maxmike wrote:
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> Thank you Dennis.
>
> I don't know if this is the right place to make a comment or express an
> opinion, but be that as it may
> I have to say t
Hello
i'd like to ask to questions related to serial communication.
1. Is there any reason why DMA is disabled by default in beagle bone black
serial_omap driver (CONFIG_SERIAL_8250_DMA=n) ?
Is it safe to recompile it with CONFIG_SERIAL_8250_DMA=y?
2. I encountered board freeze (most probab
I've build RT kernel 4.19 for my bbb and Debian buster.
Linux beaglebone 4.19.94+ #1 SMP PREEMPT RT Sun Apr 26 11:04:37 CEST 2020
armv7l GNU/Linux
I use wifi USB stick with kernel module mt760u and it works great.
After switching of USB power I'm flooded with messages:
[ 75.890362] mt7601u 1
Am Dienstag, 28. April 2020 23:56:34 UTC+2 schrieb
geral...@motorolasolutions.com:
>
> I was able to toggle those 2 lines as GPIO and validate their manipulation
> using a logic analyzer.
>
> When done, I went back to the other program to communicate with the micro
> SD card in the slot and it
> Without much longer belabouring the point, in my case gcc did not check
> my .h file; instead of checking it
for syntax (a semicolon missing in a function definition) it accepted it
and reported what the effect was of trusting it - totally incomprehensible
errors.
However, I have learned
Regarding your bus errors, I don't see anything in the TRM that
indicates the PRU shouldn't be able to talk to all of the GPIO banks.
I have, however, seen bus errors on uninitialized GPIO banks which come
up disabled by default. Check to make sure at least one GPIO pin is
exported by the Lin
Although a bit off track from the original subject, you may what to look at
some sort of lint tool to check you code for syntax errors. If you use an
editor such as Eclipse or Atom, this may do this for you already.
https://en.wikipedia.org/wiki/Lint_(software)
You could also look at the warning
On Wed, Apr 29, 2020 at 12:38 PM Charles Steinkuehler <
char...@steinkuehler.net> wrote:
> Regarding your bus errors, I don't see anything in the TRM that
> indicates the PRU shouldn't be able to talk to all of the GPIO banks.
>
> I have, however, seen bus errors on uninitialized GPIO banks which
Dear All,
I am having problem writing to a character 16 x 2 LCD with DMA enabled.
Please note that, the same character LCD works fine when DMA is not enabled.
I followed the sequence of:-
1. Enabling clocks in for LCD_CLKC_ENABLE for the clocks of DMA, LIDD &
Core clock. I write and read bac
That did it! I exported pin 8.43:
echo 226 > /sys/class/gpio/export
And now the PRUs can write to the set and clear addresses for GPIO8.
I also exported 8.26:
echo 124 > /sys/class/gpio/export
And now the PRUs can write to the set and clear addresses for GPIO4.
On Wed, Apr 29, 2020 at 11:42 A
This makes a whole lot more sense now, because I swear I had it working on
those GPIO ports at one point. I think I had exported pins manually while
testing things. Thanks for the help!
On Wed, Apr 29, 2020 at 2:59 PM John Allwine wrote:
> That did it! I exported pin 8.43:
>
> echo 226 > /sys/cl
Hi,
I've build RT kernel 4.19-rt for my BBB and Debian Buster.
Linux beaglebone 4.19.94+ #1 SMP PREEMPT RT Sun Apr 26 11:04:37 CEST 2020
armv7l GNU/Linux
I use wifi USB stick with kernel module mt760u and it works great.
However after switching-off USB power and switching to battery LiPo power
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