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#1
A20 / Re: Wich board to correctly mo...
Last post by LubOlimex - Today at 10:01:32 AMHm... I find that hard to believe since the A20 boot sequence tries the primary SD interface before SPI NOR.
Try re-running the olinuxino-sd-to-sata script, what does it say?
Try re-running the olinuxino-sd-to-sata script, what does it say?
#2
ESP32 / Re: ESP32-P4-PC: USB-JTAG inst...
Last post by LubOlimex - Today at 08:58:05 AMFirst it is worth testing with our code and see if the same thing exists with it. I specifically recommend testing with this demo that I published like two weeks ago (since it changes a lot of settings and timings around the HDMI):
https://github.com/OLIMEX/ESP32-P4-PC/tree/main/SOFTWARE/ESP-IDF/p4_board_demo
If you don't want to build it you can simply use the binary at 0x0. See if one or both the issues remain.
This hardware revision is pretty good it hugely improved start up issues that occurred with older hardware releases, due to different regulator and logic. Some boards from older hardware revisions had bigger issues especially when ESP32-P4 chip is erased. It is described somewhere in the forum (but for ESP32-P4-DevKit). So this is probably related to either the software or the way Linux handles DTR and RTS or there is silicon bug in the ESP32 chip itself, maybe check the errata sheet for ESP32-P4 v1.3 (the module your board uses), and specifically this issue:
https://docs.espressif.com/projects/esp-chip-errata/en/latest/esp32p4/03-errata-description/esp32p4/unauthorized-ahb-access-may-block-subsequent-psram-or-flash-transactions.html
If the issues remain with the code above, let me know how you test exactly (e.g. step by step) so I can reproduce and test it myself here.
https://github.com/OLIMEX/ESP32-P4-PC/tree/main/SOFTWARE/ESP-IDF/p4_board_demo
If you don't want to build it you can simply use the binary at 0x0. See if one or both the issues remain.
This hardware revision is pretty good it hugely improved start up issues that occurred with older hardware releases, due to different regulator and logic. Some boards from older hardware revisions had bigger issues especially when ESP32-P4 chip is erased. It is described somewhere in the forum (but for ESP32-P4-DevKit). So this is probably related to either the software or the way Linux handles DTR and RTS or there is silicon bug in the ESP32 chip itself, maybe check the errata sheet for ESP32-P4 v1.3 (the module your board uses), and specifically this issue:
https://docs.espressif.com/projects/esp-chip-errata/en/latest/esp32p4/03-errata-description/esp32p4/unauthorized-ahb-access-may-block-subsequent-psram-or-flash-transactions.html
If the issues remain with the code above, let me know how you test exactly (e.g. step by step) so I can reproduce and test it myself here.
#3
ESP32 / Re: ESP32-P4-PC: USB-JTAG inst...
Last post by Rochus - October 19, 2026, 04:44:18 PMAs noted, Rev. C. I bought them on 19.02.2026, order W-RK180226. What other information do you need?
#4
New Products release / BB-LVL-SHIFT and UEXT-LVL-SHIF...
Last post by olimex - October 19, 2026, 03:27:42 PMTwo new Open Source Hardware boards in stock BB-LVL-SHIFT and UEXT-LVL-SHIFT allow 3.3V targets to tlk to 1.65V-5.5V sensors and targets https://olimex.wordpress.com/2026/10/19/two-new-open-source-hardware-level-shifters-bb-lvl-shift-and-uext-lvl-shift/ #oshw #embedded #esp32 #stm32 #arduino #raspberryrpi #maker #olimex
#5
Neo6502 / Re: Problems Getting Started
Last post by LubOlimex - October 19, 2026, 09:04:22 AMDo you use the left side connector initially? Only switch to the connector at the back after successfully downloading the firmware.
#6
ESP32 / Re: ESP32-P4-PC: USB-JTAG inst...
Last post by LubOlimex - October 19, 2026, 08:59:41 AMWhat is the hardware revision of the board that you use?
#7
Neo6502 / Re: Problems Getting Started
Last post by AFM - October 18, 2026, 06:09:04 PMI also have problem to getting started. Just got a Neo6502kbd. Manual says I need to press the bootloader, turn on then release the bootloader. There is a red light at the hdmi which lights up, then nothing happens. No picture no reaction. Then I have to re-plug the type-c to be able to do this again. Charger is 20W, it charges my phone, also hdmi + monitor works with my laptop. I use the back type-c which is the power.
