embOS for ARM version 4.30 with IAR workbench 7.8

using STM32 family STM32F303VE controller

Whenever I try to use OS interfaces its throwing os error 166(OS_ERR_CPU_STATE_ISR_ILLEGAL)


Ex Interfaces;
OS_EnterNestableInterrupt();
OS_SignalEvent(JUPEvent, &TCB_JUPEvent);

here is the code snipet of ISR handler

void TIM3_IRQHandler(void)
{
OS_EnterNestableInterrupt();

// Check for Timer Status register to know whether interrupt has occured
if(((TIM3->SR & (DWORD)TIM_SR_UIF) == (DWORD)TIM_SR_UIF) != RESET)
{
// Check for Update Interrupt Enable bit
if(((TIM3->DIER & (DWORD)TIM_DIER_UIE) == (DWORD)TIM_DIER_UIE) != RESET)
{
TIM3->SR &=~((DWORD)TIM_DIER_UIE) ;

}
}

OS_LeaveNestableInterrupt();
}


please help..

i am using valid embOS license version.

i gave ex for OS_SignalEvent().......


i am facing issue with both timer interrupt and os interfaces.

i placed code for only timer interrupt....

here is the full code

//timer init function
void Timer3Init(void)
{

// Enable Clock for TIMER3
RCC->APB1ENR |= RCC_APB1ENR_TIM3EN;

// Set the Edge-Aligned mode
TIM3->CR1 &= ~(DWORD)(TIM_CR1_CMS);

//Direction as Down counter
TIM3->CR1 |= (DWORD)TIM_CR1_DIR;

//set update request
//This is to trigger interrupt only when there is underflow/overflow
TIM3->CR1 |= (DWORD)TIM_CR1_URS;

// Set the Timer clock frequency same as sampling clock for digital filters
TIM3->CR1 &= ~((DWORD)TIM_CR1_CKD);

// Set the Prescaler value as 71 so that tie timer peripheral runs at 1 MHz
TIM3->CCMR1|= TIM_CCMR1_OC1PE;
TIM3->PSC = 71;
// Set the Auto reload value as 3000 for 3ms

TIM3->ARR = (DWORD)10000;//((timerClkFreq / TIMER_CLK_DIVISON) * (DWORD)TIMER_THREEMILLISECOND);
// Update Generation bit is SET so that the counter loaded Autoreload value automatically during downcounter
TIM3->EGR |= (DWORD)TIM_EGR_UG;


// Update interrupt enable
TIM3->DIER |= (DWORD)TIM_DIER_UIE;

// Update Generation bit is SET so that the counter loaded Autoreload value automatically during downcounter
TIM3->EGR |= (DWORD)TIM_EGR_UG;


// Set the Interrupt Priority and Sub-Priority
I_STM_NVIC_SetPriority(TIM3_IRQn, 04, 00);

// Enable the TIMER2 Interrupt
I_STM_NVIC_EnableIRQ(TIM3_IRQn);
// Enable the Counter
TIM3->CR1 |= (DWORD)TIM_CR1_CEN;
}

///timer irq function
void TIM3_IRQHandler(void)

{

OS_EnterNestableInterrupt();



// Check for Timer Status register to know whether interrupt has occured

if(((TIM3->SR & (DWORD)TIM_SR_UIF) == (DWORD)TIM_SR_UIF) != RESET)

{

// Check for Update Interrupt Enable bit

if(((TIM3->DIER & (DWORD)TIM_DIER_UIE) == (DWORD)TIM_DIER_UIE) != RESET)

{

TIM3->SR &=~((DWORD)TIM_DIER_UIE) ;



}

}



OS_LeaveNestableInterrupt();

}

i have checked that one all ready ...
we are configured IRQ_PRIORITYGROUP_4 .

so we can use priority 4 bits ( 0- 15)

I have done...but still error persists.......

Thank you so much for your quick response....

Here things are working....

some interrupts configures as zero priority....