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NotSkymachine | anyone know much about their snap on? | 02:06 |
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warter | is there an official way for documenting source code? Doxygen? Docbook? | 11:29 |
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jbocklag | and under what licence should AGL source code be written? | 11:38 |
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CTtpollard | are you about leon-anavi-cloud? | 15:58 |
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parco | any ideas where i can find people who have dealt with j1939 and trucks? | 20:55 |
parco | i've been searching for weeks | 20:55 |
parco | for a relay chat type medium | 20:56 |
rjek | What is a j1939? | 21:07 |
rjek | This channel is /mostly/ about entertainment systems | 21:07 |
parco | entertainment systems? | 21:13 |
parco | like installing radios and such? | 21:13 |
bjones | more like touchscreen media centers | 21:14 |
parco | j1939 is a protocol that overlays the CAN network on heavy duty trucks | 21:14 |
parco | am i in the completely wrong place? | 21:14 |
paulsherwood | possibly, possibly not... there are folks here who work wity CAN, for sure | 21:15 |
rjek | I don't know of a better place, but I don't think it's most people's expert subject matter here. | 21:15 |
parco | well in your experience with CAN for cars, is it typical that the engine broadcasts a message when it is started? | 21:16 |
paulsherwood | but this is not a great week to engage... there's a get-together in Paris, lots of regulars are there | 21:16 |
* paulsherwood is not a CAN wizard, sadly | 21:16 | |
* bjones wishes he was in Paris :D | 21:16 | |
rjek | Nobody is ;-) | 21:16 |
parco | shucks | 21:18 |
parco | what i'm afraid of is that the actual events on the j1939 are undefined by the spec, and left up to the manufacturer | 21:19 |
parco | it's starting to seem that way | 21:19 |
rjek | CAN can be like that too | 21:20 |
rjek | It's not rigorously standardised from the point of view of messages, just how the messages get about. | 21:20 |
parco | rjek: yep exactly | 21:20 |
rjek | And it's not normally introspectable | 21:21 |
parco | j1939 totally is | 21:21 |
parco | well i imagine that's what the point of j1939 is, to make a CAN network standardised | 21:22 |
parco | and introspectable, for use with on-board monitoring devices | 21:22 |
rjek | Is it a protocol that just uses CAN as its transport, as HTTP does TCP? | 21:22 |
parco | rjek: yep, it creates these parameters called PGN's from the CAN ID | 21:23 |
parco | and each PGN has a set of parameters, like engine speed, engine hours etc | 21:23 |
rjek | It may still be vehicle and manufacturer specific how they use CAN to transfer the j1939 messages of course. | 21:23 |
parco | i'm more interested in when at this point | 21:25 |
parco | i've written all the drivers to deal with different types of j1939 messages, but now onto the crunching. I don't know if i need to be polling or just listening for broadcasts :/ | 21:25 |
rjek | CAN is normally broadcast with a controller that filters the messages you're interested in, in my very limited experience | 21:27 |
rjek | I need to go to bed! Good night and good luck! | 21:28 |
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leon-anavi-cloud | Hi CTtpollard, I arrived today at the hotel. Are you here too? I hope we see each other tomorrow | 22:36 |
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