Problem with IRQ's configured in DISPATCH mode.

Amit,

Without a real code, it is difficult to debug what is going wrong.

Here is an example on how to manage IRQ in Dispatch mode.

This example assume that in HalcoGen the following is setup:

I've added the following code in sys_vim.c

/* USER CODE BEGIN (1) */
void _irqDispatch(void)
{
    uint16 vector_index;
    do
    {
     vector_index = vimREG->IRQINDEX;
     (*(vimRAM->ISR[vector_index]))();
    } while(vector_index !=0);
}
/* USER CODE END */

My sys_intvecs.asm looks like:

;-------------------------------------------------------------------------------
; interrupt vectors
    .ref _irqDispatch

resetEntry
        b   _c_int00
undefEntry
        b   undefEntry
svcEntry
        b   svcEntry
prefetchEntry
        b   prefetchEntry
        b   _dabort
        b   phantomInterrupt
        b   _irqDispatch
        ldr pc,[pc,#-0x1b0]

If you want to try this example, here is the full project.5086.TMS570LS0432_Interrupt_Dispatch.zip

Thank you Jean for the reply.

The only difference in my code and the example you mentioned is i have written the IrqDispatch in assembly ....... i have attached the same for your reference.

Let me know if you need any further information. Is it possible to have a online meeting? 

Amit,

I did check your dispatcher.asm, unfortunately there is not a lot I can do.

This code is mainly your context switch. The only interesting part is:

irqDispatch: .asmfunc

   STMFD   sp!, {r0-r3,r12,lr}          ; store the user mode registers on irq-stack.

   BL      AppIrqHandler                ; Jump to the exception handler, branch with link

Could you share your AppIrqHadler code.

On power on reset, when your code crashes, can you trace back?
LR should contain the address of the faulty instruction.

We can setup a webex if you want, but I'm not sure what could be the outcome. What is your time zone?

Jean,

Thanks for the reply

My link register points to 0x00007292(Not 4 byte aligned ), but when i search the address in dis-assembly window i see the instructions are all 4 byte aligned ......

Snippet from Dis-assembly window .

0000728c: EA000013 B $C$L4
81 _memInit_();
$C$L1:
00007290: EBFFFA04 BL $../Platform_Specific/source/HL_sys_core.asm:471:490$
87 _coreInitRegisters_();
00007294: EBFFF956 BL $../Platform_Specific/source/HL_sys_core.asm:14:77$
93 _coreInitStackPointer_();

Application irq handler code looks like this

void AppIrqHandler(void)
{

U32 recv_irq = 0x00000000;

recv_irq = vimREG->IRQINDEX;

switch(recv_irq)
{

case (RTI_COMPARE0):
{

rtiCompare0Interrupt();

break;
}
case (RTI_COMPARE1):
{

rtiCompare1Interrupt();

break;
}
default:
UnimplementedIsr();
break;

}

}

My time zone is GMT + 5:30, let me know your time zone too.... 

Amit,

I assume the device you are using is either TMS570LC43xx or RM57xx. Can you confirm.

Also, can you tell me in which mode do you compile your code? ARM, Thumb2 or mix mode.

The CPU needs ARM mode for all exception. Without full visibility on your code, I don't know what else can be done.

Anyway, I've send you a friend request so we can communicate via private email.