Coral Dev Board无法被电脑/Raspberry Pi识别的问题求助

Hey there, let's walk through this issue step by step—you've already checked some critical boxes, so let's dig into the remaining likely culprits:

• First, rule out physical connection issues (this is the most common fix!)
  Your lsusb output doesn't show any device matching the Coral Dev Board's CP210x USB-to-UART chip (usually ID 10c4:ea60), which means your system isn't even detecting the board at the USB level.

  • Double-check you've put the board into flash mode correctly: Hold the RESET button, press and hold BOOT, release RESET, then release BOOT. Wait 5-10 seconds before running lsusb again.
  • Avoid underpowered USB ports/hubs: Raspberry Pi 3B+'s USB ports can struggle with power draw during flashing. Use a powered USB hub or (if using Ubuntu) plug directly into a USB 3.0 port on your desktop/laptop. For the Pi, make sure you're using an official 5V/2.5A power supply to avoid voltage drops.
  • Swap your USB cable: Many "charging-only" cables lack data lines. Grab a short, high-quality USB 2.0 data cable and try again.

• Verify the CP210x driver is actually active
  You mentioned the driver is running, but let's confirm with concrete commands:

  • Run lsmod | grep cp210x—you should see output like cp210x 20480 0 if the module is loaded.
  • If no output, manually load it with sudo modprobe cp210x, then recheck lsusb and dmesg.

• Refresh udev rules to ensure they're applied
  Even if your /etc/udev/rules.d/65-edgetpu-board.rules is correct, sometimes rules don't take effect until reloaded:

  sudo udevadm control --reload-rules && sudo udevadm trigger
  

  Unplug the Dev Board, plug it back in, then run dmesg | grep ttyUSB again.

• Test your host's USB ports with another device
  To rule out a faulty USB port on your Ubuntu or Pi system, connect a known-working USB serial device (like an Arduino) and check if it shows up in dmesg | grep ttyUSB. If it doesn't, you may have a system-level USB issue to troubleshoot first.

• For Raspberry Pi 3B+ specifically
  The Pi's USB bus has occasional compatibility quirks. Try:

  • Plugging the Dev Board directly into a Pi USB port (no hub in between)
  • Switching to a different USB port on the Pi
  • Updating your Pi's OS with sudo apt update && sudo apt upgrade to ensure you have the latest kernel and USB fixes

内容的提问来源于stack exchange，提问作者Thomas Allain