SmartRF 05 Evaluation Board

Hello!

1. A few days ago to buy two sets of Smart RF05 Evaluation Board, I might be graffed in CC2543EM R1.1 and CC debugger, and CC2544 USB Dongle, I use a Flash Programmer. Download the per_test_cc2543em hex, then no content display, LCD, please before you download any content on the development Board, now want to recover before the content of the LCD display.

2. How to restore the factory program, when can provide the factory program with the refresh method?

3. The development kit yo CC2544 what is the function of USB Dongle, a carrier sense?