Recent posts

#11

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

Last post by Globici - November 25, 2025, 07:05:53 PM

OK, I've managed to get the driver up to date on kernel 5.10.80.

The DTS

Code Select Expand

/dts-v1/;
/plugin/;

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

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

            ili2120: touchscreen@41 {
                compatible = "ilitek,ili2120";
                reg = <0x41>;

                /* Touchscreen resolution */
                touchscreen-size-x = <800>;
                touchscreen-size-y = <480>;

                /* INT = PI14 → port I = 8, pin 14 */
                interrupt-parent = <&pio>;
                interrupts = <8 14 2>;   /* 2 = IRQ_TYPE_EDGE_FALLING */

                /* RST = PE2 → port E = 4, pin 2 */
                reset-gpios = <&pio 4 2 1>;  /* 1 = GPIO_ACTIVE_LOW */

                wakeup-source;

                /* uncomment if needed depending on orientation */
                // touchscreen-swapped-x-y;
                // touchscreen-inverted-x;
                // touchscreen-inverted-y;
            };
        };
    };
};
On the chip it is printed ILITEK 2117 but 2117 throws CRC-failed.

#12

New Products release / Three Chirstmas theme solderin...

Last post by olimex - November 25, 2025, 05:01:48 PM

Three Christmas Soldering kits to teach your kids electronics and soldering during the Christmas/New Year Holidays https://olimex.wordpress.com/2025/11/25/christmas-is-approaching-three-soldering-kits-to-teach-your-kid-soldering-during-the-season-holidays/ #soldering #kit #electronics

#13

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

#14

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!

#15

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

#16

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.

#17

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?

#18

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.

#19

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.

#20

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.