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When I connected a newbie LPC11u68 to USB port,it recognized in windows as an USB mass storage device.When I programmed LPCOPEN HID example by Flash magic to it,after resetting the board,my PC can't recognized it.Only when I pulled down PIO0_1(ISP selection pin)it still recognized as a Mass storage device.???

EDIT:

with adding a 470r resistor to the USB_DP line ,all problems were vanished and MCU correctly recognized by PC as a HID device.

Dzzz
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1 Answers1

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When I connected a newbie LPC11u68 to USB port,it recognized in windows as an USB mass storage device

The good news: The hardware works. The (mask-) ROM bootloader presents itself as mass storage device.

When I programmed LPCOPEN HID example by Flash magic to it,after resetting the board,my PC can't recognized it

The bad news: This program does not work. There are many possible causes, for example:

  • You compiled for the wrong processor type
  • The program expects different hardware to be present
Turbo J
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  • I used it's owned LPCOPEN HID example,I compiled it successfully with LPCXPRESSO & it's required hardware is designed well based on the LPCXPRESSO board's schematic – Dzzz Apr 17 '16 at 12:22