Where are peripherals initialized?

[FGeig.1]

I am implementing a USBPD application, using the NUCLEO-G474RE example of x-cube-usbpdm1 (it is called TCPP01_Consumer).

The example works fine, but I am a bit confused as to where all the peripherals are initalized. The MX init functions are generated, but in the example project STM32CubeMX was configured to NOT generate a function call.

I have found the place where the ADC and the GPIO pins are initalized, however, I can't find out where UCPD1, DMA or LPUART1 are initalized.

I am quite sure that the init functions generated by STM32CubeMX are never called by the example code. Where are these peripherals initalized?

[Yohann M. · Accepted solution]

Dear @FGeig.1​ 

UCPD1 and LPUART1 initialization are done inside the different drivers:

• UCPD is initialized in the following drivers:
  • Middlewares\ST\STM32_USBPD_Library\Devices\STM32G4XX\src\usbpd_cad_hw_if.c
  • Middlewares/ST/STM32_USBPD_Library/Devices/STM32G4XX/src/usbpd_hw.c
• LPUART is initialized through TRACER_EMB utility:
  • Utilities/TRACER_EMB/tracer_emb_hw.c

It is why we don't need to use the initialization function generated by CubeMX.

Regards,

Yohann

[FGeig.1]

Hi @Yohann M.​ 

Thank you very much for your quick reply, makes perfect sense now!