CODEWITHSUNDEEP
cembeddedinterruptstm32ldiscovery
Ishmeet
Ishmeet

Reputation: 1620

STM32L-Discovery EXTI Interrupt fail

working on STM32L151xx on IAR compiler.

I am trying getting EXTI interrupt but getting nowhere, here is my code which is basically direct from sample codes but not working, 

  EXTI_InitTypeDef EXTI_InitStructure;
  NVIC_InitTypeDef NVIC_InitStructure;
  GPIO_InitTypeDef GPIO_InitStructure;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
  SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOA, EXTI_PinSource10);
  EXTI_InitStructure.EXTI_Line = EXTI_Line1;
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;  
  EXTI_InitStructure.EXTI_LineCmd = ENABLE;
  EXTI_Init(&EXTI_InitStructure);
  NVIC_InitStructure.NVIC_IRQChannel = EXTI1_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;//0x0F;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;//0x0F;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
  EXTI_GenerateSWInterrupt(EXTI_Line1);

When I HIGH the PA10 pin, I get no software interrupt, The code does not goes to EXTI1_IRQHandler(), What seems to be missing? Edit On EXTI_GetFlagStatus I am getting 0 and EXTI_GETITStatus I am getting 0

Upvotes: 2

Views: 2252

Answers (1)

Ishmeet
Ishmeet

Reputation: 1620

PA9 is connected to Line9, and PA10 Line 10 The interrupt service via EXTI9_5_IRQHandler (EXTI9_5_IRQn), and EXTI15_10_IRQHandler (EXTI15_10_IRQn)

Upvotes: 2

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