STM32F100 Interrupt pins

431613 · ‎2015-06-08

Posted on June 09, 2015 at 08:42

Hi there,

i think this is more or less a question of understanding the datasheet. There is written ''up to 80 fast I/O ports all mappable on 16 external interrupt vectors [...]''

So, im looking for a proper pin for an external interrupt. Does that mean, i can choose every GPIO, because i can map an interrupt and its ISR to this pin in particular, or are there special pins i should use as external interrupt pins?

Thanks a lot for helping!

Marc

#stm32 #interrupt #external #pin

Chris1 · ‎2015-06-10

Posted on June 10, 2015 at 20:55

You will find details of the connections between the GPIO pins and the external interrupt lines in the Reference Manual for the device you are using. Usually, PA0, PB0, PC0, etc. can be connected to EXTI0; PA1, PB1, PC1, ... can be connected to EXTI1, etc.

nesrine · ‎2015-06-11

Posted on June 11, 2015 at 11:02

Hi Marc,

In the reference manual related to your STM32 product, the section ''Interrupts and events'', the'' External interrupt/event line mapping'' paragraph you can found GPIOs connection with the external interrupt/event lines,

also to have more detail check the ''System configuration controller (SYSCFG)''section.

I hope that help

Syrine