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I'm trying to flash the coral dev board following the steps at https://coral.withgoogle.com/docs/dev-board/get-started/#flash-the-board.

I have the serial connection working and can run fastboot 0 in u-boot on the board. However, when I run fastboot devices on my machine, nothing appears.

I'm on MacOS 10.14.6 with fastboot version 29.0.2-5738569 and have installed the CP210x USB drivers for MacOS.

Brian Yu
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  • Did you try with a different USB-C cable ? Can you also add the dmesg output from your host machine to the question ? – Manoj Sep 05 '19 at 07:14

4 Answers4

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I had the same issue. I tried two USB-C to USB-C cables on my Mac and it was still not recognizing the Coral board.

I was able to get my mac to recognize it by replacing the USB-C to USB-C OTG cable with a USB-C to USB-A cable via a USB-C to USB-A (female) adapter. I'd like to know why a straight usb-c to usb-c cable did not work, but at least I know it was a cable issue for now.

William Sim
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  • Bizarrely, this is exactly what happened with me! – Bryan A Feb 19 '20 at 18:00
  • Exactly the same here. I tried 2 x USB-C cables (Apple and aftermarket) and neither worked when direct connected. I tried all 4 USB-C ports as well... – Selly Aug 14 '20 at 17:42
  • Same for me as well. I tried multiple USB C cables on all ports and none worked. Luckily I found a USB A male to USB C cable lying around, which worked at first try. – David Wright Sep 09 '20 at 09:41
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I had the similar problem. Here are my suggestions:

  1. Serial connect coral dev board, unplug dev board power cable, open a terminal on your Mac and run:

screen /dev/cu.SLAB_USBtoUART 115200

If the terminal is blank, it means it's working. Wait a couple seconds, go to 2. If the it shows "No such file" on the bottom, then reinstall the CP210xUSB to UART Bridge Virtual COM Port(VCP) driver for Mac (https://www.silabs.com/products/development-tools/software/usb-to-uart-bridge-vcp-drivers) even you have installed it before.

  1. Plug your usb-c power cable to your dev board, run:

fastboot 0

If it shows "Configured USB Switch for UFP" and the cursor moves to the next line, then unplug your serial connection(USB-micro-B cable), plug USB-C cable to Data port(OTG). Make sure the power cable of your dev board is connected to a 2-3A outlet instead your laptop.

  1. Run the code on your terminal:

fastboot devices

You should be able to see something like this:

1b0741d6f0609912 fastboot

If not, check your data port usb-c cable connection. And make sure the power cable of the dev board is connected to a 2 - 3A outlet, not your labtop.

Hope this would help!

Novus
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It might be that your fastboot is not the latest version. Try updating it from here. Then repeat the steps for fastboot. Maybe your serial console cable was disconnected. Hope this helps.

N.E.
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The problem occurs because after you run fastboot 0, but before you run fastboot devices you are opening a new terminal window not with screen.

Bhargav Rao
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Henrik
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  • Yep, opening a new terminal window. When I plug the USB-C data cable into my Mac machine, `ioreg` doesn't register any new USB devices as being plugged in. Maybe my machine is just not recognizing the USB connection? – Brian Yu Sep 03 '19 at 18:50
  • That could be it; if you have access to another machine give that a try – Henrik Sep 03 '19 at 19:49
  • also, make sure you have the latest version of fastboot if your mac registered it and it's still not showing up – Nam Vu Oct 16 '19 at 14:53