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AM335x USB0速率如何设置?急!谢谢!

大家好:

我想使用AM335x 做一个全速USB设备。看数据手册,AM335x支持全速和高速USB,但是在StartWare里面的程序都是高速的USB代码,请问,我应该怎么将USB设置成全速模式?

alvin lu:

18Mbyte/s左右。

alvin lu:

回复 alvin lu:

USB MSC (MUSB) Host mode EXT2 File System Performance

USB-MSC MUSB Host-DMA-Write Performance values Buffer Size (in Bytes)Transfer Rate (in MBytes/sec)CPU Load (in %)

10240024.4126.30

104857624.2023.48

524288024.1021.94

USB-MSC MUSB Host-DMA-Read Performance values Buffer Size (in Bytes)Transfer Rate (in MBytes/sec)CPU Load (in %)

10240023.6327.13

104857623.5427.27

524288023.5727.50

USB MSC (MUSB) Host mode VFAT File System Performance

USB-MSC MUSB Host-DMA-Write Performance values Buffer Size (in Bytes)Transfer Rate (in MBytes/sec)CPU Load (in %)

10240022.6136.55

26214422.5635.31

USB-MSC MUSB Host-DMA-Read Performance values Buffer Size (in Bytes)Transfer Rate (in MBytes/sec)CPU Load (in %)

10240022.2624.39

26214422.0226.95

Yaoming Qin:

如果用的是starterware,下载最新的版本,有个宏设置可以做到

Jason jing:

回复 Yaoming Qin:

你好,AM335X_StarterWare_02_00_01_01这个版本的device bulk传输怎么把高速USB改为全速呢???

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