Low-power STOP MODE function using NUCLEO-H563ZI

[JEngineerHW]

Hello, I am new to programming the NUCLEO-H563ZI. I am interested in the low-power STOP MODE function.

I have watched an STM32 video tutorial for a different core. Everything works fine except for this function __HAL_RCC_PWR_CLK_ENABLE();

../Core/Src/main.c:98:3: warning: implicit declaration of function ‘__HAL_RCC_PWR_CLK_ENABLE’ [-Wimplicit-function-declaration]

98 | __HAL_RCC_PWR_CLK_ENABLE();

| ^~~~~~~~~~~~~~~~~~~~~~~~

What is causing this error?

Thank you for your help.

[Pavel A.]

Was this main.c generated by CubeMX or part of some STM32H5 example ?

The "implicit declaration" warning means that the function has not been defined. Probably it does not exist at all.

[Saket_Om]

Hello @JEngineerHW 

The problem may be caused by the HAL Power (PWR) module not being enabled in the stm32h5xx_hal_conf.h file.
In this configuration file, verify that the macro HAL_PWR_MODULE_ENABLED is defined (not commented out). If it is missing or commented, the power-related HAL APIs will not be compiled, which can lead to build errors or missing functionality when using power management features on the STM32H5 device.