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need to have time separate from main loop_stm32f407

Question asked by armoun.mohamad on Sep 19, 2014
Latest reply on Sep 19, 2014 by Andrew Neil
hi every body 
in my program i need to do somethings in specific time , this "time" is not equal all the time.
for example for doing first job i need to do it 5 sec after a flag become set. and after that i need to make it zero and after that doing second  job when this timer is more than 3sec

this timer has not stop ever . it has to count separately from the any other part of cpu.
and it should be as much accurate as counting milisecond.
note in this case i cant use Systick because i using it for something else.

thanks in advance 

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