Hi,
Finally it doesn't work. I think this will not work, because when i test it, I always have a random characters and not a counter of number (0, 1, 2 , ..., 9). Maybe the ATMEGA328P in the Arduino Uno is not working with this flash. I will try to do an other sketch with the Arduino Leonardo. I see into the arduino software a model of "keyboardandmouse" sketch so i will start with this. I'll post it when i'am finish.
Hope this will work 
Thank you buddies