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Topic: GPIO interrupt code (Read 10122 times)
pascalbythree
Sr. Member
Posts: 256
GPIO interrupt code
«
on:
April 06, 2017, 12:22:34 pm »
Does anbode have Interrupt example code, to use for my GPIO Raspberry. To trigger some buttons. So u do not need a Timer.
Logged
bobihot
New Member
Posts: 36
Re: GPIO interrupt code
«
Reply #1 on:
April 06, 2017, 01:10:07 pm »
I so interested.
May be need to write a OS driver, or use them. And to assign a function to handle this?
Logged
Carlos Liñan
Newbie
Posts: 1
Re: GPIO interrupt code
«
Reply #2 on:
April 14, 2018, 01:13:00 pm »
I am interested in this matter, but I can not find information, can anyone show an example?
Me interesa este asunto, pero no encuentro informacion, alguien puede mostrar algún ejemplo?
Logged
Tz
Jr. Member
Posts: 54
Tz with FPC Pen Cil
Re: GPIO interrupt code
«
Reply #3 on:
September 02, 2019, 09:09:32 am »
if you are using linux try using epoll
Logged
avra
Hero Member
Posts: 2514
Re: GPIO interrupt code
«
Reply #4 on:
September 02, 2019, 10:11:41 am »
https://wiki.freepascal.org/Lazarus_on_Raspberry_Pi/de#Interrupt
https://github.com/SAmeis/pascalio/blob/master/examples/linux_interrupt/project1.lpr
https://github.com/SAmeis/pascalio/blob/master/gui-src/fpgpiocomp.pas
«
Last Edit: September 02, 2019, 10:16:47 am by avra
»
Logged
ct2laz
- Conversion between Lazarus and CodeTyphon
bithelpers
- Bit manipulation for standard types
pasettimino
- Siemens S7 PLC lib
Swirl
New Member
Posts: 24
Re: GPIO interrupt code
«
Reply #5 on:
April 30, 2020, 06:11:29 pm »
Maybe it's my misunderstanding but in the examples I always see a "waiting for interrupt".
In my understanding an interrupt is something you do not have to wait(loop) for. E.g. Like a TTimer event. I would like to have a procedure that is called without including a "polling loop".
Is there a way like NMIs I used on the good old Zilog Z80.
Code: Pascal
[Select]
[+]
[-]
InterruptProc
(
Sender
:
Foo
)
;
begin
dosomething
;
end
;
Please tell me how to do that or tell me that I am misunderstanding the examples.
Regards,
Mike
Update
As I read here...
https://www.raspberrypi.org/forums/viewtopic.php?t=9207
...a "real" Interrupt would be a part of the kernel and thus it's not available on the pi.
The best way to perform an "interrupt" is a thread. This will be adequate for me.
«
Last Edit: April 30, 2020, 07:19:25 pm by Swirl
»
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