Dspic 30 Adress Trap problem

i! I have been searching the web for the error generating my adress error trap every 24 hours typ. And i found the solution in the errata

module 9,

//*******************************************

1. Module: Interrupting a REPEAT Loop When interrupt nesting is enabled (or NSTDIS(INTCON1) bit is '0'), the following sequence of events will lead to an Address Error trap:
2. REPEAT-loop is active
3. An interrupt is generated during the execution of the REPEAT-loop.
4. The CPU executes the Interrupt Service Routine (ISR) of the source causing the interrupt.
5. Within the ISR, when the CPU is executing the first instruction cycle of the 3-cycle RETFIE (Return-from-interrupt) instruction, a second interrupt is generated by a source with a higher interrupt priority. Work around Processing of Interrupt Service Routines should be disabled while the RETFIE instruction is being executed. This may be accomplished in two different ways:
6. Place a DISI instruction immediately before the RETFIE instruction in all interrupt service routines of interrupt sources that may be interrupted by other higher priority interrupt sources (with priority levels 1 through 6). This is shown in Example 9 in the Timer1 ISR. In this example, a DISI instruction inhibits level 1 through level 6 interrupts for 2 instruction cycles, while the RETFIE instruction is executed. /***********************************

I have used #define DISI_PROTECT(X){__asm__ volatile ("DISI #0x1FFF"); X; DISICNT=0;}

for protecting the flag and when enabling interrupt. But i dont know how to implement the followinf soulution in my c compiler C30, Mplab.

/************************************

1. Immediately prior to executing the RETFIE instruction, increase the CPU priority level by modifying the IPL (SR) bits to '111' as shown in Example 10. This will disable all interrupts between priority levels 1 through 7.

Assembler code __T1Interrupt: ;Timer1 ISR PUSH W0 ....... BCLR IFS0, #T1IF MOV.B #0xE0, W0 MOV.B WREG, SR POP W0 RETFIE ;Another interrupt occurs ;here and it is processed ;correctly /*********************************

My timer interrupt looks as following /********************************* void _ISR _T1Interrupt(void) {

uint32 nTimertickLowpower; DISI_PROTECT(T1IF = 0;); //protects the flag change se

DISI_PROTECT(TMR1=0x0000); //Clear contents of the timer_1 register // Clear the Timer1 Interrupt flag Status bit. if(g_MeasureNow) { ADON = 0; // debug...turn AD off DISI_PROTECT(ADIF = 0;); // debug....clear ad flag.. ADON = 1; // Turn AD module on CH0SA = g_acChanMap[g_uSampChan]; // CH0+ input SAMP = 1; // Turn AD convertion on(sampling off) g_WaitForDone = true;

g_nTimerTick++;

//Special for handling the fact that thirdspeed is 64/3 = 21 +

21 + 22; Every third case wait one tick more. if(g_LowSpeed && (!IsTrigged() || g_bContinous)) //continous is sampling at 1024 hz. { if(g_uCounter = 2 ) { nTimertickLowpower = g_nTimerTickComp + 1;

} } else {

nTimertickLowpower = g_nTimerTickComp; }

if(g_nTimerTick >= nTimertickLowpower) //tick >= 22,3333333 64/3

21 + 21 + 22 = 64 { if(g_uCounter >= 2) { g_uCounter = 0; } else { g_uCounter++; }

g_ulHiGetTick += PR1_SLOW; g_nTimerTick = 0; g_TestOther = true; uint16 ulCurTime = g_ulHiGetTick & 0x8000; if(ulCurTime != g_ulLastTime) { (*g_pulTime)++; g_ulLastTime = ulCurTime; } } // Move from AD interrupt to here, to use idle mode better } else { if(T1CON_TCS) g_ulHiGetTick += PR1_SLOW; else g_ulHiGetTick += (PR1_SLOW/2); g_TestOther = true;

uint16 ulCurTime = g_ulHiGetTick & 0x8000; if(ulCurTime != g_ulLastTime) { (*g_pulTime)++; g_ulLastTime = ulCurTime; } } // end of interrupt } /*****************************************

Help would be greatly appitiated.

/martin