SN8F5708 datasheet(132/204 Pages) SONIX

132 / 204 page

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SN8F5708 Series

ADC

Datasheet Rev. 2.4

132

19.7

Sample Code

The following sample code demonstrates how to perform ADC to convert AIN5 with interrupt.

#define ADCAIN14_VDD

(3 << 0) //AIN14 = VDD

#define ADCAIN14_4V

(2 << 0) //AIN14 = 4.0V

#define ADCAIN14_3V

(1 << 0) //AIN14 = 3.0V

#define ADCAIN14_2V

(0 << 0) //AIN14 = 2.0V

#define ADCInRefVDD

(1 << 2) //internal reference from VDD

#define ADCExLowRef

(1 << 6) //low reference from AVREFL/P5.5

#define ADCExHighRef

(1 << 7) //high reference from AVREFH/P5.4

#define ADCSpeedDiv16 (0 << 4) //ADC clock = fosc/16

#define ADCSpeedDiv8

(1 << 4) //ADC clock = fosc/8

#define ADCSpeedDiv1

(2 << 4) //ADC clock = fosc/1

#define ADCSpeedDiv2

(3 << 4) //ADC clock = fosc/2

#define ADCChannelEn

(1 << 6) //enable ADC channel

#define SelAIN5

(5 << 0) //select ADC channel 5

#define ADCStart

(1 << 6) //start ADC conversion

#define ADCEn

(1 << 7) //enable ADC

#define EADC

(1 << 3) //enable ADC interrupt

#define ClearEOC

0xDF;

unsigned int ADCBuffer;

// data buffer

void ADCInit(void)

{

P1 = 0x00;

P1M = 0x80;

// set AIN5 pin's mode at pure analog pin

P4CON |= 0x20;

//AIN5/P45

P4M

&= 0xDF;

//input mode

P4UR &= 0xDF;

//disable pull-high

// configure ADC channel and enable ADC.

ADM = ADCEn | SelAIN5;

// enable channel and select conversion speed

ADR = ADCChannelEn | ADCSpeedDiv1;

// configure reference voltage

VREFH = ADCExLowRef | ADCInRefVDD;

// set external low reference pin's mode at pure analog pin

P5CON |= 0x20;

//AVREFL/P55

P5M &= 0xDF;

//input mode

P5UR &= 0xDF;

//disable pull-high

// enable global interrupt

IEN0 |= 0x80;

//enable ADC interrupt

IEN2 |= EADC;

// start ADC conversion

ADM

|= ADCStart;

}

SN8F5708 Datasheet(PDF) 132 Page - SONiX Technology Company

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