Beagleboard Black无法从MicroSD启动 [英] Beagleboard Black doesn't boot from MicroSD
问题描述
So I can flash the eMMC from the BBB. However I downloaded from wget https://rcn-ee.com/rootfs/2016-06-09/flasher/BBB-eMMC-flasher-ubuntu-16.04-console-armhf-2016-06-09-2gb.img.xz the Ubuntu image and extracted and placed it on the SD card through Win32DiskImager.
我将SD卡放在sd插槽中，并尝试通过按S2按钮启动，同时将开发板连接到USB，为笔记本电脑供电.我等待LED亮起，但没有任何反应.它可以在没有SD卡的情况下工作，但不能与之配合使用.通过ssh连接时，什么都没闪烁，什么也没有.有任何想法吗?
I put the SD card in the sd slot and tried to boot by pressing the S2 button while I connect the board to the usb for power to my laptop. I wait for LEDs to turn on and nothing happens. It works without the SD card, but not with it. Nothing blinks, nothing when I connect via ssh. Any ideas?
推荐答案
所以我的回答很简单.最好获取UART调试连接器，请参见此处.这样，您便知道在打开BBB电源时，当您进行串行连接(输入)时，U-boot的输出将显示在您的终端上.如果找不到该映像，则U-boot将向终端发送消息，通知您没有内核映像.
So my answer was quite simple. It's best to get the UART Debug connector, see here. That way you know when you power on the BBB, the output of U-boot is displayed on your terminal when you serial connect (putty). If it does not find the image, the U-boot will send messages to the terminal notifying you that there is no kernel image.
获得UART调试连接器并通过串行连接与将其连接到实际的BBB有所不同. BBB的输出(当您使用ssh时)仅在一切加载完毕时通知，并且BBB的登录信息会显示在终端上. 如果您的电路板找不到内核，则不会输出任何内容，并且您也不知道出了什么问题.但是，如果您通过UART调试进行串行连接，则不必担心，因为您可以看到输出和来自U-boot的错误消息告诉您出了什么问题.
Getting the UART Debug connector and connecting through serial is different than ssh'ing to the actual BBB. The output of the BBB (when you ssh) just notifies when everything loads up and the login information to the BBB is displayed on terminal. If your board cannot find the kernel, nothing will output, and you won't know what is wrong. However, if you connect serially through UART debug you wont have to worry, since you get to see output and error messages from U-boot telling you what's wrong.
* 注意 *:如果您拧紧U靴，就永远不要这样做(除非它确实需要更新)，这是我只能看到没有输出的唯一方法当您打开BBB并连接UART调试时，请从终端上进行操作.如果您没有拧紧U靴，那么很有可能是故障的BBB，您应该将其退回.
*NOTE*: If you screw around the U-boot, which you should NEVER do (unless it really needs an update), that is the only way I can see there being no output whatsoever from the terminal when you turn on BBB and have the UART debug connected. If you didn't screw up the U-boot, then more than likely its a faulty BBB and you should return it.
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