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Feature: joystick weights (#21883)

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Co-authored-by: Nick Brassel <nick@tzarc.org>
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Dalius Dobravolskas 2023-12-01 11:30:36 +02:00 • committed by GitHub
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19
docs/feature_pointing_device.md
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@ -69,10 +69,29 @@ The Analog Joystick is an analog (ADC) driven sensor. There are a variety of jo
| `ANALOG_JOYSTICK_Y_AXIS_PIN` | (Required) The pin used for the horizontal/Y axis. | _not defined_ |
| `ANALOG_JOYSTICK_AXIS_MIN` | (Optional) Sets the lower range to be considered movement. | `0` |
| `ANALOG_JOYSTICK_AXIS_MAX` | (Optional) Sets the upper range to be considered movement. | `1023` |
| `ANALOG_JOYSTICK_AUTO_AXIS` | (Optional) Sets ranges to be considered movement automatically. | _not defined_ |
| `ANALOG_JOYSTICK_SPEED_REGULATOR` | (Optional) The divisor used to slow down movement. (lower makes it faster) | `20` |
| `ANALOG_JOYSTICK_READ_INTERVAL` | (Optional) The interval in milliseconds between reads. | `10` |
| `ANALOG_JOYSTICK_SPEED_MAX` | (Optional) The maximum value used for motion. | `2` |
| `ANALOG_JOYSTICK_CLICK_PIN` | (Optional) The pin wired up to the press switch of the analog stick. | _not defined_ |
| `ANALOG_JOYSTICK_WEIGHTS` | (Optional) Use custom weights for lever positions. | _not defined_ |
| `ANALOG_JOYSTICK_CUTOFF` | (Optional) Cut off movement when joystick returns to start position. | _not defined_ |
If `ANALOG_JOYSTICK_AUTO_AXIS` is used, then `ANALOG_JOYSTICK_AXIS_MIN` and `ANALOG_JOYSTICK_AXIS_MAX` are ignored.
By default analog joystick implementation uses `x^2` weighting for lever positions. `ANALOG_JOYSTICK_WEIGHTS` allows to experiment with different configurations that might feel better.
E.g. This is weights for `((x-0.4)^3+0.064)/0.282`:
```c
#define ANALOG_JOYSTICK_WEIGHTS {0,2,4,5,7,8,9,10,12,13,14,15,15,16,17,18,18,19,19,20,20,21,21,21,22,22,22,22,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,24,24,24,24,24,24,25,25,25,26,26,26,27,28,28,29,29,30,31,32,33,34,35,36,37,38,40,41,43,44,46,48,49,51,53,56,58,60,62,65,68,70,73,76,79,82,85,89,92,96,100}
```
You can use following JS code to generate weights for different formulas:
```js
JSON.stringify(Array.from(Array(101).keys()).map(x => Math.ceil((((x/100-0.4)**3+0.064)/0.282*100))))
```
### Azoteq IQS5XX Trackpad