SN8F5708 datasheet(117/204 Pages) SONIX

117 / 204 page

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SN8F5708 Series

Comparator

Datasheet Rev. 2.4

117

17.5

Sample Code

The following sample code demonstrates how to perform CMP0 with interrupt.

#define CM0LeChge

(3 << 0) // CM0P > CM0N or CM0P < CM0N

#define CM0NGreCM0P (2 << 0) // CM0P < CM0N

#define CM0PGreCM0N (1 << 0) // CM0P > CM0N

#define CMP0OEN

(1 << 3) // CMP0 output pin enable

#define CMP0Vin2V

(0 << 4) // CMP0 positive Vin connect 2.0V

#define CMP0Vin3V

(1 << 4) // CMP0 positive Vin connect 3.0V

#define CMP0Vin4V

(2 << 4) // CMP0 positive Vin connect 4.0V

#define CMP0VINP

(3 << 4) // CMP0 positive Vin connect CM0P

#define CMP0EN

(1 << 7) //enable CMP0

#define CM1LeChge

(3 << 0) // CM1P > CM1N or CM1P < CM1N

#define CM1NGreCM1P (2 << 0) // CM1P < CM1N

#define CM1PGreCM1N (1 << 0) // CM1P > CM1N

#define CMP1OEN

(1 << 3) // CMP1 output pin enable

#define CMP1Vin2V

(0 << 4) // CMP1 positive Vin connect 2.0V

#define CMP1Vin3V

(1 << 4) // CMP1 positive Vin connect 3.0V

#define CMP1Vin4V

(2 << 4) // CMP1 positive Vin connect 4.0V

#define CMP1VINP

(3 << 4) // CMP1 positive Vin connect CM1P

#define CMP1EN

(1 << 7) //enable CMP1

void CMPInit(void)

{

P1 = 0x00;

P1M = 0xC0;

// set CMP0 & CMP1 pins’ mode at pure analog pin

P3CON |= 0xC0;

//P36/P37

P2CON |= 0x60;

//P26/P25

// configure CMP0 positive Vin = 4.0V and interrupt trigger = CM0P > CM0N

// enable CMP0 and output pin

CMP0M = CMP0EN | CMP0Vin4V | CMP0OEN | CM0PGreCM0N;

// configure CMP1 positive Vin = CM1P and interrupt trigger = CM1P < CM1N

// enable CMP1 and output pin

CMP1M = CMP1EN | CMP1VINP | CMP1OEN | CM1NGreCM1P;

// enable CMP0 & CMP1 interrupt

IEN2 |= 0x30;

IEN0 |= 0x80;

//enable global interrupt

}

void CMP0Interrupt(void) interrupt ISRCmp0 //0xA3

{

if ((IRCON2 & 0x08) == 0x08) {

P16 = ~P16;

IRCON2 &= 0xF7;

//Clear CMP0F

}

void CMP1Interrupt(void) interrupt ISRCmp1 //0xAB

{

if ((IRCON2 & 0x10) == 0x10) {

P17 = ~P17;

IRCON2 &= 0xEF;

//Clear CMP1F

}

SN8F5708 Datasheet(PDF) 117 Page - SONiX Technology Company

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