Posted on May 17, 2011 at 12:49I am trying to get both PA13 and PC13 to trigger rising edge interrupts to wake the system from a sleep state with two separate inputs. I have configured both channels, but only PC13 is triggering the interrupt.
I have other wake-triggering interrupts on other pins of Port A, and they work fine. The only one that isn't working is the one that shares the interrupt with Port C on pin 13.
My EXTI initialization code is as follows:
void EXTI_Configuration(void)
{
EXTI_InitTypeDef EXTI_InitStructure;
//IGNITION INPUT
/* Connect Ignition Button EXTI Line to Ignition Button GPIO Pin */
GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource13);
/* Configure Key Button EXTI Line to generate an interrupt on rising edge to wake up from standby */
EXTI_InitStructure.EXTI_Line = EXTI_Line13;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
if (AUXILIARY_KEYFOB_ENABLED)
{
/* Connect Keyfob Button EXTI Lines to Keyfob Button GPIO Pins */
GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource11 | GPIO_PinSource12 | GPIO_PinSource13 | GPIO_PinSource15);
//USB AUX 3 INPUT
/* Configure Keyfob Button EXTI Line to generate an interrupt on rising edge to wake up from standby */
EXTI_InitStructure.EXTI_Line = EXTI_Line11;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
//USB AUX 4 INPUT
/* Configure Keyfob Button EXTI Line to generate an interrupt on rising edge to wake up from standby */
EXTI_InitStructure.EXTI_Line = EXTI_Line12;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
//NEG AUX 2 INPUT
/* Configure Keyfob Button EXTI Line to generate an interrupt on rising edge to wake up from standby */
EXTI_InitStructure.EXTI_Line = EXTI_Line13;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
//NEG AUX 1 INPUT
/* Configure Keyfob Button EXTI Line to generate an interrupt on rising edge to wake up from standby */
EXTI_InitStructure.EXTI_Line = EXTI_Line15;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
}
}
