Recent posts

#1

A64 / Re: Use USB OTG in host mode

Last post by winfried - Today at 12:40:45 AM

First report:

- Measured that the USB-OTG Pin is set to GND with OTG cable and made the mouse test. So the OTG functionality seems to be broken.

Changed the devicetree:

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&usb_otg {
        dr_mode = "host"; /* set to host from otg */
        status = "okay";
};

Result:
3 seconds after boot mouse is detected and is powered  and after 33 second usb0-vbus is disabled and mouse is disconnected. So there is somewhere a timeout or the like.

Suspected the autosuspend, disabling, but still something in the system switches of the usb0-vbus, so disabled "USB Autosuspend" in Linux (Runtime Power Management).

in /boot/uEnv.txt put the line

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optargs=usbcore.autosuspend=-1but this did not help.

What also is suspect is that there is a

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/sys/devices/platform/usb1-vbusbut no

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/sys/devices/platform/usb1-vbus
So I stop for today, any hint is welcome

#2

A20 / Re: Wich board to correctly mo...

Last post by oly - October 14, 2026, 01:48:46 PM

Thank you for clarifications.

#3

A20 / Re: Wich board to correctly mo...

Last post by LubOlimex - October 14, 2026, 08:25:56 AM

Yes. This is expected behavior. The T2/A20 Boot ROM cannot boot directly from SATA. Its supported boot sources are SD/MMC, NAND, SPI NOR, and USB/FEL—SATA is absent. So you need a middle storage medium for the u-boot (SD/MMC, NAND, SPI NOR, and USB/FEL—SATA) between the main chip T2/A20 BROM and the SATA hard-disk.

Boards without 16MB SPI flash aka "-s16M" can't boot directly into the hard disk without the help of additional storage (either SD card or SPI flash). The U-Boot is too big to be stored on the EEPROM!

So options are - get "s16M" variant, or use SD card only for the U-Boot. USB/FEL—SATA doesn't appear like viable option since this requires another computer running sunxi-fel uploading the U-Boot on every cold boot. Same for NAND, NAND is not supported by mainline, and if you use eMMC an extra step through the EEPROM is needed, and our software doesn't support that option.

#4

A64 / Re: Use USB OTG in host mode

Last post by winfried - October 14, 2026, 12:20:27 AM

Since also need this for my A64 Rev.E , to connect a keyboard on the mini USB-OTG, USB-A already used by another device:

You'd have to edit dts/dtb. Refer to the Olimage guide, there is info on how to change dts/dtb or kernel:

Installed the crosscompiler and can make dtb. So what I have to edit ?

found in arch/arm64/boot/dts/allwinner/sun50i-a64-olinuxino-1G.dts

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&usb_otg {
        dr_mode = "otg";
        status = "okay";
};

I cannot figure out what to change, or what mode to define and where to find the documentation for this.

Any hint ?

mfg winfried

#5

A20 / Wich board to correctly move O...

Last post by oly - October 12, 2026, 02:24:18 PM

Hello,

Five years ago, I bought a LIME2 SERVER package (no more available) with

- 1 A20-OLinuXino-LIME2
- 1 metal box for it
- 1 metal case for SATA HDD
- 1 shield to connect HDD to OlinuXino, linking the box to the case
- 1 power supply


Nowdays, your product line offers many references for A20-OLinuXino-LIME2 with different options.
I've just bought a T2-OLinuXino-LIME2-IND and tryed to use your tool 'olinuxino-sd-to-sata'.
Doing so, I discover that without SPI flashmemory, I need to keep the SD card pluged inside the board so that the system can boot from HDD.
This is not what I want ...

Should I buy the T2-OLinuXino-LIME2-s16M-IND  version in order to use it only from    an SATA HDD (without SD card) ?

#6

A20 / Re: Persistent keymap doesn't ...

Last post by oly - October 11, 2026, 06:27:02 PM

Please then try:

sudo setupcon --save-only
sudo systemctl restart keyboard-setup.service

This works !.

Thank you 

#7

Neo6502 / Prophet server for the Neo6502...

Last post by béné - October 11, 2026, 12:51:13 AM

Hi all,

My Prophet server for the Neo6502 is online: https://prophet.3617.fr

It works with bocianu's prophet.neo client:

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set server prophet.3617.fr
set port 8998
You can also browse the catalogue in a web browser and play most programs there. Wolfenstein 3D (beta) is available too.

Feedback welcome!

béné

#8

TERES DIY Laptop / Re: Every Distro/Image has ano...

Last post by yang - October 10, 2026, 03:40:24 AM

I got Debian 13 trixie on mine. The rootfs is on the SD card, and I forgot how I installed it. Probably I did upgrade from bookworm image to trixie at some point. I also have LVM + LUKS set up at boot.

#9

New Products release / OpenFest 2026

Last post by olimex - October 09, 2026, 02:41:49 PM

OpenFest 2026 is approaching, be ready for the traditional Soldering workshop!
https://olimex.wordpress.com/2026/10/09/open-fest-2026-is-november-7-and-8-in-interpred-wtc-sofia/ #openfest #openfest2026 #soldering #workshop

#10

ESP32 / Re: Demo Code for ESP32-P4-Dev...

Last post by LubOlimex - October 09, 2026, 08:25:30 AM

ESP32-P4-DevKit seems to be in stock at Digikey USA. You can also purchase it directly form our web-shop, we ship to the US.