Arduino Pro Micro

Hi,

I don’t understand what happened but after downloading a little program (timer 3 interrupt at 40 Hz + Mag3110 magnetic sensor polling) I suddenly lost my COM when compiling and downloading.

Seems that my computer does not recognize the USB driver (sparkfun.inf) anymore. Communication is not possible anymore. What did I do wrong ?

Can somebody help me ? How can I unblock the situation ?

Thanks.

OK guys, everything is OK now. I followed the troubleshooting guide and have reset the bootloader while uploading a little bug free sketch. :smiley: