Pin Change Interrupts in Arduino Nano

Pins D4, D13 and A5 on the Nano are reprogrammed to accept hardware interrupts.
Link to code:
akuzechie.blogspot.com/2020/1...
Contents:
0:00 Introduction
0:28 Arduino Nano PCI Pins
2:00 Programming PCI Registers
3:41 Circuit Description
4:16 Demonstration
5:09 C++ Sketch
5:51 Conclusion

[@G-Code_official]

I just don't like the fact that you have only few subscribers. With your style of explanation, even professionals could learn from you....thank you very much. I hope to see more people learn from you.

[@AnasKuzechie]

Thanks for your kind words

[@isnainiahmadi1411]

This is the best explanation about Pin Change Interrupts in Arduino!
I've searched many articles about Pin Change Interrupts but only this video that makes me understand.
Thank you very much Anas. You deserve more likes!

[@AnasKuzechie]

Thanks for your feedback

[@BaronRosenhein]

Anas your videos are awesome. I finally understood that pin change interrupts are the same as assignable hardware interrupts. Thank you for taking the time to show registers, reference datasheets and explain what all these abbreviations mean. And last but not least simple code examples that are very easy to follow.

[@AnasKuzechie]

Thanks, I appreciate your feedback.

[@FreddyBNL]

Very good explanation and well illustrated with your setup.

[@AnasKuzechie]

Thanks

[@lyrixs4u]

Wow! This is very informative. Thank you!

[@AnasKuzechie]

Thanks for your feedback

[@user-tn8ps8ww1i]

Very good explanation
💙💙

[@AnasKuzechie]

Thank you

[@fpgamachine]

Excellent info, very clear. Thanks!

[@AnasKuzechie]

Thanks for your feedback.

[@jorgepamies-teixeira5998]

This is the best explanation I ever found! Thank you.
From this explanation I understood that only 3 interrupts can be set each one related to each PCMSK#. Is that so?

[@metronom_81]

great sir

[@AnasKuzechie]

Thanks

[@salahyoucefa8821]

I have a problem
when I use interrupt with a program that quantifies the delay function, the interrupt does not work
but when I eliminate the delay function, the interrupt works correctly

[@salahyoucefa8821]

j'ai un probleme
quand j'utlise interruption ;avec un programme qui quantient la fonction delay ,l'interuption ne fonctionne pas
mais quand j'limine la fonction delay ,l'interruption fonctionne correctement
quelle la solution et Merci

[@Schroeder9999]

Do we not need to set the I-bit in the SREG register to high before any interrupt is enabled? Similarly I didn't see the I-bit in SREG set back to high after each execution of the interrupt subroutines. It was mentioned in the ATMEGA328 manual that the I-bit will be reset back to low by hardware after an interrupt has ocurred

[@coolcolumbus]

Love your videos, please put us a tutorial on atmega mcu programming with c or c++.... will really be grateful!!!

[@AnasKuzechie]

Thanks for your feedback

[@sankalpakr5368]

Hi sir,
The video is so clear to configure pin change interrupts belonging to different ports.
Could you please let me know how to configure pin change interrupts belonging to same port?

[@pruthvirajg.k1965]

How do we configure Pin change interrupt assigned to a Pin which is set as output ? The datasheet claims the uC supports this but havent been able to do the same.

[@a330turbinex7]

Is it possible to use 3 interrupts for PWM inputs?

[@waterfallphd8040]

What happen if 2 interupt triger the same time

[@NikhilSehgal21]

Video is very informative. The only thing I didn't understand that inside ISR function the parameter is given ISR(PCINT0_vect), ISR(PCINT1_vect), ISR(PCINT2_vect), From where PCINT0,1 and 2 comes.
As per datasheet we should be using PCINT20, PCINT5 and PCINT13 for pin D4,D13 and A5 respectively.
Please help me to understand how PCINT0,1 and 2 comes instead PCINT20,5 and13. Thanks in advance.

[@NikhilSehgal21]

Please reply I need to use interrupt urgently.

[@AnasKuzechie]

Hi. ATmega328 has 3 registers related to PCI, namely, PCMSK0, PCMSK1 & PCMSK2. Within theses registers PCINT0 to PCINT23 are allocated. Also, associated with each mask register is one ISR. So for example any pin change interrupt is enabled within PCMSK0 will invoke ISR(PCINT0_vect). I hope this clarifies, and I apologize for my late reply.

[@G-Code_official]

Hi, In the code I have seen that you didn't define A5 as input. Is it not required?

[@AnasKuzechie]

Hi. No need since A5 is by default analog input.

[@gokulkrish7256]

Hi Anas, this is Gokul.I would need you to guide me. Im building my own flight controller but the thing is I need to know which programming language would be better serving me to unlock the full capabilities of the microcontroller if I learn it. As of now I'm using C++.

[@AnasKuzechie]

A combination of C++ and assembly. You can check out my series on programming Atmel controllers via assembly. Good luck with your project.

[@gokulkrish7256]

@@AnasKuzechie Thank you so much. Sure I'll do that... Sir.

[@AkashManish]

can we use nano every instead
?

[@AnasKuzechie]

Nano Every uses ATMega 4809, and it does support PCI. You need to check datasheet.

[@dreamlessfull]

Is there a way to make the ISR respond to falling/raising edges of the triggering signal?. Or should that be managed via software? Thank you for your video.