mycnc
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Posts posted by mycnc
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On 4/3/2020 at 8:26 AM, martinayotte said:
This patch will add RS485 emulation ...
Hello, I need RS485 half-duplex too.
I applied the patch, but behaviour is the same. RTS goes down when transmition started ang goes up only when application closed.
Maybe I missed how to turn ON the emulation mode?
Any advice please
thanks
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34 minutes ago, Igor said:
Try to put this parameter to userpatches/lib.config
yes, this works. Now I'm able to play with the patches. Thank you for help.
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I run
./compile.sh KERNELBRANCH="tag:v5.4.28"
but looks like the option is ignored and 5.4.32 downloaded.
Any advice?
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the same about "current" version -
Armbian 5.4.32 and the latest RT patch 5.4.28
Please any advice how to rollback Armbian kernel?
Maybe some archive with 4.19.106 (or 5.4.28) kernel with Armbian patches?
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Thanks for reply.
I've done RT kernel 3 years ago, works fine for me,
but now found a bug with RTS/CTS for H3 uart and need to update.
I see the latest RT patches 4.19.106, but Armbian uses 4.19.115.
Is any way to roll back Armbian to 4.19.106 ?
I'm going to check "current" branch now.
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On 9/5/2019 at 1:47 AM, Igor said:
You can build one with Armbian build system + RT patches from here: https://rt.wiki.kernel.org/index.php/Main_Page
Hi there.
I remember there were "disabled" RT patch included. Did you remove it from the package?
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Hi, do you have any progress on Rock64?
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On 11/7/2017 at 1:02 AM, Igor said:
Have you try those perhaps:
Hi, thanks for the message.
I tried and have got -
sudo ./cyclictest -p 80 -t5 -n
# /dev/cpu_dma_latency set to 0us
policy: fifo: loadavg: 1.39 3.37 1.95 1/143 1871T: 0 ( 1857) P:80 I:1000 C: 5309 Min: 12 Act: 17 Avg: 59 Max: 1987
T: 1 ( 1858) P:80 I:1500 C: 3560 Min: 12 Act: 18 Avg: 67 Max: 2705
T: 2 ( 1859) P:80 I:2000 C: 2673 Min: 13 Act: 25 Avg: 75 Max: 3456
T: 3 ( 1860) P:80 I:2500 C: 2140 Min: 13 Act: 21 Avg: 68 Max: 2712
T: 4 ( 1861) P:80 I:3000 C: 1784 Min: 13 Act: 25 Avg: 78 Max: 2601About the same result for idle & heavy load.
For normal kernel I have Max=6-7ms while idle and up to 50ms while heavy loading.
So looks like RT path works, but works not really good and much worse than legacy kernel.
Any advice ? or wait next releases ?
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Hi,
i tested my application with mainline kernel and found RT mode does not work properly.
Looks like RT features are not enabled despite on correct "uname -a" output.
Right now i'm waiting next Armbian release in hope Armbian team have got solution.
Legacy kernel RT works fine, but SPI driver is not suitable for me.
Any advice very appreciated since i've passed deadline quite long ago
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Hi,
do you plan to add Desktop images for Rock64 ?
Anyway thanks for your great job. Armbian is wonderful!
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After I learned how to setup armbian script config - it's all done almost automatically.
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I've managed to patch armbian kernel. At first glance looks ok, need to do more tests. I haven't work with Linux RT before
Linux nanopineo 4.11.12-rt13-sun8i #5 SMP PREEMPT RT Sun Sep 10 20:19:58 CDT 2017 armv7l armv7l armv7l GNU/Linux
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Hi all,
i use SPI to connect Nanopi-Zero with FPGA on my board.
Mainline kernel SPI driver works much better for me, but I still have some critical lags in SPI communications.
Is RT patch available for mainline linux (i have 4.11.9-sun8i) ?
thank you.
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Hello,
i need to try RT Linux on Nano-Pi Zero asap.
What is current status ? Can I try ?
RTS signal and uart2 init
in Allwinner sunxi
Posted
Thanks for your help, I will give a try.