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#41

A64 / Use USB OTG in host mode

Last post by frm - November 25, 2025, 12:51:07 PM

Hi,
Can I change the configuration of the microUSB OTG in my OLinuxino A64 to use it in "host mode" instead of "pheripheral mode" ?

I only found this post https://www.olimex.com/forum/index.php?topic=4990.0 which mentions a FEX file somewhere... and it's dated 2016

Thanks

#42

A64 / Re: eth0 disappears

Last post by frm - November 25, 2025, 12:38:37 PM

> 1. What is the state of the PHYRST1 PTH jumper? Is it closed or open? You also need to open that jumper in conjunction with running the script.

It's open


> 2. What exactly is the name and variant of the A64 board that you got (as printed on the box)? So I can test it myself.

This is an A64-Olinuxino-1G board, PN 88575


Thanks!

#43

A20 / Re: A20-OLinuXino-MICRO ILITEK...

Last post by Globici - November 24, 2025, 02:13:00 PM

The display is dem800480a tmh-pw-n (c-touch) / G ; 20190723 0047

#44

A20 / Re: A20-OLinuXino-MICRO ILITEK...

Last post by Globici - November 24, 2025, 01:37:51 PM

We haven't had issue like this with the displays we support and it is hard to give you directions aside that it is likely fixable by software means (whether it is inverted in the dts, or uncalibrated, or something in the touch conf has to be edited, etc). But it is important to clarify this: Is this double-tap or single tap? How the cursor goes to under your finger if this happens in single tap?

Currently when I place my finger on the screen to cursor goes to the edge of the screen and when I lift the finger the cursor goes where my finger was.

I tried various settings on `/etc/X11/xorg.conf.d/99-calibration.conf`, various xinput settings, but nothing fixed the issue.
The board had Android 4.2.2 on it with functional touchscreen but we need linux for the new app.

#45

A20 / Re: A20-OLinuXino-MICRO ILITEK...

Last post by LubOlimex - November 24, 2025, 11:56:02 AM

We haven't had issue like this with the displays we support and it is hard to give you directions aside that it is likely fixable by software means (whether it is inverted in the dts, or uncalibrated, or something in the touch conf has to be edited, etc). But it is important to clarify this: Is this double-tap or single tap? How the cursor goes to under your finger if this happens in single tap?

#46

ARDUINO / Re: Discharged batteries JA-80...

Last post by LubOlimex - November 24, 2025, 10:14:52 AM

They need more time. Leave them connected for 24h and check again. If the voltage stays 0.1V after 24h of charging they are probably very dead.

#47

ESP32 / Re: Very weird blown capacitor...

Last post by LubOlimex - November 24, 2025, 09:59:29 AM

Thanks for the feedback. We always improve on our designs, they are not set in stone, sadly we can't emulate scenarios and all problems here - sometimes we need customer feedback before we can spot a potential issue. We will bring some changes to the hardware design that should further reduce the chances of such a capacitor pop in the next hardware revision of ESP32-POE-ISO, e.g. hardware revision N.

#48

A64 / Re: eth0 disappears

Last post by LubOlimex - November 24, 2025, 08:38:54 AM

1. What is the state of the PHYRST1 PTH jumper? Is it closed or open? You also need to open that jumper in conjunction with running the script.

2. What exactly is the name and variant of the A64 board that you got (as printed on the box)? So I can test it myself.

#49

ESP32 / Re: Very weird blown capacitor...

Last post by slacks33 - November 24, 2025, 06:03:45 AM

Oh well, that is quite interesting. Thanks for the feedback. First time see something like this and we've manufactured quite a few of these boards. These are 4-layer boards heat dissipation should be quite good. A lot of customers used it in harsh conditions and never reported such a problem, it is either they didn't report it or something in your design is harsher. Good news is that revision B is quite old revision. Currently manufactured boards would behave quite differently since that part of the board was redesigned with different DC-DC. I would suggest latest revision of the board would be better for heat dissipation.

Hey there, don't mean to necropost, but I ran across this thread having the exact same issue on a ESP32-POE-ISO-EA-IND.

Bought this board in January of 2024, it has been running in a climate controlled room since shortly after that date. It has been largely untouched since then, I pulled it out to put it in a new 3D Printed case, just to find this:


This is Revision L, so I'm surprised that this is still happening. Reached out to support a few minutes ago, just wanted to also add to my findings here. Hoping this can get resolved, spent the extra money on the IND version to ensure I would have great longevity with this product.

#50

A20 / Re: A20-OLinuXino-MICRO ILITEK...

Last post by Globici - November 23, 2025, 04:58:00 PM

I've recompiled the kernel and managed to get it working with :

Code Select Expand

/dts-v1/;
/plugin/;

/ {
        compatible = "allwinner,sun7i-a20";

        fragment@0 {
                target = <&i2c0>;
                __overlay__ {
                        #address-cells = <1>;
                        #size-cells = <0>;
                        status = "okay";

                        ili210x@41 {
                                compatible = "ilitek,ili210x";
                                reg = <0x41>;
                                touchscreen-size-x = <0x320>;
                                touchscreen-size-y = <0x1e0>;
                                interrupt-parent = <&pio>;
                                interrupts = <8 14 2>; /* PI14, IRQ_TYPE_EDGE_FALLING */
                                reset-gpios = <&pio 4 2 1>; /* PE2, GPIO_ACTIVE_LOW */
                                touchscreen-swapped-x-y;
                                touchscreen-inverted-y;
                                wakeup-source;
                        };
                };
        };
};

but the TAP does not work (well, it works but if I place my finger in the middle of the screen the cursor is moved under my finger but the TAP is happening on the bottom of the screen ... idk why).