Not getting interrupt on stm32L5

[Neel]

Hi ST Team,

I have used STM32L562-edk EVK for code development. I have configured gpio as a interrupt pin. When Interrupt is generated I have not getting interrupt in ISR routine. I have validated pin using read the gpio and get as expected behavior. I have implemented below ISR.

void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)

{

// Toggle LED

}

Please help me to debug this issue.

[TDK]

You're likely getting something incorrect in the initialization. HAL_GPIO_EXTI_Callback is called by the EXTIx_IRQHandler routine, but only if it's generated correctly. If the interrupt routine is empty, nothing is going to happen. Are you using CubeMX to generate this code? Show your code.

[Neel]

Hi,

Thanks for quick reply.

Below is ISR details:

uint8_t flag = 0;

void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)

{

flag = 1;

}

Default task:

void StartDefaultTask(void *argument)

{

for(;;)

 {

Printf("%d\n", flag); // Every time i have getting zero value only

//READ GPIO Pin

printf("%d\n",HAL_GPIO_ReadPin(INT_EXTI5_GPIO_Port, INT_EXTI5_Pin)); // I have getting 1 and 0

osDelay(3000);

 }

}

I have used stm32cubeide software for generate and flashing code.

stm32cubeide version: 1.4.0

Attached STM32L5 NVIC configuration:

[KnarfB]

In the generated file stm32l5xx_it.c should be an EXTI interrupt handler generated dispatching control to your callback. You can set a breakpoint there and step through. What pin is your button? The default USER_BUTTON is PC13 not 5.

[Neel]

Hi KnarfB,

Thanks for quick reply.

I have connected I2C slave and PF5 pin is used for getting the interrupt from slave.

So, I have read PF5 gpio pin for checking the MCU getting the interrupt or not.

Below are code line.

printf("%d\n",HAL_GPIO_ReadPin(INT_EXTI5_GPIO_Port, INT_EXTI5_Pin)); // I have getting 1 and 0

So, I have get High(1) and low(0) status on this gpio pin but not getting the interrupt in ISR.

Flag value is always zero.

Thanks

[prain]

show the EXTI register values​ (after initialization).

[Neel]

Hi prain,

Below are the details of EXTI registers.

RTSR1 = 26e

FTSR1 = 220

SWIER1 = 0

RTSR2 = 0

FTSR2 = 0

IMR1 = ff9e026e

EMR1 = 0

SWIER2 = 0

EXTICR = 4002f460

Thanks

[Neel · Accepted solution]

Hi All,

Thanks for the quick response. Issue has been resolved. 

I haven't got an interrupt because I have used HAL_GPIO_EXTI_Callback instead of HAL_GPIO_EXTI_Falling_Callback.

 Thanks

[TDK]

Had no idea the L5 broke out routines by falling and rising. Thanks for reporting the solution.