Maxim-integrated DS4830A Optical Microcontroller Manuel d'utilisateur télécharger pdf (Page 64)

DS4830A User’s Guide

ADST_bit.ADCFG = 0; //set ADDATA to data buffer

ADADDR_bit.ADSTART = 0; //start sequence with ADCFG [0]

ADADDR_bit.ADEND = 15; //end sequence with ADCFG [15]

ADST_bit.ADCONV = 1; //start the conversions

while (1)

{

while (!ADST_bit.ADDAI); //wait for conversions to complete

ADST_bit.ADDAI = 0;

ADST_bit.ADIDX = 0; //set ADDATA to data buffer [0]

for (iCount = 0; iCount < 16; iCount++)

ch0 [iCount]= ADDATA; //read and store ch0 voltage to variable

}

7.3.3 – Continuous Conversion of 16 Samples of Ch0 Using ADC Averaging

PINSEL = 0x0003; //Configure Pins as ADC Ch0 (Diff)

REFAVG_bit.INTREF = 1; //Enable ADC internal reference

for(iCounter = 0; iCounter < 1000; iCounter++); //Wait ~1ms to settle ADC internal reference

ADCN_bit.ADCONT = 1; //run a continuous conversion sequence

ADST_bit.ADCFG = 1; //set ADDATA as configuration (ADCFG)

ADST_bit.ADIDX = 0; //ADIDX = 0, set to ADCFG [0]

ADDATA = 0x0020; //ADCFG [0]: Differential voltage, CH0, 1.2 V FS, Right Aligned

ADST_bit.ADCFG = 0; //set ADDATA to data buffer

ADST_bit.ADCAVG = 1; //set ADDATA to data buffer

ADDATA = 0x0003; // Average of 16 samples of Ch0

ADST_bit.ADCAVG

= 0;

ADADDR_bit.ADSTART = 0; //start sequence with ADCFG[0]

ADADDR_bit.ADEND = 0; //end sequence with ADCFG[0]

ADST_bit.ADCONV = 1; //start the conversions

while (1)

{

while (!ADST1_bit.ADDAI); //wait for conversions to complete

ADST_bit.ADIDX = 0; //set ADDATA to data buffer [0]

ch0 = ADDATA; //read and store ch0 voltage to variable

ADST1_bit.ADDAI = 0; //clear ADDAI flag

}

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Maxim-integrated DS4830A Optical Microcontroller Manuel d'utilisateur Page 64