PIC24 ADC Handling

  // turn of ADC

  AD1CON1bits.ADON = 0;

  // configure pins as analog inputs (all 16 channels)

    AD1PCFGL = 0x00;

  // disable band gab channels in scan

  AD1PCFGH = 0x00;

  // init ADC

  OpenADC10(  ADC_MODULE_ON |                 // Adcon1   /* A/D Converter on */

        ADC_IDLE_CONTINUE |                         /* A/D Operate in Idle mode */

        ADC_FORMAT_INTG |                           /* A/D data format integer */

        ADC_CLK_AUTO |                              /* Internal counter ends sampling and starts conversion (Auto convert) */

        ADC_AUTO_SAMPLING_ON |                     /* Sampling begins immediately after last conversion */

        ADC_SAMP_ON                                 /* sample / hold amplifiers are sampling */

        ,

        ADC_VREF_AVDD_AVSS |           // Adcon2   /* A/D Voltage reference configuration Vref+ is AVdd and Vref- is AVss */

        ADC_SCAN_ON |                               /* A/D Scan Input Selections for CH0 during SAMPLE A */

        ADC_INTR_16_CONV |                          /* Interrupts at the completion of conversion of 16 samples */

        ADC_ALT_BUF_OFF |                           /* Buffer configured as 1 16-word buffer */

        ADC_ALT_INPUT_OFF                           /* use MUXA only */

        ,

        ADC_SAMPLE_TIME_10 |         // Adcon3   /* A/D Auto Sample Time 10 Tad */

                                // 55us with 4MHz FCY and CLK_11Tcy

        ADC_CONV_CLK_SYSTEM |                       /* Clock derived from system clock */

        ADC_CONV_CLK_11Tcy                          /* A/D Conversion Clock is 11*Tcy */

                                // 365kHz - 2.75us, 10 clk for sample and 12 clk for conversion = 22 clk

                                // x 16 channels = 352 clk = 0.968ms, for all 16 channels

        ,

        ENABLE_ALL_ANA_0_15             // PinConfig

        ,

        ENABLE_ALL_INPUT_SCAN       // Scanselect

      );