IRQ interrupt Reseting at wake up

satishperumal — Wed, 10 Oct 2012 10:27:43 GMT

hi,

i am using Mc9s12xEQ512, micro hsc12 compiler.

i am facing an issue with IRQ interrupt wake up, i am using three other wake ups, XIRQ and 2 kwp wakeup, i am not having any issue, but when i am waking up the system with IRQ interrupt, the system is Resetting instead of wake up,

i am writting the details about the initalization and code flow for sleep and wake up

//++++++++++++++++++++++++++++++++++++++++++++++++++++++

Vector table location showing the Address for IRQ

UnimplementedISR, /* 0xFFE0 Enhanced Capture Timer channel 7 */

UnimplementedISR, /* 0xFFE2 Enhanced Capture Timer channel 6 */

UnimplementedISR, /* 0xFFE4 Enhanced Capture Timer channel 5 */

UnimplementedISR, /* 0xFFE6 Enhanced Capture Timer channel 4 */

UnimplementedISR, /* 0xFFE8 Enhanced Capture Timer channel 3 */

ECTCH2_ISR_Read_PlsInput, /* 0xFFEA Enhanced Capture Timer channel 2 */

ECTCH1_ISR_Read_PlsInput, /* 0xFFEC Enhanced Capture Timer channel 1 */

ECTCH0_ISR_Read_PlsInput, /* 0xFFEE Enhanced Capture Timer channel 0 */

UnimplementedISR, /* 0xFFF0 Real Time Interrupt */

IRQ_ISR, /* 0xFFF2 IRQ */

XIRQ_ISR,

UnimplementedISR, /* 0xFFF6 SWI */

UnimplementedISR, /* 0xFFF8 Unimplemented instruction trap */

UnimplementedISR, /* 0xFFFA COP failure reset */

UnimplementedISR, /* 0xFFFC Clock monitor fail reset */

/_______________________________________________________________________

Code involving the sleep and wake up

void Init_Wakeup_modules(void){

IRQCR.byte = 0xC0; //IRQ pin is connected to interrupt logic, interrupt is

//triggered on fallinge edge

PPSP.byte = 0x01; //Select active high interrupt for Parking lamp and active low interrupt for Door open

PIEP.byte = 0x03; //Enable KWP0 and KWP1 wakeup interrupts

}

/* This function checks for the sleep and wakeup control inputs, if not available controller is forced to STOP mode */

void DisableWakeupIntr(void){

IRQCR.byte = 0; //Disable external interrupts

PIEP.byte = 0x00; //Disable KWP0 and KWP1 wakeup interrupts

Init_WakeUp();

Wkup_Int_Disabled = 1;

}

void EnableSleep(void){

Init_Wakeup_modules();

Wkup_Int_Disabled = 0;

//--------------------------Port pins disables for power down operation-----------------------

SPI0.spicr1.bit.spe = 0;

SPI1.spicr1.bit.spe = 0;

IIC0.ibcr.bit.iben = 0;

Dig_OP_Init();

Test2_SWsupply(0);

asm ANDCC #0x6F; //clear S bit - enable the stop mode. If the S bit is not

//cleared then STOP instruction has no effect and is

//executed as a dummy instruction NOP.

asm STOP; //Invoke the Stop mode

Wakeup_Init();

//_Startup(); //Go to startup

//Wakeup_Init(); // do only init variable which is required after sleep

// commented to test the issue of no wakeup after sleep

}

/==========================================================================

//==============================================================================

//IRQ_ISR

//==============================================================================

#ifdef __MWERKS__

#pragma TRAP_PROC

#else

static @interrupt @near

#endif

interrupt void IRQ_ISR(void)

{

//-------------------------interrupt

}

i have also attached the power module of my micro and circuitry involving the IRQ for your REF.

Re: IRQ interrupt Reseting at wake up

satishperumal — Wed, 10 Oct 2012 10:38:03 GMT

in my previous post , the IRQ _SChematics is not clearly visible, please find the attached IRQ schematics,

topic IRQ interrupt Reseting at wake up in S12 / MagniV Microcontrollers

IRQ interrupt Reseting at wake up

Re: IRQ interrupt Reseting at wake up