ESP-32C3 Gpio 11,12,13

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Alex P
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ESP-32C3 Gpio 11,12,13

#1 Post by Alex P » 10 Dec 2024, 05:21

On the board LuatOS with ESP32C3 available Gpio 11,12,13.
In the choice Hardware Settings They are not available in the selection.
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Ath
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Re: ESP-32C3 Gpio 11,12,13

#2 Post by Ath » 10 Dec 2024, 08:25

According to this documentation, these pins should not be used (in use for Flash), and to protect the innocent they aren't made available.
/Ton (PayPal.me)
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TD-er
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Re: ESP-32C3 Gpio 11,12,13

#3 Post by TD-er » 10 Dec 2024, 08:42

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.
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Alex P
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Re: ESP-32C3 Gpio 11,12,13

#4 Post by Alex P » 10 Dec 2024, 08:57

LuatOS_CORE-ESP32-C3-A12.zip
Luatos-ESP32-C3-MCU-Board-PRODUCT.jpg
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TD-er
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Re: ESP-32C3 Gpio 11,12,13

#5 Post by TD-er » 10 Dec 2024, 09:16

Ahd how is the flash reported on the sysinfo page?
Is it marked as "external flash" (or at least not marked as "embedded flash") ?
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Alex P
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Re: ESP-32C3 Gpio 11,12,13

#6 Post by Alex P » 10 Dec 2024, 10:01

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TD-er
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Re: ESP-32C3 Gpio 11,12,13

#7 Post by TD-er » 10 Dec 2024, 10:25

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...)
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Re: ESP-32C3 Gpio 11,12,13

#8 Post by Alex P » 10 Dec 2024, 10:31

Will this not affect chips with built-in flash?
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Re: ESP-32C3 Gpio 11,12,13

#9 Post by TD-er » 10 Dec 2024, 11:02

I made a pull request which does take this embedded flash flag into account:
https://github.com/letscontrolit/ESPEasy/pull/5175

GitHub Actions build: https://github.com/letscontrolit/ESPEas ... 2253694421
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