I noticed on the CerbBee that there is a CAN1_RX (pin7) and CAN1_TX (pin9) on the third port (x3) Are these usable CAN bus pins or is additional stuff needed to make this work? It’s just those plus common ground right?
As a side note is the CAN_TX pin Open Drain or Push Pull?
You need to add a transceiver chip like the MCP2551 to use CAN communication.
However it is possible to use CAN without a transceiver for MC to MC communication if both are on the same PCB.
@ David@ Leclanche - They are 5 inches from each other, and there are only 2
Then you could go this way [url]http://www.mikrocontroller.net/attachment/28831/siemens_AP2921.pdf[/url]
(image 2)
@ David@ Leclanche - yes, but another article I was reading said that the fast diodes needed could introduce substantial noise into the system.
I’m looking at low speed 100Kbps.
Did CAN bus exist back in Fez Domino days?
well before that !
Before Domino, GHI produced a device called CANxtra, for guess what, CAN diagnostics (I suspect Automotive)
Cool so I should find the same CAN bus functionality in the Cerb’s 4.3 framework on the Domino’s 4.1 framework.
No, you should expect to see the 4.1 capability in the Domino’s framework. They may have changed. But according to this https://www.ghielectronics.com/catalog/product/116 you will see CAN capability, yes.