MikroElektronika Forum

Internal reference
I want to use the internal reference on the atmega328p, but I can't seem to get it to work. I used:
ADC_Init_Advanced(_ADC_INTERNAL_REF)

If I connect AREF to an external voltage, via a resistor and a 2.2V zener diode, then I can read the voltage on PC0, otherwise I always get the value 1023.

Any hint?

Hi,

Sorry for the delay.

Can you share your project, and can you tell me what development board you are using?

Regards,

Ivan.

Hi
I work on EASY AVR V7.
But i have found the solution:
Every time i wish to read the voltage i do:
ADC_Init_Advanced(_ADC_INTERNAL_REF)
Delay_50us
voltage = ADC_Read(0)
Delay_50us

So i initialize ADC every time.
This works.

Thank you.