STM32 exti interrupt problem

Kernel
1

gabrydmdtek wrote on Friday, July 02, 2010:

Hi,
when i use exti interrupt only 1/3 works fine.
configure exti:

GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource0);
   GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource1);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource15);

EXTI_ClearITPendingBit(EXTI_Line0);
EXTI_InitStructure.EXTI_Line = EXTI_Line0 | EXTI_Line1 | EXTI_Line15;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);

and NVIC:
/* Set the Vector Table base location at 0x08000000 */
NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);

/* Configure one bit for preemption priority */
             NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);

// Enable the EXTI Line0 Interrupt
NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority=1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

// Enable the EXTI Line1 Interrupt
NVIC_InitStructure.NVIC_IRQChannel = EXTI1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority=0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

// Enable the EXTI Line15_10 Interrupt
NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority=2;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

but only exti 0 works.
i’ve tryed to comment other interrupts except line 1 but no results found.
can anyone help me?

2

davedoors wrote on Friday, July 02, 2010:

Are you sure this is a FreeRTOS issue?

3

gabrydmdtek wrote on Friday, July 02, 2010:

Yes, i’ve a previous code without freertos and it works perfectly on the same hardware.

4

davedoors wrote on Friday, July 02, 2010:

In which case, can you post the interrupt handler code too please.  Use the Codify Text tags to stop it loosing its formatting.

5

gabrydmdtek wrote on Friday, July 02, 2010:

So, i’ve found where is the error. A variable goes out of memory before the interrupt was reached.
i’m sorry for the mistake.
Thank you for all.