Robert, Out of curiosity, does that require having the Relay overlay loaded or is that a default?
https://github.com/beagleboard/bb.org-overlays/blob/master/src/arm/BB-RELAY-4PORT-00A0.dts Cheers, Jon On Mon, Apr 6, 2020 at 8:23 PM Robert Nelson <[email protected]> wrote: > Your trying too hard.. > > > Turn Relay 2 on: > > echo 1 > /sys/class/leds/relay-jp2/brightness > > Turn Relay 2 off: > > echo 0 > /sys/class/leds/relay-jp2/brightness > > > Regards, > > > On Mon, Apr 6, 2020, 10:20 PM KenUnix <[email protected]> wrote: > >> Jon, >>> <https://groups.google.com/d/msgid/beagleboard/4f08bce6-61dc-4d9b-8471-b2fde68afcaf%40googlegroups.com?utm_medium=email&utm_source=footer> >> >> >> Yes Mala I.E. Seth have exchanged messages >> >> The 'c' I tried refuses to operate relays >> >> --Start code-- >> #include <fcntl.h> >> #include <unistd.h> >> #include <stdlib.h> >> #include <stdio.h> >> >> int main() >> { >> int fd = open( "/sys/class/gpio/gpio112/value", O_RDWR | O_CLOEXEC ); >> if( fd < 0 ) { >> fprintf( stderr, "open: %m\n" ); >> exit(1); >> } >> >> char c = '1'; >> write( fd, &c, 1 ); >> close( fd ); >> >> return 0; >> } >> --End Code-- >> >> No errors. Just dosen't do anything >> >> Ken >> >> -- >> For more options, visit http://beagleboard.org/discuss >> --- >> You received this message because you are subscribed to the Google Groups >> "BeagleBoard" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/beagleboard/f60cd784-df33-4d87-89ac-d79b7e5a43ef%40googlegroups.com >> <https://groups.google.com/d/msgid/beagleboard/f60cd784-df33-4d87-89ac-d79b7e5a43ef%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/CAOCHtYgE-R0JRksFsE1XVkcXmih1HJ6RyLinif2L-tUrs9dkpA%40mail.gmail.com > <https://groups.google.com/d/msgid/beagleboard/CAOCHtYgE-R0JRksFsE1XVkcXmih1HJ6RyLinif2L-tUrs9dkpA%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CAG99bkrSLfjeYB6m0L2BqfT4jkVbejAHxQa9F%3DjqhiZ83tgZuA%40mail.gmail.com.
