MCP9808 datasheet(44/52 Pages) MICROCHIP

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MCP9808

DS25095A-page 46

/********************************************************************

Function Name:

i2c_start

Return Value:

void

Parameters:

void

Description:

Send I2C Start Command

********************************************************************/

void i2c_start(void) {

PIR1bits.SSPIF = 0;

//clear flag

while (SSPSTATbits.BF );

// wait for idle condition

SSPCON2bits.SEN = 1;

// initiate START condition

while (!PIR1bits.SSPIF) ;

// wait for a flag to be set

PIR1bits.SSPIF = 0;

// clear flag

}

/********************************************************************

Function Name:

i2c_repStart

Return Value:

void

Parameters:

void

Description:

Resend I2C Start Command

********************************************************************/

void i2c_repStart(void) {

PIR1bits.SSPIF = 0; // clear flag

while ( SSPSTATbits.BF ) ;

// wait for idle condition

SSPCON2bits.RSEN = 1;

// initiate Repeated START condition

while (!PIR1bits.SSPIF) ;

// wait for a flag to be set

PIR1bits.SSPIF = 0; // clear flag

}

/********************************************************************

Function Name:

i2c_stop

Return Value:

void

Parameters:

void

Description:

Send I2C Stop command

********************************************************************/

void i2c_stop(void) {

PIR1bits.SSPIF = 0; // clear flag

while ( SSPSTATbits.BF ) ;

// wait for idle condition

SSPCON2bits.PEN = 1;

// Initiate STOP condition

while (!PIR1bits.SSPIF) ;

// wait for a flag to be set

PIR1bits.SSPIF = 0; // clear flag

}

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