Luca
c32c4645b5
Tooling and findings for running an E8x/E9x electric power steering unit
outside its donor car, e.g. in an EV conversion.
Headline result: the EPS needs only two CAN messages plus a 12V enable
wire, not the 69-message set the car puts on the bus:
0x130 CAS terminal status (100ms) brings the unit up
0x1A0 DSC road speed (20ms) sets the assist level
Total required rate is 60 frames/s. Protocol write-up, including what is
proven vs. inferred and the open questions, is in eps-comms/.
Contents:
adapters/ CANdapter (its SLCAN dialect differs) and generic SLCAN
gateway/ car<->EPS relay, replay, message bench, EPS controller,
4-tab Streamlit UI
decoder/ PT-CAN frame decoding and live/replay sources
can-io/ XIAO ESP32-S3 firmware: CAN IO board + USB-CAN bridge with
a CAN-independent digital IO channel
tools/ capture, bitrate scan, startup-order and session analysis,
checksum solver
captures/ reference working session + the replay set eps_control reads
31 lines
881 B
Text
31 lines
881 B
Text
# Python
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__pycache__/
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*.py[cod]
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.venv/
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venv/
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*.egg-info/
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# macOS
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.DS_Store
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# PlatformIO build output and local IDE state (can-io/firmware)
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.pio/
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.pioenvs/
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.piolibdeps/
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.vscode/
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!.vscode/extensions.json
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# Streamlit
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.streamlit/secrets.toml
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# ---------------------------------------------------------------- captures --
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# Session logs are large (tens of MB) and regenerable by re-running a test,
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# so they stay out of git. The two reference captures below are excluded
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# from this rule because they are inputs, not outputs:
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# - replay_car_to_eps_*.csv is what gateway/eps_control.py reads to get
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# genuine per-terminal-state frames; without it the EPS can't be driven.
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# - gateway_20260829_164540.csv is the reference working session every
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# analysis in eps-comms/ refers back to.
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captures/*.csv
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!captures/replay_car_to_eps_*.csv
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!captures/gateway_20260829_164540.csv
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