2025-09-27 7:08 PM
Hello,
I'm chasing a problem where my project is having its configuration of SMPS mode switch back to LDO, and I was realizing that the settings are reset when USB is enabled. Digging into this, I came across this:
/* Enable VDDUSB */
if(__HAL_RCC_PWR_IS_CLK_ENABLED())
{
__HAL_RCC_PWR_CLK_ENABLE();
HAL_PWREx_EnableVddUSB();
HAL_PWREx_EnableUSBPWR();
__HAL_RCC_PWR_CLK_DISABLE();
}
else
{
HAL_PWREx_EnableVddUSB();
}
At a glance, the logic appears incorrect -- why would you enable PWR_CLK when you just checked and it was already enabled? I looked through the v1.7.0 SDK example projects, and saw that most other projects, the line is `if (__HAL_RCC_PWR_IS_CLK_ENABLED() != 1U)`. This only appears here:
./Projects/NUCLEO-WBA65RI/Applications/USBX/Ux_Device_CDC_ACM/Core/Src/stm32wbaxx_hal_msp.c: if(__HAL_RCC_PWR_IS_CLK_ENABLED())
./Projects/NUCLEO-WBA65RI/Applications/USBX/Ux_Device_CDC_ACM/Core/Src/stm32wbaxx_hal_msp.c: if(__HAL_RCC_PWR_IS_CLK_ENABLED())
./Projects/NUCLEO-WBA65RI/Applications/USBX/Ux_Host_HID/Core/Src/stm32wbaxx_hal_msp.c: if(__HAL_RCC_PWR_IS_CLK_ENABLED())
./Projects/NUCLEO-WBA65RI/Applications/USBX/Ux_Host_HID/Core/Src/stm32wbaxx_hal_msp.c: if(__HAL_RCC_PWR_IS_CLK_ENABLED())
./Projects/NUCLEO-WBA65RI/Applications/USBX/Ux_Device_HID_Standalone/Core/Src/stm32wbaxx_hal_msp.c: if(__HAL_RCC_PWR_IS_CLK_ENABLED())
./Projects/NUCLEO-WBA65RI/Applications/USBX/Ux_Device_HID_Standalone/Core/Src/stm32wbaxx_hal_msp.c: if(__HAL_RCC_PWR_IS_CLK_ENABLED())
./Projects/NUCLEO-WBA65RI/Applications/USBX/Ux_Host_HID_Standalone/Core/Src/stm32wbaxx_hal_msp.c: if(__HAL_RCC_PWR_IS_CLK_ENABLED())
./Projects/NUCLEO-WBA65RI/Applications/USBX/Ux_Host_HID_Standalone/Core/Src/stm32wbaxx_hal_msp.c: if(__HAL_RCC_PWR_IS_CLK_ENABLED())
Is this indeed a bug?
Thank you,
Jonathan