main.c

#include <xc.h>
#include "16x2LCDHD44780.h"
#include "msspi2c.h"

__CONFIG(LVP_OFF & FCMEN_OFF & IESO_OFF & BOREN_OFF & PWRTE_ON & WDTE_OFF & FOSC_HS);

/*
Processor Type: PIC16F887

Configuration Word 1

Debug Disabled (default - controlled by PICkit 2)
Low Voltage Programming Disabled (LVP)
Fail Safe Clock Monitor Disabled (FCMEN)
Internal External Oscillator Switchover Disabled (IESO)
Brown Out Reset Disabled (BOR)
Program Code External Read Protect Disabled (default)
Data EEPROM External Read Protect Disabled (default)
RE3 has MCLR function (default)
Power Up Timer On (PWRTE)
Watchdog Timer Off (WDTE)
High Speed Oscillator Mode Enabled (FOSC_HS)

Configuration Word 2

Brown Out Reset Voltage 4V (default)
Program Memory Write Protect Disabled (default)
*/

#define _XTAL_FREQ 16000000
#define _I2C_BAUD 400000
#define _UART_BAUD 31250
#define _I2C_BRG ((_XTAL_FREQ / _I2C_BAUD) / 4) - 1
#define _UART_BRG ((_XTAL_FREQ / _UART_BAUD) / 16) - 1

void main(void)
{
    PORTA = 0x00;               //clear PORTA latch
    PORTB = 0x00;               //clear PORTB latch
    PORTC = 0x00;               //clear PORTC latch
    PORTD = 0x00;               //clear PORTD latch
    PORTE = 0x00;               //clear PORTE latch
    ANSEL = 0x00;               //all port pins digital I/O
    ANSELH = 0x00;
    TRISA = 0x00;               //RA0-RA5 output
    TRISB = 0x00;               //RB0-RB7 output
    TRISC = 0b11011001;
    /*
    RC0 - Write Enable (I2C EEPROM)
    RC1 - Output
    RC2 - Output
    RC3 - SCL
    RC4 - SDA
    RC5 - Output
    RC6 - UART TxD
    RC7 - UART RxD
    */
    TRISD = 0x00;               //RD0-RD7 output
    TRISE = 0x00;               //RE0-RE2 output

    //I2C Initialization

    SSPADD = _I2C_BRG;          //init baud rate for I2C
    SMP = 0x00;                 //enable slew rate control for 400kHz operation
    SSPCON2 = 0xFF;             //everything idle
    SSPCON = 0b00101000;        //I2C Master Mode, Baud = Fosc / 4*(SSPADD+1)

    //UART Initialization

    BAUDCTL = 0x00;             //non-inverted data on TxD/RxD, disable baud rate detection
    SPBRG = _UART_BRG;          //init baud rate for serial port
    SPBRGH = 0x00;
    TXSTA = 0b00100100;         //enable tx, high speed brg
    RCSTA = 0b10010000;         //enable rx, enable serial port

    i2cStartBit();

    while(1);

}