On the ESP32-PICO-V3, the GPIO20 pin is brought out. When trying to use it in the NodeMCU, the message GPIO_PIN mask error appears. I found advice to modify the /sdk/esp-idf/components/soc/soc/esp32/gpio_periph.c file. I have replaced '0,'on the appropriate position with 'IO_MUX_GPIO20_REG,'....

. If you are actually using IDF version 4.4 [*], then this change was not needed . The relevant entry is already:Code: C / C++Log in, to see the code . Check how the macro is defined: SOC_GPIO_VALID_GPIO_MASK in /components/soc/esp32/include/soc/soc_caps.h. Should be:Code: C / C++Log in, to see the code . [*] The version tagged in github as 4.4-dev is a bit backwards compared to master and even the official 4.3 version.

I am using the master version. The advice solved the problem. Thank you very much.

Why do I get an error when trying to use GPIO20 in the NodeMCU?

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#1 19655513 14 Oct 2021 11:29

TvWidget TvWidget

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Post #1
19655513 14 Oct 2021 11:29

On the ESP32-PICO-V3, the GPIO20 pin is brought out.
When trying to use it in the NodeMCU, the message "GPIO_PIN mask error" appears.
I found advice to modify the /sdk/esp-idf/components/soc/soc/esp32/gpio_periph.c file.
I have replaced '0,'on the appropriate position with 'IO_MUX_GPIO20_REG,'. The error still appears. Does anyone have an idea what needs to be done to make it possible to use GPIO20 ?
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#2 19655564 14 Oct 2021 11:59

khoam khoam

Level 42

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Post #2
19655564 14 Oct 2021 11:59

TvWidget wrote:
I changed '0,'to 'IO_MUX_GPIO20_REG,' at the appropriate position.
.
If you are actually using IDF version 4.4 [*], then this change was not needed . The relevant entry is already:
Code: C / C++
Log in, to see the code
.

Check how the macro is defined: SOC_GPIO_VALID_GPIO_MASK in /components/soc/esp32/include/soc/soc_caps.h. Should be:
Code: C / C++
Log in, to see the code
.

[*] The version tagged in github as 4.4-dev is a bit "backwards" compared to master and even the official 4.3 version.
#3 19655601 14 Oct 2021 12:18

TvWidget TvWidget

Level 38

» | Topic author Helpful post? (0)

Post #3
19655601 14 Oct 2021 12:18

I am using the "master" version.
The advice solved the problem. Thank you very much.
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Why do I get an error when trying to use GPIO20 in the NodeMCU?

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