In my case I don't have a DAC hat - no hats at all in fact. Testing so
far has been with a bare 3B+.
chill's Profile: http://forums.slimdevices.com/member.php?userid=10839
View this thread: http://forums.slimdevices.com/s
Yes, i2c uses gpio3, if you are using a DAC hat, most of those use i2c
to control the dac, and you cannot use GPIO3 for anything else.
piCorePlayer a small player for the Raspberry Pi in RAM.
Homepage: https://www.picoreplayer.org
Please 'donate'
(https://www.paypal.com/cgi-bin/webscr?cmd=_d
Interesting. I wonder if it's the hard-wired pull-up resistor that's
different then. Or the fact that I2C uses GPIO3.
Feeling a bit guilty about spamming this sbpd thread with this
discussion
chill's Profile: http:/
chill wrote:
> Wait... it doesn't seem reliable - sometimes works and sometimes
> doesn't. Coming back from a 'halt' (e.g. if I manually issue the 'sudo
> /sbin/poweroff' command in a terminal) seems reliable, but shutting down
> seems intermittent. Haven't spotted a pattern yet.
I'm surprise
Wait... it doesn't seem reliable - sometimes works and sometimes
doesn't. Coming back from a 'halt' (e.g. if I manually issue the 'sudo
/sbin/poweroff' command in a terminal) seems reliable, but shutting down
seems intermittent. Haven't spotted a pattern yet.
-
These settings seem to work for the gpio-shutdown overlay:
'[image:
http://www.cjh.me.uk/MyPhotobucket/cache/DIYHifi/RPi%20Board/Pi%20System/Shutdown%20settings_1024.jpg]'
(http://www.cjh.me.uk/MyPhotobucket/albums/DIYHifi/RPi%20Board/Pi%20System/Shutdown%20settings.jpg)
Grounding GPIO3 while t
Grounding GPIO3 apparently performs a 'wake from halt', so it seems
it'll only work if the Pi has been halted (e.g. by /sbin/poweroff?). I
think a toggle switch isn't such a good idea, but using a momentary
button to ground GPIO3, to either halt the system or wake it up again,
seems like the way
Reading more carefully, it seems like the button should be a momentary
button: "After shutdown, the system can be powered up again by driving
GPIO3 low."
So grounding the pin while pCP is running will call the
pcp-powerbutton.sh script, which issues the 'sudo /sbin/poweroff'
command. Grounding
paul- wrote:
> LMS is the problem..you need to halt the system first. You can
> build or buy power relays. To drop power after the kernel shuts down.
I've been trying to understand the foregoing discussion so that I can
shutdown my pCP LMS server(s) safely. I'd appreciate guidance on
whe
