Just to make sure we're talking abou the same things: To disable MPM, you
run
systemctl stop usrp-hwd
You can also run
systemctl disable usrp-hwd
which does not stop MPM, but will avoid it being started on reboot.
It seems you know what you're doing, but for the record: when MPM is not
running, your USRP is a heavy piece of metal running Linux (at least, until
you've ported OpenCPI or some other custom software). That's why we have
designed MPM to keep running at all times, even when some kind of fatal
error occurred, so UHD can at least see some kind of device. We use systemd
watchdogs to reboot it when it's gone.
--M
On Wed, Oct 6, 2021 at 11:45 PM Marcus D. Leech <patchvonbr...@gmail.com>
wrote:
> On 2021-10-06 5:17 p.m., Tellrell White wrote:
>
>
> So, just to clarify, if its "required" is there no way of disabling it or
> removing??
>
> The project I'm working on is based on using the Open CPI framework, which
> is basically an opensource framework for developing and executing component
> based apps on embedded platforms. With that being said, my task isn't
> tightly bound to using UHD, therefore, I would like to disable or remove
> MPM for a custom application.
>
> After killing MPM, you can use "ps" to check to see if it has come back,
> and if it hasn't and "something else" still owns the I2C devices, you can
> use
> "lsof" to see which processes have which devices open. I think the i2C
> devices will manifest in the /dev filesystem. For example, on my *laptop*,
> there's:
>
> rw------- 1 root root 89, 0 Sep 28 18:14 /dev/i2c-0
> crw------- 1 root root 89, 1 Sep 28 18:14 /dev/i2c-1
> crw------- 1 root root 89, 2 Sep 28 18:14 /dev/i2c-2
> crw------- 1 root root 89, 3 Sep 28 18:14 /dev/i2c-3
> crw------- 1 root root 89, 4 Sep 28 18:14 /dev/i2c-4
> crw------- 1 root root 89, 5 Sep 28 18:14 /dev/i2c-5
>
>
>
>
>
>
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