Timer Interrupts on Due

hi
i want to design a timer with arduino mega 2560
this time must have a restore point and Measure every 10 millisecond and display this time on the lcd
i have a lot of problem
the first problem is for reset point
i cant active the reset point and show this on the lcd
please help me
this is my email
fziaee93@yahoo.com
please send your proposed about my project to my email
thanks alot