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why VBUS1-0 in USB_OTG_DEV_CTL can not be 11?

Question asked by xuyejin@sina.com on Feb 3, 2015
Latest reply on Feb 26, 2015 by xuyejin@sina.com

Hi,

 

  I use bf526 to usb-otg host in visualdsp++ 5.0,update 10.0.

  when I run to DriveVbusOn(),then the software loop on

  line

while( (*pUSB_OTG_DEV_CTL&0x0018)!=0x0018) ;

 

  I have measured the voltage on Vbus,It is 5.04V.

  why the  VBUS1-0 in USB_OTG_DEV_CTLcan not be 11?

QQ图片20150204105641.png

 

regards

yejin xu

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