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#21
ESP32 / Re: ESP32-POE-ISO Strapping pi...
Last post by LubOlimex - April 10, 2024, 08:42:09 AMGPIO15 is not a strapping pin.
GPIO0 is strapping pin and if pulled up at reset the board won't enter download mode. Meaning you can't reprogram the board. Notice that GPIO0 has internal pull up, not sure why you need external one.
Overall I would recommend NOT using GPIO0 but another GPI or GPIO pin instead. GPIO0 is a very special pin and I wouldn't recommend changing its pull ups or pull downs. Since you need input, I'd recommend one of the pins that are only inputs like GPI35 or GPI36.
You need to read the ESP32 datasheet and any notes about GPIO0 and GPIO15.
https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf
GPIO0 is strapping pin and if pulled up at reset the board won't enter download mode. Meaning you can't reprogram the board. Notice that GPIO0 has internal pull up, not sure why you need external one.
Overall I would recommend NOT using GPIO0 but another GPI or GPIO pin instead. GPIO0 is a very special pin and I wouldn't recommend changing its pull ups or pull downs. Since you need input, I'd recommend one of the pins that are only inputs like GPI35 or GPI36.
You need to read the ESP32 datasheet and any notes about GPIO0 and GPIO15.
https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf
#22
ESP32 / ESP32-POE-ISO Strapping pins
Last post by Cesarpuig - April 09, 2024, 09:02:07 PMHello.
On an ESP32-POE-ISO-EA-16MB board.
On the ESP32 GPIO0 and GPIO15 are strapping pins. Could I have problems if I install an external 10k pull up resistor in both of them? I want to use them as inputs through an optocoupler and I want to install external resistors.
Greetings and thank you
On an ESP32-POE-ISO-EA-16MB board.
On the ESP32 GPIO0 and GPIO15 are strapping pins. Could I have problems if I install an external 10k pull up resistor in both of them? I want to use them as inputs through an optocoupler and I want to install external resistors.
Greetings and thank you
#23
A20 / Re: Olimex A20-SOM interfacing...
Last post by LubOlimex - April 09, 2024, 08:58:15 AMWe use KSZ9031 in our designs, maybe look for the definitions for KSZ9031 in the Linux sources and adjust definitions and settings for your KSZ8563.
https://www.microchip.com/en-us/product-comparison.KSZ8563.ksz9031
Also check here:
https://microchip.my.site.com/s/article/An-Overview-of-Linux-Drivers-for-KSZ-Switch-Families
It says that you should use ksz9563 device tree for ksz8563.
https://www.microchip.com/en-us/product-comparison.KSZ8563.ksz9031
Also check here:
https://microchip.my.site.com/s/article/An-Overview-of-Linux-Drivers-for-KSZ-Switch-Families
It says that you should use ksz9563 device tree for ksz8563.
#24
A20 / Olimex A20-SOM interfacing KSZ...
Last post by mavstuff - April 08, 2024, 04:40:32 PMHi everybody!
Has anybody tried to connect Microchip KSZ8563 PHY to Olimex A20-SOM board? I am not able to get it to work.
Any information appreciated
Has anybody tried to connect Microchip KSZ8563 PHY to Olimex A20-SOM board? I am not able to get it to work.
Any information appreciated
#25
A20 / Re: Calibrate Touchscreen
Last post by vrendtop - April 08, 2024, 12:27:24 PMI forgot to mention that I use an A10 with an updated buster, because I didn't get an answer on the A10 forum ...
#26
ESP32 / Re: ESP32-EVB EN pin
Last post by olimex - April 05, 2024, 08:00:58 AMwhat is "inspired" did you copy completely or made modifications? hard to speculate what is wrong if no schematic
#27
ESP32 / ESP32-EVB EN pin
Last post by harryweb - April 04, 2024, 05:04:02 PMHI,
I made a PCB inspired with ESP32-EVB (I bought I version). Using LAN et some GPIO for SPI.
Power is made by USB connector.
When I upload my program with platformIO everything is OK on both cards, My program is booting and working (Original and mine).
If I just plug my power source (USB) it works fine on Olimex PCB but it doesn't boot on my PCB card.
I found a way to make it boot just short circuit (pulse) the EN to ground (There is no button on my card)
With the DSO I can see that EN pin is pulled low 100mSec at the end of uploading but not when only plugged to power... (On both cards).... many many hours without finding what's wrong... before making/adding a new pulse reset after powering with pic10f or 555 timer, I ask for some ideas to help me. regards
I made a PCB inspired with ESP32-EVB (I bought I version). Using LAN et some GPIO for SPI.
Power is made by USB connector.
When I upload my program with platformIO everything is OK on both cards, My program is booting and working (Original and mine).
If I just plug my power source (USB) it works fine on Olimex PCB but it doesn't boot on my PCB card.
I found a way to make it boot just short circuit (pulse) the EN to ground (There is no button on my card)
With the DSO I can see that EN pin is pulled low 100mSec at the end of uploading but not when only plugged to power... (On both cards).... many many hours without finding what's wrong... before making/adding a new pulse reset after powering with pic10f or 555 timer, I ask for some ideas to help me. regards
#28
A20 / Re: LIME2 Rev.L lock-up freeze...
Last post by LubOlimex - April 04, 2024, 08:23:35 AMDo you boot from the eMMC?
Can you check what is the revision of the stable board?
Is your Linux image based on Olimage?
How do you power the board and do you have a Li-Po battery?
Differences between revision K and latest L1 had been quite significant. Most notably the eMMC and the RAM are different, so it is probably something about support of those two in your image. You can check hardware changes here:
https://github.com/OLIMEX/OLINUXINO/blob/master/HARDWARE/A20-OLinuXino-LIME2/hardware_revision_changes_log.txt
Can you check what is the revision of the stable board?
Is your Linux image based on Olimage?
How do you power the board and do you have a Li-Po battery?
Differences between revision K and latest L1 had been quite significant. Most notably the eMMC and the RAM are different, so it is probably something about support of those two in your image. You can check hardware changes here:
https://github.com/OLIMEX/OLINUXINO/blob/master/HARDWARE/A20-OLinuXino-LIME2/hardware_revision_changes_log.txt
#29
ESP32 / Re: Help with Hardware
Last post by LubOlimex - April 04, 2024, 08:13:25 AMGPIO36 is not GPIO regarding the ESP32 board, it is only input hence the name in our documentation GPI36. So maybe swap 3 and 8.
#30
A20 / Re: LIME2 Rev.L lock-up freeze...
Last post by faraz - April 04, 2024, 07:12:09 AMSo, more people are facing the same issue. I am not alone.
What solved my problems partially, was I masked the reboot and shutdown commands.
I have good uptime on one site and issues on the other.
Not sure what revision board is on the site that's been up (uptime almost a year now). The site that's going off is using Rev L boards.
I am going to implement the scaling option suggested above and see if that helps. and also learn how I can configure a watchdog to reboot the system.
I am also logging current_now, voltage_now and Temperature_now values.
What solved my problems partially, was I masked the reboot and shutdown commands.
I have good uptime on one site and issues on the other.
Not sure what revision board is on the site that's been up (uptime almost a year now). The site that's going off is using Rev L boards.
I am going to implement the scaling option suggested above and see if that helps. and also learn how I can configure a watchdog to reboot the system.
I am also logging current_now, voltage_now and Temperature_now values.