'GPIO' was not declared in this scope ESP32

[4516N41]

`In file included from c:\Users\Documents\Arduino\libraries\MCUFRIEND_kbv\MCUFRIEND_kbv.cpp:38:
c:\Users\Documents\Arduino\libraries\MCUFRIEND_kbv\utility/mcufriend_shield.h: In function 'void write_8(uint16_t)':
c:\Users\Documents\Arduino\libraries\MCUFRIEND_kbv\utility/mcufriend_shield.h:1084:5: error: 'GPIO' was not declared in this scope
1084 | GPIO.out_w1tc = map_8(0xFF); //could define once as DMASK
| ^~~~
c:\Users\Documents\Arduino\libraries\MCUFRIEND_kbv\utility/mcufriend_shield.h: In function 'uint8_t read_8()':
c:\Users\Documents\Arduino\libraries\MCUFRIEND_kbv\utility/mcufriend_shield.h:1090:19: error: 'GPIO' was not declared in this scope
1090 | return map_32(GPIO.in);
| ^~~~

exit status 1`

I get this error after the "Arduino Release v3.0.1 based on ESP-IDF v5.1.4" update

[walid-76]

Hello.
iam facing also the same problem and i have the newest version of arduino, were u able to solve the problem ??

[cor053]

I have got exactly the same problem as well. GPIO doesn't seem to be defined.

In file included from /Users/Documents/Arduino/libraries/MCUFRIEND_kbv/MCUFRIEND_kbv.cpp:38:
/Users/Documents/Arduino/libraries/MCUFRIEND_kbv/utility/mcufriend_shield.h: In function 'void write_8(uint16_t)':
/Users/Documents/Arduino/libraries/MCUFRIEND_kbv/utility/mcufriend_shield.h:1084:5: error: 'GPIO' was not declared in this scope
1084 | GPIO.out_w1tc = map_8(0xFF); //could define once as DMASK
| ^~~~
/Users/Documents/Arduino/libraries/MCUFRIEND_kbv/utility/mcufriend_shield.h: In function 'uint8_t read_8()':
/Users/Documents/Arduino/libraries/MCUFRIEND_kbv/utility/mcufriend_shield.h:1090:19: error: 'GPIO' was not declared in this scope
1090 | return map_32(GPIO.in);
| ^~~~

exit status 1

Compilation error: exit status 1

[cor053]

I found this thread.
Bodmer/TFT_eSPI#2628
It claims to have solved the problem recently. But what I understand is that is not in any official release yet.
But read it for yourself.

Sorry my mistake, It has got nothing to do with MCUFRIEND_kbv.

[ErrorxF00F]

Followed the link @cor053 posted and implemented the addition of the include for hal/gpio_ll.h and it fixed my issue. In utility/mcufriend_shield.h after line 1025 I added the include, like as follows:

1024	//################################### ESP32 ##############################
1025	#elif defined(ESP32)       //regular UNO shield on TTGO D1 R32 (ESP32)
1026
1027	#include "hal/gpio_ll.h" // GPIO register functions
1028
1029	#define LCD_RD  2  //LED
1030	#define LCD_WR  4

[kekanath]

This above really worked. thanks for the FIX

[mediaMicha]

Hello, I have the same Problem. I use the WEMOS D1 R32 Bord with the ILI9486 Touch Display. I have two Errors, and the include of "#include "hal/gpio_ll.h" does not work.
The two error massages:
In file included from /Users/michaelhammel/Documents/Arduino/libraries/Riscduino_MCUFRIEND_kbv/Riscduino_MCUFRIEND_kbv.cpp:38:
/Users/michaelhammel/Documents/Arduino/libraries/Riscduino_MCUFRIEND_kbv/utility/mcufriend_shield.h: In function 'void write_8(uint16_t)':
/Users/michaelhammel/Documents/Arduino/libraries/Riscduino_MCUFRIEND_kbv/utility/mcufriend_shield.h:1089:5: error: 'GPIO' was not declared in this scope
1089 | GPIO.out_w1tc = map_8(0xFF); //could define once as DMASK
| ^~~~
/Users/michaelhammel/Documents/Arduino/libraries/Riscduino_MCUFRIEND_kbv/utility/mcufriend_shield.h: In function 'uint8_t read_8()':
/Users/michaelhammel/Documents/Arduino/libraries/Riscduino_MCUFRIEND_kbv/utility/mcufriend_shield.h:1095:19: error: 'GPIO' was not declared in this scope
1095 | return map_32(GPIO.in);

I will be very happy, when it's work again, with the new environment. With the old Version 1.x.x it's works fine. With Arduino V 2.3.2. it not work any longer.

Wish you all the best, and hop someone find a solution :D