system.c

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

/* Device header file */
#if defined(__XC16__)
    #include <xc.h>
#elif defined(__C30__)
    #if defined(__PIC24E__)
        #include <p24Exxxx.h>
    #elif defined (__PIC24F__)||defined (__PIC24FK__)
    #include <p24Fxxxx.h>
    #elif defined(__PIC24H__)
    #include <p24Hxxxx.h>
    #endif
#endif

#include <stdint.h>          /* For uint32_t definition */
#include <stdbool.h>         /* For true/false definition */

#include "system.h"          /* variables/params used by system.c */

/******************************************************************************/
/* System Level Functions                                                     */
/*                                                                            */
/* Custom oscillator configuration funtions, reset source evaluation          */
/* functions, and other non-peripheral microcontroller initialization         */
/* functions get placed in system.c                                           */
/*                                                                            */
/******************************************************************************/

/* Refer to the device Family Reference Manual Oscillator section for
information about available oscillator configurations.  Typically
this would involve configuring the oscillator tuning register or clock
switching useing the compiler's __builtin_write_OSCCON functions.
Refer to the C Compiler for PIC24 MCUs and dsPIC DSCs User Guide in the
compiler installation directory /doc folder for documentation on the
__builtin functions. */

/* TODO Add clock switching code if appropriate.  An example stub is below.   */
void ConfigureOscillator(void)
{

#if 0

        /* Disable Watch Dog Timer */
        RCONbits.SWDTEN = 0;

        /* When clock switch occurs switch to Prim Osc (HS, XT, EC)with PLL */
        __builtin_write_OSCCONH(0x03);  /* Set OSCCONH for clock switch */
        __builtin_write_OSCCONL(0x01);  /* Start clock switching */
        while(OSCCONbits.COSC != 0b011);

        /* Wait for Clock switch to occur */
        /* Wait for PLL to lock, if PLL is used */
        /* while(OSCCONbits.LOCK != 1); */

#endif
        
}