• State Not Answered
  • Locked Locked
  • Replies 1 reply
  • Subscribers 21 subscribers
  • Views 2354 views
  • Users 0 members are here
2025 survey

We are running a survey to help us improve the experience for all of our members. If you see the survey appear, please take the time to tell us about your experience if you can.

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 CDC driver

Mike Sarafidis

Hi,

we are using µVision 4.71.2 and NXP LPC11U35. We have tested most of the hardware peripherals with "LPC11Uxx Keil examples New release V1.05-LPCware". The examples work fine for uart, spi, clock, timers, watchdog etc. We cannot test USB with those examples. We have tried USBHID and USBCDC examples but with no success. The device is not recognized at windows XP and windows 8. It seems that either the driver is not working or the source example. We believe that the hardware is correct and according to proposed schematic. The driver's folder contains only an inf file an no usbser.sys file. We have searched windows folder and no usbser.sys exists.

could anyone give as a hint?

thanks in advance.

  • 0

    ok we have solved the problem (error 0x2b) with the driver by selecting manually keil driver as the default for usb to serial com port. now we are getting the following error:

    This device cannot start. (Code 10)
    A request for the USB device descriptor failed.

    we have a breakpoint at USB_IRQHandler but never stops. the code is looping at

    while (!USB_Configuration);

    it seems that there is no communication.

    any ideas?

    thanks