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+====== CAN-GC1 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]]
+    * **[[:cangc1-firmware-en|Firmware]]**
+ \\
+| :!: The PC interface is __not CBUS compatible__ and works with Rocrail only. | \\
+===== Copyrights =====
+(c) [[http://www.merg.org.uk/|MERG]]\\
+===== HEX =====
+This firmware needs a Rocrail [[:cbus-en#setup|CBUS Setup]] for serial and 230400 bps. (-0,79% tolerance: 228571 bps)\\
+Resonator: **8MHz**, Rocrail 2931+.
+  * https://wiki.rocrail.net/lib/exe/fetch.php?media=cbus:can-gc1.zip
+====Note====
+Most RS232 legacy ports cannot handle baud rates above 115200.\\
+To use the needed 230400 baud rate an **[[:usb-rs232-en|USB-232 converter]]** is the best solution.\\
+The CAN-GC1 can be equipped with an USB Sub-D type connector.
+===== Sources =====
+Compile with the "Case sensitive" option!
+  * https://gitlab.com/rocrail/GCA/-/tree/master/cbus
+ \\
+=====Binary Response=====
+The official CBUS protocol is in ASCII which doubles the number of bytes.\\
+To prevent frame loss the response from the CAN-GC1 to Rocrail has been made binary.\\
+An ASCII response starts with "**:S**" and a binary with "**:s**".\\
+====Frame ASCII format====
+<code>
+:ShhhhNd0d1d2d3d4d5d6d7d; :XhhhhhhhhNd0d1d2d3d4d5d6d7d; :ShhhhR; :SB020N;
+:S    -> S=Standard X=extended start CAN Frame
+hhhh  -> SIDH<bit7,6,5,4=Prio bit3,2,1,0=high 4 part of ID> SIDL<bit7,6,5=low 3 part of ID>
+Nd    -> N=normal R=RTR
+d    -> OPC 2 byte HEXA
+d-7d -> data 2 byte HEXA
+;     -> end of frame
+</code>
+====Frame Binary format====
+<code>
+:shhNd0d1d2d3d4d5d6d7d;
+:s    -> s=Standard start CAN Frame
+hh    -> SIDH<bit7,6,5,4=Prio bit3,2,1,0=high 4 part of ID> SIDL<bit7,6,5=low 3 part of ID> 2 bytes
+Nd    -> N=normal R=RTR 1 byte
+d    -> OPC 1 byte
+d-7d -> data 1 byte
+;     -> end of frame (should be a checksum in future versions)
+</code>
+Applications should read up to the OPC to determine the data length.\\
+===== Development Tools =====
+  * MPLAB X v1.00
+  * mpasm v5.43
+  * PICKit 3
+  * **[[:pic-adap-en|PICKit3 Adapter]]**