Re: Allwinner H3 or H5 SoC and IR TX

Hi,

Thanks for your reply.

I reached the same conclusion - kernel v4 and LIRC are not compatible on H3
processor.

Rather than regressing to kernel V3, we chose to change hardware, as we
were in proof-of-concept phase of the project.

We are now using Espressif's ESP32 in production.

Colin Manning.

Technical Director
I.T. Navigate Pty Ltd
www.itnavigate.com.au
Phone: 0412 384 242

On Sun, 30 Dec. 2018, 01:24 Benoît-Pierre DEMAINE <[email protected]
wrote:

> I had a similar issue; check here.
>
> https://sourceforge.net/p/lirc/mailman/message/36222764/
>
> I was on orange pi zero, I had troubles for both sending and receiving IR.
> In the end, I did everything manually. I still use the LIRC module, but
> decode /dev/lirc0 with scripts, and also use bitbanging for sending.
>
> Since you are using similar CPU (opi0 uses H2+ which is a H3 without
> graphics), your distribution probably has the same issue as mine. An
> armbian is an armbian.
>
> Also, note that there is a significant difference between kernels 3 and 4.
> I never had any trouble upgrading Raspberries,or using any kernel. But with
> armbian on Oranges, if a tuto is written for kernel 3, it won't work on
> kernel 4, and revese. I have the issue for all SPI devices, and a few other
> cases (1 wire and SPI LCD).
>
> So, whatever changed in the SPI between the kernels, it may also affect IR.
>
> LCDs work best with kernels 3, and poorly with 4.
>
> 1W works best with kernels 4, but all tutorials written before 2017 for
> kernels 3 are deprecated.
>
> Tutorials are easy to distinguish: if they say to edit armbianEnv.txt,
> they are for kernel 4; if they don't, 3.
>
> So, since you say you use kernel 4 ... my advice is ... reinstall an old
> image with kernel 3, and try again.
>
> My LIRC failures were on 4.14.18-sunxi, and it was before I understood
> that kernel version was critical. I have not tried to downgrade my IR
> machine to 3. And since my project is now stable, I am not going to spend
> any more time in this.
>
> But, you failed on 4.14.52, I failed on 4.14.18-sunxi ... a pattern is
> coming out.
>
> NB: I unsubscribed the ML.
>
> On 16/07/18 05:02, Colin Manning wrote:
>
> Hi All,
>
> I have been trying to get IR TX to work from my FriendlyArm NanoPi NEO Air
> (Allwinner H3) and NanoPi NEO 2 (Allwinner H5) for a month now.
>
> RX works fine.
>
> I have tried a real time kernel, and I have tried LIRC.
>
> irsend generates the following message:
>
> irsend: hardware does not support sending
>
> I have enabled the PWM GPIO in the kernel.
>
> When I try bit banging, even with the real time patch (Linux 4.14.52), the
> timing is not accurate enough. About 25% of the time I can get a signal
> sent that can be read by AnalysIR, and about 1% of the time, the signal is
> the signal I expected to send.
>
> Does anyone have suggestions on how I can make this work?
>
> Thanks,
>
> Colin.
>
>
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>
> --
>  >o_/ DEMAINE Benoît-Pierre (aka DoubleHP) http://benoit.demaine.info/
> If computing were an exact science, IT engineers would'nt have work \_o<
>
> "So all that's left, Is the proof that love's not only blind but deaf."
> (FAKE TALES OF SAN FRANCISCO, Arctic Monkeys)
>
>