• Registered: 2011-05-06
  • Posts: 2

Topic: USB - two work, one does not

I just got my chumby hacker board running and was wondering about the USB ports. When plugging in my USB jump drive, I can read it on two of the USB ports but on the third (the one between the power and FTDI cable jack). The jump drive flashes at about 4 time a second.

Any ideas?

  • Vambo
  • New member
  • Offline
  • Registered: 2011-05-06
  • Posts: 1

Re: USB - two work, one does not

Don't know what a jump drive is, but does 

lsusb

show all 3 ports?

  • Registered: 2010-09-19
  • Posts: 47

Re: USB - two work, one does not

That particular USB port is different than the other two,  because the 5Volt power going out of that port can be turned on/off with software.  This command will turn the 5 Volt power off to that port:
regutil -w HW_PINCTRL_DOUT0_CLR=0x04000000
And this command will turn the 5 Volt power on to that port:
regutil -w HW_PINCTRL_DOUT0_SET=0x04000000

You might try these commands to see if you see any difference in the behavior of that USB port.

Good Luck,  Barry

  • Registered: 2011-05-06
  • Posts: 2

Re: USB - two work, one does not

The jump drive is just what I call a USB datastick.

The regutil command seems to have worked.

Thank you to both of you for your kind assistance to a new CHB user.