PIC17C752-08SLASHCL datasheet(174/328 Pages) MICROCHIP

174 / 328 page

PIC17C7XX

DS30289A-page 174

15.4

Example Program

Example 15-2 shows MPLAB-C17 ’C’ code for using

the I2C module in master mode to communicate with a

24LC01B serial EEPROM. This example uses the

PICmicro ’C’ libraries included with MPLAB-C17.

EXAMPLE 15-2: INTERFACING TO A 24LC01B SERIAL EEPROM (USING MPLAB-C17)

// Include necessary header files

#include <p17c756.h>

// Processor header file

#include <delays.h>

// Delay routines header file

#include <stdlib.h>

// Standard Library header file

#include <i2c16.h>

// I2C routines header file

#define CONTROL 0xa0

// Control byte definition for 24LC01B

// Function declarations

void main(void);

void WritePORTD(static unsigned char data);

void ByteWrite(static unsigned char address,static unsigned char data);

unsigned char ByteRead(static unsigned char address);

void ACKPoll(void);

// Main program

void main(void)

{

static unsigned char address;

// I2C address of 24LC01B

static unsigned char datao;

// Data written to 24LC01B

static unsigned char datai;

// Data read from 24LC01B

address = 0;

// Preset address to 0

OpenI2C(MASTER,SLEW_ON);

// Configure I2C Module Master mode, Slew rate control on

SSPADD = 39;

// Configure clock for 100KHz

while(address<128)

// Loop 128 times, 24LC01B is 128x8

{

datao = PORTB;

{

ByteWrite(address,datao);

// Write data to EEPROM

ACKPoll();

// Poll the 24LC01B for state

datai = ByteRead(address);

// Read data from EEPROM into SSPBUF

} while(datai != datao);

// Loop as long as data not correctly

written to 24LC01B

address++;

// Increment address

}

while(1)

// Done writing 128 bytes to 24LC01B, Loop forever

{

Nop();

}

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