Alan Gauld <learn2prog...@gmail.com> wrote:
> On 31/08/2023 22:15, Chris Green via Python-list wrote:
>
> > class Gpiopin:
> >
> > def __init__(self, pin):
> > #
> > #
> > # scan through the GPIO chips to find the line/pin we want
> > #
> > for c in ['gpiochip0', 'gpiochip1', 'gpiochip2', 'gpiochip3']:
> >
> > chip = gpiod.Chip(c)
> > for l in range(32):
> > line = chip.get_line(l)
> > if pin in line.name():
> > print("Found: ", line.name())
> > return
> > else:
> > raise ValueError("Can't find pin '" + pin + "'")
>
> You don't store the line anywhere.
> You need to use self.line
> self.line = chip.get_line(l)
> if pin...
>
> > def print_name(self):
> > print (self.line.name())
> >
> > def set(self):
> > self.line.set_value(1)
> >
> > def clear(self):
> > self.line.set_value(0)
>
> As you do here.
>
Yes, OK, absolutely. However that wasn't my original rather basic
problem which was, as I said, that I wasn't running the code I was
looking at.
The above was just a quick hack from some even cruder code doing the
same job, trying to develop it into something better and more general.
It's all on a headless Beaglebone Black (bit like a Raspberry Pi) so
I'm doing everything via multiple ssh connections and sometimes this
results in "the left hand not knowing what the right hand is doing"!
--
Chris Green
ยท
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