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???