Wiper (two-bit) STM32 Nucleo WB55RG I/O mappings
===============================================

All signals are active high. The direction shown is relative to the STM32.

| Runtime signal | Meaning in the current simulation | Type | GPIO | STM32 HAL name |
|---|---|---|---|---|
| `rainSensor` | Rain is active | STM32 input | PC_13 | `GPIOC`, `GPIO_PIN_13` |
| `rightSensor` | Wiper is at the **left-hand** limit | STM32 input | PA_6 | `GPIOA`, `GPIO_PIN_6` |
| `leftSensor` | Wiper is at the **right-hand** limit | STM32 input | PB_9 | `GPIOB`, `GPIO_PIN_9` |
| `mButton` | The interface's M button is being pressed | STM32 input | PB_8 | `GPIOB`, `GPIO_PIN_8` |
| `pButton` | The interface's P button is being pressed | STM32 input | PC_12 | `GPIOC`, `GPIO_PIN_12` |
| `move1` | First movement-control signal | STM32 output | PC_4 | `GPIOC`, `GPIO_PIN_4` |
| `move2` | Second movement-control signal | STM32 output | PD_0 | `GPIOD`, `GPIO_PIN_0` |

The command pair is written in `(move1, move2)` order:

| `move1` / PC_4 | `move2` / PD_0 | Result |
|---|---|---|
| 0 | 0 | Stop |
| 0 | 1 | Move toward the right-hand limit |
| 1 | 0 | Move toward the left-hand limit |
| 1 | 1 | Error state |

The current two-bit simulation publishes the endpoint channels with their
runtime names reversed: `rightSensor` reports the physical left-hand limit and
`leftSensor` reports the physical right-hand limit. This is different from the
one-bit Wiper. Use the endpoint meanings in the table above when implementing a
controller. Between the endpoints, both endpoint sensors can be low.