On Sun, Feb 19, 2023 at 1:13 PM Nathan Hartman wrote:
> Rather than use the default GPIO driver, I would probably consider a custom
> driver that doesn't present to applications as individual GPIO pins, but
> rather as higher level constructs (motor off, star-left, star-right, etc),
> with mappings
On Mon, Feb 20, 2023 at 7:21 AM Simon Filgis wrote:
>
> Not to forget to consider the time between reset and first init. Default
> pin state mostly is input floating, or input weak pull-up.
>
> Don't let big bang happen that early.
Yup, that was my concern number one: unknown state on power-on ->
Hi,
In my devices I always have external pull-up/downs at important/dangerouse
ports.
-Oleksandr
пн, 20 лют. 2023, 14:53 користувач Tomek CEDRO пише:
> On Mon, Feb 20, 2023 at 7:21 AM Simon Filgis wrote:
> >
> > Not to forget to consider the time between reset and first init. Default
> > pin s
On Mon, Feb 20, 2023 at 2:52 PM Tomek CEDRO wrote:
> In a more complex design I think that dedicated logic is required
> between mcu and the acuators that would verify working state with some
> sort of latching that prevents accidental fires :-)
In addition to machine-state-awareness, even safer t
Hi Tomek,
1s keepalive can also be addressed with sw-watchdog. It may be easier than
flipflopping.
--
Hard- and Softwaredevelopment Consultant
Ingenieurbüro-Filgis
USt-IdNr.: DE305343278
On Mon, Feb 20, 2023 at 3:08 PM Tomek CEDRO wrote:
> On Mon, Feb 20, 2023 at 2:52 PM Tomek CEDRO wrote:
>
On Mon, Feb 20, 2023 at 3:12 PM Simon Filgis wrote:
> 1s keepalive can also be addressed with sw-watchdog. It may be easier than
> flipflopping.
Thanks Simon! I was also thinking about custom NuttX driver as Nathan
suggested.. I need to see how complex is that.. always want to learn
new stuff.. I
Hi Tomek,
I mean MCU peripheral watchdog just for clarification. Not a sw-watchdog
flow control. But is that available in the nuttx codebase btw?
:)
--
Hard- and Softwaredevelopment Consultant
Ingenieurbüro-Filgis
USt-IdNr.: DE305343278
On Mon, Feb 20, 2023 at 3:24 PM Tomek CEDRO wrote:
> On M
One thing to be careful with hardware watchdogs: Most have a cyclic
behavior, so if your MCU locks up, the hardware watchdog might output
a square wave that causes motor to turn on, off, on, off, rapidly,
instead of killing it.
On Mon, Feb 20, 2023 at 9:44 AM Simon Filgis
wrote:
>
> Hi Tomek,
> I
On Mon, Feb 20, 2023 at 3:47 PM Nathan Hartman wrote:
> One thing to be careful with hardware watchdogs: Most have a cyclic
> behavior, so if your MCU locks up, the hardware watchdog might output
> a square wave that causes motor to turn on, off, on, off, rapidly,
> instead of killing it.
ACK! :-)
