Beaglebone Black 版本问题

Beaglebone Black到现在总共有10个硬件版本，分别为：A4    A4A    A4B    A5A    A5B    A5C    A6    A6A    B    C，一般找得到的 A5A 及其以上版本的PCB版本对应为：B3    B4    B4    B5    B6    B6    B6。如果BBB买的是二手的或者忘记硬件版本的话，可以通过查看DC口下面写的PCB版本来与硬件版本大致对应一下。

但是BBB硬件版本更替的时候其实修改并不大，几乎对软件没有什么影响。一下摘自BBB的wiki（http://elinux.org/Beagleboard:BeagleBoneBlack）：

Revision C (Production Version)
This revision increases the eMMC from 2GB to 4GB.

Revision B
This version moves to the AM3358BZCZ100 processor as we are no longer able to get the limited production version of the AM3359AZCZ100. 
No changes in features or operation of the board resulted from this change.

Revision A6A
No changes in features or operation of the board.

Revision A6
No changes in features or operation of the board.

Revision A5C
Production had some fallout of boards when running the HDMI tests in the previous production run. Resistor values were tweaked to improve the test results.
No changes in features or operation of the board.

Revision A5B
1) Updated the PCB to incorporate the modification that was being done on Rev A5A. There is NO DIFFERENCE AT ALL in functionality between REV A5A and REV A5B.
2) Made the LEDs dimmer for those that could not sleep due to the brightness of the LEDs.

希望能对初学者有所帮助。