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107 lines
3.7 KiB
Markdown
107 lines
3.7 KiB
Markdown
# Holybro pix32 Flight Controller (Discontinued)
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<Badge type="info" text="Discontinued" />
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:::warning
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PX4 does not manufacture this (or any) autopilot.
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Contact the [manufacturer](https://holybro.com/) for hardware support or compliance issues.
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:::
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The Holybro<sup>®</sup> [pix32 autopilot](https://holybro.com/products/pix32pixhawk-flight-controller) (also known as "Pixhawk 2", and formerly as HKPilot32) is based on the [Pixhawk<sup>®</sup>-project](https://pixhawk.org/) **FMUv2** open hardware design.
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This board is based on hardware version Pixhawk 2.4.6.
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It runs the PX4 flight stack on the [NuttX](https://nuttx.apache.org/) OS.
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As a CC-BY-SA 3.0 licensed Open Hardware design, schematics and design files should be [available here](https://github.com/pixhawk/Hardware).
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:::tip
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The Holybro pix32 is software compatible with the [3DR Pixhawk 1](../flight_controller/pixhawk.md).
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It is not connector compatible, but is otherwise physically very similar to the 3DR Pixhawk or mRo Pixhawk.
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:::
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::: info
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This flight controller is [manufacturer supported](../flight_controller/autopilot_manufacturer_supported.md).
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:::
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## Key Features
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- Main System-on-Chip: [STM32F427](https://www.st.com/en/microcontrollers-microprocessors/stm32f427-437.html)
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- CPU: 32-bit STM32F427 Cortex<sup>®</sup> M4 core with FPU
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- RAM: 168 MHz/256 KB
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- Flash: 2 MB
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- Failsafe System-on-Chip: STM32F103
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- Sensors:
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- ST Micro L3GD20 3-axis 16-bit gyroscope
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- ST Micro LSM303D 3-axis 14-bit accelerometer / magnetometer
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- Invensense<sup>®</sup> MPU 6000 3-axis accelerometer/gyroscope
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- MEAS MS5611 barometer
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- Dimensions/Weight
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- Size: 81x44x15mm
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- Weight: 33.1g
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- GPS: u-blox<sup>®</sup> super precision Neo-7M with compass
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- Input Voltage: 2~10s (7.4~37V)
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### Connectivity
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- 1x I2C
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- 2x CAN
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- 3.3 and 6.6V ADC inputs
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- 5x UART (serial ports), one high-power capable, 2x with HW flow control
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- Spektrum DSM / DSM2 / DSM-X® Satellite compatible input up to DX8 (DX9 and above not supported)
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- Futaba<sup>®</sup> S.BUS compatible input and output
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- PPM sum signal
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- RSSI (PWM or voltage) input
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- SPI
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- External microUSB port
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- Molex PicoBlade connectors
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## Where to Buy
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[shop.holybro.com](https://holybro.com/products/pix32pixhawk-flight-controller)
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### Accessories
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- [Digital airspeed sensor](https://holybro.com/products/digital-air-speed-sensor-ms4525do)
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- [HolyBro SiK Telemetry Radio (EU 433 MHz, US 915 MHz)](../telemetry/holybro_sik_radio.md)
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## Building Firmware
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:::tip
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Most users will not need to build this firmware!
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It is pre-built and automatically installed by _QGroundControl_ when appropriate hardware is connected.
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:::
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To [build PX4](../dev_setup/building_px4.md) for this target:
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```
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make px4_fmu-v2_default
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```
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## Debug Port
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See [3DR Pixhawk 1 > Debug Ports](../flight_controller/pixhawk.md#debug-ports).
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## Pinouts and Schematics
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The board is based on the [Pixhawk project](https://pixhawk.org/) **FMUv2** open hardware design.
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- [FMUv2 + IOv2 schematic](https://raw.githubusercontent.com/PX4/Hardware/master/FMUv2/PX4FMUv2.4.5.pdf) -- Schematic and layout
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::: info
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As a CC-BY-SA 3.0 licensed Open Hardware design, all schematics and design files are [available](https://github.com/pixhawk/Hardware).
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:::
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## Serial Port Mapping
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| UART | Device | Port |
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| ------ | ---------- | --------------------- |
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| UART1 | /dev/ttyS0 | IO debug |
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| USART2 | /dev/ttyS1 | TELEM1 (flow control) |
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| USART3 | /dev/ttyS2 | TELEM2 (flow control) |
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| UART4 | |
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| UART7 | CONSOLE |
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| UART8 | SERIAL4 |
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<!-- Note: Got ports using https://github.com/PX4/PX4-user_guide/pull/672#issuecomment-598198434 -->
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