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mRo Pixhawk Flight Controller (Pixhawk 1)

:::warning PX4 does not manufacture this (or any) autopilot. Contact the manufacturer for hardware support or compliance issues. :::

The mRo Pixhawk® is a hardware compatible version of the original Pixhawk 1. It runs PX4 on the NuttX OS.

:::tip The controller can be used as a drop-in replacement for the 3DR® Pixhawk 1. The main difference is that it is based on the Pixhawk-project FMUv3 open hardware design, which corrects a bug that limited the original Pixhawk 1 to 1MB of flash. :::

mRo Pixhawk Image

Assembly/setup instructions for use with PX4 are provided here: Pixhawk Wiring Quickstart

:::tip This autopilot is supported by the PX4 maintenance and test teams. :::

主要特性

  • 微处理器：

    • 32-bit STM32F427 Cortex® M4 core with FPU
    • 168 MHz/256 KB RAM/2 MB Flash
    • 32 bit STM32F100 failsafe co-processor
    • 24 MHz/8 KB RAM/64 KB Flash

  • 传感器：

    • ST Micro L3GD20 3-axis 16-bit gyroscope
    • ST Micro LSM303D 3-axis 14-bit accelerometer / magnetometer
    • Invensense® MPU 6000 3-axis accelerometer/gyroscope
    • MEAS MS5611 气压计

  • 接口：

    • 5x UART (serial ports), one high-power capable, 2x with HW flow control
    • 2x CAN
    • Spektrum DSM / DSM2 / DSM-X® Satellite compatible input up to DX8 (DX9 and above not supported)
    • Futaba® S.BUS compatible input and output
    • PPM sum signal
    • RSSI (PWM or voltage) input
    • I2C
    • SPI
    • 3.3 and 6.6V ADC inputs
    • External microUSB port

  • 电源系统

    • Ideal diode controller with automatic failover
    • Servo rail high-power (7 V) and high-current ready
    • All peripheral outputs over-current protected, all inputs ESD protected

  • 重量和尺寸:

    • Weight: 38g (1.31oz)
    • Width: 50mm (1.96")
    • Thickness: 15.5mm (.613")
    • Length: 81.5mm (3.21")

访问链接

编译固件

:::tip Most users will not need to build this firmware! It is pre-built and automatically installed by QGroundControl when appropriate hardware is connected. :::

To build PX4 for this target:

make px4_fmu-v3_default

Debug Ports

Console Port

The PX4 System Console runs on the port labeled SERIAL4/5.

:::tip A convenient way to connect to the console is to use a Zubax BugFace BF1, as it comes with connectors that can be used with several different Pixhawk devices. Simply connect the 6-pos DF13 1:1 cable on the Zubax BugFace BF1 to the Pixhawk SERIAL4/5 port.

Zubax BugFace BF1 :::

The pinout is standard serial pinout, designed to connect to a 3.3V FTDI cable (5V tolerant).

3DR Pixhawk 1 FTDI
1 + 5v (红色) N/C
2 S4 Tx N/C
3 S4 Rx N/C
4 S5 Tx 5 FTDI RX （黄色）
5 S5 Rx 4 FTDI TX （橙色）
6 GND 1 FTDI GND (黑色)

The wiring for an FTDI cable to a 6-pos DF13 1:1 connector is shown in the figure below.

Console Connector

The complete wiring is shown below.

Console Debug

:::info For information on how to use the console see: System Console. :::

SWD Port

The SWD (JTAG) ports are hidden under the cover (which must be removed for hardware debugging). There are separate ports for FMU and IO, as highlighted below.

Pixhawk SWD

The ports are ARM 10-pin JTAG connectors, which you will probably have to solder. The pinout for the ports is shown below (the square markers in the corners above indicates pin 1).

ARM 10-Pin connector pinout

:::info All Pixhawk FMUv2 boards have a similar SWD port. :::

针脚定义

TELEM1，TELEM2 接口

针脚 信号 电压
1（红） VCC +5V
2 TX (OUT) +3.3V
3 RX (IN) +3.3V
4（黑） CTS (IN) +3.3V
6 RTS (OUT) +3.3V
6 GND GND

GPS 接口

针脚 信号 电压
1（红） VCC +5V
2 TX (OUT) +3.3V
3 RX (IN) +3.3V
4（黑） CAN2 TX +3.3V
6 CAN2 RX +3.3V
6 GND GND

SERIAL 4/5 port

Due to space constraints two ports are on one connector.

针脚 信号 电压
1（红） VCC +5V
2 TX (#4) +3.3V
3 RX (#4) +3.3V
4（黑） TX (#5) +3.3V
6 RX (#5) +3.3V
6 GND GND

ADC 6.6V

针脚 信号 电压
1（红） VCC +5V
2 ADC IN up to +6.6V
3 GND GND

ADC 3.3V

针脚 信号 电压
1（红） VCC +5V
2 ADC IN up to +3.3V
3 GND GND
4（黑） ADC IN up to +3.3V
6 GND GND

I2C

针脚 信号 电压
1（红） VCC +5V
2 SCL +3.3 (pullups)
3 SDA +3.3 (pullups)
4（黑） GND GND

CAN

针脚 信号 电压
1（红） VCC +5V
2 CAN_H +12V
3 CAN_L +12V
4（黑） GND GND

SPI

针脚 信号 电压
1（红） VCC +5V
2 SPI_EXT_SCK +3.3
3 SPI_EXT_MISO +3.3
4（黑） SPI_EXT_MOSI +3.3
6 !SPI_EXT_NSS +3.3
6 !GPIO_EXT +3.3
7 GND GND

POWER

针脚 信号 电压
1（红） VCC +5V
2 VCC +5V
3 电流 +3.3V
4（黑） 电压 +3.3V
6 GND GND
6 GND GND

SWITCH

针脚 信号 电压
1（红） VCC +3.3V
2 !IO_LED_SAFETY GND
3 SAFETY GND

串口映射

UART 设备 Port
UART1 /dev/ttyS0 IO debug
USART2 /dev/ttyS1 TELEM1 (流控)
USART3 /dev/ttyS2 TELEM2 (流控)
UART4
UART7 CONSOLE
UART8 SERIAL4

串口映射

UART 设备 Port
UART1 /dev/ttyS0 IO debug
USART2 /dev/ttyS1 TELEM1 (流控)
USART3 /dev/ttyS2 TELEM2 (流控)
UART4
UART7 CONSOLE
UART8 SERIAL4

原理图

The board is based on the Pixhawk-project FMUv3 open hardware design.

:::info As a CC-BY-SA 3.0 licensed Open Hardware design, all schematics and design files are available. :::