STM32F407 fails on HAL_RCC_OscConfig

[JBlaz.1]

Hello guys,

I got a "STM32F407-DISC1" board and if I configure the external oscillator, it goes into "error_handling:

RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
 
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
 
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
 
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
 
  RCC_OscInitStruct.PLL.PLLM = 8;
 
  RCC_OscInitStruct.PLL.PLLN = 336;
 
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
 
  RCC_OscInitStruct.PLL.PLLQ = 7;
 
 
 
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
 
  {
 
 
 
    Error_Handler();
 
  }
 

Afterwards program stops and does not continue. What do I need to change in my code? or is it due to a hardware failure?

Cheers

[TDK]

Maybe you're trying to change the PLL while it's already enabled. Who knows. You're not providing much info.

[waclawek.jan]

+1

...or ditch Cube altogether and write the clock setup yourself.

JW

PS If you don't have a crystal but using the STLink MCO output, do you set HSE Bypass?