dejavudwh commented on issue #16265:
URL: https://github.com/apache/nuttx/issues/16265#issuecomment-2832909782

   > [@xiaoxiang781216](https://github.com/xiaoxiang781216) 
[@anchao](https://github.com/anchao) 
[@raiden00pl](https://github.com/raiden00pl) ^
   > 
   > [@dejavudwh](https://github.com/dejavudwh) I think not all 
microcontrollers have hrtimer. I know some families of STM32 has support to it.
   
   You are correct. However, the "hrtimer" I mentioned here is a software 
concept similar to Linux's hrtimer. It does not require hardware-specific 
"hrtimer" support, but simply enables shorter-duration timing. For example, 
with a 24M timer, it can already achieve ~40ns-level timing precision. 
Currently, NuttX's minimum timing precision remains one OS Tick.


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