why not use perf count from DWT for performance measurement: https://github.com/apache/nuttx/blob/master/arch/arm/src/armv7-m/arm_perf.c
On Mon, Jan 13, 2025 at 11:59 PM Roberto Bucher <bubu.buc...@gmail.com> wrote: > Hi Jiawei Wang > > I have a similar requirement. The solution with SysTick and a little > tick in configuration used through semaphores, doesn't solve the problem > in a good way: shorter sampling times (<500us) are difficult to obtain, > in particular in pysimCoder generated code. This is my experience, but > I'm still waiting for a better solution. > > Bye > > Roberto > > > On 1/13/25 2:57 PM, Jiawei Wang wrote: > > Hello everyone, > > > > I am currently developing on an STM32H7 board using NuttX and am in need > of a high-resolution timer to profile my program. > > > > A timer with microsecond resolution would suffice. > > > > My initial approach was to utilize one of STM32's timers configured in > 1MHz auto-reload counter mode, and then combine the counter register value > with the SysTick value to derive a time measurement. However, this method > feels somewhat hacky and bypasses the OS's abstraction layer, which I > prefer to maintain. > > > > As I am relatively new to NuttX, I am unsure of the conventional method > within NuttX to achieve this functionality and have not found relevant > examples. Any guidance or pointers would be appreciated. > > > > Thank you, > > > > Jiawei Wang <m...@jwang.link> > >
