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boards: add support for Gear Up AirBrainH743

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Julian Oes
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docs/en/flight_controller/autopilot_manufacturer_supported.md
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- [CubePilot Cube Orange+](../flight_controller/cubepilot_cube_orangeplus.md)
- [CubePilot Cube Orange](../flight_controller/cubepilot_cube_orange.md)
- [CubePilot Cube Yellow](../flight_controller/cubepilot_cube_yellow.md)
- [Gear Up AirBrainH743](../flight_controller/gearup_airbrainh743.md)
- [Holybro Kakute H7v2](../flight_controller/kakuteh7v2.md)
- [Holybro Kakute H7mini](../flight_controller/kakuteh7mini.md)
- [Holybro Kakute H7](../flight_controller/kakuteh7.md)
docs/en/flight_controller/gearup_airbrainh743.md
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# Gear Up AirBrainH743
:::warning
PX4 does not manufacture this (or any) autopilot.
Contact the [manufacturer](https://takeyourgear.com/) for hardware support.
:::
::: info
This flight controller is [manufacturer supported](../flight_controller/autopilot_manufacturer_supported.md).
:::
For more information and pinout, check the [GitHub documentation](https://github.com/GearUp-Company/AirBrainH743).
## Key Features
- MCU: STM32H743 32-bit processor running at 480 MHz
- IMU: ICM42688P
- Barometer: DPS310
- Magnetometer: LIS2MDL (internal)
- 128MB NAND Flash for logging (W25N)
- 7x UARTs
- I2C, SPI
- 9x PWM Outputs (8 Motor outputs, 1 LED strip)
- Battery input voltage: 3S-10S
- Battery voltage/current monitoring
- 5V@2A and 10V@2.5A BEC outputs
- USB Type-C (IP68)
- EMC and ESD protection
## Connectors and Pins
:::warning
The pin order is different from the Pixhawk standard (compatible to the Betaflight standard).
:::
### UARTs
Current UART configuration:
| UART | Device | Function |
| ------ | ---------- | ---------------------------- |
| USART1 | /dev/ttyS0 | Console/Debug |
| USART2 | /dev/ttyS1 | RC Input |
| USART3 | /dev/ttyS2 | TEL4 (DJI/MSP) |
| UART4 | /dev/ttyS3 | TEL1 |
| UART5 | /dev/ttyS4 | TEL2 |
| UART7 | /dev/ttyS5 | TEL3 (ESC Telemetry) |
| UART8 | /dev/ttyS6 | GPS1 |
### Motor/Servo Outputs
| Connector | Pin | Function |
| ----------| ------------------ |
| ESC | M1 | Motor 1 |
| ESC | M2 | Motor 2 |
| ESC | M3 | Motor 3 |
| ESC | M4 | Motor 4 |
| PWM | M5 | Motor 5 |
| PWM | M6 | Motor 6 |
| PWM | M7 | Motor 7 |
| PWM | M8 | Motor 8 |
| AUX | M9 | LED/PWM/etc. |
<a id="bootloader"></a>
## PX4 Bootloader Update
Before PX4 firmware can be installed, the _PX4 bootloader_ must be flashed.
Download the [gearup_airbrainh743_bootloader.bin](https://github.com/PX4/PX4-Autopilot/blob/main/boards/gearup/airbrainh743/extras/gearup_airbrainh743_bootloader.bin) bootloader binary and read [this page](../advanced_config/bootloader_update_from_betaflight.md) for flashing instructions.
## Building Firmware
To [build PX4](../dev_setup/building_px4.md) for this target:
```
make gearup_airbrainh743_default
```
## Installing PX4 Firmware
Firmware can be installed in any of the normal ways:
- Build and upload the source:
```
make gearup_airbrainh743_default upload
```
- [Load the firmware](../config/firmware.md) using _QGroundControl_.
You can use either pre-built firmware or your own custom firmware.
## Debug Port
### System Console
UART1 (ttyS0) is configured for use as the [System Console](../debug/system_console.md).