topic P2020 Processor usb not detcted in P-Series

P2020 Processor usb not detcted

nareshpuli — Wed, 23 Aug 2017 09:32:17 GMT

Hello,

i am using P2020RDB customized board initially it is worked fine,due to voltage drop we populated ext. 1V to the processor few days latter suddenly USB port is not working that when i connect.

we have USB3300 ic beween the processor and usb port

please what could the the problem for the boot halting, if any one help would be appreciated

Best Regards

Naresh

have a good day !!!!!!!!!

Re: P2020 Processor boot halted at before mounting root login#

nareshpuli — Mon, 28 Aug 2017 10:46:05 GMT

hello,

finally i found that issue due to the USB 3300 chip clock issue,it is not fully booted Between the processor and usb port we have one ic(USB3300)

but now it is booting fine.

Re: P2020 Processor boot halted at before mounting root login#

nareshpuli — Mon, 28 Aug 2017 11:01:20 GMT

Booting fine, but USB port is not detecting any device what could be the problem ??

Re: P2020 Processor usb not detcted

yipingwang — Sun, 17 Sep 2017 11:59:27 GMT

Hello sivakumar puli,

Please go to u-boot prompt, configure the following:

hwconfig=usb1:dr_mode=host,phy_type=ulpi;usb2

Please connect the USB mass storage device and execute the following commands to check whether USB device information can be detected successfully.

=>usb start

=>usb reset

=>usb tree

=>usb info

=>usb storage

=>usb dev

Have a great day,
TIC

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