microcontroller - PIC24F32KA302 Sleep mode -

i want configure pic24f32ka302 go sleep mode , wake rtc interrupt. however, after waking up, program runs again beginning. datasheet mentions that: - if assigned priority interrupt less or equal current cpu priority, device wake-up , continue code execution instruction following pwrsav instruction initiated sleep mode. - if assigned priority level interrupt source greater current cpu priority, device wake-up , cpu exception process begin. code execution continue first instruction of isr. tried both configurations results same. code below:

int main(void) { sys_init(); while(1){     __delay_ms(400);     sleep(); } return 0;}  void __attribute__ ( (interrupt, no_auto_psv) )  _rtccinterrupt(void) { ifs3bits.rtcif = 0; //to do: total_pulse += tmr1; tmr1 = 0; led = ~led;}  void interruptpriority_init(void) { intcon1bits.nstdis = 1; intcon2bits.altivt = 0; srbits.ipl = 1; ipc15bits.rtcip = 6;//6 _u2rxip = 5; _t1ip = 4; _u1rxip = 2; _hlvdip = 3;} 

the function sys_init() initializes interrupt, rtc , other peripheral modules. function runs after device wakes sleep mode. have idea or advice me? thank you

it sort of errors happening causing device reset.

did add trap routines ? if not, add code , see if 1 of trap.

also make sure don't have power drop in circuit , reset pin not getting sort of noise, can add 100nf capacitor between reset pin , gnd (of course keeping pullup).

/******************************************************************************/ /* files 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>        /* includes uint16_t definition */ #include <stdbool.h>       /* includes true/false definition */  /******************************************************************************/ /* trap function prototypes                                                   */ /******************************************************************************/  /* <other function prototypes debugging trap code may inserted here>   */  /* use if intcon2 altivt=1 */ void __attribute__((interrupt,no_auto_psv)) _oscillatorfail(void); void __attribute__((interrupt,no_auto_psv)) _addresserror(void); void __attribute__((interrupt,no_auto_psv)) _stackerror(void); void __attribute__((interrupt,no_auto_psv)) _matherror(void);  #if defined(__pic24f__)||defined(__pic24h__)  /* use if intcon2 altivt=0 */ void __attribute__((interrupt,no_auto_psv)) _altoscillatorfail(void); void __attribute__((interrupt,no_auto_psv)) _altaddresserror(void); void __attribute__((interrupt,no_auto_psv)) _altstackerror(void); void __attribute__((interrupt,no_auto_psv)) _altmatherror(void);  #endif  /* default interrupt handler */ void __attribute__((interrupt,no_auto_psv)) _defaultinterrupt(void);  #if defined(__pic24e__)  /* these additional traps in 24e family.  refer pic24e migration guide.  there no alternate vectors in 24e family. */ void __attribute__((interrupt,no_auto_psv)) _hardtraperror(void); void __attribute__((interrupt,no_auto_psv)) _dmacerror(void); void __attribute__((interrupt,no_auto_psv)) _softtraperror(void);  #endif  /******************************************************************************/ /* trap handling                                                              */ /*                                                                            */ /* these trap routines ensure device continuously loops       */ /* within each routine.  users experience 1 of these traps     */ /* can add code handle error.  basic examples trap code,      */ /* including assembly routines process trap sources, available @    */ /* www.microchip.com/codeexamples                                             */ /******************************************************************************/  /* primary (non-alternate) address error trap function declarations */ void __attribute__((interrupt,no_auto_psv)) _oscillatorfail(void) {         intcon1bits.oscfail = 0;        /* clear trap flag */         while(1); }  void __attribute__((interrupt,no_auto_psv)) _addresserror(void) {         intcon1bits.addrerr = 0;        /* clear trap flag */         while (1); } void __attribute__((interrupt,no_auto_psv)) _stackerror(void) {         intcon1bits.stkerr = 0;         /* clear trap flag */         while (1); }  void __attribute__((interrupt,no_auto_psv)) _matherror(void) {         intcon1bits.matherr = 0;        /* clear trap flag */         while (1); }  #if defined(__pic24f__)||defined(__pic24h__)  /* alternate address error trap function declarations */ void __attribute__((interrupt,no_auto_psv)) _altoscillatorfail(void) {         intcon1bits.oscfail = 0;        /* clear trap flag */         while (1); }  void __attribute__((interrupt,no_auto_psv)) _altaddresserror(void) {         intcon1bits.addrerr = 0;        /* clear trap flag */         while (1); }  void __attribute__((interrupt,no_auto_psv)) _altstackerror(void) {         intcon1bits.stkerr = 0;         /* clear trap flag */         while (1); }  void __attribute__((interrupt,no_auto_psv)) _altmatherror(void) {         intcon1bits.matherr = 0;        /* clear trap flag */         while (1); }  #endif  /******************************************************************************/ /* default interrupt handler                                                  */ /*                                                                            */ /* executes when interrupt occurs interrupt source     */ /* improperly defined or undefined interrupt handling routine.                */ /******************************************************************************/ void __attribute__((interrupt,no_auto_psv)) _defaultinterrupt(void) {         while(1); }  #if defined(__pic24e__)  /* these traps new pic24e family.  refer device interrupt chapter of frm understand trap priority. */ void __attribute__((interrupt,no_auto_psv)) _hardtraperror(void) {     while(1); } void __attribute__((interrupt,no_auto_psv)) _dmacerror(void) {     while(1); } void __attribute__((interrupt,no_auto_psv)) _softtraperror(void) {     while(1); }  #endif