pin change interrupts

[theduskin]

I don't mention INT0 in the Readme because INT0 is not used in any way by picoUART. I'll think about how I can describe the way pin change interrupts are used without making it confusing for users of the library that are not intending to modify the source code.

Originally posted by @nerdralph in #1 (comment)

this is exactly what I'm looking/waiting for.
not that urgent at the moment, just to let you know there's at least one interested.

[nerdralph]

I decided that code comments are the best place to document internal implementation details. For example: https://github.com/nerdralph/picoUART/blob/master/src/rxISR.cpp#L14

…

On Thu, Feb 4, 2021, 03:19 theduskin ***@***.***> wrote: I don't mention INT0 in the Readme because INT0 is not used in any way by picoUART. I'll think about how I can describe the way pin change interrupts are used without making it confusing for users of the library that are not intending to modify the source code. If you look at the source you'll see it uses the PCINT0 interrupt, and assumes it is associated with PORTB (like on the t13 and t85). The t84, which uses PORTA for pin-change interrupts, is not currently supported. *Originally posted by @nerdralph <https://github.com/nerdralph> in #1 (comment) <#1 (comment)>* — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#7>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABKNZ6QWP47XJH4WL2Z35Q3S5JDA3ANCNFSM4XCJJDCA> .

[theduskin]

yes, thank you. i've read that, (not understanding ;) )
i've done the following, what makes it build without errors.
communication works a little, means something happen sometimes.
renaming the ISR (and added to picoUART.h to make it visible):
ISR(PCINT0_vect, ISR_NAKED)`

to

void ISRR(void)

and attach it to the PinChangeInterrupt lib this way:
attachPCINT(4, ISRR, CHANGE);

iv'e also changed PinChangeInterrupt's ISR(PCINT0_vect)to ISR(PCINT0_vect, ISR_NAKED)and added a reti(); at the end.

the word cycles occurs in your comments more than once.
makes me hope that there are some tuning is possible?
or is that a complete wrong way?

[nerdralph]

picoUART must have control over the pin change interrupt. Using a pin change library is a bad idea.