STM32F407: PLL is not working

[rohitkumarkv07]

I have build a code of Mcu driver for STM32F407 DISCOVERY board. During Flashing my HSE or HSI works fine but PLL doesn't works on. I will attach the the mcu.c and mai.c file for your reference.

Kindly have a look into this help me out.

[waclawek.jan]

Your coding style is quite hard to penetrate. 

You may want to try setting up PLL using straightforward writes to RCC registers, first.

Do you set FLASH waitstates?

JW

[rohitkumarkv07]

Yes, I have set the Flash 

[Andrew Neil]

This is just a duplicate of your existing posts:

https://community.st.com/t5/stm32-mcus-products/stm32f407-mcu-clock-setup/td-p/664127

https://community.st.com/t5/stm32-mcus-boards-and-hardware/stm32f407-clock-setup-using-registers/td-p/663048 

Like  @waclawek.jan, I find the coding style impenetrable.

 

[FBL]

Hi @rohitkumarkv07 

To ensure that your clock configuration is correct and to isolate the issue with your controller,

Create a new project with CubeMX then enable your oscillator and configure your clock tree. 

After that enable an MCO pin to visualize your clock with analyzer/scope.