Posted on May 17, 2011 at 14:22I found a very strange behaviour that lead to the EXTI problem:
I had the following routine
void EXTI15_10_IRQHandler(void)
{
EXTI_InitTypeDef EXTI_InitStructure;
if(EXTI_GetITStatus(EXTI_Line11) != RESET)
{
EXTI_InitStructure.EXTI_Line = EXTI_Line11;
EXTI_InitStructure.EXTI_LineCmd = DISABLE;
EXTI_Init(&EXTI_InitStructure);
/* Clear the EXTI Line 11 */
EXTI_ClearITPendingBit(EXTI_Line11);
}
}
with this code, sometimes the interrupts on LINE11 disabled also line 17 (alarm). If I change it to
void EXTI15_10_IRQHandler(void)
{
EXTI_InitTypeDef EXTI_InitStructure;
if(EXTI_GetITStatus(EXTI_Line11) != RESET)
{
// dispositivo sveglio, disabilito su rx di gsm
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_InitStructure.EXTI_Line = EXTI_Line11;
EXTI_InitStructure.EXTI_LineCmd = DISABLE;
EXTI_Init(&EXTI_InitStructure);
/* Clear the EXTI Line 11 */
EXTI_ClearITPendingBit(EXTI_Line11);
}
}
then the problem disappears! Is that a reason for it?
