On Sun, Feb 28, 2021 at 8:08 am, Greg Gallagher <g...@embeddedgreg.com>
wrote:
On Sun, Feb 28, 2021 at 7:18 AM Gabriel Dinse via Xenomai
<xenomai@xenomai.org <mailto:xenomai@xenomai.org>> wrote:
Hello,
I currently have a loop rt_task for reading interrupts on a GPIO
pin of
my raspberry pi.
I'm using:
ret = read(pin, &value, sizeof(value));
but I don't want it to block forever, because my task should exit
when
there are not more interrupts to read. Can I use "select" for
introducing a reading timeout on my loop and yet being "real-time"?
Thank you,
Gabriel Dinse
If you are using the posix skin ( which I believe you are) then yes,
using select will translate into using the RT version of select, and
you can use a timeout.
Thanks
Greg
Should I specify posix on compilation? I'm using alchemy as well right
now. my Makefile is like this:
0 STAGE=../../output/target/
1 XENO_CONFIG := ../../output/target/usr/xenomai/bin/xeno-config
2 CFLAGS := $(shell DESTDIR=$(STAGE) $(XENO_CONFIG) --rtdm
--skin=alchemy -- cflags)
3 LDFLAGS := $(shell DESTDIR=$(STAGE) $(XENO_CONFIG) --rtdm
--skin=alchemy -- ldflags)
4 CC := $(shell DESTDIR=$(STAGE) $(XENO_CONFIG) --cc)
5
6 EXECUTABLE := program
7
8
9 all: $(EXECUTABLE)
10
11 %: %.c
12 $(CC) -o $@ $< $(CFLAGS) $(LDFLAGS)
