Re: Arduino - аналоговый вход
Нашел, 3 дня искал.
OK, I just simulated the example “Analog input”. First I run the code on a naked AVR it said “[AVR AD Converter] Reference value=0;”. So I opened the IO registers and find ADMUX on 0x7c which read “0×40″. That means it uses AVCC as reference. Connect it to power will eliminate the problem. To real AVR, connect AVCC to power and add a decoupling capacitor between AREF and ground.
|
