gistfile1.txt

//******************************************************************************
// notes
//******************************************************************************
/*
 PIC16F1618 (chip in use)
 project description here

 
*/
 
//******************************************************************************
// includes
//******************************************************************************
#include <xc.h>
#include <stdbool.h>
#include <stdint.h>

//******************************************************************************
// defines
//******************************************************************************
//my pin macros
#define _PIN_SET(pt,pn,m)           LAT##pt##pn = m
#define _PIN_TOGGLE(pt,pn)          LAT##pt##pn = ~LAT##pt##pn
#define _PIN_VALUE(pt,pn)           R##pt##pn
#define _PIN_IO(pt,pn,m)            TRIS##pt##pn = m
#define _PIN_PU(pt,pn,m)            WPU##pt##pn = m
#define _PIN_DRIVE(pt,pn,d)         HID##pt##pn = d
#define _PIN_DRAIN(pt,pn,d)         OD##pt##pn = d
//instead of using ANS##pt##pn = m; , use byte method on ANSELx register
//as not all pins analog - this will result in set/clear of a ANSELx bit
//(if bit not implemented, no harm done and will keep PIN_INIT always happy)
#define _PIN_MODE(pt,pn,m)          do{ if( m ) ANSEL##pt |= 1<<pn; \
                                        else ANSEL##pt &= ~(1<<pn); } while(0)
#define _PIN_INIT(pt,pn,m,io,pu,v)  _PIN_SET(pt,pn,v); _PIN_PU(pt,pn,pu); \
                                    _PIN_MODE(pt,pn,m); _PIN_IO(pt,pn,io)


//need to expand pp by calling above macros
#define PIN_SET(pp,m)               _PIN_SET(pp,m)
#define PIN_TOGGLE(pp)              _PIN_TOGGLE(pp)
#define PIN_VALUE(pp)               _PIN_VALUE(pp)
#define IO_IN                       1
#define IO_OUT                      0
#define PIN_IO(pp,m)                _PIN_IO(pp,m)
#define PU_ON                       1
#define PU_OFF                      0
#define PIN_PU(pp,m)                _PIN_PU(pp,m)
#define DRIVE_HIGH                  1
#define DRIVE_NORMAL                0
#define PIN_DRIVE(pp,d)             _PIN_DRIVE(pp,d)
#define DRAIN_OPEN                  1
#define DRAIN_NORMAL                0
#define PIN_DRAIN(pp,d)             _PIN_DRAIN(pp,d)
#define MODE_ANA                    1
#define MODE_DIG                    0
#define PIN_MODE(pp,m)              _PIN_MODE(pp,m)
#define PIN_INIT(pp,m,io,pu,v)      _PIN_INIT(pp,m,io,pu,v)


//clock freq
#define _XTAL_FREQ              4000000 //4,000,000

//pin defines
#define LED_A   A,0
#define LED_B   A,1
#define LED_C   A,2
#define LED_D   A,3

//******************************************************************************
// global variables
//******************************************************************************


//******************************************************************************
// pause ms milliseconds (cpu keeps running)
//******************************************************************************
void pause(uint16_t ms)
{
    for( ; ms; ms-- ) __delay_ms(1);
}

//******************************************************************************
// oscillator init
//******************************************************************************
void osc_init()
{
    //default is 500khz MF
    OSCCONbits.IRCF = 0b1101; //4MHz
}

//******************************************************************************
// pins init
//******************************************************************************
void pins_init()
{
    //setup pins (can optimize to single register writes if ever needed)
    PIN_INIT( LED_A, MODE_DIG, IO_OUT, PU_OFF, 0 );
    PIN_INIT( LED_B, MODE_DIG, IO_OUT, PU_OFF, 0 );
    PIN_INIT( LED_C, MODE_DIG, IO_OUT, PU_OFF, 0 );
    PIN_INIT( LED_D, MODE_DIG, IO_OUT, PU_OFF, 0 );
}

//******************************************************************************
// main
//******************************************************************************
void main(void)
{
    osc_init(); 
    pins_init();
    
    for(;;){
        PIN_TOGGLE( LED_A );
        PIN_TOGGLE( LED_B );
        PIN_TOGGLE( LED_C );
        PIN_TOGGLE( LED_D );
        pause(500);
    }
}