- Is it necessary for all CAN nodes on the network to have same sampling point ???
- how can I verify that my ECU is running at the sampling point which I had set during the hardware initialization?
No. But it's better that way. It means there's one variable less to worry about.
If you must ask, the answer almost certainly is that you can't.
To elaborate on that answer: it takes specially crafted input signals to measure a CAN node's exact sampling point. They have to look almost, but not quite like an actual CAN frame. If you had the tools go generate such signals, I can be assumed you would know how to use them, and not ask the above question.
I believe all but the most paranoid engineers would just take the numbers from the data sheet at face value on an issue like that.
The sampling point has to be set at reasonable value, however it doesn't have to be exactly the same for all nodes.
???? Reading back the CAN configuration registers? Or you are not sure that you figured out the correct values?
DSP and Mixed Signal Design Consultant
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