Stm32L4R5 GPIO Interrupt Enable causes issue.(FreeRTOS)

[DajacInc_PO (Pratham)]

@jefftenney

Can you post the code you use to configure and enable the GPIO interrupt?

void testInitGPIOInterrupt( void )
{

	// PC 13
	uint8_t pinNumber;
	uint32_t temp;

	pinNumber = 13;

	RCC->AHB2ENR |= ( 1 << RCC_AHB2ENR_GPIOCEN_Pos );

	RCC->APB2ENR  |= ( 1 << RCC_APB2RSTR_SYSCFGRST_Pos );
	SYSCFG->EXTICR[(pinNumber/4)] &= ~(0xF << ((pinNumber % 4) * 4));
	SYSCFG->EXTICR[(pinNumber/4)] |=  (0x2 << ((pinNumber % 4) * 4));

	//enable the exti interrupt delivery using IMR Interrupt mask register 1
	EXTI->IMR1 |= ( 1 << pinNumber );
	//  Enable the 'rising edge' trigger
	EXTI->RTSR1 |= ( 1 << pinNumber );
	// Disable the 'falling edge' trigger
	EXTI->FTSR1 &= ~( 1 << pinNumber );

	GPIOC->MODER &= ~( 0x3 << ( pinNumber*2 ) );
	GPIOC->PUPDR &= ~( 0x3 << ( pinNumber*2 ) );
	GPIOC->PUPDR |= ( 0x0 << ( pinNumber*2 ) );

	// Enable IRQ
	NVIC_SetPriority( EXTI15_10_IRQn, 6 );
	NVIC_EnableIRQ ( EXTI15_10_IRQn );

}

@jefftenney

• Can you try to enable the GPIO interrupt from inside one of your tasks?
• Can you step through vTaskStartScheduler(), with a breakpoint set at the beginning of vPortSVCHandler() so you can keep stepping from there when the breakpoint is hit. Maybe you’ll catch where things are going wrong when FreeRTOS is starting.

I will try these suggestions.

FreeRTOSConfig.h (5.2 KB)