Posted on September 08, 2013 at 06:54
My question is probably simple. Can I configure external interrupts triggered by PA10, PA11, PA12 and PA13?
Studing the EXTI example I understood something like this:
PA0 is connected to EXTI_Line0 and about the handler: EXTI0_IRQHandler(). So...
For PA10,11,12 and 13 how should it be?
I was trying the following to configure the pins as IT sources:
void GPIO_IT_Setup()
{
EXTI_InitTypeDef EXTI_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
// Configure IT sources
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_11 | GPIO_Pin_12 | GPIO_Pin_13;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
// Connect sources to EXTI Lines
GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource10);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource11);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource12);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource13);
// Configure Button EXTI lines
EXTI_InitStructure.EXTI_Line = EXTI_Line10 | EXTI_Line11 | EXTI_Line12 | EXTI_Line13;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
// Enable EXTI Interrupts
NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
And the following to configure the handlers:
void EXTI10_IRQnHandler(void)
{
if (EXTI_GetITStatus(EXTI_Line10) != RESET)
{
// Random code
EXTI_ClearITPendingBit(EXTI_Line10);
}
}
void EXTI11_IRQnHandler(void)
{
if (EXTI_GetITStatus(EXTI_Line11) != RESET)
{
// Random code
EXTI_ClearITPendingBit(EXTI_Line11);
}
}
void EXTI12_IRQnHandler(void)
{
if (EXTI_GetITStatus(EXTI_Line12) != RESET)
{
// Random code
EXTI_ClearITPendingBit(EXTI_Line12);
}
}
void EXTI13_IRQnHandler(void)
{
if (EXTI_GetITStatus(EXTI_Line13) != RESET)
{
// Random code
EXTI_ClearITPendingBit(EXTI_Line13);
}
}
But obviously didn't work.
I would love if someone could help me with this.
Thanks since now!
#stm32vldiscovery #stm32vl
