lpcware

HID USB Problem

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by nasib on Wed Dec 19 12:28:08 MST 2012
Hi all!
I am testing the keyboard code in my lpcxpresso11u14, and i have some questions.

1) when i connect the board in the PC  through the J8 connector, the computer doesn't recognize the board. But when i connect it through the programming connector (J3) there isn't any problem.

2) When i run the keyboard code in the board, and i connect it to the PC (through the J3) it recognize the lpcxpresso like a HID Device (all OK). But when i disconnect it and connect it again, the computer recognize it like a DFU Device, and i can't communicate with it like a HID Device.

Why it could be happened ?

Thank you so much ( and sorry for my English).

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