[En-Nut-Discussion]Problem with ADC

[Tommaso Fabbri]

This is my code:
        ADCInit();
        ADCSetChannel(0);
        ADCStartConversion();
        ADCSetMode (0);
        ADCSetPrescale(ADC_PRESCALE_DIV64);
        printf("Siamo QUA!!\n");

             for(;;)
             {

              ADCRead(&adc_value);

              //printf("%u", adc_value);
              //NutSleep(100);
              vadc=adc_value*5/1024;
              printf("%f\n", vadc);
              //n=NutUdpSendTo(sock,inet_addr("255.255.255.255"), port,
str, sizeof(str));

             }
the resullt is f if don't connect anything to the channel.
someone can give me an example of a read from the ad converter. i am doing a
spectre analyzer  and i need to translate analog signals. someone can help
me?