hartmannathan commented on pull request #5432:
URL: https://github.com/apache/incubator-nuttx/pull/5432#issuecomment-1031579961


   > The implementation of of high resolution timers will probably need to rely 
on MCU HW timer and will be an optional feature.
   
   In that case, there will _have_ to be additional Kconfigs to select which HW 
timer provides this service. We can't just pick one because this is very arch- 
and chip- dependent, and some timers have special capabilities which the 
application may need. ARM has the SysTick timer which (if I understand 
correctly) doesn't have to be configured for 1 KHz operation, though that seems 
to be what everyone is doing. But other archs don't have such a timer and rely 
on peripheral timers on the SoC. Please don't misunderstand: I think it would 
be great to have a nicely integrated solution. I just think it will be an awful 
lot of work to get there. (Unless we leave it up to the board logic, but that 
is its own can of worms.)


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