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ESP-32C3 Gpio 11,12,13
Posted: 10 Dec 2024, 05:21
by Alex P
On the board LuatOS with ESP32C3 available Gpio 11,12,13.
In the choice Hardware Settings They are not available in the selection.
Re: ESP-32C3 Gpio 11,12,13
Posted: 10 Dec 2024, 08:25
by Ath
According to
this documentation, these pins should not be used (in use for Flash), and to protect the innocent they aren't made available.
Re: ESP-32C3 Gpio 11,12,13
Posted: 10 Dec 2024, 08:42
by TD-er
Do you have a link to that board and/or a photo of the pins being exposed?
And can you also show what is shown on the sysinfo page regarding the detected ESP chip and flash?
GPIO-11 could maybe be exposed, if the flash is not embedded.
I have to check the datasheet to see when GPIO-12 and -13 might be available to know if you can safely use those.
N.B. on most ESP32-C3 boards, you should not have anything connected to GPIO-11 during boot as it sets the flash voltage and thus can damage the flash chip if set to the wrong level at boot.
Re: ESP-32C3 Gpio 11,12,13
Posted: 10 Dec 2024, 08:57
by Alex P
LuatOS_CORE-ESP32-C3-A12.zip
Luatos-ESP32-C3-MCU-Board-PRODUCT.jpg
Re: ESP-32C3 Gpio 11,12,13
Posted: 10 Dec 2024, 09:16
by TD-er
Ahd how is the flash reported on the sysinfo page?
Is it marked as "external flash" (or at least not marked as "embedded flash") ?
Re: ESP-32C3 Gpio 11,12,13
Posted: 10 Dec 2024, 10:01
by Alex P
Re: ESP-32C3 Gpio 11,12,13
Posted: 10 Dec 2024, 10:25
by TD-er
OK, so it is not marked as embedded flash.
I think I can add those pads to the selection, if no embedded flash is present, but with a warning (maybe even double warning...)
Re: ESP-32C3 Gpio 11,12,13
Posted: 10 Dec 2024, 10:31
by Alex P
Will this not affect chips with built-in flash?
Re: ESP-32C3 Gpio 11,12,13
Posted: 10 Dec 2024, 11:02
by TD-er