I/O mapping for STM32 Nucleo WB55RG

Airport Wind Station — STM32 Nucleo WB55RG I/O Mapping

These signals connect the Airport Wind Station simulation to the STM32 Nucleo WB55RG through the LabsLand laboratory interface. They are not instructions for wiring arbitrary external hardware. All command and sensor bits are active high. Mbed spells pin PA6 as PA_6; STM32 HAL uses port GPIOA and pin GPIO_PIN_6.

Simulation to STM32

• Fixed slot 0 — Reserved: PC13 (Mbed PC_13). Ignore; not the controller reset.
• Fixed slot 1 — inputCode[0]: PA6 (Mbed PA_6). Least-significant wind-code bit.
• Fixed slot 2 — inputCode[1]: PB9 (Mbed PB_9). Most-significant wind-code bit.
• Fixed slot 3 — Reserved: PB8 (Mbed PB_8). Ignore.
• Fixed slot 4 — aligned: PC12 (Mbed PC_12). High when the turbine is aligned with the wind.

STM32 to simulation

• Fixed slot 0 — align: PC4 (Mbed PC_4). Request yaw toward the wind.
• Fixed slot 1 — Reserved: PD0 (Mbed PD_0). Drive low.
• Fixed slot 2 — generatorEnable: PD1 (Mbed PD_1). Request generation.
• Fixed slot 3 — active: PB0 (Mbed PB_0). Turbine active.
• Fixed slot 4 — runwayWindAlert: PB1 (Mbed PB_1). High-wind alert.

Preserve all five slots in each direction, including the unused ones. Configure the sensor pins as inputs and command pins as outputs. Initialize outputs low before running the controller. Never configure a simulation-driven input as an output. In HAL, enable the GPIO port clocks before initialization.

Wind encoding and timing

Combine the inputs as (PB9 << 1) | PA6: 01 calm, 10 steady, 11 high wind, 00 reserved/non-generating safe stop. Generation requires steady wind and confirmed alignment. The usage guide on the simulation page defines the complete operating requirements.

Advance the state machine once per second with a non-blocking timer, while continuing to sample the inputs and update the high-wind alert. The Mbed reference samples approximately every 5 ms; do not put the whole controller behind a one-second blocking delay. Keep the reserved output PD0 low.

Controller reset

Use the target's normal reset/reboot mechanism. Start the controller in STOPPED with yaw, generation and active commands low; then respond to the current plant inputs. No external reset input is assigned to PC13.

The browser's Restart activity button resets the simulated plant, not the STM32 program. Conversely, resetting the STM32 does not reset the wind or turbine geometry. Test both operations separately.

Credits

Airport Wind Station is a REDTAIL activity developed with RHLAB at the University of Washington and integrated with LabsLand. 3D modeling and simulation development: Zhiyun (ZZ) Zhang. Concept development, firmware development and system integration: Luis Rodríguez Gil. Contributions to the activity specification: Brian Chap. Project leadership and direction, and REDTAIL principal investigator: Professor Rania Hussein. See the usage guide for full acknowledgments.