Implicit Function Declaration

[M-Rizwan-Anwar]

Dear community members, I am using arduino as a component in VS Code, I am having issues in ESP32 Core header files. it is saying implicit declaration for some of the i2c functions:

D:/esp32/Test-Helloworld/hello_world/components/cores/esp32/esp32-hal-i2c-slave.c:517:5: error: implicit declaration of function 'i2c_ll_cal_bus_clk' [-Werror=implicit-function-declaration]
517 | i2c_ll_cal_bus_clk(APB_CLK_FREQ, clk_speed, &clk_cal);
| ^~~~~~~~~~~~~~~~~~
D:/esp32/Test-Helloworld/hello_world/components/cores/esp32/esp32-hal-i2c-slave.c:525:5: error: implicit declaration of function 'i2c_ll_set_bus_timing'; did you mean 'i2c_ll_set_scl_timing'? [-Werror=implicit-function-declaration]
525 | i2c_ll_set_bus_timing(i2c->dev, &clk_cal);
| ^~~~~~~~~~~~~~~~~~~~~
| i2c_ll_set_scl_timing
D:/esp32/Test-Helloworld/hello_world/components/cores/esp32/esp32-hal-i2c-slave.c:526:5: error: implicit declaration of function 'i2c_ll_set_filter'; did you mean 'i2c_ll_set_tout'? [-Werror=implicit-function-declaration]
526 | i2c_ll_set_filter(i2c->dev, 3);
| ^~~~~~~~~~~~~~~~~
| i2c_ll_set_tout

I tried multiple solutions, but nothing worked for me. Can anyone help me solve this error?

[SuGlider]

@M-Rizwan-Anwar - Arduino as Component requests that IDF version matches the correct Arduino Core version.
Can you provide more information about the versions, folder structure, code etc?

[M-Rizwan-Anwar]

I installed ESP-IDF 5.2 version.

[SuGlider]

There is no Arduino Core that uses IDF 5.2. Please change the IDF version using git checkout <TAG> in order to use the right IDF version.
The right version of IDF can be found in each Arduino Core version Release Notes.
Example: Arduino Core 2.0.14 uses IDF 4.4.6 as written in https://github.com/espressif/arduino-esp32/releases/tag/2.0.14

[holdersn]

It looks like the function names have changed:
i2c_ll_cal_bus_clk -> i2c_ll_master_cal_bus_clk
i2c_ll_set_bus_timing -> i2c_ll_master_set_bus_timing
i2c_ll_set_filter -> i2c_ll_master_set_filter

[pshilakari]

Hi,

For my project, I have installed ESP-IDF v 5.4.1 and using Arduino as an ESP-IDF component. In my main, the "idf_component.yml" has following entry:

_dependencies:

Required IDF version

idf: ">=5.3,<5.5"
espressif/arduino-esp32: ^3.2.1_

During the build process (idf.py build) I am continuously getting below errors, which looks like incompatible versions of ESP-IDF and Arduino component in my build environment. But I don't know how to resolve it. Any help from the community members around this will be really helpful.

ERRORS:

D:/Project/managed_components/espressif__arduino-esp32/cores/esp32/esp32-hal-i2c-slave.c: In function 'i2cSlaveInit':
D:/Project/managed_components/espressif__arduino-esp32/cores/esp32/esp32-hal-i2c-slave.c:339:3: error: implicit declaration of function 'i2c_ll_set_mode'; did you mean 'i2c_ll_set_tout'? [-Wimplicit-function-declaration]
339 | i2c_ll_set_mode(i2c->dev, I2C_BUS_MODE_SLAVE);
| ^~~~~~~~~~~~~~~
| i2c_ll_set_tout
D:/Project/managed_components/espressif__arduino-esp32/cores/esp32/esp32-hal-i2c-slave.c:339:29: error: 'I2C_BUS_MODE_SLAVE' undeclared (first use in this function); did you mean 'I2C_MODE_SLAVE'?
339 | i2c_ll_set_mode(i2c->dev, I2C_BUS_MODE_SLAVE);
| ^~~~~~~~~~~~~~~~~~
| I2C_MODE_SLAVE
D:/Project/managed_components/espressif__arduino-esp32/cores/esp32/esp32-hal-i2c-slave.c:339:29: note: each undeclared identifier is reported only once for each function it appears in
D:/Project/managed_components/espressif__arduino-esp32/cores/esp32/esp32-hal-i2c-slave.c:340:3: error: implicit declaration of function 'i2c_ll_enable_pins_open_drain' [-Wimplicit-function-declaration]
340 | i2c_ll_enable_pins_open_drain(i2c->dev, true);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[1453/1714] Building CXX object esp-idf/espressif__arduino-esp32/...spressif__arduino-esp32.dir/cores/esp32/chip-debug-report.cpp.ob
ninja: build stopped: subcommand failed

[me-no-dev]

use IDF 5.4.2 or Arduino 3.2.0. either will work