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前两天买了块BeagleBone Black全球版,回来一测发现:
1.只要插上SD卡,系统无法启动;不插SD卡,系统能正常启动。
2.插上有ubuntu的SD卡,按住系统启动选择按钮,系统无法启动,四个led灯均不亮;
带电拔下SD卡,按复位,系统无法从flash启动;断电后从新上电,可以从flash启动。
查看了一下BBB_SRM.pdf文档,有这么几句:
A switch is provided to allow switching between the modes.
Holding the boot switch down during boot without a SD card inserted will
force the boot source to be the USB port and if nothing is detected on the USB
client port, it will go to the serial port for download.
Without holding the switch, the board will boot from eMMC. If it is empty,
then it will try booting from the uSD slot, followed by the serial port, and then
the USB port.
If you hold the boot switch down during boot, and you have a uSD card
inserted with a bootable image, the board will boot form the uSD card.
红色部分说的清清楚楚,不按下按键,系统从eMMC启动,如果eMMC是空的才选择从SD卡启动!
难道是我买到了次品吗?有遇到这种情况的吗? |
阿莫论坛20周年了!感谢大家的支持与爱护!!
曾经有一段真挚的爱情摆在我的面前,我没有珍惜,现在想起来,还好我没有珍惜……
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