
+[[:english|{{  rocrail-logo-35.png}}]]
+[[:english|Content]] -> [[:english#hardware|Hardware]] -> [[:english#merg_cbus|MERG CBUS]]
+  * [[:cbus:overview-en|CAN-GC Overview]]
+  * [[:can-gca1-en|CAN-GC1]] | [[:can-gca1e-en|CAN-GC1e]] | **[[:can-gca2-en|CAN-GC2]]** | [[: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]]
+    * **[[:cbus:can-gca2-firmware|Firmware]]**
+    * [[:cbus:flim-en#can-gc2|FLiM Setup]]
+ \\
+This page documents the HEAD revision of the firmware.\\
+ \\
+===== Firmware =====
+==== Copyrights ====
+(c) [[http://www.merg.org.uk/|MERG]]\\
+(c) [[http://www.rocrail.net|Rob Versluis, rocrail.net]]\\
+==== IDs ====
+| NMRA Manufacturer ID |  70 |
+| Product ID |  2 |\\
+==== HEX ====
+  * Version: **2-2a** , resonator: **4MHz**
+  * https://launchpad.net/rocrail-hardware/+download
+==== Sources ====
+  * https://github.com/rocrail/GCA/tree/master/cbus
+ \\
+===== Node Variables =====
+^ # ^ Description ^
+|  1 | node configuration |
+|  2-17 | Port 1-16 configuration |
+|  18 | state of port 1-8  (read only) |
+|  19 | state of port 9-16  (read only) |
+|  20 | CAN-ID |
+ \\
+===== Node configuration byte =====
+^ Bit ^  Function  ^
+|  0 | save output states at power off command |
+|  1 | use short events |
+|  2, 3 | pulse time: 0x00=250ms, 0x04=500ms, 0x08=1000ms, 0x0C=2000ms |
+ \\
+===== Port configuration byte =====
+^ Bit |  Function  ||
+|  0 ^ 1=Input ^ 0=Output ^
+|  1 | 0=direct reporting\\ 1=delayed reporting for occupancy detection. | 0=pulse\\ 1=continuous |
+|  2 | 1=inverted ||
+ \\
+===== Node Events =====
+  * Inputs will generate OPC_ACON/OPC_ACOF events.
+  * IR-Inputs will generate OPC_ACON3 events with loco address in extra byte 5-6 and the train category in 7.
+  * A "Start of Day" event will trigger all inputs to report their status.
+  * Outputs will change status on OPC_ACON/OPC_ACOF.
+^ Event# ^ Description ^ Variable ^
+|  0-15 | port 1...16 | not used |
+|  16 | SoD (start of day) | not used |
+ \\
+===== I/O Mapping =====
+^ Poort ^ PICbit ^ Connector ^
+|   CAN | RB2/RB3 | - |
+|   FLiM switch | RA2 | - |
+|   LED1 | RB6 | - |
+|   LED2 | RB7 | - |
+|   LED3 | RB5 | - |
+|   1 | RA0 | J4 |
+|   2 | RA1 | J4 |
+|   3 | RA3 | J4 |
+|   4 | RA4 | J4 |
+|   5 | RA5 | J4 |
+|   6 | RB0 | J4 |
+|   7 | RB1 | J4 |
+|   8 | RB4 | J4 |
+|   9 | RC0 | J3 |
+|  10 | RC1 | J3 |
+|  11 | RC2 | J3 |
+|  12 | RC3 | J3 |
+|  13 | RC7 | J3 |
+|  14 | RC6 | J3 |
+|  15 | RC5 | J3 |
+|  16 | RC4 | J3 |
+ \\
+=====Supported Opcodes=====
+^ Request ^ Response ^ Remark ^
+| OPC_ASRQ | OPC_ARON,OPC_AROF |
+| OPC_ACON | - |  |
+| OPC_ASON | - |  |
+| OPC_ACOF | - |  |
+| OPC_ASOF | - |  |
+| OPC_RQNPN | OPC_PARAN |
+| OPC_SNN | - |
+| OPC_RQNP | OPC_PARAMS |
+| OPC_RTOF | - |
+| OPC_NVRD | OPC_NVANS |
+| OPC_NVSET | - |
+| OPC_NNLRN | - |
+| OPC_NNULN | - |
+| OPC_EVLRN | - |
+| OPC_NERD | OPC_ENRSP |
+| OPC_NNCLR | - | [[:cbus:flim-en#reset_eeprom|Reset EEPROM]] |
+| OPC_QNN | OPC_PNN | [[:cbus:flim-en#query|Query]] |
+ \\
+^ Unsolicited ^
+| OPC_ASON,OPC_ASOF |
+ \\
+===== LEDs =====
+^ LED# ^ Color ^ Information ^ Remark ^
+| 1 | green | CBUS activity. | With an off delay of 50ms which does not show the actual traffic on the CAN bus; Its just a human friendly indicator. |
+| 2 | yellow | Event learning mode. | Blinking at a rate of 1Hz, otherwise this LED is off. Triggered by the FLiM switch. |
+| 3 | red | Firmware started running the main loop. | There is a hardware/firmware problem if this LED does not illuminate. \\ It is normal that this LED flickers at CBUS activity; The main loop is interrupted. |
+{{:cbus:gc2-pcb.png}}
+ \\
+===== Development Tools =====
+  * MPLAB X v1.00
+  * C18 v3.40
+  * PICKit 3
+  * **[[:pic-adap-en|PICKit3 Adapter]]**

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