[fpc-pascal] Reading AM2302 temp/humid sensor on RaspberryPi?

[Mark Morgan Lloyd]

On 24/08/18 09:15, R0b0t1 wrote:
> On Thu, Aug 23, 2018 at 6:28 AM, Mark Morgan Lloyd<markMLl.fpc-pascal at telemetry.co.uk> wrote:> On 23/08/18 10:00, Martin Schreiber wrote:>>>> On Thursday 23 August 2018 11:11:34 Bo Berglund wrote:> On Thu, 23 Aug>> 2018 09:00:07 +0200, Bo Berglund>> <bo.berglund at gmail.com> wrote:> >I will>> need a higher resolution GetTickCount for this...>> Is there in fact a way>> (on Linux - Raspbian) to get a tickcount with> higher resolution than 1 ms?>>> On a mid-00s server I'm using clock_gettime(CLOCK_REALTIME which is> apparently better than 1uSec, but from previously looking at older PCs and> (I think) RPi3 your mileage may vary enormously. AIUI there's been a lot of> issues over the years with different cores not having their counters in> step, with counter frequency following dynamic clocks rather than being> fixed and so on.>
> There is clock_getres(2) to test this.

That shows the nominal resolution, not the actual rate that the counter 
is updated.

-- 
Mark Morgan Lloyd
markMLl .AT. telemetry.co .DOT. uk

[Opinions above are the author's, not those of his employers or colleagues]