ADC not warking Atmega32

[SPOTLIGHT81]

hi all

In this code, the value of the variable "adcval" does not change
But 1023 remains as you can see in the picture
There is definitely something missing in the code
Please Help
Thank you all

Code: Select all

#include "HC595.h"

unsigned adcval = 0;

void main (void)
{
DDRA.B0 = 0;  /// channel 0 from adc port as input


DDRC.B0 = 1;  /// output for display
DDRC.B1 = 1; /// output for display
DDRC.B2 = 1;  /// output for display

PORTC.B0 = 0;  /// output for display
PORTC.B1 = 0;  /// output for display
PORTC.B2 = 0;  /// output for display

adc_init ();
while (1)
      {
      adcval = adc_read (0);

      Display_HC595 (adcval, 0);
      }
}

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[ashleyjames0032]

Hello, just an idea. Have you thought that maybe the input is equal to the supply voltage of the Atmega ADC? It seems to be full scale value.

[filip]

Hi,

Please take a look at the ADC example from the compiler :
\mikroBasic PRO for AVR\Examples\Development systems\EasyAVR7\ADC on LEDs\

Regards,
Filip.

[SPOTLIGHT81]

Hello all
Thank you for the reply
Sorry for the late reply, I've been busy the past few days
In fact, I tried the example in the program, but it did not work either

[josepvh]

Hello.

I have the same problem, I found the same example in the help and in the book, with Mikcro Basic and MikroC, it doesn't work, the alue 1023, it stays stable and doesn't change. Can somebody help me