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Diffstat (limited to 'docs/4-Usage.md')
| -rw-r--r-- | docs/4-Usage.md | 35 |
1 files changed, 31 insertions, 4 deletions
diff --git a/docs/4-Usage.md b/docs/4-Usage.md index cdd8d586..6c6d1380 100644 --- a/docs/4-Usage.md +++ b/docs/4-Usage.md @@ -140,6 +140,20 @@ j1939="can2" > configuration file match those specified in your generated source file with > the `CAN-config-generator`. + + +## Change name of ECU for J1939 + +To change the name of an ECU to J1939, you must go to the file conf.d/cmake/config.cmake and modify the value at : + + +```cmake +# Define name for ECU +set(J1939_NAME_ECU 0x1239) +``` + + + # Run it, test it, use it. You can run the binding using **afm-util** tool, here is the classic way to go : @@ -257,10 +271,18 @@ You can also subscribe to an event with the ID or the PGN of the message definit ```json -low-can subscribe { "id" : 1568} -low-can subscribe { "pgn" : 61442} +low-can subscribe {"id" : 1568} +low-can subscribe {"pgn" : 61442} ``` +And subscribe to all ID or PGN : + +```json +low-can subscribe {"id" : "*"} +low-can subscribe {"pgn" : "*"} +``` + + You can stop receiving event from it by unsubscribe the signal the same way you did for subscribe ```json @@ -325,11 +347,16 @@ and its value. Examples: ```json +# Authentification +low-can auth # Write a raw can frame to the CAN id 0x620 -low-can write { "bus_name": "hs", "frame": { "can_id": 1568, "can_dlc": -8, "can_data": [ 255,255,255,255,255,255,255,255]} } +low-can write { "bus_name": "hs", "frame": { "can_id": 1568, "can_dlc": 8, "can_data": [ 255,255,255,255,255,255,255,255]} } # Write a signal's value. low-can write { "signal_name": "engine.speed", "signal_value": 1256} +# Write J1939 'single frame' +low-can write { "bus_name": "j1939", "frame": { "pgn": 62420, "length":8, "data": [ 255,255,255,255,255,255,255,255]} } +# Write J1939 'multi frame' +low-can write { "bus_name": "j1939", "frame": { "pgn": 62420, "length":9, "data": [ 255,255,255,255,255,255,255,255,254]} } ``` To be able to use write capability, you need to add the permission |