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| bmw-motorrad-can-bus:start [2023/01/21 07:19] – vdesmedt | bmw-motorrad-can-bus:start [2023/01/21 07:39] (current) – vdesmedt | ||
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| === Introduction === | === Introduction === | ||
| - | There is initially two goals to this starting investigation : one is to use extract data from the system just because I can’t stand the idea that there is plenty of data in there that i cannot access (call it a principle ;)) and the other, much more concrete is that, after my bike fall the very first day I had it, the button to turn the 4 blink light stop working. It’s not a button that you need a lot but when you need it, you really do, and so I thought if I could reproduce what this button do programmatically, | + | There is initially two goals to this starting investigation : one is to extract data from the system just because I can, and the other, much more concrete is that, after my bike fall the very first day I had it, the button to turn the 4 blink light stop working. It’s not a button that you need a lot but when you need it, you really do, and so I thought if I could reproduce what this button do programmatically, |
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| + | So far, my understanding is that ODB2 is a standard way (a protocole) to establish dialog with various MCU’s and devices within a vehicule. It defines how to « talk » with the different MCU in the vehicule and define standard way to report problems depending on it source, nature and criticality. It also include the definition of a connector, defining its shape and to what are all its pin connected | ||
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| + | CAN is a low level communication protocol that defines low level details as how many wires do you need, what are the different voltages used on those wires, how is a bit transported on this wires, how those bits finally make a byte or more, how are collision detected and resolved (when two devices want to talk at the same time), … | ||
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| + | ODB2 protocole can be « transported » in different ways, CAN Bus being one of them. | ||
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| + | Let’s dig a little… | ||
| === Starting point === | === Starting point === | ||