EXTI11 HAL

[ferrario]

Posted on October 06, 2016 at 13:48

I am trying to make EXTI11 work using the HAL libraries and run into troubles.

This is my configuration   /*Configure GPIO pin : EXT11_Pin */   GPIO_InitStruct.Pin = GPIO_PIN_11;   GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING_FALLING;   GPIO_InitStruct.Pull = GPIO_PULLUP;   HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);   HAL_NVIC_SetPriority(EXTI15_10_IRQn, 2, 0);  //some time later   HAL_NVIC_EnableIRQ(EXTI15_10_IRQn);       //EXT11 file stm32f4it.c void EXTI10_15_IRQHandler(void) {   /* Handle PD11 interrupt */     HAL_GPIO_EXTI_IRQHandler(GPIO_PIN_11); } //file interruptcallbacks.c void HAL_GPIO_EXTI_Callback (uint16_t GPIO_Pin) {         if (GPIO_Pin==

GPIO_PIN_11

)     {           // FALLING           if (EXTI->FTSR & 0x0400)           {               //ENABLE RISING               EXTI->FTSR &= 0xFBFF;               EXTI->RTSR |= 0x0400;           }           //RISING           else if ((EXTI->RTSR & 0x0400)!=0)           {               //ENABLE FALLING               EXTI->RTSR &= 0xFBFF;               EXTI->FTSR |= 0x0400;                              }           }     } the issue I am facing, is that, as soon as I toggle the interrupt line, code jumps into Default_Handler. Disabling the interrupt works as expected. Thanks Fabio  

[Tesla DeLorean]

Posted on October 06, 2016 at 15:00

Use the right name, it is 15_10 not 10_15, otherwise the Vector Table linkage will fail.

EXTI10_15_IRQHandler(void) // Bad

EXTI15_10_IRQHandler(void) // Good

[ferrario]

Posted on October 06, 2016 at 18:21

Thanks Clive,

This was a typo in pasting the code. I copied the ISR from the startup code. I must be doing something else wrong. Still no joy. Fabio

[Tesla DeLorean]

Posted on October 06, 2016 at 18:44

I must be doing something else wrong.

0x0400 is 2100x0800 is 211

[ferrario]

Posted on October 10, 2016 at 13:26

Dear Clive,

thanks for your help. You are right. Although this fixes my interrupt callback routine I never have the joy to see it working because I routinely jump into default_handler. So my question : sure the obvious idea is that I don't have a handler for this event, but the

EXTI15_10_IRQHandler(void)

routine is there and is the one the startup code looks for, it should override the weak call to the default hanlder where I indeed land. Why doesn´t CUBEMx automatically generate also this ISR? I wrote a mini application to test EXT11 and experience the same issue.. Is there any example application I can use for reference? Any help is really appriciated. Thanks

[Tesla DeLorean]

Posted on October 10, 2016 at 18:39

I can't be drawn into issues with HAL/CubeMX

You'd perhaps want to simplify the handler to clear the right pin, and toggle a GPIO or something. That's what I'd start with using the SPL.

[Tesla DeLorean]

Posted on October 10, 2016 at 21:00

// STM32 EXTI11 STM32F4 Discovery - sourcer32@gmail.com
// Loop PC10 to PC11 to demonstrate handler
#include ''stm32f4_discovery.h''
/**************************************************************************************/
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE); /* GPIOC clock enable */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOC, &GPIO_InitStructure);
GPIO_SetBits(GPIOC, GPIO_Pin_10);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN;
GPIO_Init(GPIOC, &GPIO_InitStructure);
}
/**************************************************************************************/
void EXTI_Configuration(void)
{
EXTI_InitTypeDef EXTI_InitStructure;
/* Enable SYSCFG clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
/* Configure EXTI Line11 */
EXTI_InitStructure.EXTI_Line = EXTI_Line11;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
/* Connect EXTI Line11 to PC11 pin */
SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOC, EXTI_PinSource11); 
}
/**************************************************************************************/
void EXTI15_10_IRQHandler(void)
{
if (EXTI_GetITStatus(EXTI_Line11) != RESET)
{
EXTI_ClearITPendingBit(EXTI_Line11);
/* Toggle LED3 : End of Transfer */
STM_EVAL_LEDToggle(LED3);
// Add code here to process things
}
}
/**************************************************************************************/
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
/* Enable the EXTI IRQ Channel */
NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
/**************************************************************************************/
int main(void)
{
GPIO_Configuration();
NVIC_Configuration();
EXTI_Configuration();
STM_EVAL_LEDInit(LED3); /* Configure LEDs to monitor program status */
STM_EVAL_LEDOn(LED3); /* Turn LED3 on, toggling means it working */
while(1) // Don't want to exit
{
volatile int i;
for(i=0; i<
10000000
; i++);
GPIOC->ODR ^= GPIO_Pin_10; /* Connect PC10 to PC11 to make LED3 toggle */
}
}
/**************************************************************************************/
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t* file, uint32_t line)
{
/* User can add his own implementation to report the file name and line number,
ex: printf(''Wrong parameters value: file %s on line %d

'', file, line) */
/* Infinite loop */
while (1)
{
}
}
#endif
/**************************************************************************************/