EXTI Interrupt : how do i know which port has triggerd the ISR?

[kay]

Posted on August 26, 2008 at 10:21

EXTI Interrupt : how do i know which port has triggerd the ISR?

[kay]

Posted on May 17, 2011 at 12:42

How can i distinguish the source of an interrupt-request for e.g. EXTI0 (PA0, PB0..) in the ISR?

[tibo]

Posted on May 17, 2011 at 12:42

on one EXTI-line you can use only one source, it is

selected with the register AFIO_EXTICRx (see http://www.st.com/mcu/forums-cat-7068-23.html). If you use more then one line in the isr (eg. IRQ EXTI9-5) you can use more then one source and you can distinguish the source in the pending register EXTI_PR.