Thank you very much for your response What I'm trying to do is to generate hold and disable times for SPI CS, which should be about 50 ns
I started by an empty for loop but it seems optimization gets rid of it (I haven't researched the issue properly). Then I thought a proper function would be better but got stuck in that expression "sleep resolution" For that scale (10 SYSCLK cycles), a loop is probably OK but I wanted to make sure there's not a more appropriate system tool El mié, 24 mar 2021 a las 10:46, Sara da Cunha Monteiro de Souza (< saramonteirosouz...@gmail.com>) escribió: > Hi Grr, > > I have never needed to use this function neither this range (ns). > But I used the usleep function which resolution is defined as > CONFIG_USEC_PER_TICK. > But maybe, in your case, for such range, you should consider using a > hardware timer or a Timer Hook. > Take a look at this wiki: > https://cwiki.apache.org/confluence/display/NUTTX/Short+Time+Delays > > Sara > > Em qua., 24 de mar. de 2021 às 13:37, Grr <gebbe...@gmail.com> escreveu: > > > Hello to all. > > > > Looking for the right way to create a _very_ short delay (10-100 ns), I > > found clock_nanosleep, whose description says: > > > > "The suspension time caused by this function may be longer than requested > > because the argument value is rounded up to an integer multiple of the > > sleep resolution" > > > > What is the sleep resolution and where/how is defined? > > > > TIA > > Grr > > >
