Posted on January 25, 2013 at 03:51
Ok attempt number 4: In my final application I have to implement a external interrupt on PA14 of aSTM32F051K6 to wake from sleep. Using theNVIC WFI mode example on a STM32F0-Discovery board I implement the function but cant debug because of the SWCLK function that shares this pin. All well and good but in ''release build'' the EXTI interrupt doesn't seem to fire. Do I have to disable SWI somehow? Is this even possible?
I think the way to disable SWD is to reconfigure the GPIO's off the AF setting, presumably you're setting them up as inputs?
As a blind stab, it should probably look like this
void EXTI14_Config(void)
{
EXTI_InitTypeDef EXTI_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
/* Enable GPIOA clock */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
/* Configure PA14 pin as input floating */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Enable SYSCFG clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
/* Connect EXTI14 Line to PA14 pin */
SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOA, EXTI_PinSource14);
/* Configure EXTI14 line */
EXTI_InitStructure.EXTI_Line = EXTI_Line14;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
/* Enable and set EXTI14 Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = EXTI4_15_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority = 0x00;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void EXTI4_15_IRQHandler(void)
{
if(EXTI_GetITStatus(EXTI_Line14) != RESET)
{
/* Something Something */
/* Clear the EXTI line 14 pending bit */
EXTI_ClearITPendingBit(EXTI_Line14);
}
}
