Need help with Altera Avalon Iterval Timer

HI

I made a Project in qu@rtus II 5.0sp1 Web edition, and in SOPC Builder, I added NIOS II cpu, AvalonTri-State Bridge to an external SRAM, Jtag UART and a Interval Timer. The system generation and hardware configuration went fine. When did a simple application for the design in Nios II IDE Evaluation Edition 5.0, it alsow worked fine, although the aplication didn´t use the Interval Timer. So I want to try the Timer.
I want to use the Intervall timer to mesure the time for som executions for example
Sum = 5;

So I want to initalize the timer, start it, then after the execution stop it and then read the value.
For example like this :

int main(Void)
{
int Sum = 0;
int Time = 0;

........ // Here I want to initalize the timer
........ // Start the timer

Sum = 5;

........ // Stop the timer
Time = ........ // Read the value of the timer

return 0;
}


Can someone give me an example C code.

/MrZ