/******************************************************************************/
/* Files to Include                                                           */
/******************************************************************************/

#if defined(__XC)
    #include <xc.h>         /* XC8 General Include File */
#elif defined(HI_TECH_C)
    #include <htc.h>        /* HiTech General Include File */
#endif

#include <stdint.h>         /* For uint8_t definition */
#include <stdbool.h>        /* For true/false definition */

#include "system.h"
#include "user.h"

/******************************************************************************/
/* User Functions                                                             */
/******************************************************************************/

/* <Initialize variables in user.h and insert code for user algorithms.> */

void InitApp(void)
{
    /* set watchdog to 4 seconds and enable it */
    WDTCONbits.WDTPS = 0b01100;
    WDTCONbits.SWDTEN = 1;
   
    /* Select pins 4&5 as the uart - page 102 */
    APFCONbits.RXDTSEL = 0; /* RX/DT on RA1 */
    APFCONbits.TXCKSEL = 0; /* TX/CK on RA0 */
    TRISAbits.TRISA1 = 1;   /* RA5 as input  */
    TRISAbits.TRISA0 = 0;   /* RA4 as output */

    ANSELA = 0; /* no analog */


    /* enable weak pullups, clear them all */
    WPUA = 0;
    //WPUAbits.WPUA0 = 0x00000100; // RA0 pullup for 1-wire bus
    OPTION_REGbits.nWPUEN = 1;

    /* Enabling transmitter 26.1.1.1 page 259 - TX/CK I/O pin */
    TXSTAbits.TXEN = 1;
    TXSTAbits.SYNC = 0;
    RCSTAbits.SPEN = 1;
    /* Enabling receiver 26.1.2 page 262 - RX/DT I/O pin */
    RCSTAbits.CREN = 1;

    /* 4MHz clock, 57k6 baud */
    TXSTAbits.BRGH = 1;
    BAUDCONbits.BRG16 = 1;
    //SPBRG = 16; // 57k6
    SPBRG = 51; // 19k2
    //SPBRG = 103; // 9k6

    // enable debug LED on RA4
    TRISAbits.TRISA4 = 0;
    ANSELAbits.ANSA4 = 0;

    // setup timer1

    // enable the timer (off for now, not gated mode)
    T1CONbits.TMR1ON = 0;
    T1GCONbits.TMR1GE = 0;
    T1CONbits.TMR1CS = 0b00; // instruction clock
    T1CONbits.T1CKPS = 0b11; // div 8
    

    // enable TIMER1 interupt
    PIE1bits.TMR1IE = 1;

    /* Enable interrupts */
    INTCONbits.GIE = 1;
    INTCONbits.PEIE = 1;

    /* enable uart receiver interupt */
    PIE1bits.RCIE = 1;
}