• State Not Answered
  • Locked Locked
  • Replies 2 replies
  • Subscribers 22 subscribers
  • Views 904 views
  • Users 0 members are here
Options
Related
How was your experience today?
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

USB Device auto-connect understanding and RTX

Ian Hickey

Hi All,

I am trying out some demo code from the Keil RTX USB Device Memory example
C:\Keil\ARM\Boards\Keil\MCB1700\RL\USB\Device\RTX\Memory\

My problem is that I cannot get the USB device recognised as there is no USB connect done automatically.

I suspect that there is a mechanism needed for the VBUS pin to create an interrupt which will then cause a task to run for the Power Event to the RTX.

I have configured the pin for VBUS functionality.

Can anyone point me in the correct direction for documentation.

Thanks

Parents
  • 0 in reply to Ron Wedge

    Hi,

    Thanks for that answer.

    I reviewed carefully and determined that a NPN transistor (instead of a PNP) had been fitted to the board (connecting D+ to 3V3 via 1.5kOhms for the softconnect function).

    Correcting this fixed the problem.

    Note that this is a custom board (not Keil MCB1700).

    Ian

Reply
  • 0 in reply to Ron Wedge

    Hi,

    Thanks for that answer.

    I reviewed carefully and determined that a NPN transistor (instead of a PNP) had been fitted to the board (connecting D+ to 3V3 via 1.5kOhms for the softconnect function).

    Correcting this fixed the problem.

    Note that this is a custom board (not Keil MCB1700).

    Ian

Children
No data