开发板:DevKit8500A(am3715)
OS : wince6.0
组件选择:
驱动添加USB HOST
现象:
U盘接入USBhost端口,可以正确识别,但是其他设备如SD卡读卡器、鼠标、USB转串口(驱动已安装)均无法识别,而且被其他设备插入后,U盘再接入也无法识别。使用开发板提供的镜像亦如此,望知道原因的高手指点一二!
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Wince上的USB HOST是EHCI的,应该只支持USB2.0以上的设备,鼠标,USB转串口应该都是1.1设备,需要用USB 2.0 HUB转接,可以看看:
http://processors.wiki.ti.com/index.php/WinCE-BSP_ARM-A8_User_Guide#USB_Host_Driver