Updated PCAN documentation

Fixes #56

doc/interfaces/pcan.rst

@@ -3,27 +3,47 @@
 PCAN Basic API
 ==============
 
-.. warning::
+Interface to `Peak-System <https://www.peak-system.com/?&L=1/>`__'s PCAN-Basic API.
 
-    This ``PCAN`` documentation is a work in progress. Feedback and revisions are most welcome!
+Windows driver: https://www.peak-system.com/Downloads.76.0.html?&L=1
 
+Linux driver: https://www.peak-system.com/fileadmin/media/linux/index.htm
 
-Interface to `Peak-System <http://www.peak-system.com/>`__'s PCAN-Basic API.
+Mac driver: http://www.mac-can.com
 
 Configuration
 -------------
 
-An example `can.ini` file for windows 7:
+Here is an example configuration file for using `PCAN-USB <https://www.peak-system.com/PCAN-USB.199.0.html?&L=1>`_:
 
 ::
 
     [default]
     interface = pcan
     channel = PCAN_USBBUS1
+    state = can.bus.BusState.PASSIVE
+    bitrate = 500000
 
+``channel``: (default PCAN_USBBUS1) CAN interface name
+
+``state``: (default can.bus.BusState.ACTIVE) BusState of the channel
+
+``bitrate``: (default 500000) Channel bitrate
+
+Valid ``channel`` values:
+
+::
+
+    PCAN_ISABUSx
+    PCAN_DNGBUSx
+    PCAN_PCIBUSx
+    PCAN_USBBUSx
+    PCAN_PCCBUSx
+    PCAN_LANBUSx
+
+Where ``x`` should be replaced with the desired channel number starting at 1.
 
 Bus
 ---
 
 .. autoclass:: can.interfaces.pcan.PcanBus
-