Hello.
I have problemes with DHT11 code.
I find a cubieboard with A10 processor script here:
https://github.com/klagges/dht-CT
http://www.forum-cubieboard.de/Thread-sensor-dht-11-auslesen
The code is the same using with imx233 here:
https://github.com/borisov-r/olinuxino
To compile the scropt you must download gpio_lib.h
My problem is that i can see date enter but never good data.
Then script never watch me temp and humidity.
I think i have a cheksum problem but can't tell why...
Can someone help me?
Thanx
Hi pawnies20,
I don't have DHT11, but maybe I know where could be the problem with software delays. Full software interfaces has very restricted time slots, and time issues.
Do you set native frequency of A10?
Hi Cosik.
Thank you for your help.
I'm happy that you can help me
No, i don't know hox set native frequency of A10.
Thanx a lot
You should use cpufreq-set command, but in this moment I can't confirm you how exactly you should use it, but you need try to disable cpu frequency scaling.
Ok, perfect, i will try this night!!!
Quote from: Cosik on October 16, 2014, 05:20:19 PM
You should use cpufreq-set command, but in this moment I can't confirm you how exactly you should use it, but you need try to disable cpu frequency scaling.
If you want do disable frequency scaling, you should use a governor with fixed frequency, eg.
performance (max. freq.),
powersave (min. freq.) or
userspace (user set freq.). Look for available ones with
cpufreq-info -g and set them wit
cpufreq-set -g <pgovernor>, eg.
cpufreq-set -g performance.
PS: If you want a correct timing, you should rather schedule your program as realtime.
Hi pawies20,
Did you try it? Could you share yours status of testing it?