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RaceChronoDiyBleDevice
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Minor tweak

This commit is contained in:
Timur Iskhodzhanov 2021-07-24 21:17:55 -07:00
parent 934b18ef1b
commit 360c05fb7e
1 changed files with 2 additions and 3 deletions
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can_db/mazda_mx5_nd.md
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@ -20,7 +20,7 @@ Steering angle | 134 | `(16000 - bytesToUInt(raw, 0, 2)) * 0.1` | Positive value
Speed | 514 | `bytesToInt(raw, 2, 2) / 360.0` |
Engine RPM | 514 | `bytesToUInt(raw, 0, 2) / 4` | If someone records >8192 rpms to confirm, let me know :)
*Note*
*Note about the "Brake position (%)" channel.*\
The binary representation used for the brake pedal/pressure is very weird.
In my limited testing, I've observed the values of 149...154 when not touching
the brake pedal. Most of the time it stays as 154. When progressively pressing
@ -28,8 +28,7 @@ the brake pedal, the number goes up to 255, then wraps around to 0, and keeps
going up. I've observed values as high as 145 when heavy braking, and ~135 when
braking hard enough to engage ABS. It very much feels like the representation is
`(cast_to_int(brake_pressure * multiplier) + offset) % 255`, as long as we allow
the `brake_pressure` to go slightly negative.
the `brake_pressure` to go slightly negative.\
Now out of all 0...255 possible values, this leaves us with only 146...148
values that I haven't observed. For now, I've made an assumption that 146 is
"braking even harder than I was ever able to brake", and 147 and 148 are just