# PX4 系统控制台
The system console allows low-level access to the system, debug output and analysis of the system boot process. The most convenient way to connect it is by using a Dronecode probe (opens new window), but a plain FTDI cable can be used as well.
提示
The console should be used for debugging if the system won't boot. The MAVLink Shell may otherwise be more suitable, as it is much easier to set up and can be used for many of the same tasks.
# System Console vs. Shells
The console is made available through a (board-specific) UART that can be connected to a computer USB port using a 3.3V FTDI (opens new window) cable. This allows the console to be accessed using a terminal application.
Pixhawk controller manufacturers are expected to expose the console UART and SWD (JTAG) debug interfaces through a dedicated debug port that complies with the Pixhawk Connector Standard. Unfortunately some boards predate this standard or a non-compliant.
注解
Developers targeting a number of different boards may wish to use a debug adapter to simplify connecting multiple boards. For example, the Dronecode probe (opens new window) comes with connectors for the Pixhawk Debug Port and several other boards.
Connect the 6-pos JST SH 1:1 cable to the Dronecode probe or connect the individual pins of the cable to a FTDI cable like this:
# Connecting via Dronecode Probe
The system console can be accessed through the Dronecode probe or an FTDI cable. Both options are explained in the section below.
- 3DR Pixhawk v1 Flight Controller (also applies to mRo Pixhawk, Holybro pix32)
- Pixhawk 1/2
- Pixracer
# Connecting via FTDI 3.3V Cable
Flight controllers that adhere to the Pixhawk Connector standard use the Pixhawk Standard Debug Port (opens new window).
在 Ubuntu 上安装 screen （mac os 已经安装了它）：
| Connecting via FTDI 3.3V Cable | - | FTDI | - |
|---|---|---|---|
| 2 | + 5v (红色) | N/C | |
| 2 | UART7 Tx | 5 | FTDI RX （黄色） |
| 3 | UART7 Rx | 4 | FTDI TX （橙色） |
| 4（黑） | SWDIO | N/C | |
| 6 | SWCLK | N/C | |
| 6 | GND | 1 | FTDI GND (黑色) |
# 打开控制台
After the console connection is wired up, use the default serial port tool of your choice or the defaults described below:
# Linux / Mac OS: Screen
下载 PuTTY (opens new window) 并启动它。
sudo apt-get install screen
- 串口：pixhawk v1/pixracer 使用 57600 波特率
Connect screen at BAUDRATE baud, 8 data bits, 1 stop bit to the right serial port (use ls /dev/tty* and watch what changes when unplugging / replugging the USB device). Common names are /dev/ttyUSB0 and /dev/ttyACM0 for Linux and /dev/tty.usbserial-ABCBD for Mac OS.
screen /dev/ttyXXX BAUDRATE 8N1
# Windows: PuTTY
Download PuTTY (opens new window) and start it.
Then select 'serial connection' and set the port parameters to:
- 57600 波特率
- 8 数据位
- 1 个停止位
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