What do I do wrong?
Thank you.
What do I do wrong?
Thank you.
#8
A64 / Re: Use USB OTG in host mode
Last post by winfried - October 18, 2026, 12:24:36 AMThanks for the solution.
Since my A64 olinuxino REV.E is a a64-olinuxino-2Ge8G not a a64-olonuxino-1Ge8GW, I changed the script:
Exchanged all "1Ge8GW" with "2Ge8G".
It worked fine as described, after reboot reconnect the mouse it lights and get listed with lsusb.
Will do some further checks for now and report if stable and seeing forward to the kernel fix.
Since my A64 olinuxino REV.E is a a64-olinuxino-2Ge8G not a a64-olonuxino-1Ge8GW, I changed the script:
Exchanged all "1Ge8GW" with "2Ge8G".
It worked fine as described, after reboot reconnect the mouse it lights and get listed with lsusb.
Will do some further checks for now and report if stable and seeing forward to the kernel fix.
#9
ESP32 / ESP32-P4-PC: USB-JTAG instabil...
Last post by Rochus - October 17, 2026, 12:22:39 AMWhile tying to migrate the Oberon System 3 to the P4-PC board I have hit the following road blocks (not sure whether this is the right place for this or it was already reported elsewhere):
Rev.C, behaviour reproduced on two separate boards
Not using any of your software or drivers
# 1. USB Serial/JTAG interface drops and re-enumerates continuously
Only started after several flashes and tests
/dev/ttyACM* node then appears and disappears every few seconds for some time with stable phases (~10 minutes) in between
# 2. LT8912B I2C interface strange behaviour when HDMI is connected
The LT8912B is on GPIO7/SDA + GPIO8/SCL
Once a monitor is attached, the LT8912B cannot be (re)configured
If the monitor is attached/detached after a working init, the LT
often loses its HDMI transmitter state and the display stays blue until the LT is re-initialized
Rev.C, behaviour reproduced on two separate boards
Not using any of your software or drivers
# 1. USB Serial/JTAG interface drops and re-enumerates continuously
Only started after several flashes and tests
/dev/ttyACM* node then appears and disappears every few seconds for some time with stable phases (~10 minutes) in between
# 2. LT8912B I2C interface strange behaviour when HDMI is connected
The LT8912B is on GPIO7/SDA + GPIO8/SCL
Once a monitor is attached, the LT8912B cannot be (re)configured
If the monitor is attached/detached after a working init, the LT
often loses its HDMI transmitter state and the display stays blue until the LT is re-initialized
#10
Neo6502 / Re: Prophet server for the Neo...
Last post by Ralf - October 16, 2026, 07:18:57 PMDude!
Your Trinity Firmware is the hottest thing for the Neo6502 since the original Prophet-Server!
Two things I noticed:
- the Olimex UART WiFi Card seems not to be supported. Fair enough, you offer a viable alternative. However, I guess you might want to state that more clearly somewhere. First boot of Trinity with the UART Card inserted resulted in a myriad of error messages and lots of unwanted files suddenly appearing on my USB drive.
- how is the state of the keymap support? Can I change to a German keymap already?
I must confess, I was skeptical at first, but then I found that NeoBASIC is still provided, and Wolfenstein 3d is a marvel in itself!
Absolutely love the name, by the way: Trinity! So fitting for the whole project, very nice.
Great work!
Cheers
Your Trinity Firmware is the hottest thing for the Neo6502 since the original Prophet-Server!
Two things I noticed:
- the Olimex UART WiFi Card seems not to be supported. Fair enough, you offer a viable alternative. However, I guess you might want to state that more clearly somewhere. First boot of Trinity with the UART Card inserted resulted in a myriad of error messages and lots of unwanted files suddenly appearing on my USB drive.
- how is the state of the keymap support? Can I change to a German keymap already?
I must confess, I was skeptical at first, but then I found that NeoBASIC is still provided, and Wolfenstein 3d is a marvel in itself!
Absolutely love the name, by the way: Trinity! So fitting for the whole project, very nice.
Great work!
Cheers