[Paparazzi-devel] a way to measure time?

[Chris]

Hi.
I have a question for Antoine or Pascal (and of course anyone who might 
know this)
Is the below method for timing between two events valid?

 SysTimeChronoStop();
 time_from_last_measurement = 1e6/(sys_time_chrono /SYS_TICS_OF_USEC(1));
 maxsonar_fclimb = ( ((float)adc_generic_val1 / 100.) - 
((float)adc_generic_last_val / 100.) )* time_from_last_measurement;
 SysTimeChronoStart();

I want to measure the climb rate so i need to be able to measure time
accurately enough.
Chris