Please give me advice about how to use NVIC

tohru-sagayama · ‎2015-11-06

Posted on November 06, 2015 at 12:55

Hello.

My colleague is in trouble about NVIC of STM32L053..

At the moment, he wants to use several external interrupts;

some of them are assigned to EXTI line 0, some others are assigned to EXTI line 1,

and the rest are assigned to EXTI line2.

According to him, EXTI line 0 doesn't work at all regardless edge trigger happens.

Also some interrupts of line 1 and line 2 don't work at all regardless edge triggger happnes as well.

Does he take care of setting register when he assigns several interrupt to the same vector ? If someone can offer a sample program to solve this issue, I appreciate it.

Regards

#n

Tesla DeLorean · ‎2015-11-06

Posted on November 06, 2015 at 14:13

Perhaps if you show some code it might be more apparent why it isn't working.

What board is being used, and are the pins free/available?

Is the SYSCFG peripheral enabled? What settings are written to the NVIC and EXTI? Can you read these registers back to confirm the settings, and those for the associated GPIO?

Tips, Buy me a coffee, or three.. PayPal Venmo
Up vote any posts that you find helpful, it shows what's working..