[onewire] / user.c

/******************************************************************************/
/* 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;
}
Commit	Line	Data
	1	/******************************************************************************/
	2	/* Files to Include */
	3	/******************************************************************************/
	4
	5	#if defined(__XC)
	6	#include <xc.h> /* XC8 General Include File */
	7	#elif defined(HI_TECH_C)
	8	#include <htc.h> /* HiTech General Include File */
	9	#endif
	10
	11	#include <stdint.h> /* For uint8_t definition */
	12	#include <stdbool.h> /* For true/false definition */
	13
	14	#include "system.h"
	15	#include "user.h"
	16
	17	/******************************************************************************/
	18	/* User Functions */
	19	/******************************************************************************/
	20
	21	/* <Initialize variables in user.h and insert code for user algorithms.> */
	22
	23	void InitApp(void)
	24	{
	25	/* set watchdog to 4 seconds and enable it */
	26	WDTCONbits.WDTPS = 0b01100;
	27	WDTCONbits.SWDTEN = 1;
	28
	29	/* Select pins 4&5 as the uart - page 102 */
	30	APFCONbits.RXDTSEL = 0; /* RX/DT on RA1 */
	31	APFCONbits.TXCKSEL = 0; /* TX/CK on RA0 */
	32	TRISAbits.TRISA1 = 1; /* RA5 as input */
	33	TRISAbits.TRISA0 = 0; /* RA4 as output */
	34
	35	ANSELA = 0; /* no analog */
	36
	37
	38	/* enable weak pullups, clear them all */
	39	WPUA = 0;
	40	//WPUAbits.WPUA0 = 0x00000100; // RA0 pullup for 1-wire bus
	41	OPTION_REGbits.nWPUEN = 1;
	42
	43	/* Enabling transmitter 26.1.1.1 page 259 - TX/CK I/O pin */
	44	TXSTAbits.TXEN = 1;
	45	TXSTAbits.SYNC = 0;
	46	RCSTAbits.SPEN = 1;
	47	/* Enabling receiver 26.1.2 page 262 - RX/DT I/O pin */
	48	RCSTAbits.CREN = 1;
	49
	50	/* 4MHz clock, 57k6 baud */
	51	TXSTAbits.BRGH = 1;
	52	BAUDCONbits.BRG16 = 1;
	53	//SPBRG = 16; // 57k6
	54	SPBRG = 51; // 19k2
	55	//SPBRG = 103; // 9k6
	56
	57	// enable debug LED on RA4
	58	TRISAbits.TRISA4 = 0;
	59	ANSELAbits.ANSA4 = 0;
	60
	61	// setup timer1
	62
	63	// enable the timer (off for now, not gated mode)
	64	T1CONbits.TMR1ON = 0;
	65	T1GCONbits.TMR1GE = 0;
	66	T1CONbits.TMR1CS = 0b00; // instruction clock
	67	T1CONbits.T1CKPS = 0b11; // div 8
	68
	69
	70	// enable TIMER1 interupt
	71	PIE1bits.TMR1IE = 1;
	72
	73	/* Enable interrupts */
	74	INTCONbits.GIE = 1;
	75	INTCONbits.PEIE = 1;
	76
	77	/* enable uart receiver interupt */
	78	PIE1bits.RCIE = 1;
	79	}
	80