Most PIC32's use AD1PCFG to define pins as analog or digital, but not all.  If your device doesn't have that register: Look in the datasheet for ANSELx registers (ANSELA, ANSELB, etc) Check your OpenADC10() call if you use it isnt' based on ENABLE_AN0_ANA etc for the final AD1CSSL register parameter as these will be wrong for ANSELA etc based devices  

Setting up the AtoD Sampling Look up the following in the device datasheet: Tad = ADC Clock period ADC Clock Period Sample Time Conversion Time (value not needed to setup but this tells you how long it will take to convert) ADCS – ADC Conversion Clock Select bits ADC_CONV_CLK_#Tcy  This value sets Tad: Tpb (Peripheral bus speed) […]

Automatically Read A Single Analog Input CloseADC10();// ensure the ADC is off before setting the configuration OpenADC10( (ADC_MODULE_ON | ADC_IDLE_STOP | ADC_FORMAT_INTG16 | ADC_CLK_AUTO | ADC_AUTO_SAMPLING_ON | ADC_SAMP_ON), //AD1CON1 register (ADC_VREF_AVDD_AVSS | ADC_SCAN_OFF | ADC_ALT_INPUT_OFF | ADC_SAMPLES_PER_INT_10), //AD1CON2 register (ADC_SAMPLE_TIME_4 | ADC_CONV_CLK_PB | ADC_CONV_CLK_3Tcy), //AD1CON3 register (SET THE SAMPLE TIME ETC) (ENABLE_AN0_ANA), //AD1PCFG register (SET […]