On Tue, 1 Feb 2022 at 19:28, Richard Petri <g...@rpls.de> wrote: > > Starting the SysTick timer and changing the clock source a the same time > will result in an error, if the previous clock period was zero. For exmaple, > on the mps2-tz platforms, no refclk is present. Right after reset, the > configured ptimer period is zero, and trying to enabling it will turn it off > right away. E.g., code running on the platform setting > > SysTick->CTRL = SysTick_CTRL_CLKSOURCE_Msk | SysTick_CTRL_ENABLE_Msk; > > should change the clock source and enable the timer on real hardware, but > resulted in an error in qemu. > > Signed-off-by: Richard Petri <g...@rpls.de>
Reviewed-by: Peter Maydell <peter.mayd...@linaro.org> Thanks, you've saved me a debugging session! I had a bug report about a problem with the systick timer a couple of days back, but I hadn't yet got round to investigating it, and now I don't have to, because this patch fixes the reported failure :-) -- PMM
