8000 Some CAN info updates for GEN2 brz by cocafe · Pull Request #13 · timurrrr/ft86 · GitHub
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Some CAN info updates for GEN2 brz #13

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Some CAN info updates for GEN2 brz #13

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20 changes: 19 additions & 1 deletion can_bus/gen2.md
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Expand Up @@ -128,6 +128,7 @@ Example values:\
Channel name | Equation | Notes
------------ | -------- | -----
Engine RPM | `bitsToUIntLe(raw, 16, 14)` |
Neutral gear | `D & 0x80` |Bit `7` is set (aka, `0x80`) when gear is at neutral.
Accelerator position | `E / 2.55` |
Accelerator position | `F / 2.55` | Same value as `E`, until you press and hold both accelerator and brake, then 0.
Accelerator position | `G / 2.55` | Same as `F`.
Expand Down Expand Up @@ -251,6 +252,12 @@ Example values:\
`0x 7C 1B CE 42 09 01 00 00` (parked)\
`0x 19 11 68 48 11 00 00 00` (moving slowly)

### CAN ID 0x228 (552)

| Channel name | Equation | Notes |
| ------------ | ---------- | -------------------------------------- |
| Reverse gear | `C & 0x01` | Bit `0` is set when gear is at reverse |

### CAN ID 0x241 (577)

Update frequency: 20 times per second.
Expand Down Expand Up @@ -342,6 +349,17 @@ Low pressure FR | `E & 1` | Ditto
Low pressure RL | `F & 1` | Ditto
Low pressure RR | `G & 1` | Ditto

#### Cars that use kPa for tire pressure (e.g. CN market)

Other values are as the same as above.

| Channel name | Equation | Notes |
| ---------------- | -------------------------------- | ---------------- |
| Tire pressure FL | `lowPass(D >> 1, 126) * 10 / 2` | Result is in kPa |
| Tire pressure FR | `lowPass(E >> 1, 126) * 10 / 2 ` | Ditto |
| Tire pressure RL | `lowPass(F >> 1, 126) * 10 / 2` | Ditto |
| Tire pressure RR | `lowPass(G >> 1, 126) * 10 / 2` | Ditto |

### Typical histogram of CAN IDs

Here's what the distribution 57B5 of CAN IDs looks like in the CAN bus while idling in a
Expand Down Expand Up @@ -403,5 +421,5 @@ parking lot for 10 seconds after driving for 10+ minutes:
---

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