Call me crazy but now i got my time of 1ms while trying several things but i am very surprised of this behaviour. With all those tries i came to the same result as at my first post. As i wrote in my there i also tried with a value of 80'000 in the periodl/h registers. But nothing happened. And I was shure to save all before compiling and starting! For me this is relly crazy i don't understand that. In addition, with a lower count of 1000 the time should be at least above 12.5us.
Now i'm just writing to the period registers 80000 as above and it is working?!?
Anyway, thanks a lot for your help.
PS: Your definition of a man-year is reminds me on some of my cheefs ;-)