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+====== CAN-GC1e Firmware ======
+[[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]]
+    * **[[:cangc1e-firmware-en|Firmware]]**
+    * [[:cbus:can-protocol|CAN Protocol]]
+ \\
+ \\
+===== Copyrights =====
+  * (c) [[http://www.rocrail.net|Rob Versluis, rocrail.net]]
+  * (c) [[http://www.merg.org.uk/|MERG]]
+  * (c) [[http://www.microchip.com/|Microchip Technology Inc.]] (TCP/IP Stack v3)
+ \\
+===== Protocol =====
+The protocol used over Ethernet will be the same as used for the CANRS and CANUSB: Gridconnect ASCII Frames.\\
+====ASCII Frame====
+<code>
+:Sh1h2Nd0<d1><d2><d3><d4><d5><d6><d7>;
+:     -> Start of frame
+S     -> Frame type: S=Standard, X=Extended, Y=Ethernet
+h1    -> SIDH <bit7,6,5,4=Prio> <bit3,2,1,0=high 4 part of CAN-ID> (2 byte HEXA)
+h2    -> SIDL <bit7,6,5=low 3 part of CAN-ID> (2 byte HEXA)
+N     -> N=normal R=RTR¹
+d0    -> OPC  (2 byte HEXA)
+d1-d7 -> Data (2 byte HEXA)
+;     -> End of frame
+</code>
+¹) RTR = "Request-To-Transmit"; Not used for MergCBUS.
+===Ethernet(Y)===
+The Ethernet Frames are for communication between client and CAN-GC1e only.\\
+^ OPC ^ Description ^ Data ^
+|  0  | Ping; Resets the idle timer. | - |
+|  1  | Status report event.\\ Triggered by the number of connections. | d1: error code\\ d2: number of connections\\ d3: max.¹ CAN queue\\ d4: max.¹ Ethernet queue |
+|  2  | Command Ack with return code, OPC and ticker. | d1: error code\\ d2: the OPC acknowledged\\ d3: ticker (continuous running number from 0 to 255) |
+¹) The highest queue index used so far.\\
+ \\
+^ Error code ^ Description ^
+|  0  | OK |
+|  1  | RC_UNKNOWN_ASCII_FRAME |
+ \\
+Trace snippet:
+<code>
+cbreader OCBUS    1205 Ethernet status: rc=0 con=1 maxcanQ=1 maxethQ=4
+...
+cbreader OCBUS    1215 Ethernet command Ack: rc=0 opc=0x71 cmdticker=28
+</code>
+===Extended(X)===
+Extended frames are used for Boot loading new firmware over the CBUS.\\
+  * {{:cbus:cbus-bootloader.pdf}}
+  * {{:cbus:an247.pdf}}
+ \\
+===== Default settings =====
+At initial startup, first time, the firmware expects EEPROM address 0 to have a value of 0xFF. This will trigger writing the default setup values into EEPROM like IP address, MAC and so on.\\
+If the programmer did overwrite the EEPROM with other values it can be triggered by holding down the pushbutton at power up.\\
+ \\
+===== IDs =====
+| NMRA Manufacturer ID |  70 |
+| Product ID |  11 |
+| Default node number |  11 |
+| Default CanID |  11 |\\
+ \\
+===== Node Variables =====
+^ # ^ Description ^
+|  1 | node configuration |
+|  2 | CAN-ID¹ (Read only) |
+|  3-6 | IP Address |
+|  7-10 | NetMask |
+|  11-16 | MAC Address |
+|  17 | Idle time in 500ms |
+¹) The CAN-ID is token from the frames coming from the PC.\\
+ \\
+==== Node configuration byte ====
+^ Bit ^  Function  ^ Remark ^
+|  0 | Idle time watch dog | This will disconnect a client after reaching the idle timer. |
+|  1 | Power off at idle | Only available in case of an active idle time watch dog. |
+|  2 | Activate command ack. | Every incoming command on the ethernet will be acknowledged using an 'Y' frame. \\ The client may ignore it or use it as handshake for sending a next command. |
+ \\
+===== Binaries =====
+  * https://launchpad.net/rocrail-hardware/+download
+===== Sources =====
+  * https://gitlab.com/rocrail/GCA/tree/master/cbus
+ \\
+===== Development Tools =====
+  * MPLAB X v1.00
+  * C18 v3.40
+  * PICKit 3
+  * **[[:pic-adap-en|PICKit3 Adapter]]**
+ \\