RT288x_SDK 编译后USB插拔没反应
选择芯片为rt3050，加载dwc_otg.ko时串口输出打印信息为
dwc_otg: version 2.72a 24-JUN-2008
DWC_otg: Core Release: 2.66a
DWC_otg: Periodic Transfer Interrupt Enhancement - disabled
DWC_otg: Multiprocessor Interrupt Enhancement - disabled
DWC_otg: Using DMA mode
DWC_otg: Device using Buffer DMA mode
dwc_otg lm0: DWC OTG Controller
dwc_otg lm0: new USB bus registered, assigned bus number 1
dwc_otg lm0: irq 18, io mem 0x00000000
DWC_otg: Init: Port Power? op_state=1
DWC_otg: Init: Power Port (0)
usb usb1: Product: DWC OTG Controller
usb usb1: Manufacturer: Linux 2.6.21 dwc_otg_hcd
usb usb1: SerialNumber: lm0
usb usb1: configuration #1 chosen from 1 choice
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 1 port detected
cat /proc/bus/usb/devices 输出信息如下
T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=480 MxCh= 1
B: Alloc= 0/800 us ( 0%), #Int= 0, #Iso= 0
D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=0000 ProdID=0000 Rev= 2.06
S: Manufacturer=Linux 2.6.21 dwc_otg_hcd
S: Product=DWC OTG Controller
S: SerialNumber=lm0
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 4 Ivl=256ms
反复插拔USB设备 cat /proc/bus/usb/devices 输出信息没有变化
[解决办法]
可能系统无法识别你的USB设备，我记得这种情况的话，要预先把你设备的VENDER，ProdID之类加入USB的设备列表结构中。
改代码试试
