User guide

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DS4830A User’s Guide

7.3 – ADC Code Examples

7.3.1 – One Sequence of 4 Voltage Conversions for Ch0 (Diff), Ch1 (Diff), Ch14 (Single), and Ch15 (Single)

PINSEL = 0xC00F; //Configure Pin as ADC Ch0 (Diff), Ch1 (Diff), Ch14 (Single) and Ch15(Single)

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

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

ADCN_bit.ADCONT = 0; //run a single conversion sequence

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

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

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

ADDATA = 0x2021; //ADCFG [1]: Differential voltage, CH1, 0.6V FS, Right Aligned

ADDATA = 0x400E; //ADCFG [2]: Single voltage, CH14, 2.4V FS, Right Aligned

ADDATA = 0x600F; //ADCFG [3]: Single voltage, CH15, 6.55V FS, Right Aligned

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

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

ADADDR_bit.ADEND = 3; //end sequence with ADCFG [3]

ADST_bit.ADCONV = 1; //start the conversions

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

ADST_bit.ADDAI = 0; //Clear ADDAI flag

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

ch0_volt = ADDATA; //read and store ch0 voltage to variable

ch1_volt = ADDATA; //read and store ch1 voltage to variable

ADST_bit.ADIDX = 14; //set ADDATA to data buffer [14] (according to channel number)

ch14_volt = ADDATA; //read and store ch14 voltage to variable

ch15_volt = ADDATA; //read and store ch15 voltage to variable

7.3.2 – Continuous Conversion of 16 Samples of Ch0 with Location Override

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

ADCN_bit.LOC_OVR = 1; //location override enable

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 and Location override 0

ADDATA = 0x0120; //ADCFG [1]: Differential voltage, CH0, 1.2 V FS, Right Aligned and Location override 1

ADDATA = 0x0220; //ADCFG [2]: Differential voltage, CH0, 1.2 V FS, Right Aligned and Location override 2

ADDATA = 0x0320; //ADCFG [3]: Differential voltage, CH0, 1.2 V FS, Right Aligned and Location override 3

ADDATA = 0x0420; //ADCFG [4]: Differential voltage, CH0, 1.2 V FS, Right Aligned and Location override 4

ADDATA = 0x0520; //ADCFG [5]: Differential voltage, CH0, 1.2 V FS, Right Aligned and Location override 5

ADDATA = 0x0620; //ADCFG [6]: Differential voltage, CH0, 1.2 V FS, Right Aligned and Location override 6

ADDATA = 0x0720; //ADCFG [7]: Differential voltage, CH0, 1.2 V FS, Right Aligned and Location override 7

ADDATA = 0x0820; //ADCFG [8]: Differential voltage, CH0, 1.2 V FS, Right Aligned and Location override 8

ADDATA = 0x0920; //ADCFG [9]: Differential voltage, CH0, 1.2 V FS, Right Aligned and Location override 9

ADDATA = 0x0A20; //ADCFG [10]: Differential voltage, CH0, 1.2 V FS, Right Aligned and Location override 10

ADDATA = 0x0B20; //ADCFG [11]: Differential voltage, CH0, 1.2 V FS, Right Aligned and Location override 11

ADDATA = 0x0C20; //ADCFG [12]: Differential voltage, CH0, 1.2 V FS, Right Aligned and Location override 12

ADDATA = 0x0D20; //ADCFG [13]: Differential voltage, CH0, 1.2 V FS, Right Aligned and Location override 13

ADDATA = 0x0E20; //ADCFG [14]: Differential voltage, CH0, 1.2 V FS, Right Aligned and Location override 14

ADDATA = 0x0F20; //ADCFG [15]: Differential voltage, CH0, 1.2 V FS, Right Aligned and Location override 15