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update gear info for AT model #15

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update gear info for AT model #15

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72739f9
update gear info for AT model
cocafe Jul 29, 2025
b6cfc22
update forumla style
cocafe Jul 29, 2025
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34 changes: 30 additions & 4 deletions can_bus/gen2.md
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Expand Up @@ -128,7 +128,7 @@ Example values:\
Channel name | Equation | Notes
------------ | -------- | -----
Engine RPM | `bitsToUIntLe(raw, 16, 14)` |
Neutral gear | `D & 0x80` | `0x80` when transmission is in neutral. (at least on MT cars)
Neutral gear | `D & 0x80` | `0x80` when transmission is in neutral. Works for both MT and AT.
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 All @@ -146,6 +146,32 @@ Channel name | Equation | Notes
------------ | -------- | -----
A/C fan clutch | `H & 0x2` | 2 is engaged, 0 is disengaged

### CAN ID 0x48 (72)

This channel only available on AT model.

And it contains AT related data.

Example values:\
`40 46 36 49 40 ec 07 00` (S3)\
`77 4f 27 51 40 20 08 00` (S4)\
`ab 46 4a 99 2e 02 0a 00` (M3)\
`d9 49 27 a1 4a 30 06 00` (M4)\
`f8 49 8a 02 10 c8 03 00` (N)\
`d9 4f 8a 04 10 a1 03 00` (P)\
`b0 4b 7b 03 10 8d 02 00` (R)\

| Channel name | Equation | Notes |
| ------------ | ---------------------------------------------- | ------------------------------------------------------------ |
| N engaged | `(D & 0x02) == 0x02` | |
| P engaged | `(D & 0x04) == 0x04` | |
| R engaged | `(D & 0x03) == 0x03` | |
| D engaged | `D == 0x79` | |
| M engaged | `D & 0x80` | Manual Mode. |
| Gear (M) | `if((D & 0x80), (D & 0x38 >> 3), NaN)` | Mask 0x38 for gear under M mode. |
| S engaged | `(D & 0x03) == 0x01` | Sports Mode. Bit `0` flags sport mode. |
| Gear (S) | `if((D & 0x01), (((D & 0x78) >> 3) - 6), NaN)` | Mask 0x78 for gear under S mode, `- 6` to get actual gear position. |

### CAN ID 0x118 (280)

Update frequency: 50 times per second.
Expand Down Expand Up @@ -254,9 +280,9 @@ Example values:\

### CAN ID 0x228 (552)

| Channel name | Equation | Notes
| ------------ | ---------- | -----------------------------------
| Reverse gear | `C & 0x01` | `1` when transmission is in reverse. (at least on MT cars)
| Channel name | Equation | Notes|
| ------------ | ---------- | -----------------------------------|
| Reverse gear | `C & 0x01` | `1` when transmission is in reverse. Works for both MT and AT. |

### CAN ID 0x241 (577)

Expand Down